refactor: replace all master to main

2025-07-09 22:24:26 +02:00 · 2021-04-19 09:51:20 +07:00 · 2021-04-19 09:51:20 +07:00 · b7ac2851c6
commit b7ac2851c6
parent 4148f0b846
55 changed files with 431 additions and 455 deletions
--- a/src/js/app/index.js
+++ b/src/js/app/index.js
@ -187,36 +187,36 @@ var initDemo = function(sandbox) {

  if (params.hasOwnProperty('demo')) {
    commands = [
-      "git commit; git checkout -b bugFix C1; git commit; git merge master; git checkout master; git commit; git rebase bugFix;",
+      "git commit; git checkout -b bugFix C1; git commit; git merge main; git checkout main; git commit; git rebase bugFix;",
      "delay 1000; reset;",
      "level advanced1 --noFinishDialog --noStartCommand --noIntroDialog;",
      "delay 2000; show goal; delay 1000; hide goal;",
-      "git checkout bugFix; git rebase master; git checkout side; git rebase bugFix;",
-      "git checkout another; git rebase side; git rebase another master;",
+      "git checkout bugFix; git rebase main; git checkout side; git rebase bugFix;",
+      "git checkout another; git rebase side; git rebase another main;",
      "help; levels"
    ];
  } else if (params.hasOwnProperty('hgdemo')) {
    commands = [
-      'importTreeNow {"branches":{"master":{"target":"C3","id":"master"},"feature":{"target":"C2","id":"feature"},"debug":{"target":"C4","id":"debug"}},"commits":{"C0":{"parents":[],"id":"C0","rootCommit":true},"C1":{"parents":["C0"],"id":"C1"},"C2":{"parents":["C1"],"id":"C2"},"C3":{"parents":["C1"],"id":"C3"},"C4":{"parents":["C2"],"id":"C4"}},"HEAD":{"target":"feature","id":"HEAD"}}',
+      'importTreeNow {"branches":{"main":{"target":"C3","id":"main"},"feature":{"target":"C2","id":"feature"},"debug":{"target":"C4","id":"debug"}},"commits":{"C0":{"parents":[],"id":"C0","rootCommit":true},"C1":{"parents":["C0"],"id":"C1"},"C2":{"parents":["C1"],"id":"C2"},"C3":{"parents":["C1"],"id":"C3"},"C4":{"parents":["C2"],"id":"C4"}},"HEAD":{"target":"feature","id":"HEAD"}}',
      'delay 1000',
-      'git rebase master',
+      'git rebase main',
      'delay 1000',
      'undo',
      'hg book',
      'delay 1000',
-      'hg rebase -d master'
+      'hg rebase -d main'
    ];
    commands = commands.join(';#').split('#'); // hax
  } else if (params.hasOwnProperty('hgdemo2')) {
    commands = [
-      'importTreeNow {"branches":{"master":{"target":"C3","id":"master"},"feature":{"target":"C2","id":"feature"},"debug":{"target":"C4","id":"debug"}},"commits":{"C0":{"parents":[],"id":"C0","rootCommit":true},"C1":{"parents":["C0"],"id":"C1"},"C2":{"parents":["C1"],"id":"C2"},"C3":{"parents":["C1"],"id":"C3"},"C4":{"parents":["C2"],"id":"C4"}},"HEAD":{"target":"debug","id":"HEAD"}}',
+      'importTreeNow {"branches":{"main":{"target":"C3","id":"main"},"feature":{"target":"C2","id":"feature"},"debug":{"target":"C4","id":"debug"}},"commits":{"C0":{"parents":[],"id":"C0","rootCommit":true},"C1":{"parents":["C0"],"id":"C1"},"C2":{"parents":["C1"],"id":"C2"},"C3":{"parents":["C1"],"id":"C3"},"C4":{"parents":["C2"],"id":"C4"}},"HEAD":{"target":"debug","id":"HEAD"}}',
      'delay 1000',
-      'git rebase master',
+      'git rebase main',
      'delay 1000',
      'undo',
      'hg sum',
      'delay 1000',
-      'hg rebase -d master'
+      'hg rebase -d main'
    ];
    commands = commands.join(';#').split('#'); // hax
  } else if (params.hasOwnProperty('remoteDemo')) {
--- a/src/js/dialogs/sandbox.js
+++ b/src/js/dialogs/sandbox.js
@ -20,7 +20,7 @@ exports.dialog = {
        'Try out ',
        '[this special link](https://pcottle.github.io/learnGitBranching/?NODEMO)',
        '',
-        'PPS: GitHub (and the industry at large) is moving to naming the default branch as `main` instead of `master` ',
+        'PPS: GitHub (and the industry at large) is moving to naming the default branch as `main` instead of `main` ',
        'with [more details available here](https://github.com/github/renaming). In order to accommodate this change in ',
        'a backwards-compatible way, these two names will be considered aliases of each other, with `main` being ',
        'the preferred one to display. We\'ve made a best-effort attempt to update all of the level content, but ',
@ -803,7 +803,7 @@ exports.dialog = {
        'அப்படியானால் பின் வரும் இணைப்பை பயன்பாடித்துக ',
        '[this special link](https://pcottle.github.io/learnGitBranching/?NODEMO)',
        '',
-        'பின்குறிப்பு: GitHub (பெரிய அளவில் பயன்பாட்டில் உள்ள இணையதலம்) `main` என்ற கிளையை `master`-க்கு பதில் ',
+        'பின்குறிப்பு: GitHub (பெரிய அளவில் பயன்பாட்டில் உள்ள இணையதலம்) `main` என்ற கிளையை `main`-க்கு பதில் ',
        'முன்னிருப்பு கிளையாக பயன் படுத்த உள்ளது [more details available here](https://github.com/github/renaming). ',
        'இந்த மாற்றத்தை பின்னோக்கி இணக்கமான வழியில் பொருத்துவதற்காக, `main`-ஐ முதன்மையாக கருதி ',
        'இந்த இரண்டு பெயர்களும் ஒன்றுக்கொன்று மாற்றுப்பெயர்களாகக் கருதப்படும். ',
@ -835,7 +835,7 @@ exports.dialog = {
          "Prova ",
          "[questo link](https://pcottle.github.io/learnGitBranching/?NODEMO?locale=it_IT)",
          "",
-          "PPS: GitHub (e il settore in generale) sta modificando il nome del ramo di default in `main` invece che `master` ",
+          "PPS: GitHub (e il settore in generale) sta modificando il nome del ramo di default in `main` invece che `main` ",
          "leggi [qui per ulteriori dettagli](https://github.com/github/renaming). In modo da adattare questo cambiamento ",
          "e tenere la retrocompatibilità , questi nomi saranno considerati equivalenti. `main` sarà comunque ",
          "il nome predefinito. Ci siamo impegnati per aggiornare tutti i livelli, ma ci sarà ",
@ -846,4 +846,3 @@ exports.dialog = {
    },
  ],
 };
- 
--- a/src/js/git/commands.js
+++ b/src/js/git/commands.js
@ -252,7 +252,7 @@ var commandConfig = {
      } else if (firstArg) {
        source = firstArg;
        assertIsBranch(engine.origin, source);
-        // get o/master locally if master is specified
+        // get o/main locally if main is specified
        destination = engine.origin.resolveID(source).getPrefixedID();
      } else {
        // can't be detached
@ -296,7 +296,7 @@ var commandConfig = {
      switch (generalArgs.length) {
        // git fakeTeamwork
        case 0:
-          branch = 'master';
+          branch = 'main';
          numToMake = 1;
          break;

@ -307,7 +307,7 @@ var commandConfig = {
            numToMake = 1;
          } else {
            numToMake = parseInt(generalArgs[0], 10);
-            branch = 'master';
+            branch = 'main';
          }
          break;

@ -393,7 +393,7 @@ var commandConfig = {
        // technically we have a destination here as the remote branch
        source = firstArg;
        assertIsBranch(engine.origin, source);
-        // get o/master locally if master is specified
+        // get o/main locally if main is specified
        destination = engine.origin.resolveID(source).getPrefixedID();
      }
      if (source) { // empty string fails this check
--- a/src/js/git/index.js
+++ b/src/js/git/index.js
@ -137,14 +137,14 @@ GitEngine.prototype.defaultInit = function() {
 };

 GitEngine.prototype.init = function() {
-  // make an initial commit and a master branch
+  // make an initial commit and a main branch
  this.rootCommit = this.makeCommit(null, null, {rootCommit: true});
  this.commitCollection.add(this.rootCommit);

-  var master = this.makeBranch('master', this.rootCommit);
+  var main = this.makeBranch('main', this.rootCommit);
  this.HEAD = new Ref({
    id: 'HEAD',
-    target: master
+    target: main
  });
  this.refs[this.HEAD.get('id')] = this.HEAD;

@ -330,7 +330,7 @@ GitEngine.prototype.makeOrigin = function(treeString) {
      msg: intl.str('git-error-origin-exists')
    });
  }
-  treeString = treeString || this.printTree(this.exportTreeForBranch('master'));
+  treeString = treeString || this.printTree(this.exportTreeForBranch('main'));

  // this is super super ugly but a necessary hack because of the way LGB was
  // originally designed. We need to get to the top level visualization from
@ -338,8 +338,8 @@ GitEngine.prototype.makeOrigin = function(treeString) {
  // visualization and ask the main vis to create a new vis/git pair. Then
  // we grab the gitengine out of that and assign that as our origin repo
  // which connects the two. epic
-  var masterVis = this.gitVisuals.getVisualization();
-  var originVis = masterVis.makeOrigin({
+  var mainVis = this.gitVisuals.getVisualization();
+  var originVis = mainVis.makeOrigin({
    localRepo: this,
    treeString: treeString
  });
@ -480,9 +480,9 @@ GitEngine.prototype.setLocalToTrackRemote = function(localBranch, remoteBranch)
  }

  var msg = 'local branch "' +
-    this.postProcessBranchID(localBranch.get('id')) +
+    localBranch.get('id') +
    '" set to track remote branch "' +
-    this.postProcessBranchID(remoteBranch.get('id')) +
+    remoteBranch.get('id') +
    '"';
  this.command.addWarning(intl.todo(msg));
 };
@ -694,19 +694,7 @@ GitEngine.prototype.validateAndMakeTag = function(id, target) {
  this.makeTag(id, target);
 };

-GitEngine.prototype.postProcessBranchID = function(id) {
-  if (id.match(/\bmaster\b/)) {
-    id = id.replace(/\bmaster\b/, 'main');
-  }
-  return id;
-}
-
 GitEngine.prototype.makeBranch = function(id, target) {
-  // all main branches are stored as master under the hood
-  if (id.match(/\bmain\b/)) {
-    id = id.replace(/\bmain\b/, 'master');
-  }
-
  if (this.refs[id]) {
    var err = new Error();
    throw new Error('woah already have that ref ' + id + ' ' + err.stack);
@ -1141,8 +1129,8 @@ GitEngine.prototype.push = function(options) {
    }
  }

-  // now here is the tricky part -- the difference between local master
-  // and remote master might be commits C2, C3, and C4, but the remote
+  // now here is the tricky part -- the difference between local main
+  // and remote main might be commits C2, C3, and C4, but the remote
  // might already have those commits. In this case, we don't need to
  // make them, so filter these out
  commitsToMake = commitsToMake.filter(function(commitJSON) {
@ -1195,7 +1183,7 @@ GitEngine.prototype.push = function(options) {
    return this.animationFactory.playRefreshAnimation(this.origin.gitVisuals);
  }.bind(this));

-  // HAX HAX update master and remote tracking for master
+  // HAX HAX update main and remote tracking for main
  chain = chain.then(function() {
    var localCommit = this.getCommitFromRef(sourceLocation);
    this.setTargetLocation(this.resolveID(ORIGIN_PREFIX + options.destination), localCommit);
@ -1211,9 +1199,9 @@ GitEngine.prototype.pushDeleteRemoteBranch = function(
  remoteBranch,
  branchOnRemote
 ) {
-  if (branchOnRemote.get('id') === 'master') {
+  if (branchOnRemote.get('id') === 'main') {
    throw new GitError({
-      msg: intl.todo('You cannot delete master branch on remote!')
+      msg: intl.todo('You cannot delete main branch on remote!')
    });
  }
  // ok so this isn't too bad -- we basically just:
@ -1315,8 +1303,8 @@ GitEngine.prototype.fetchCore = function(sourceDestPairs, options) {
  commitsToMake = Graph.getUniqueObjects(commitsToMake);
  commitsToMake = Graph.descendSortDepth(commitsToMake);

-  // now here is the tricky part -- the difference between local master
-  // and remote master might be commits C2, C3, and C4, but we
+  // now here is the tricky part -- the difference between local main
+  // and remote main might be commits C2, C3, and C4, but we
  // might already have those commits. In this case, we don't need to
  // make them, so filter these out
  commitsToMake = commitsToMake.filter(function(commitJSON) {
@ -1446,7 +1434,7 @@ GitEngine.prototype.pullFinishWithRebase = function(
  }.bind(this));

  chain = chain.then(function() {
-    // highlight last commit on o/master to color of
+    // highlight last commit on o/main to color of
    // local branch
    return this.animationFactory.playHighlightPromiseAnimation(
      this.getCommitFromRef(remoteBranch),
@ -1511,7 +1499,7 @@ GitEngine.prototype.pullFinishWithMerge = function(
  }.bind(this));

  chain = chain.then(function() {
-    // highlight last commit on o/master to color of
+    // highlight last commit on o/main to color of
    // local branch
    return this.animationFactory.playHighlightPromiseAnimation(
      this.getCommitFromRef(remoteBranch),
@ -1520,7 +1508,7 @@ GitEngine.prototype.pullFinishWithMerge = function(
  }.bind(this));

  chain = chain.then(function() {
-    // highlight commit on master to color of remote
+    // highlight commit on main to color of remote
    return this.animationFactory.playHighlightPromiseAnimation(
      this.getCommitFromRef(localBranch),
      remoteBranch
@ -1617,7 +1605,7 @@ GitEngine.prototype.resolveNameNoPrefix = function(someRef) {
    return obj.get('id');
  }
  if (obj.get('type') == 'branch') {
-    return obj.get('id').replace(/\bmaster\b/, 'main');
+    return obj.get('id');
  }
  // we are dealing with HEAD
  return this.resolveNameNoPrefix(obj.get('target'));
@ -1630,7 +1618,7 @@ GitEngine.prototype.resolveName = function(someRef) {
    return 'commit ' + obj.get('id');
  }
  if (obj.get('type') == 'branch') {
-    return 'branch "' + obj.get('id').replace(/\bmaster\b/, 'main') + '"';
+    return 'branch "' + obj.get('id') + '"';
  }
  // we are dealing with HEAD
  return this.resolveName(obj.get('target'));
@ -1681,19 +1669,12 @@ GitEngine.prototype.resolveRelativeRef = function(commit, relative) {
 };

 GitEngine.prototype.doesRefExist = function(ref) {
-  if (ref.match(/\bmain\b/)) {
-    ref = ref.replace(/\bmain\b/, 'master');
-  }
  return !!this.refs[ref]
 };

 GitEngine.prototype.resolveStringRef = function(ref) {
  ref = this.crappyUnescape(ref);

-  if (ref.match(/\bmain\b/)) {
-    ref = ref.replace(/\bmain\b/, 'master');
-  }
-
  if (this.refs[ref]) {
    return this.refs[ref];
  }
@ -2108,18 +2089,18 @@ GitEngine.prototype.hgRebase = function(destination, base) {
    moreSets.push(this.getDownstreamSet(id));
  }, this);

-  var masterSet = {};
-  masterSet[baseCommit.get('id')] = true;
+  var mainSet = {};
+  mainSet[baseCommit.get('id')] = true;
  [upstream, downstream].concat(moreSets).forEach(function(set) {
    Object.keys(set).forEach(function(id) {
-      masterSet[id] = true;
+      mainSet[id] = true;
    });
  });

-  // we also need the branches POINTING to master set
+  // we also need the branches POINTING to main set
  var branchMap = {};
  var upstreamSet = this.getUpstreamBranchSet();
-  Object.keys(masterSet).forEach(function(commitID) {
+  Object.keys(mainSet).forEach(function(commitID) {
    // now loop over that commits branches
    upstreamSet[commitID].forEach(function(branchJSON) {
      branchMap[branchJSON.id] = true;
@ -2131,7 +2112,7 @@ GitEngine.prototype.hgRebase = function(destination, base) {
  chain = chain.then(function() {
    // now we just moved a bunch of commits, but we haven't updated the
    // dangling guys. lets do that and then prune
-    var anyChange = this.updateCommitParentsForHgRebase(masterSet);
+    var anyChange = this.updateCommitParentsForHgRebase(mainSet);
    if (!anyChange) {
      return;
    }
@ -2638,7 +2619,7 @@ GitEngine.prototype.validateAndDeleteBranch = function(name) {
  var target = this.resolveID(name);

  if (target.get('type') !== 'branch' ||
-      target.get('id') == 'master' ||
+      target.get('id') == 'main' ||
      this.HEAD.get('target') === target) {
    throw new GitError({
      msg: intl.str('git-error-branch')
@ -2663,7 +2644,7 @@ GitEngine.prototype.deleteBranch = function(branch) {
  // also in some cases external engines call our delete, so
  // verify integrity of HEAD here
  if (this.HEAD.get('target') === branch) {
-    this.HEAD.set('target', this.refs['master']);
+    this.HEAD.set('target', this.refs['main']);
  }

  if (branch.get('visBranch')) {
@ -2910,8 +2891,8 @@ var Branch = Ref.extend({
   * Here is the deal -- there are essentially three types of branches
   * we deal with:
   * 1) Normal local branches (that may track a remote branch)
-   * 2) Local remote branches (o/master) that track an origin branch
-   * 3) Origin branches (master) that exist in origin
+   * 2) Local remote branches (o/main) that track an origin branch
+   * 3) Origin branches (main) that exist in origin
   *
   * With that in mind, we change our branch model to support the following
   */
--- a/src/js/graph/index.js
+++ b/src/js/graph/index.js
@ -160,7 +160,7 @@ var Graph = {
  },

  getDefaultTree: function() {
-    return JSON.parse(unescape("%7B%22branches%22%3A%7B%22master%22%3A%7B%22target%22%3A%22C1%22%2C%22id%22%3A%22master%22%2C%22type%22%3A%22branch%22%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22type%22%3A%22commit%22%2C%22parents%22%3A%5B%5D%2C%22author%22%3A%22Peter%20Cottle%22%2C%22createTime%22%3A%22Mon%20Nov%2005%202012%2000%3A56%3A47%20GMT-0800%20%28PST%29%22%2C%22commitMessage%22%3A%22Quick%20Commit.%20Go%20Bears%21%22%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22type%22%3A%22commit%22%2C%22parents%22%3A%5B%22C0%22%5D%2C%22author%22%3A%22Peter%20Cottle%22%2C%22createTime%22%3A%22Mon%20Nov%2005%202012%2000%3A56%3A47%20GMT-0800%20%28PST%29%22%2C%22commitMessage%22%3A%22Quick%20Commit.%20Go%20Bears%21%22%2C%22id%22%3A%22C1%22%7D%7D%2C%22HEAD%22%3A%7B%22id%22%3A%22HEAD%22%2C%22target%22%3A%22master%22%2C%22type%22%3A%22general%20ref%22%7D%7D"));
+    return JSON.parse(unescape("%7B%22branches%22%3A%7B%22main%22%3A%7B%22target%22%3A%22C1%22%2C%22id%22%3A%22main%22%2C%22type%22%3A%22branch%22%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22type%22%3A%22commit%22%2C%22parents%22%3A%5B%5D%2C%22author%22%3A%22Peter%20Cottle%22%2C%22createTime%22%3A%22Mon%20Nov%2005%202012%2000%3A56%3A47%20GMT-0800%20%28PST%29%22%2C%22commitMessage%22%3A%22Quick%20Commit.%20Go%20Bears%21%22%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22type%22%3A%22commit%22%2C%22parents%22%3A%5B%22C0%22%5D%2C%22author%22%3A%22Peter%20Cottle%22%2C%22createTime%22%3A%22Mon%20Nov%2005%202012%2000%3A56%3A47%20GMT-0800%20%28PST%29%22%2C%22commitMessage%22%3A%22Quick%20Commit.%20Go%20Bears%21%22%2C%22id%22%3A%22C1%22%7D%7D%2C%22HEAD%22%3A%7B%22id%22%3A%22HEAD%22%2C%22target%22%3A%22main%22%2C%22type%22%3A%22general%20ref%22%7D%7D"));
  }
 };

--- a/src/js/graph/treeCompare.js
+++ b/src/js/graph/treeCompare.js
@ -11,12 +11,12 @@ TreeCompare.dispatchFromLevel = function(levelBlob, treeToCompare) {
  return TreeCompare.dispatch(levelBlob, goalTreeString, treeToCompare);
 };

-TreeCompare.onlyMasterCompared = function(levelBlob) {
+TreeCompare.onlyMainCompared = function(levelBlob) {
  var getAroundLintTrue = true;
  switch (getAroundLintTrue) {
-    case !!levelBlob.compareOnlyMaster:
-    case !!levelBlob.compareOnlyMasterHashAgnostic:
-    case !!levelBlob.compareOnlyMasterHashAgnosticWithAsserts:
+    case !!levelBlob.compareOnlyMain:
+    case !!levelBlob.compareOnlyMainHashAgnostic:
+    case !!levelBlob.compareOnlyMainHashAgnosticWithAsserts:
      return true;
    default:
      return false;
@ -50,9 +50,9 @@ TreeCompare.dispatchShallow = function(levelBlob, goalTreeString, treeToCompare)
  var getAroundLintTrue = true;
  // i actually prefer this to else if
  switch (getAroundLintTrue) {
-    case !!levelBlob.compareOnlyMaster:
+    case !!levelBlob.compareOnlyMain:
      return TreeCompare.compareBranchWithinTrees(
-        treeToCompare, goalTreeString, 'master'
+        treeToCompare, goalTreeString, 'main'
      );
    case !!levelBlob.compareAllBranchesAndEnforceBranchCleanup:
      return TreeCompare.compareAllBranchesAndEnforceBranchCleanup(
@ -66,13 +66,13 @@ TreeCompare.dispatchShallow = function(levelBlob, goalTreeString, treeToCompare)
      return TreeCompare.compareAllBranchesWithinTreesHashAgnostic(
        treeToCompare, goalTreeString
      );
-    case !!levelBlob.compareOnlyMasterHashAgnostic:
+    case !!levelBlob.compareOnlyMainHashAgnostic:
      return TreeCompare.compareBranchesWithinTreesHashAgnostic(
-        treeToCompare, goalTreeString, ['master']
+        treeToCompare, goalTreeString, ['main']
      );
-    case !!levelBlob.compareOnlyMasterHashAgnosticWithAsserts:
+    case !!levelBlob.compareOnlyMainHashAgnosticWithAsserts:
      return TreeCompare.compareBranchesWithinTreesHashAgnostic(
-        treeToCompare, goalTreeString, ['master']
+        treeToCompare, goalTreeString, ['main']
      ) && TreeCompare.evalAsserts(treeToCompare, levelBlob.goalAsserts);
    default:
      return TreeCompare.compareAllBranchesWithinTreesAndHEAD(
@ -98,7 +98,7 @@ TreeCompare.compareAllBranchesAndEnforceBranchCleanup = function(treeToCompare,

  // Unlike compareAllBranchesWithinTrees, here we consider both the branches
  // in the goalTree and the branches in the treeToCompare. This means that
-  // we enfoce that you clean up any branches that you have locally that
+  // we enforce that you clean up any branches that you have locally that
  // the goal does not have. this is helpful when we want to verify that you
  // have deleted branch, for instance.
  var allBranches = Object.assign(
--- a/src/js/level/builder.js
+++ b/src/js/level/builder.js
@ -79,7 +79,7 @@ var LevelBuilder = Level.extend({
  initGoalData: function() {
    // add some default behavior in the beginning if we are not editing
    if (!this.options.editLevel) {
-      this.level.goalTreeString = '{"branches":{"master":{"target":"C1","id":"master"},"makeLevel":{"target":"C2","id":"makeLevel"}},"commits":{"C0":{"parents":[],"id":"C0","rootCommit":true},"C1":{"parents":["C0"],"id":"C1"},"C2":{"parents":["C1"],"id":"C2"}},"HEAD":{"target":"makeLevel","id":"HEAD"}}';
+      this.level.goalTreeString = '{"branches":{"main":{"target":"C1","id":"main"},"makeLevel":{"target":"C2","id":"makeLevel"}},"commits":{"C0":{"parents":[],"id":"C0","rootCommit":true},"C1":{"parents":["C0"],"id":"C1"},"C2":{"parents":["C1"],"id":"C2"}},"HEAD":{"target":"makeLevel","id":"HEAD"}}';
      this.level.solutionCommand = 'git checkout -b makeLevel; git commit';
    }
    LevelBuilder.__super__.initGoalData.apply(this, arguments);
@ -294,8 +294,8 @@ var LevelBuilder = Level.extend({
      this.defineName();
    }

-    var masterDeferred = Q.defer();
-    var chain = masterDeferred.promise;
+    var mainDeferred = Q.defer();
+    var chain = mainDeferred.promise;

    if (this.level.hint === undefined) {
      var askForHintDeferred = Q.defer();
@ -355,7 +355,7 @@ var LevelBuilder = Level.extend({
      command.finishWith(deferred);
    }.bind(this));

-    masterDeferred.resolve();
+    mainDeferred.resolve();
  },

  getExportObj: function() {
--- a/src/js/level/index.js
+++ b/src/js/level/index.js
@ -197,10 +197,10 @@ var Level = Sandbox.extend({
  },

  initGoalVisualization: function() {
-    var onlyMaster = TreeCompare.onlyMasterCompared(this.level);
+    var onlyMain = TreeCompare.onlyMainCompared(this.level);
    // first we make the goal visualization holder
    this.goalCanvasHolder = new CanvasTerminalHolder({
-      text: (onlyMaster) ? intl.str('goal-only-main') : undefined,
+      text: (onlyMain) ? intl.str('goal-only-main') : undefined,
      parent: this
    });

--- a/src/js/sandbox/index.js
+++ b/src/js/sandbox/index.js
@ -85,7 +85,7 @@ var Sandbox = Backbone.View.extend({
  },

  releaseControl: function() {
-    // we will be handling commands that are submitted, mainly to add the sanadbox
+    // we will be handling commands that are submitted, mainly to add the sandbox
    // functionality (which is included by default in ParseWaterfall())
    Main.getEventBaton().releaseBaton('commandSubmitted', this.commandSubmitted, this);
    // we obviously take care of sandbox commands
--- a/src/js/visuals/index.js
+++ b/src/js/visuals/index.js
@ -550,8 +550,8 @@ GitVisuals.prototype.calcBranchStacks = function() {
    map[thisId].sort(function(a, b) {
      var aId = a.obj.get('id');
      var bId = b.obj.get('id');
-      if (aId == 'master' || bId == 'master') {
-        return aId == 'master' ? -1 : 1;
+      if (aId == 'main' || bId == 'main') {
+        return aId == 'main' ? -1 : 1;
      }
      return aId.localeCompare(bId);
    });
--- a/src/js/visuals/visBranch.js
+++ b/src/js/visuals/visBranch.js
@ -68,7 +68,7 @@ var VisBranch = VisBase.extend({
      this.refreshOffset();

      this.set('fill', GRAPHICS.headRectFill);
-    } else if (id !== 'master') {
+    } else if (id !== 'main') {
      // we need to set our color to something random
      this.set('fill', randomHueString());
    }
@ -103,16 +103,16 @@ var VisBranch = VisBase.extend({
   * compared in the goal (used in a goal visualization context
   */
  getIsLevelBranchCompared: function() {
-    if (this.getIsMaster()) {
-      return true; // master always compared
+    if (this.getIsMain()) {
+      return true; // main always compared
    }
-    // we are not master, so return true if its not just master being compared
+    // we are not main, so return true if its not just main being compared
    var levelBlob = this.get('gitVisuals').getLevelBlob();
-    return !TreeCompare.onlyMasterCompared(levelBlob);
+    return !TreeCompare.onlyMainCompared(levelBlob);
  },

-  getIsMaster: function() {
-    return this.get('branch').get('id') == 'master';
+  getIsMain: function() {
+    return this.get('branch').get('id') == 'main';
  },

  getFlipValue: function(commit, visNode) {
@ -357,9 +357,6 @@ var VisBranch = VisBase.extend({
    if (name === 'HEAD' && isHg) {
      name = '.';
    }
-    if (name.match(/\bmaster\b/)) {
-      name = name.replace(/\bmaster\b/, 'main');
-    }

    var after = (selected && !this.getIsInOrigin() && !isRemote) ? '*' : '';
    return name + after;
--- a/src/js/visuals/visTag.js
+++ b/src/js/visuals/visTag.js
@ -81,9 +81,9 @@ var VisTag = VisBase.extend({
   * compared in the goal (used in a goal visualization context
   */
  getIsLevelTagCompared: function() {
-    // we are not master, so return true if its not just master being compared
+    // we are not main, so return true if its not just main being compared
    var levelBlob = this.get('gitVisuals').getLevelBlob();
-    return !TreeCompare.onlyMasterCompared(levelBlob);
+    return !TreeCompare.onlyMainCompared(levelBlob);
  },

  getTagStackIndex: function() {
--- a/src/levels/advanced/multipleParents.js
+++ b/src/levels/advanced/multipleParents.js
@ -1,7 +1,7 @@
 exports.level = {
-  "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C7\",\"id\":\"master\"},\"bugWork\":{\"target\":\"C2\",\"id\":\"bugWork\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C2\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C4\",\"C5\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}",
+  "goalTreeString": "{\"branches\":{\"main\":{\"target\":\"C7\",\"id\":\"main\"},\"bugWork\":{\"target\":\"C2\",\"id\":\"bugWork\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C2\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C4\",\"C5\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}",
  "solutionCommand": "git branch bugWork main^^2^",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C7\",\"id\":\"master\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C2\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C4\",\"C5\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C7\",\"id\":\"main\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C2\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C4\",\"C5\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}",
  "name": {
    "en_US": "Multiple parents",
    "zh_CN": "两个父节点",
--- a/src/levels/index.js
+++ b/src/levels/index.js
@ -37,7 +37,7 @@ exports.levelSequences = {
    require('./remote/fakeTeamwork').level,
    require('./remote/push').level,
    require('./remote/fetchRebase').level,
-    require('./remote/lockedMaster').level
+    require('./remote/lockedMain').level
  ],
  remoteAdvanced: [
    require('./remote/pushManyFeatures').level,
--- a/src/levels/intro/branching.js
+++ b/src/levels/intro/branching.js
@ -1,5 +1,5 @@
 exports.level = {
-  "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\"},\"bugFix\":{\"target\":\"C1\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"bugFix\",\"id\":\"HEAD\"}}",
+  "goalTreeString": "{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\"},\"bugFix\":{\"target\":\"C1\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"bugFix\",\"id\":\"HEAD\"}}",
  "solutionCommand": "git branch bugFix;git checkout bugFix",
  "name": {
    "en_US": "Branching in Git",
--- a/src/levels/intro/commits.js
+++ b/src/levels/intro/commits.js
@ -20,9 +20,9 @@ exports.level = {
    'it_IT': "Introduzione ai commit in Git",
    "ta_IN": "கிட் கமிட்கள் ஒரு அறிமுகம்"
  },
-  "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C3\",\"id\":\"master\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}",
+  "goalTreeString": "{\"branches\":{\"main\":{\"target\":\"C3\",\"id\":\"main\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}",
  "solutionCommand": "git commit;git commit",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}",
  "hint": {
    "en_US": "Just type in 'git commit' twice to finish!",
    "de_DE": "Gib einfach zweimal 'git commit' ein um den Level abzuschließen",
--- a/src/levels/intro/merging.js
+++ b/src/levels/intro/merging.js
@ -1,5 +1,5 @@
 exports.level = {
-  "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C4\",\"id\":\"master\"},\"bugFix\":{\"target\":\"C2\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\",\"C2\"],\"id\":\"C4\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}",
+  "goalTreeString": "{\"branches\":{\"main\":{\"target\":\"C4\",\"id\":\"main\"},\"bugFix\":{\"target\":\"C2\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\",\"C2\"],\"id\":\"C4\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}",
  "solutionCommand": "git checkout -b bugFix;git commit;git checkout main;git commit;git merge bugFix",
  "name": {
    "en_US": "Merging in Git",
@ -25,7 +25,7 @@ exports.level = {
  "hint": {
    "en_US": "Remember to commit in the order specified (bugFix before main)",
    "de_DE": "Denk dran in der angegebenen Reihenfolge zu committen (erst bugFix, dann main)",
-    "ja"　　　: "指示された順番でコミットすること（masterの前にbugFixで）",
+    "ja"　　　: "指示された順番でコミットすること（mainの前にbugFixで）",
    "es_AR": "Acordate de commitear en el orden especificado (bugFix antes de main)",
    "es_MX": "Acuérdate de hacer commit en el orden especificado (bugFix antes de main)",
    "es_ES": "Acuérdate de hacer commit en el orden especificado (bugFix antes de main)",
--- a/src/levels/intro/rebasing.js
+++ b/src/levels/intro/rebasing.js
@ -1,5 +1,5 @@
 exports.level = {
-  "goalTreeString": "%7B%22branches%22%3A%7B%22master%22%3A%7B%22target%22%3A%22C3%22%2C%22id%22%3A%22master%22%7D%2C%22bugFix%22%3A%7B%22target%22%3A%22C2%27%22%2C%22id%22%3A%22bugFix%22%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C2%27%22%3A%7B%22parents%22%3A%5B%22C3%22%5D%2C%22id%22%3A%22C2%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22bugFix%22%2C%22id%22%3A%22HEAD%22%7D%7D",
+  "goalTreeString": "%7B%22branches%22%3A%7B%22main%22%3A%7B%22target%22%3A%22C3%22%2C%22id%22%3A%22main%22%7D%2C%22bugFix%22%3A%7B%22target%22%3A%22C2%27%22%2C%22id%22%3A%22bugFix%22%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C2%27%22%3A%7B%22parents%22%3A%5B%22C3%22%5D%2C%22id%22%3A%22C2%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22bugFix%22%2C%22id%22%3A%22HEAD%22%7D%7D",
  "solutionCommand": "git checkout -b bugFix;git commit;git checkout main;git commit;git checkout bugFix;git rebase main",
  "name": {
    "en_US": "Rebase Introduction",
@ -201,16 +201,16 @@ exports.level = {
            "beforeMarkdowns": [
              "前回と同様の2つのブランチを考えます。仮にいまbugFixブランチをチェックアウトしているとします。（アスタリスクつきのもの）",
              "",
-              "bugFixに入ってる作業内容をそのまま直接masterブランチ上の内容に移動したいとします。こうすることで、実際には並行して開発された2つの別々のブランチ上の機能のソースを、あたかも1本のブランチ上で連続して開発されていたかのように見せることができます。",
+              "bugFixに入ってる作業内容をそのまま直接mainブランチ上の内容に移動したいとします。こうすることで、実際には並行して開発された2つの別々のブランチ上の機能のソースを、あたかも1本のブランチ上で連続して開発されていたかのように見せることができます。",
              "",
              "`git rebase`コマンドでそれをやってみましょう。"
            ],
            "afterMarkdowns": [
-              "できました！これでbugFixブランチの作業内容はmasterブランチのすぐ先に移動したので、見た目が一本になってスッキリしました。",
+              "できました！これでbugFixブランチの作業内容はmainブランチのすぐ先に移動したので、見た目が一本になってスッキリしました。",
              "",
-              "気を付けてほしいのは、C3コミットはどこかに残ってるということ（ツリーの中で半透明にしてあります）、そしてC3'は（C1との接続が切れているC3の）コピーがmasterブランチ上に作られているということです。",
+              "気を付けてほしいのは、C3コミットはどこかに残ってるということ（ツリーの中で半透明にしてあります）、そしてC3'は（C1との接続が切れているC3の）コピーがmainブランチ上に作られているということです。",
              "",
-              "一つ問題が残ってて、masterブランチがまだ最新化されていませんね。ちょっと直してみましょう。。"
+              "一つ問題が残ってて、mainブランチがまだ最新化されていませんね。ちょっと直してみましょう。。"
            ],
            "command": "git rebase main",
            "beforeCommand": "git commit; git checkout -b bugFix C1; git commit"
@ -220,7 +220,7 @@ exports.level = {
          "type": "GitDemonstrationView",
          "options": {
            "beforeMarkdowns": [
-              "masterブランチにチェックアウトしてあります。この状態からmasterブランチを`bugFix`へとリベースしてみましょう。"
+              "mainブランチにチェックアウトしてあります。この状態からmainブランチを`bugFix`へとリベースしてみましょう。"
            ],
            "afterMarkdowns": [
              "できた！`main`は`bugFix`の直前のコミットだったので、gitは単純に`main`ブランチのポインタを前に進めただけでした。"
@ -237,8 +237,8 @@ exports.level = {
              "",
              "* `bugFix`という名前の新しいブランチをチェックアウトする",
              "* 一回だけコミット",
-              "* masterブランチに戻ってもう1回コミット",
-              "* bugFixをもう1回チェックアウトして、master上にリベース",
+              "* mainブランチに戻ってもう1回コミット",
+              "* bugFixをもう1回チェックアウトして、main上にリベース",
              "",
              "幸運を祈る！"
            ]
--- a/src/levels/mixed/describe.js
+++ b/src/levels/mixed/describe.js
@ -1,7 +1,7 @@
 exports.level = {
-  "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\",\"remoteTrackingBranchID\":null},\"side\":{\"target\":\"C4\",\"id\":\"side\",\"remoteTrackingBranchID\":null},\"bugFix\":{\"target\":\"C7\",\"id\":\"bugFix\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C3\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"}},\"tags\":{\"v0\":{\"target\":\"C0\",\"id\":\"v0\",\"type\":\"tag\"},\"v1\":{\"target\":\"C3\",\"id\":\"v1\",\"type\":\"tag\"}},\"HEAD\":{\"target\":\"bugFix\",\"id\":\"HEAD\"}}",
+  "goalTreeString": "{\"branches\":{\"main\":{\"target\":\"C2\",\"id\":\"main\",\"remoteTrackingBranchID\":null},\"side\":{\"target\":\"C4\",\"id\":\"side\",\"remoteTrackingBranchID\":null},\"bugFix\":{\"target\":\"C7\",\"id\":\"bugFix\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C3\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"}},\"tags\":{\"v0\":{\"target\":\"C0\",\"id\":\"v0\",\"type\":\"tag\"},\"v1\":{\"target\":\"C3\",\"id\":\"v1\",\"type\":\"tag\"}},\"HEAD\":{\"target\":\"bugFix\",\"id\":\"HEAD\"}}",
  "solutionCommand": "git commit ",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\",\"remoteTrackingBranchID\":null},\"side\":{\"target\":\"C4\",\"id\":\"side\",\"remoteTrackingBranchID\":null},\"bugFix\":{\"target\":\"C6\",\"id\":\"bugFix\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C3\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"}},\"tags\":{\"v0\":{\"target\":\"C0\",\"id\":\"v0\",\"type\":\"tag\"},\"v1\":{\"target\":\"C3\",\"id\":\"v1\",\"type\":\"tag\"}},\"HEAD\":{\"target\":\"bugFix\",\"id\":\"HEAD\"}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C2\",\"id\":\"main\",\"remoteTrackingBranchID\":null},\"side\":{\"target\":\"C4\",\"id\":\"side\",\"remoteTrackingBranchID\":null},\"bugFix\":{\"target\":\"C6\",\"id\":\"bugFix\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C3\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"}},\"tags\":{\"v0\":{\"target\":\"C0\",\"id\":\"v0\",\"type\":\"tag\"},\"v1\":{\"target\":\"C3\",\"id\":\"v1\",\"type\":\"tag\"}},\"HEAD\":{\"target\":\"bugFix\",\"id\":\"HEAD\"}}",
  "name": {
    "en_US": "Git Describe",
    "fr_FR": "Git describe",
--- a/src/levels/mixed/grabbingOneCommit.js
+++ b/src/levels/mixed/grabbingOneCommit.js
@ -1,7 +1,7 @@
 exports.level = {
-  "compareOnlyMasterHashAgnosticWithAsserts": true,
+  "compareOnlyMainHashAgnosticWithAsserts": true,
  "goalAsserts": {
-    "master": [
+    "main": [
      function(data) {
        return data.C4 > data.C1;
      }
@ -10,9 +10,9 @@ exports.level = {
  "disabledMap": {
    "git revert": true
  },
-  "goalTreeString": "%7B%22branches%22%3A%7B%22master%22%3A%7B%22target%22%3A%22C4%27%22%2C%22id%22%3A%22master%22%7D%2C%22debug%22%3A%7B%22target%22%3A%22C2%22%2C%22id%22%3A%22debug%22%7D%2C%22printf%22%3A%7B%22target%22%3A%22C3%22%2C%22id%22%3A%22printf%22%7D%2C%22bugFix%22%3A%7B%22target%22%3A%22C4%27%22%2C%22id%22%3A%22bugFix%22%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C4%22%3A%7B%22parents%22%3A%5B%22C3%22%5D%2C%22id%22%3A%22C4%22%7D%2C%22C4%27%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C4%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22master%22%2C%22id%22%3A%22HEAD%22%7D%7D",
+  "goalTreeString": "%7B%22branches%22%3A%7B%22main%22%3A%7B%22target%22%3A%22C4%27%22%2C%22id%22%3A%22main%22%7D%2C%22debug%22%3A%7B%22target%22%3A%22C2%22%2C%22id%22%3A%22debug%22%7D%2C%22printf%22%3A%7B%22target%22%3A%22C3%22%2C%22id%22%3A%22printf%22%7D%2C%22bugFix%22%3A%7B%22target%22%3A%22C4%27%22%2C%22id%22%3A%22bugFix%22%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C4%22%3A%7B%22parents%22%3A%5B%22C3%22%5D%2C%22id%22%3A%22C4%22%7D%2C%22C4%27%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C4%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22main%22%2C%22id%22%3A%22HEAD%22%7D%7D",
  "solutionCommand": "git rebase -i main --solution-ordering C4; git rebase bugFix main",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\"},\"debug\":{\"target\":\"C2\",\"id\":\"debug\"},\"printf\":{\"target\":\"C3\",\"id\":\"printf\"},\"bugFix\":{\"target\":\"C4\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"}},\"HEAD\":{\"target\":\"bugFix\",\"id\":\"HEAD\"}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\"},\"debug\":{\"target\":\"C2\",\"id\":\"debug\"},\"printf\":{\"target\":\"C3\",\"id\":\"printf\"},\"bugFix\":{\"target\":\"C4\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"}},\"HEAD\":{\"target\":\"bugFix\",\"id\":\"HEAD\"}}",
  "name": {
    "ko": "딱 한 개의 커밋만 가져오기",
    "en_US": "Grabbing Just 1 Commit",
--- a/src/levels/mixed/jugglingCommits.js
+++ b/src/levels/mixed/jugglingCommits.js
@ -3,9 +3,9 @@ exports.level = {
    "git cherry-pick": true,
    "git revert": true
  },
-  "compareOnlyMasterHashAgnosticWithAsserts": true,
+  "compareOnlyMainHashAgnosticWithAsserts": true,
  "goalAsserts": {
-    "master": [
+    "main": [
      function(data) {
        return data.C2 > data.C3;
      },
@ -14,9 +14,9 @@ exports.level = {
      }
    ]
  },
-  "goalTreeString": "%7B%22branches%22%3A%7B%22master%22%3A%7B%22target%22%3A%22C3%27%27%22%2C%22id%22%3A%22master%22%7D%2C%22newImage%22%3A%7B%22target%22%3A%22C2%22%2C%22id%22%3A%22newImage%22%7D%2C%22caption%22%3A%7B%22target%22%3A%22C3%27%27%22%2C%22id%22%3A%22caption%22%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C3%27%22%7D%2C%22C2%27%22%3A%7B%22parents%22%3A%5B%22C3%27%22%5D%2C%22id%22%3A%22C2%27%22%7D%2C%22C2%27%27%22%3A%7B%22parents%22%3A%5B%22C3%27%22%5D%2C%22id%22%3A%22C2%27%27%22%7D%2C%22C2%27%27%27%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%27%27%27%22%7D%2C%22C3%27%27%22%3A%7B%22parents%22%3A%5B%22C2%27%27%27%22%5D%2C%22id%22%3A%22C3%27%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22master%22%2C%22id%22%3A%22HEAD%22%7D%7D",
+  "goalTreeString": "%7B%22branches%22%3A%7B%22main%22%3A%7B%22target%22%3A%22C3%27%27%22%2C%22id%22%3A%22main%22%7D%2C%22newImage%22%3A%7B%22target%22%3A%22C2%22%2C%22id%22%3A%22newImage%22%7D%2C%22caption%22%3A%7B%22target%22%3A%22C3%27%27%22%2C%22id%22%3A%22caption%22%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C3%27%22%7D%2C%22C2%27%22%3A%7B%22parents%22%3A%5B%22C3%27%22%5D%2C%22id%22%3A%22C2%27%22%7D%2C%22C2%27%27%22%3A%7B%22parents%22%3A%5B%22C3%27%22%5D%2C%22id%22%3A%22C2%27%27%22%7D%2C%22C2%27%27%27%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%27%27%27%22%7D%2C%22C3%27%27%22%3A%7B%22parents%22%3A%5B%22C2%27%27%27%22%5D%2C%22id%22%3A%22C3%27%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22main%22%2C%22id%22%3A%22HEAD%22%7D%7D",
  "solutionCommand": "git rebase -i HEAD~2 --solution-ordering C3,C2;git commit --amend;git rebase -i HEAD~2 --solution-ordering C2'',C3';git rebase caption main",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\"},\"newImage\":{\"target\":\"C2\",\"id\":\"newImage\"},\"caption\":{\"target\":\"C3\",\"id\":\"caption\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"caption\",\"id\":\"HEAD\"}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\"},\"newImage\":{\"target\":\"C2\",\"id\":\"newImage\"},\"caption\":{\"target\":\"C3\",\"id\":\"caption\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"caption\",\"id\":\"HEAD\"}}",
  "name": {
    "ko": "커밋들 갖고 놀기",
    "en_US": "Juggling Commits",
@ -323,7 +323,7 @@ exports.level = {
              "* `git rebase -i`を使って順番を変更する。これで、変更をかけたいコミットを一番先頭に持ってくる。",
              "* `git commit --amend`コマンドで僅かな変更を行う",
              "* `git rebase -i`コマンドを再度使って、先頭に持ってきていたコミットを元に戻す",
-              "* 最後に、レベルクリアのためにmasterブランチを先頭に持ってくる",
+              "* 最後に、レベルクリアのためにmainブランチを先頭に持ってくる",
              "",
              "クリアのための方法はいくつもありますが（cherry-pickを使うこともできます）、別の回答はまた後程の章で見ることにして、今回は上記の方法でやってみることにしましょう。",
              "",
--- a/src/levels/mixed/jugglingCommits2.js
+++ b/src/levels/mixed/jugglingCommits2.js
@ -1,13 +1,13 @@
 exports.level = {
-  "goalTreeString": "%7B%22branches%22%3A%7B%22master%22%3A%7B%22target%22%3A%22C3%27%22%2C%22id%22%3A%22master%22%7D%2C%22newImage%22%3A%7B%22target%22%3A%22C2%22%2C%22id%22%3A%22newImage%22%7D%2C%22caption%22%3A%7B%22target%22%3A%22C3%22%2C%22id%22%3A%22caption%22%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C2%27%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%27%22%7D%2C%22C2%27%27%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%27%27%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C2%27%27%22%5D%2C%22id%22%3A%22C3%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22master%22%2C%22id%22%3A%22HEAD%22%7D%7D",
+  "goalTreeString": "%7B%22branches%22%3A%7B%22main%22%3A%7B%22target%22%3A%22C3%27%22%2C%22id%22%3A%22main%22%7D%2C%22newImage%22%3A%7B%22target%22%3A%22C2%22%2C%22id%22%3A%22newImage%22%7D%2C%22caption%22%3A%7B%22target%22%3A%22C3%22%2C%22id%22%3A%22caption%22%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C2%27%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%27%22%7D%2C%22C2%27%27%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%27%27%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C2%27%27%22%5D%2C%22id%22%3A%22C3%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22main%22%2C%22id%22%3A%22HEAD%22%7D%7D",
  "solutionCommand": "git checkout main;git cherry-pick C2;git commit --amend;git cherry-pick C3",
  "disabledMap": {
    "git revert": true
  },
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\"},\"newImage\":{\"target\":\"C2\",\"id\":\"newImage\"},\"caption\":{\"target\":\"C3\",\"id\":\"caption\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"caption\",\"id\":\"HEAD\"}}",
-  "compareOnlyMasterHashAgnosticWithAsserts": true,
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\"},\"newImage\":{\"target\":\"C2\",\"id\":\"newImage\"},\"caption\":{\"target\":\"C3\",\"id\":\"caption\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"caption\",\"id\":\"HEAD\"}}",
+  "compareOnlyMainHashAgnosticWithAsserts": true,
  "goalAsserts": {
-    "master": [
+    "main": [
      function(data) {
        return data.C2 >= data.C3;
      },
@ -43,7 +43,7 @@ exports.level = {
    "pt_BR": "Não se esqueça de avançar a referência do main para as mudanças efetuadas!",
    "gl"   : "¡Non te esquezas de avanzar main ós cambios actualizados!",
    "de_DE": "Vergiss nicht den main auf die aktuelle Version vorzuspulen",
-    "ja": "masterのポインタを先に進めることを忘れずに！",
+    "ja": "mainのポインタを先に進めることを忘れずに！",
    "ko": "main을 변경 완료한 커밋으로 이동(forward)시키는 것을 잊지 마세요!",
    "zh_CN": "别忘记了将 main 快进到最新的更新上！",
    "zh_TW": "別忘記了將 main 推到最新的 commit 上面！",
--- a/src/levels/mixed/tags.js
+++ b/src/levels/mixed/tags.js
@ -1,7 +1,7 @@
 exports.level = {
-  "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C5\",\"id\":\"master\",\"remoteTrackingBranchID\":null},\"side\":{\"target\":\"C3\",\"id\":\"side\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C1\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C2\",\"C4\"],\"id\":\"C5\"}},\"tags\":{\"v1\":{\"target\":\"C2\",\"id\":\"v1\",\"type\":\"tag\"},\"v0\":{\"target\":\"C1\",\"id\":\"v0\",\"type\":\"tag\"}},\"HEAD\":{\"target\":\"C2\",\"id\":\"HEAD\"}}",
+  "goalTreeString": "{\"branches\":{\"main\":{\"target\":\"C5\",\"id\":\"main\",\"remoteTrackingBranchID\":null},\"side\":{\"target\":\"C3\",\"id\":\"side\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C1\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C2\",\"C4\"],\"id\":\"C5\"}},\"tags\":{\"v1\":{\"target\":\"C2\",\"id\":\"v1\",\"type\":\"tag\"},\"v0\":{\"target\":\"C1\",\"id\":\"v0\",\"type\":\"tag\"}},\"HEAD\":{\"target\":\"C2\",\"id\":\"HEAD\"}}",
  "solutionCommand": "git tag v1 side~1;git tag v0 main~2;git checkout v1",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C5\",\"id\":\"master\",\"remoteTrackingBranchID\":null},\"side\":{\"target\":\"C3\",\"id\":\"side\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C1\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C2\",\"C4\"],\"id\":\"C5\"}},\"tags\":{},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C5\",\"id\":\"main\",\"remoteTrackingBranchID\":null},\"side\":{\"target\":\"C3\",\"id\":\"side\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C1\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C2\",\"C4\"],\"id\":\"C5\"}},\"tags\":{},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}",
  "name": {
    "en_US": "Git Tags",
    "de_DE": "Git Tags",
--- a/src/levels/rampup/cherryPick.js
+++ b/src/levels/rampup/cherryPick.js
@ -1,11 +1,11 @@
 exports.level = {
-  "goalTreeString": "%7B%22branches%22%3A%7B%22master%22%3A%7B%22target%22%3A%22C7%27%22%2C%22id%22%3A%22master%22%7D%2C%22bugFix%22%3A%7B%22target%22%3A%22C3%22%2C%22id%22%3A%22bugFix%22%7D%2C%22side%22%3A%7B%22target%22%3A%22C5%22%2C%22id%22%3A%22side%22%7D%2C%22another%22%3A%7B%22target%22%3A%22C7%22%2C%22id%22%3A%22another%22%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C4%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C4%22%7D%2C%22C5%22%3A%7B%22parents%22%3A%5B%22C4%22%5D%2C%22id%22%3A%22C5%22%7D%2C%22C6%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C6%22%7D%2C%22C7%22%3A%7B%22parents%22%3A%5B%22C6%22%5D%2C%22id%22%3A%22C7%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C3%27%22%7D%2C%22C4%27%22%3A%7B%22parents%22%3A%5B%22C3%27%22%5D%2C%22id%22%3A%22C4%27%22%7D%2C%22C7%27%22%3A%7B%22parents%22%3A%5B%22C4%27%22%5D%2C%22id%22%3A%22C7%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22master%22%2C%22id%22%3A%22HEAD%22%7D%7D",
+  "goalTreeString": "%7B%22branches%22%3A%7B%22main%22%3A%7B%22target%22%3A%22C7%27%22%2C%22id%22%3A%22main%22%7D%2C%22bugFix%22%3A%7B%22target%22%3A%22C3%22%2C%22id%22%3A%22bugFix%22%7D%2C%22side%22%3A%7B%22target%22%3A%22C5%22%2C%22id%22%3A%22side%22%7D%2C%22another%22%3A%7B%22target%22%3A%22C7%22%2C%22id%22%3A%22another%22%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C4%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C4%22%7D%2C%22C5%22%3A%7B%22parents%22%3A%5B%22C4%22%5D%2C%22id%22%3A%22C5%22%7D%2C%22C6%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C6%22%7D%2C%22C7%22%3A%7B%22parents%22%3A%5B%22C6%22%5D%2C%22id%22%3A%22C7%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C3%27%22%7D%2C%22C4%27%22%3A%7B%22parents%22%3A%5B%22C3%27%22%5D%2C%22id%22%3A%22C4%27%22%7D%2C%22C7%27%22%3A%7B%22parents%22%3A%5B%22C4%27%22%5D%2C%22id%22%3A%22C7%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22main%22%2C%22id%22%3A%22HEAD%22%7D%7D",
  "solutionCommand": "git cherry-pick C3 C4 C7",
-  "compareOnlyMasterHashAgnostic": true,
+  "compareOnlyMainHashAgnostic": true,
  "disabledMap": {
    "git rebase": true
  },
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\"},\"bugFix\":{\"target\":\"C3\",\"id\":\"bugFix\"},\"side\":{\"target\":\"C5\",\"id\":\"side\"},\"another\":{\"target\":\"C7\",\"id\":\"another\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C1\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C4\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C1\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\"},\"bugFix\":{\"target\":\"C3\",\"id\":\"bugFix\"},\"side\":{\"target\":\"C5\",\"id\":\"side\"},\"another\":{\"target\":\"C7\",\"id\":\"another\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C1\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C4\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C1\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}",
  "name": {
    "fr_FR": "Introduction à cherry-pick",
    "en_US": "Cherry-pick Intro",
@ -607,7 +607,7 @@ exports.level = {
          "type": "ModalAlert",
          "options": {
            "markdowns": [
-              "このレベルをクリアするには、３つのブランチからmasterにコードをコピーしてください。どのコミットを取得するかについてはゴールのツリーをみてください。",
+              "このレベルをクリアするには、３つのブランチからmainにコードをコピーしてください。どのコミットを取得するかについてはゴールのツリーをみてください。",
              ""
            ]
          }
--- a/src/levels/rampup/detachedHead.js
+++ b/src/levels/rampup/detachedHead.js
@ -1,7 +1,7 @@
 exports.level = {
-  "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\"},\"bugFix\":{\"target\":\"C4\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"}},\"HEAD\":{\"target\":\"C4\",\"id\":\"HEAD\"}}",
+  "goalTreeString": "{\"branches\":{\"main\":{\"target\":\"C2\",\"id\":\"main\"},\"bugFix\":{\"target\":\"C4\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"}},\"HEAD\":{\"target\":\"C4\",\"id\":\"HEAD\"}}",
  "solutionCommand": "git checkout C4",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\"},\"bugFix\":{\"target\":\"C4\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"}},\"HEAD\":{\"target\":\"bugFix\",\"id\":\"HEAD\"}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C2\",\"id\":\"main\"},\"bugFix\":{\"target\":\"C4\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"}},\"HEAD\":{\"target\":\"bugFix\",\"id\":\"HEAD\"}}",
  "name": {
    "en_US": "Detach yo' HEAD",
    "es_AR": "Desatacheá tu HEAD",
--- a/src/levels/rampup/interactiveRebase.js
+++ b/src/levels/rampup/interactiveRebase.js
@ -1,11 +1,11 @@
 exports.level = {
-  "goalTreeString": "%7B%22branches%22%3A%7B%22master%22%3A%7B%22target%22%3A%22C4%27%22%2C%22id%22%3A%22master%22%7D%2C%22overHere%22%3A%7B%22target%22%3A%22C1%22%2C%22id%22%3A%22overHere%22%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C4%22%3A%7B%22parents%22%3A%5B%22C3%22%5D%2C%22id%22%3A%22C4%22%7D%2C%22C5%22%3A%7B%22parents%22%3A%5B%22C4%22%5D%2C%22id%22%3A%22C5%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C3%27%22%7D%2C%22C5%27%22%3A%7B%22parents%22%3A%5B%22C3%27%22%5D%2C%22id%22%3A%22C5%27%22%7D%2C%22C4%27%22%3A%7B%22parents%22%3A%5B%22C5%27%22%5D%2C%22id%22%3A%22C4%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22master%22%2C%22id%22%3A%22HEAD%22%7D%7D",
+  "goalTreeString": "%7B%22branches%22%3A%7B%22main%22%3A%7B%22target%22%3A%22C4%27%22%2C%22id%22%3A%22main%22%7D%2C%22overHere%22%3A%7B%22target%22%3A%22C1%22%2C%22id%22%3A%22overHere%22%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C4%22%3A%7B%22parents%22%3A%5B%22C3%22%5D%2C%22id%22%3A%22C4%22%7D%2C%22C5%22%3A%7B%22parents%22%3A%5B%22C4%22%5D%2C%22id%22%3A%22C5%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C3%27%22%7D%2C%22C5%27%22%3A%7B%22parents%22%3A%5B%22C3%27%22%5D%2C%22id%22%3A%22C5%27%22%7D%2C%22C4%27%22%3A%7B%22parents%22%3A%5B%22C5%27%22%5D%2C%22id%22%3A%22C4%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22main%22%2C%22id%22%3A%22HEAD%22%7D%7D",
  "solutionCommand": "git rebase -i overHere --solution-ordering C3,C5,C4",
-  "compareOnlyMasterHashAgnostic": true,
+  "compareOnlyMainHashAgnostic": true,
  "disabledMap": {
    "git cherry-pick": true
  },
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C5\",\"id\":\"master\"},\"overHere\":{\"target\":\"C1\",\"id\":\"overHere\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C4\"],\"id\":\"C5\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C5\",\"id\":\"main\"},\"overHere\":{\"target\":\"C1\",\"id\":\"overHere\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C4\"],\"id\":\"C5\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}",
  "hint": {
    "en_US": "you can use either branches or relative refs (HEAD~) to specify the rebase target",
    "es_AR": "podés usar tanto ramas como referencias relativas (HEAD~) para especificar el objetivo del rebase",
--- a/src/levels/rampup/relativeRefs.js
+++ b/src/levels/rampup/relativeRefs.js
@ -1,7 +1,7 @@
 exports.level = {
-  "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\"},\"bugFix\":{\"target\":\"C4\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"}},\"HEAD\":{\"target\":\"C3\",\"id\":\"HEAD\"}}",
+  "goalTreeString": "{\"branches\":{\"main\":{\"target\":\"C2\",\"id\":\"main\"},\"bugFix\":{\"target\":\"C4\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"}},\"HEAD\":{\"target\":\"C3\",\"id\":\"HEAD\"}}",
  "solutionCommand": "git checkout bugFix^",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\"},\"bugFix\":{\"target\":\"C4\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C2\",\"id\":\"main\"},\"bugFix\":{\"target\":\"C4\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}",
  "name": {
    "en_US": "Relative Refs (^)",
    "fr_FR": "Références relatives (^)",
@ -682,7 +682,7 @@ exports.level = {
              "",
              " `main^^` 是 `main` 的 grandparent commit（往前推兩代）",
              "",
-              "切換到 master的 parent commit"
+              "切換到 main的 parent commit"
            ],
            "afterMarkdowns": [
              "看吧！完成了。這種方式比輸入代表 commit 的 hash 值簡單多了！"
@ -757,7 +757,7 @@ exports.level = {
              "",
              "そして`main^^`とはその親の一つの上のコミット(２代前の親)を指します。",
              "",
-              "masterの上のコミットをここで見てみましょう"
+              "mainの上のコミットをここで見てみましょう"
            ],
            "afterMarkdowns": [
              "やりました！コミットハッシュを書くよりずっと簡単ですね。"
--- a/src/levels/rampup/relativeRefs2.js
+++ b/src/levels/rampup/relativeRefs2.js
@ -1,7 +1,7 @@
 exports.level = {
-  "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C6\",\"id\":\"master\"},\"bugFix\":{\"target\":\"C0\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C2\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C3\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"}},\"HEAD\":{\"target\":\"C1\",\"id\":\"HEAD\"}}",
+  "goalTreeString": "{\"branches\":{\"main\":{\"target\":\"C6\",\"id\":\"main\"},\"bugFix\":{\"target\":\"C0\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C2\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C3\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"}},\"HEAD\":{\"target\":\"C1\",\"id\":\"HEAD\"}}",
  "solutionCommand": "git branch -f main C6;git checkout HEAD~1;git branch -f bugFix HEAD~1",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C4\",\"id\":\"master\"},\"bugFix\":{\"target\":\"C5\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C2\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C3\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"}},\"HEAD\":{\"target\":\"C2\",\"id\":\"HEAD\"}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C4\",\"id\":\"main\"},\"bugFix\":{\"target\":\"C5\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C2\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C3\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"}},\"HEAD\":{\"target\":\"C2\",\"id\":\"HEAD\"}}",
  "hint": {
    "en_US": "You'll need to use at least one direct reference (hash) to complete this level",
    "fr_FR": "Vous aurez besoin d'utiliser au moins une référence directe (hash) pour compléter ce niveau.",
@ -687,7 +687,7 @@ exports.level = {
              "",
              "`git branch -f main HEAD~3`",
              "",
-              "masterブランチを（強制的に）HEADより親三代前へと移動します。"
+              "mainブランチを（強制的に）HEADより親三代前へと移動します。"
            ]
          }
        },
--- a/src/levels/rampup/reversingChanges.js
+++ b/src/levels/rampup/reversingChanges.js
@ -1,8 +1,8 @@
 exports.level = {
-  "goalTreeString": "%7B%22branches%22%3A%7B%22master%22%3A%7B%22target%22%3A%22C1%22%2C%22id%22%3A%22master%22%7D%2C%22pushed%22%3A%7B%22target%22%3A%22C2%27%22%2C%22id%22%3A%22pushed%22%7D%2C%22local%22%3A%7B%22target%22%3A%22C1%22%2C%22id%22%3A%22local%22%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C2%27%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C2%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22pushed%22%2C%22id%22%3A%22HEAD%22%7D%7D",
+  "goalTreeString": "%7B%22branches%22%3A%7B%22main%22%3A%7B%22target%22%3A%22C1%22%2C%22id%22%3A%22main%22%7D%2C%22pushed%22%3A%7B%22target%22%3A%22C2%27%22%2C%22id%22%3A%22pushed%22%7D%2C%22local%22%3A%7B%22target%22%3A%22C1%22%2C%22id%22%3A%22local%22%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C2%27%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C2%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22pushed%22%2C%22id%22%3A%22HEAD%22%7D%7D",
  "solutionCommand": "git reset HEAD~1;git checkout pushed;git revert HEAD",
  "compareOnlyBranches": true,
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\"},\"pushed\":{\"target\":\"C2\",\"id\":\"pushed\"},\"local\":{\"target\":\"C3\",\"id\":\"local\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"local\",\"id\":\"HEAD\"}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\"},\"pushed\":{\"target\":\"C2\",\"id\":\"pushed\"},\"local\":{\"target\":\"C3\",\"id\":\"local\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"local\",\"id\":\"HEAD\"}}",
  "name": {
    "en_US": "Reversing Changes in Git",
    "de_DE": "Änderungen in Git rückgängig machen",
@ -446,7 +446,7 @@ exports.level = {
              "どういう感じか見てみましょう。"
            ],
            "afterMarkdowns": [
-              "いいですね！Gitは単純にmasterブランチへのポインタを`C1`へ戻しました。これでこのローカルリポジトリにはまるで`C2`なんて無かったかのように変更をキャンセルできました。"
+              "いいですね！Gitは単純にmainブランチへのポインタを`C1`へ戻しました。これでこのローカルリポジトリにはまるで`C2`なんて無かったかのように変更をキャンセルできました。"
            ],
            "command": "git reset HEAD~1",
            "beforeCommand": "git commit"
--- a/src/levels/rebase/manyRebases.js
+++ b/src/levels/rebase/manyRebases.js
@ -1,12 +1,12 @@
 exports.level = {
-  "compareOnlyMasterHashAgnostic": true,
+  "compareOnlyMainHashAgnostic": true,
  "disabledMap": {
    "git revert": true,
    "git cherry-pick": true
  },
-  "goalTreeString": "%7B%22branches%22%3A%7B%22master%22%3A%7B%22target%22%3A%22C7%27%22%2C%22id%22%3A%22master%22%7D%2C%22bugFix%22%3A%7B%22target%22%3A%22C3%27%22%2C%22id%22%3A%22bugFix%22%7D%2C%22side%22%3A%7B%22target%22%3A%22C6%27%22%2C%22id%22%3A%22side%22%7D%2C%22another%22%3A%7B%22target%22%3A%22C7%27%22%2C%22id%22%3A%22another%22%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C4%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C4%22%7D%2C%22C5%22%3A%7B%22parents%22%3A%5B%22C4%22%5D%2C%22id%22%3A%22C5%22%7D%2C%22C6%22%3A%7B%22parents%22%3A%5B%22C5%22%5D%2C%22id%22%3A%22C6%22%7D%2C%22C7%22%3A%7B%22parents%22%3A%5B%22C5%22%5D%2C%22id%22%3A%22C7%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C3%27%22%7D%2C%22C4%27%22%3A%7B%22parents%22%3A%5B%22C3%27%22%5D%2C%22id%22%3A%22C4%27%22%7D%2C%22C5%27%22%3A%7B%22parents%22%3A%5B%22C4%27%22%5D%2C%22id%22%3A%22C5%27%22%7D%2C%22C6%27%22%3A%7B%22parents%22%3A%5B%22C5%27%22%5D%2C%22id%22%3A%22C6%27%22%7D%2C%22C7%27%22%3A%7B%22parents%22%3A%5B%22C6%27%22%5D%2C%22id%22%3A%22C7%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22master%22%2C%22id%22%3A%22HEAD%22%7D%7D",
+  "goalTreeString": "%7B%22branches%22%3A%7B%22main%22%3A%7B%22target%22%3A%22C7%27%22%2C%22id%22%3A%22main%22%7D%2C%22bugFix%22%3A%7B%22target%22%3A%22C3%27%22%2C%22id%22%3A%22bugFix%22%7D%2C%22side%22%3A%7B%22target%22%3A%22C6%27%22%2C%22id%22%3A%22side%22%7D%2C%22another%22%3A%7B%22target%22%3A%22C7%27%22%2C%22id%22%3A%22another%22%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C4%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C4%22%7D%2C%22C5%22%3A%7B%22parents%22%3A%5B%22C4%22%5D%2C%22id%22%3A%22C5%22%7D%2C%22C6%22%3A%7B%22parents%22%3A%5B%22C5%22%5D%2C%22id%22%3A%22C6%22%7D%2C%22C7%22%3A%7B%22parents%22%3A%5B%22C5%22%5D%2C%22id%22%3A%22C7%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C3%27%22%7D%2C%22C4%27%22%3A%7B%22parents%22%3A%5B%22C3%27%22%5D%2C%22id%22%3A%22C4%27%22%7D%2C%22C5%27%22%3A%7B%22parents%22%3A%5B%22C4%27%22%5D%2C%22id%22%3A%22C5%27%22%7D%2C%22C6%27%22%3A%7B%22parents%22%3A%5B%22C5%27%22%5D%2C%22id%22%3A%22C6%27%22%7D%2C%22C7%27%22%3A%7B%22parents%22%3A%5B%22C6%27%22%5D%2C%22id%22%3A%22C7%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22main%22%2C%22id%22%3A%22HEAD%22%7D%7D",
  "solutionCommand": "git rebase main bugFix;git rebase bugFix side;git rebase side another;git rebase another main",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\"},\"bugFix\":{\"target\":\"C3\",\"id\":\"bugFix\"},\"side\":{\"target\":\"C6\",\"id\":\"side\"},\"another\":{\"target\":\"C7\",\"id\":\"another\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C0\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C4\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C5\"],\"id\":\"C7\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C2\",\"id\":\"main\"},\"bugFix\":{\"target\":\"C3\",\"id\":\"bugFix\"},\"side\":{\"target\":\"C6\",\"id\":\"side\"},\"another\":{\"target\":\"C7\",\"id\":\"another\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C0\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C4\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C5\"],\"id\":\"C7\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}",
  "name": {
    "en_US": "Rebasing over 9000 times",
    "de_DE": "10000 Rebases unter dem `HEAD`",
@ -34,7 +34,7 @@ exports.level = {
    "pt_BR": "Lembre-se, a forma mais eficiente pode ser atualizar o main por último...",
    "gl"   : "Lembra, a forma máis eficiente pode ser actualizar a rama main ó final...",
    "fr_FR": "Rappelez-vous, la façon la plus efficace peut être de mettre à jour main seulement à la fin ...",
-    "ja"   : "最も効率的なやり方はmasterを最後に更新するだけかもしれない・・・",
+    "ja"   : "最も効率的なやり方はmainを最後に更新するだけかもしれない・・・",
    "ko": "아마도 main을 마지막에 업데이트하는 것이 가장 효율적인 방법일 것입니다...",
    "zh_CN": "记住，最后更新 main 分支可能是最高效的方法……",
    "zh_TW": "要記住喔! 把 main branch 留到最後更新可能是最有效率的方法。",
@ -181,7 +181,7 @@ exports.level = {
            "markdowns": [
              "### 複数のブランチをリベースする",
              "",
-              "さあ、いくつものブランチが出てきます。このブランチたち全てをmasterブランチにリベースしましょう。",
+              "さあ、いくつものブランチが出てきます。このブランチたち全てをmainブランチにリベースしましょう。",
              "",
              "おエライさん方が今回の仕事を少しトリッキーにしてくれました -- コミットはすべて一列の連続した状態にしてほしいそうです。つまり私たちが作るリポジトリの最終的なツリーの状態は、`C7'`が最後に来て、`C6'`がその一つ上に来て、、と順に積み重なるイメージです。",
              "",
--- a/src/levels/rebase/selectiveRebase.js
+++ b/src/levels/rebase/selectiveRebase.js
@ -3,9 +3,9 @@ exports.level = {
  "disabledMap": {
    "git revert": true
  },
-  "goalTreeString": "%7B%22branches%22%3A%7B%22master%22%3A%7B%22target%22%3A%22C5%22%2C%22id%22%3A%22master%22%7D%2C%22one%22%3A%7B%22target%22%3A%22C2%27%22%2C%22id%22%3A%22one%22%7D%2C%22two%22%3A%7B%22target%22%3A%22C2%27%27%22%2C%22id%22%3A%22two%22%7D%2C%22three%22%3A%7B%22target%22%3A%22C2%22%2C%22id%22%3A%22three%22%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C4%22%3A%7B%22parents%22%3A%5B%22C3%22%5D%2C%22id%22%3A%22C4%22%7D%2C%22C5%22%3A%7B%22parents%22%3A%5B%22C4%22%5D%2C%22id%22%3A%22C5%22%7D%2C%22C4%27%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C4%27%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C4%27%22%5D%2C%22id%22%3A%22C3%27%22%7D%2C%22C2%27%22%3A%7B%22parents%22%3A%5B%22C3%27%22%5D%2C%22id%22%3A%22C2%27%22%7D%2C%22C5%27%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C5%27%22%7D%2C%22C4%27%27%22%3A%7B%22parents%22%3A%5B%22C5%27%22%5D%2C%22id%22%3A%22C4%27%27%22%7D%2C%22C3%27%27%22%3A%7B%22parents%22%3A%5B%22C4%27%27%22%5D%2C%22id%22%3A%22C3%27%27%22%7D%2C%22C2%27%27%22%3A%7B%22parents%22%3A%5B%22C3%27%27%22%5D%2C%22id%22%3A%22C2%27%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22two%22%2C%22id%22%3A%22HEAD%22%7D%7D",
+  "goalTreeString": "%7B%22branches%22%3A%7B%22main%22%3A%7B%22target%22%3A%22C5%22%2C%22id%22%3A%22main%22%7D%2C%22one%22%3A%7B%22target%22%3A%22C2%27%22%2C%22id%22%3A%22one%22%7D%2C%22two%22%3A%7B%22target%22%3A%22C2%27%27%22%2C%22id%22%3A%22two%22%7D%2C%22three%22%3A%7B%22target%22%3A%22C2%22%2C%22id%22%3A%22three%22%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C4%22%3A%7B%22parents%22%3A%5B%22C3%22%5D%2C%22id%22%3A%22C4%22%7D%2C%22C5%22%3A%7B%22parents%22%3A%5B%22C4%22%5D%2C%22id%22%3A%22C5%22%7D%2C%22C4%27%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C4%27%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C4%27%22%5D%2C%22id%22%3A%22C3%27%22%7D%2C%22C2%27%22%3A%7B%22parents%22%3A%5B%22C3%27%22%5D%2C%22id%22%3A%22C2%27%22%7D%2C%22C5%27%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C5%27%22%7D%2C%22C4%27%27%22%3A%7B%22parents%22%3A%5B%22C5%27%22%5D%2C%22id%22%3A%22C4%27%27%22%7D%2C%22C3%27%27%22%3A%7B%22parents%22%3A%5B%22C4%27%27%22%5D%2C%22id%22%3A%22C3%27%27%22%7D%2C%22C2%27%27%22%3A%7B%22parents%22%3A%5B%22C3%27%27%22%5D%2C%22id%22%3A%22C2%27%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22two%22%2C%22id%22%3A%22HEAD%22%7D%7D",
  "solutionCommand": "git checkout one; git cherry-pick C4 C3 C2; git checkout two; git cherry-pick C5 C4 C3 C2; git branch -f three C2",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C5\",\"id\":\"master\"},\"one\":{\"target\":\"C1\",\"id\":\"one\"},\"two\":{\"target\":\"C1\",\"id\":\"two\"},\"three\":{\"target\":\"C1\",\"id\":\"three\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C4\"],\"id\":\"C5\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C5\",\"id\":\"main\"},\"one\":{\"target\":\"C1\",\"id\":\"one\"},\"two\":{\"target\":\"C1\",\"id\":\"two\"},\"three\":{\"target\":\"C1\",\"id\":\"three\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C4\"],\"id\":\"C5\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}",
  "name": {
    "ko": "브랜치 스파게티",
    "en_US": "Branch Spaghetti",
@ -195,7 +195,7 @@ exports.level = {
              "",
              "なんということでしょう。今回のレベルクリアのために、やることがたくさんあります。",
              "",
-              "いま`main`が指しているコミットの数個前のコミットに、ブランチ`one`、`two`それから`three`があります。何か事情があって、これらの3つのブランチをmasterが指している最新の状態に更新したいケースを考えます。",
+              "いま`main`が指しているコミットの数個前のコミットに、ブランチ`one`、`two`それから`three`があります。何か事情があって、これらの3つのブランチをmainが指している最新の状態に更新したいケースを考えます。",
              "",
              "ブランチ`one`に対しては、順序の変更と`C5`の削除が必要です。`two`では順序の変更のみ、`three`に対しては1回だけコミットすればOKです。",
              "",
--- a/src/levels/remote/clone.js
+++ b/src/levels/remote/clone.js
@ -1,5 +1,5 @@
 exports.level = {
-  "goalTreeString": '{"branches":{"master":{"target":"C1","id":"master","remoteTrackingBranchID":"o/master"},"o/master":{"target":"C1","id":"o/master","remoteTrackingBranchID":null}},"commits":{"C0":{"parents":[],"id":"C0","rootCommit":true},"C1":{"parents":["C0"],"id":"C1"}},"HEAD":{"target":"master","id":"HEAD"},"originTree":{"branches":{"master":{"target":"C1","id":"master","remoteTrackingBranchID":null}},"commits":{"C0":{"parents":[],"id":"C0","rootCommit":true},"C1":{"parents":["C0"],"id":"C1"}},"HEAD":{"target":"master","id":"HEAD"}}}',
+  "goalTreeString": '{"branches":{"main":{"target":"C1","id":"main","remoteTrackingBranchID":"o/main"},"o/main":{"target":"C1","id":"o/main","remoteTrackingBranchID":null}},"commits":{"C0":{"parents":[],"id":"C0","rootCommit":true},"C1":{"parents":["C0"],"id":"C1"}},"HEAD":{"target":"main","id":"HEAD"},"originTree":{"branches":{"main":{"target":"C1","id":"main","remoteTrackingBranchID":null}},"commits":{"C0":{"parents":[],"id":"C0","rootCommit":true},"C1":{"parents":["C0"],"id":"C1"}},"HEAD":{"target":"main","id":"HEAD"}}}',
  "solutionCommand": "git clone",
  "name": {
    "en_US": "Clone Intro",
--- a/src/levels/remote/fakeTeamwork.js
+++ b/src/levels/remote/fakeTeamwork.js
@ -1,7 +1,7 @@
 exports.level = {
-  "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C5\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\",\"localBranchesThatTrackThis\":null},\"o/master\":{\"target\":\"C3\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":[\"master\"]}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C4\":{\"parents\":[\"C1\"],\"id\":\"C4\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"},\"C5\":{\"parents\":[\"C3\",\"C4\"],\"id\":\"C5\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C3\",\"id\":\"master\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}}",
+  "goalTreeString": "{\"branches\":{\"main\":{\"target\":\"C5\",\"id\":\"main\",\"remoteTrackingBranchID\":\"o/main\",\"localBranchesThatTrackThis\":null},\"o/main\":{\"target\":\"C3\",\"id\":\"o/main\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":[\"main\"]}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C4\":{\"parents\":[\"C1\"],\"id\":\"C4\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"},\"C5\":{\"parents\":[\"C3\",\"C4\"],\"id\":\"C5\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C3\",\"id\":\"main\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}}",
  "solutionCommand": "git clone;git fakeTeamwork 2;git commit ;git pull",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}",
  "name": {
    "en_US": "Faking Teamwork",
    "fr_FR": "Simulation du travail d'équipe",
@ -599,7 +599,7 @@ exports.level = {
          "type": "GitDemonstrationView",
          "options": {
            "beforeMarkdowns": [
-              "`fakeTeamwork`のデフォルトの動作は、単にmasterの上にコミットを乗っけるだけです"
+              "`fakeTeamwork`のデフォルトの動作は、単にmainの上にコミットを乗っけるだけです"
            ],
            "afterMarkdowns": [
              "ではいってみましょう -- リモートには新しいコミットが更新され、それはまだ私たちの手元にはダウンロードされていません。なぜなら、`git fetch`を走らせていませんからね。"
@ -707,7 +707,7 @@ exports.level = {
          "type": "GitDemonstrationView",
          "options": {
            "beforeMarkdowns": [
-              "`fakeTeamwork`의 기본 행동은 원격 master에 간단히 하나의 커밋을 하는것 입니다."
+              "`fakeTeamwork`의 기본 행동은 원격 main에 간단히 하나의 커밋을 하는것 입니다."
            ],
            "afterMarkdowns": [
              "자 됬습니다 -- 원격 저장소에 새로운 커밋이 갱신되었습니다. 아직 `git fetch`를 하지 않았기 때문에 로컬로 내려받아지지는 않았습니다."
--- a/src/levels/remote/fetch.js
+++ b/src/levels/remote/fetch.js
@ -1,7 +1,7 @@
 exports.level = {
-  "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\"},\"bugFix\":{\"target\":\"C3\",\"id\":\"bugFix\"},\"o/master\":{\"target\":\"C5\",\"id\":\"o/master\"},\"o/bugFix\":{\"target\":\"C7\",\"id\":\"o/bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C2\"],\"id\":\"C4\"},\"C6\":{\"parents\":[\"C3\"],\"id\":\"C6\"},\"C5\":{\"parents\":[\"C4\"],\"id\":\"C5\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"}},\"HEAD\":{\"target\":\"bugFix\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C5\",\"id\":\"master\"},\"bugFix\":{\"target\":\"C7\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C2\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C4\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C3\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"}},\"HEAD\":{\"target\":\"bugFix\",\"id\":\"HEAD\"}}}",
+  "goalTreeString": "{\"branches\":{\"main\":{\"target\":\"C2\",\"id\":\"main\"},\"bugFix\":{\"target\":\"C3\",\"id\":\"bugFix\"},\"o/main\":{\"target\":\"C5\",\"id\":\"o/main\"},\"o/bugFix\":{\"target\":\"C7\",\"id\":\"o/bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C2\"],\"id\":\"C4\"},\"C6\":{\"parents\":[\"C3\"],\"id\":\"C6\"},\"C5\":{\"parents\":[\"C4\"],\"id\":\"C5\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"}},\"HEAD\":{\"target\":\"bugFix\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C5\",\"id\":\"main\"},\"bugFix\":{\"target\":\"C7\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C2\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C4\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C3\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"}},\"HEAD\":{\"target\":\"bugFix\",\"id\":\"HEAD\"}}}",
  "solutionCommand": "git fetch",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\"},\"bugFix\":{\"target\":\"C3\",\"id\":\"bugFix\"},\"o/master\":{\"target\":\"C2\",\"id\":\"o/master\"},\"o/bugFix\":{\"target\":\"C3\",\"id\":\"o/bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"bugFix\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C5\",\"id\":\"master\"},\"bugFix\":{\"target\":\"C7\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C2\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C4\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C3\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"}},\"HEAD\":{\"target\":\"bugFix\",\"id\":\"HEAD\"}}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C2\",\"id\":\"main\"},\"bugFix\":{\"target\":\"C3\",\"id\":\"bugFix\"},\"o/main\":{\"target\":\"C2\",\"id\":\"o/main\"},\"o/bugFix\":{\"target\":\"C3\",\"id\":\"o/bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"bugFix\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C5\",\"id\":\"main\"},\"bugFix\":{\"target\":\"C7\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C2\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C4\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C3\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"}},\"HEAD\":{\"target\":\"bugFix\",\"id\":\"HEAD\"}}}",
  "name": {
    "en_US": "Git Fetchin'",
    "fr_FR": "Git fetch",
--- a/src/levels/remote/fetchArgs.js
+++ b/src/levels/remote/fetchArgs.js
@ -1,7 +1,7 @@
 exports.level = {
-  "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C6\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\"},\"foo\":{\"target\":\"C7\",\"id\":\"foo\",\"remoteTrackingBranchID\":\"o/foo\"},\"o/master\":{\"target\":\"C1\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null},\"o/foo\":{\"target\":\"C1\",\"id\":\"o/foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"},\"C5\":{\"parents\":[\"C1\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C3\",\"C6\"],\"id\":\"C7\"}},\"HEAD\":{\"target\":\"foo\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C4\",\"id\":\"master\",\"remoteTrackingBranchID\":null},\"foo\":{\"target\":\"C6\",\"id\":\"foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C1\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"}},\"HEAD\":{\"target\":\"foo\",\"id\":\"HEAD\"}}}",
+  "goalTreeString": "{\"branches\":{\"main\":{\"target\":\"C6\",\"id\":\"main\",\"remoteTrackingBranchID\":\"o/main\"},\"foo\":{\"target\":\"C7\",\"id\":\"foo\",\"remoteTrackingBranchID\":\"o/foo\"},\"o/main\":{\"target\":\"C1\",\"id\":\"o/main\",\"remoteTrackingBranchID\":null},\"o/foo\":{\"target\":\"C1\",\"id\":\"o/foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"},\"C5\":{\"parents\":[\"C1\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C3\",\"C6\"],\"id\":\"C7\"}},\"HEAD\":{\"target\":\"foo\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C4\",\"id\":\"main\",\"remoteTrackingBranchID\":null},\"foo\":{\"target\":\"C6\",\"id\":\"foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C1\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"}},\"HEAD\":{\"target\":\"foo\",\"id\":\"HEAD\"}}}",
  "solutionCommand": "git fetch origin main~1:foo;git fetch origin foo:main;git checkout foo;git merge main",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\"},\"foo\":{\"target\":\"C1\",\"id\":\"foo\",\"remoteTrackingBranchID\":\"o/foo\"},\"o/master\":{\"target\":\"C1\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null},\"o/foo\":{\"target\":\"C1\",\"id\":\"o/foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"C1\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C4\",\"id\":\"master\",\"remoteTrackingBranchID\":null},\"foo\":{\"target\":\"C6\",\"id\":\"foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C1\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"}},\"HEAD\":{\"target\":\"foo\",\"id\":\"HEAD\"}}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\",\"remoteTrackingBranchID\":\"o/main\"},\"foo\":{\"target\":\"C1\",\"id\":\"foo\",\"remoteTrackingBranchID\":\"o/foo\"},\"o/main\":{\"target\":\"C1\",\"id\":\"o/main\",\"remoteTrackingBranchID\":null},\"o/foo\":{\"target\":\"C1\",\"id\":\"o/foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"C1\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C4\",\"id\":\"main\",\"remoteTrackingBranchID\":null},\"foo\":{\"target\":\"C6\",\"id\":\"foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C1\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"}},\"HEAD\":{\"target\":\"foo\",\"id\":\"HEAD\"}}}",
  "name": {
    "en_US": "Fetch arguments",
    "fr_FR": "Arguments de fetch",
--- a/src/levels/remote/fetchRebase.js
+++ b/src/levels/remote/fetchRebase.js
@ -1,7 +1,7 @@
 exports.level = {
-  "goalTreeString": "%7B%22branches%22%3A%7B%22master%22%3A%7B%22target%22%3A%22C3%27%22%2C%22id%22%3A%22master%22%2C%22remoteTrackingBranchID%22%3A%22o/master%22%2C%22localBranchesThatTrackThis%22%3Anull%7D%2C%22o/master%22%3A%7B%22target%22%3A%22C3%27%22%2C%22id%22%3A%22o/master%22%2C%22remoteTrackingBranchID%22%3Anull%2C%22localBranchesThatTrackThis%22%3A%5B%22master%22%5D%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C3%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22master%22%2C%22id%22%3A%22HEAD%22%7D%2C%22originTree%22%3A%7B%22branches%22%3A%7B%22master%22%3A%7B%22target%22%3A%22C3%27%22%2C%22id%22%3A%22master%22%2C%22remoteTrackingBranchID%22%3Anull%2C%22localBranchesThatTrackThis%22%3Anull%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C3%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22master%22%2C%22id%22%3A%22HEAD%22%7D%7D%7D",
+  "goalTreeString": "%7B%22branches%22%3A%7B%22main%22%3A%7B%22target%22%3A%22C3%27%22%2C%22id%22%3A%22main%22%2C%22remoteTrackingBranchID%22%3A%22o/main%22%2C%22localBranchesThatTrackThis%22%3Anull%7D%2C%22o/main%22%3A%7B%22target%22%3A%22C3%27%22%2C%22id%22%3A%22o/main%22%2C%22remoteTrackingBranchID%22%3Anull%2C%22localBranchesThatTrackThis%22%3A%5B%22main%22%5D%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C3%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22main%22%2C%22id%22%3A%22HEAD%22%7D%2C%22originTree%22%3A%7B%22branches%22%3A%7B%22main%22%3A%7B%22target%22%3A%22C3%27%22%2C%22id%22%3A%22main%22%2C%22remoteTrackingBranchID%22%3Anull%2C%22localBranchesThatTrackThis%22%3Anull%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C3%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22main%22%2C%22id%22%3A%22HEAD%22%7D%7D%7D",
  "solutionCommand": "git clone;git fakeTeamwork;git commit;git pull --rebase;git push",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}",
  "name": {
    "en_US": "Diverged History",
    "zh_CN": "偏离的提交历史",
--- a/src/levels/remote/lockedMaster.js
+++ b/src/levels/remote/lockedMaster.js
@ -1,13 +1,13 @@
 exports.level = {
-  "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\"},\"o/master\":{\"target\":\"C1\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null},\"feature\":{\"target\":\"C2\",\"id\":\"feature\",\"remoteTrackingBranchID\":\"o/feature\"},\"o/feature\":{\"target\":\"C2\",\"id\":\"o/feature\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"}},\"tags\":{},\"HEAD\":{\"target\":\"feature\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\",\"remoteTrackingBranchID\":null},\"feature\":{\"target\":\"C2\",\"id\":\"feature\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"}},\"tags\":{},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}}",
+  "goalTreeString": "{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\",\"remoteTrackingBranchID\":\"o/main\"},\"o/main\":{\"target\":\"C1\",\"id\":\"o/main\",\"remoteTrackingBranchID\":null},\"feature\":{\"target\":\"C2\",\"id\":\"feature\",\"remoteTrackingBranchID\":\"o/feature\"},\"o/feature\":{\"target\":\"C2\",\"id\":\"o/feature\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"}},\"tags\":{},\"HEAD\":{\"target\":\"feature\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\",\"remoteTrackingBranchID\":null},\"feature\":{\"target\":\"C2\",\"id\":\"feature\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"}},\"tags\":{},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}}",
  "solutionCommand": "git reset --hard o/main;git checkout -b feature C2; git push origin feature",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\"},\"o/master\":{\"target\":\"C1\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"}},\"tags\":{},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"tags\":{},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C2\",\"id\":\"main\",\"remoteTrackingBranchID\":\"o/main\"},\"o/main\":{\"target\":\"C1\",\"id\":\"o/main\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"}},\"tags\":{},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"tags\":{},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}}",
  "hint": {
    "en_US": "Make the feature branch from the local main before resetting it back to be the same as origin's main",
-    "de_DE": "Erstelle einen Feature-Branch ausgehend vom lokalen Master-Branch, bevor du den Master-Branch auf den origin/main zurücksetzt.",
+    "de_DE": "Erstelle einen Feature-Branch ausgehend vom lokalen Main-Branch, bevor du den Main-Branch auf den origin/main zurücksetzt.",
    "ru_RU": "Создайте новую feature ветвь от main перед тем, как откатить изменения в main до состояния o/main.",
    "uk": "Створіть нову feature гілку від локального main перед тим, як відкотити зміни в main до стану o/main.",
-    "zh_CN": "从本地的master创建一个feature分支, 然后重置master和origin master保持一致。",
+    "zh_CN": "从本地的main创建一个feature分支, 然后重置main和origin main保持一致。",
    "es_ES": "Crea la rama feature desde la rama main en local antes de restablecerlo para que sea el mismo que la rama main de origen",
    "pt_BR": "Crie o ramo feature a partir do ramo main no local antes de reestabelecê-lo para que seja o mesmo que o ramo main de origem",
    "fr_FR": "Créer la branche feature à partir du main local, avant de la restaurer dans le même état que o/main",
@ -17,18 +17,18 @@ exports.level = {
    "ja": "mainブランチをoriginのmainと同じ状態になるようにリセットする前に、ローカルのmainからfeatureブランチを作成します。"
  },
  "name": {
-    "en_US": "Locked Master",
-    "de_DE": "Gesperrter Master-Branch",
+    "en_US": "Locked Main",
+    "de_DE": "Gesperrter Main-Branch",
    "ru_RU": "Заблокированная ветвь main",
    "uk": "Заблокована гілка main",
-    "zh_CN": "锁定的Master(Locked Master)",
-    "es_ES": "Master bloqueado",
-    "pt_BR": "Master bloqueado",
-    "fr_FR": "Master verrouillé",
+    "zh_CN": "锁定的Main(Locked Main)",
+    "es_ES": "Main bloqueado",
+    "pt_BR": "Main bloqueado",
+    "fr_FR": "Main verrouillé",
    "ko"   : "잠겨버린 main 브랜치",
-    "sl_SI": "Zaklenjen Master",
-    "es_AR": "Master bloqueado",
-    "ja": "ロックされたmaster"
+    "sl_SI": "Zaklenjen Main",
+    "es_AR": "Main bloqueado",
+    "ja": "ロックされたmain"
  },
  "startDialog": {
    "en_US": {
@ -77,9 +77,9 @@ exports.level = {
          "type": "ModalAlert",
          "options": {
            "markdowns": [
-              "## Gesperrter Master-Branch",
+              "## Gesperrter Main-Branch",
              "",
-              "Wenn du in einem großen Team zusammen arbeitest, ist der Master-Branch mit hoher Wahrscheinlichkeit für direkte Änderungen gesperrt. Um Änderungen am Remote-Branch einpflegen zu können, ist ein Pull-Request-Prozess notwendig. Wenn du lokal in deinem Master-Branch einen Commit durchführst und diesen versuchst auf den serverseitigen Master-Branch zu pushen, wirst du folgende Fehlermeldung bekommen:",
+              "Wenn du in einem großen Team zusammen arbeitest, ist der Main-Branch mit hoher Wahrscheinlichkeit für direkte Änderungen gesperrt. Um Änderungen am Remote-Branch einpflegen zu können, ist ein Pull-Request-Prozess notwendig. Wenn du lokal in deinem Main-Branch einen Commit durchführst und diesen versuchst auf den serverseitigen Main-Branch zu pushen, wirst du folgende Fehlermeldung bekommen:",
              "",
              "```",
              " ! [remote rejected] main -> main (TF402455: Pushes to this branch are not permitted; you must use a pull request to update this branch.)",
@ -93,9 +93,9 @@ exports.level = {
            "markdowns": [
              "## Wieso wurde diese Aktion zurückgewiesen?",
              "",
-              "Auf Grund der serverseitig voreingestellten Richtlinien sind direkte Änderungen am Master-Branch nicht erlaubt, und erfordert einen Pull-Request.",
+              "Auf Grund der serverseitig voreingestellten Richtlinien sind direkte Änderungen am Main-Branch nicht erlaubt, und erfordert einen Pull-Request.",
              "",
-              "Um die eigenen lokalen Änderungen in den Master-Branch einbringen zu können, ist es erforderlich einen lokalen Feature-Branch zu erstellen. Dieser Feature-Branch muss dann auf den Server hochgeladen werden, damit dann ein Pull-Request eingeleitet werden kann. Dies wurde vorher durch den direkten Push des Master-Branch nicht berücksichtigt, weswegen man die Änderungen nicht hochladen konnte."
+              "Um die eigenen lokalen Änderungen in den Main-Branch einbringen zu können, ist es erforderlich einen lokalen Feature-Branch zu erstellen. Dieser Feature-Branch muss dann auf den Server hochgeladen werden, damit dann ein Pull-Request eingeleitet werden kann. Dies wurde vorher durch den direkten Push des Main-Branch nicht berücksichtigt, weswegen man die Änderungen nicht hochladen konnte."
            ]
          }
        },
@ -105,12 +105,12 @@ exports.level = {
            "markdowns": [
              "## Die Lösung",
              "",
-              "Erstelle einen Branch der feature heißt und pushe diesen auf den Server. Setze den lokalen Master-Branch zurück, dass er mit dem Origin-Master-Branch synchron ist. Dies könnte sonst später zu Komplikationen führen, wenn weitere `pull`s durchgeführt und Commits von anderen mit deinen in Konflikt stehen."
+              "Erstelle einen Branch der feature heißt und pushe diesen auf den Server. Setze den lokalen Main-Branch zurück, dass er mit dem Origin-Main-Branch synchron ist. Dies könnte sonst später zu Komplikationen führen, wenn weitere `pull`s durchgeführt und Commits von anderen mit deinen in Konflikt stehen."
            ]
          }
        }
      ]
-    },  
+    },
    "zh_CN": {
        "childViews": [
        {
@ -119,7 +119,7 @@ exports.level = {
            "markdowns": [
              "## 远程服务器拒绝!(Remote Rejected)",
              "",
-              "如果你是在一个大的合作团队中工作, 很可能是master被锁定了, 需要一些Pull Request流程来合并修改。如果你直接提交(commit)到本地master, 然后试图推送(push)修改, 你将会收到这样类似的信息:",
+              "如果你是在一个大的合作团队中工作, 很可能是main被锁定了, 需要一些Pull Request流程来合并修改。如果你直接提交(commit)到本地main, 然后试图推送(push)修改, 你将会收到这样类似的信息:",
              "",
              "```",
              " ! [远程服务器拒绝] main -> main (TF402455: 不允许推送(push)这个分支; 你必须使用pull request来更新这个分支.)",
@ -133,9 +133,9 @@ exports.level = {
            "markdowns": [
              "## 为什么会被拒绝?",
              "",
-              "远程服务器拒绝直接推送(push)提交到master, 因为策略配置要求 pull requests 来提交更新.",
+              "远程服务器拒绝直接推送(push)提交到main, 因为策略配置要求 pull requests 来提交更新.",
              "",
-              "你应该按照流程,新建一个分支, 推送(push)这个分支并申请pull request,但是你忘记并直接提交给了master.现在你卡住并且无法推送你的更新."
+              "你应该按照流程,新建一个分支, 推送(push)这个分支并申请pull request,但是你忘记并直接提交给了main.现在你卡住并且无法推送你的更新."
            ]
          }
        },
@ -145,7 +145,7 @@ exports.level = {
            "markdowns": [
              "## 解决办法",
              "",
-              "新建一个分支feature, 推送到远程服务器. 然后reset你的master分支和远程服务器保持一致, 否则下次你pull并且他人的提交和你冲突的时候就会有问题."
+              "新建一个分支feature, 推送到远程服务器. 然后reset你的main分支和远程服务器保持一致, 否则下次你pull并且他人的提交和你冲突的时候就会有问题."
            ]
          }
        }
@ -234,7 +234,7 @@ exports.level = {
              "## Рішення:",
              "",
              "Створіть ще одну гілку з назвою `feature` і відправте зміни у віддалений репозиторій. Також не забудьте повернути вашу локальну гілку `main` в вихідне положення (щоб вона була синхронізована з віддаленою). Інакше у вас можуть виникнути складнощі при наступному виконанні запиту `git pull`, коли коміти інших розробників конфліктуватимуть з вашими."
-              
+
            ]
          }
        }
--- a/src/levels/remote/mergeManyFeatures.js
+++ b/src/levels/remote/mergeManyFeatures.js
@ -1,7 +1,7 @@
 exports.level = {
-  "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C11\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\",\"localBranchesThatTrackThis\":null},\"o/master\":{\"target\":\"C11\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":[\"master\"]},\"side1\":{\"target\":\"C2\",\"id\":\"side1\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null},\"side2\":{\"target\":\"C4\",\"id\":\"side2\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null},\"side3\":{\"target\":\"C7\",\"id\":\"side3\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C1\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"},\"C8\":{\"parents\":[\"C1\"],\"id\":\"C8\"},\"C9\":{\"parents\":[\"C2\",\"C8\"],\"id\":\"C9\"},\"C10\":{\"parents\":[\"C4\",\"C9\"],\"id\":\"C10\"},\"C11\":{\"parents\":[\"C10\",\"C7\"],\"id\":\"C11\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C11\",\"id\":\"master\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C8\":{\"parents\":[\"C1\"],\"id\":\"C8\"},\"C5\":{\"parents\":[\"C1\"],\"id\":\"C5\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C9\":{\"parents\":[\"C2\",\"C8\"],\"id\":\"C9\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"},\"C10\":{\"parents\":[\"C4\",\"C9\"],\"id\":\"C10\"},\"C11\":{\"parents\":[\"C10\",\"C7\"],\"id\":\"C11\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}}",
+  "goalTreeString": "{\"branches\":{\"main\":{\"target\":\"C11\",\"id\":\"main\",\"remoteTrackingBranchID\":\"o/main\",\"localBranchesThatTrackThis\":null},\"o/main\":{\"target\":\"C11\",\"id\":\"o/main\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":[\"main\"]},\"side1\":{\"target\":\"C2\",\"id\":\"side1\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null},\"side2\":{\"target\":\"C4\",\"id\":\"side2\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null},\"side3\":{\"target\":\"C7\",\"id\":\"side3\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C1\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"},\"C8\":{\"parents\":[\"C1\"],\"id\":\"C8\"},\"C9\":{\"parents\":[\"C2\",\"C8\"],\"id\":\"C9\"},\"C10\":{\"parents\":[\"C4\",\"C9\"],\"id\":\"C10\"},\"C11\":{\"parents\":[\"C10\",\"C7\"],\"id\":\"C11\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C11\",\"id\":\"main\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C8\":{\"parents\":[\"C1\"],\"id\":\"C8\"},\"C5\":{\"parents\":[\"C1\"],\"id\":\"C5\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C9\":{\"parents\":[\"C2\",\"C8\"],\"id\":\"C9\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"},\"C10\":{\"parents\":[\"C4\",\"C9\"],\"id\":\"C10\"},\"C11\":{\"parents\":[\"C10\",\"C7\"],\"id\":\"C11\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}}",
  "solutionCommand": "git checkout main;git pull;git merge side1;git merge side2;git merge side3;git push",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\",\"localBranchesThatTrackThis\":null},\"o/master\":{\"target\":\"C1\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":[\"master\"]},\"side1\":{\"target\":\"C2\",\"id\":\"side1\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null},\"side2\":{\"target\":\"C4\",\"id\":\"side2\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null},\"side3\":{\"target\":\"C7\",\"id\":\"side3\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C1\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"}},\"HEAD\":{\"target\":\"side3\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C8\",\"id\":\"master\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C8\":{\"parents\":[\"C1\"],\"id\":\"C8\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\",\"remoteTrackingBranchID\":\"o/main\",\"localBranchesThatTrackThis\":null},\"o/main\":{\"target\":\"C1\",\"id\":\"o/main\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":[\"main\"]},\"side1\":{\"target\":\"C2\",\"id\":\"side1\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null},\"side2\":{\"target\":\"C4\",\"id\":\"side2\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null},\"side3\":{\"target\":\"C7\",\"id\":\"side3\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C1\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"}},\"HEAD\":{\"target\":\"side3\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C8\",\"id\":\"main\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C8\":{\"parents\":[\"C1\"],\"id\":\"C8\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}}",
  "name": {
    "en_US": "Merging with remotes",
    "zh_CN": "合并远程仓库",
@ -36,7 +36,7 @@ exports.level = {
    "vi"   : "Hãy để ý đến cây mục tiêu!",
    "sl_SI": "Poglej si ciljno drevo!"
  },
-  "compareOnlyMaster": true,
+  "compareOnlyMain": true,
  "startDialog": {
    "en_US": {
      "childViews": [
--- a/src/levels/remote/pull.js
+++ b/src/levels/remote/pull.js
@ -1,7 +1,7 @@
 exports.level = {
-  "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C4\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\",\"localBranchesThatTrackThis\":null},\"o/master\":{\"target\":\"C3\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":[\"master\"]}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C2\",\"C3\"],\"id\":\"C4\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C3\",\"id\":\"master\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}}",
+  "goalTreeString": "{\"branches\":{\"main\":{\"target\":\"C4\",\"id\":\"main\",\"remoteTrackingBranchID\":\"o/main\",\"localBranchesThatTrackThis\":null},\"o/main\":{\"target\":\"C3\",\"id\":\"o/main\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":[\"main\"]}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C2\",\"C3\"],\"id\":\"C4\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C3\",\"id\":\"main\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}}",
  "solutionCommand": "git pull",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\",\"localBranchesThatTrackThis\":null},\"o/master\":{\"target\":\"C1\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":[\"master\"]}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C3\",\"id\":\"master\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C2\",\"id\":\"main\",\"remoteTrackingBranchID\":\"o/main\",\"localBranchesThatTrackThis\":null},\"o/main\":{\"target\":\"C1\",\"id\":\"o/main\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":[\"main\"]}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C3\",\"id\":\"main\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}}",
  "name": {
    "en_US": "Git Pullin'",
    "zh_CN": "Git Pull",
--- a/src/levels/remote/pullArgs.js
+++ b/src/levels/remote/pullArgs.js
@ -1,7 +1,7 @@
 exports.level = {
-  "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C6\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\"},\"o/master\":{\"target\":\"C1\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null},\"o/bar\":{\"target\":\"C1\",\"id\":\"o/bar\",\"remoteTrackingBranchID\":null},\"foo\":{\"target\":\"C3\",\"id\":\"foo\",\"remoteTrackingBranchID\":null},\"side\":{\"target\":\"C2\",\"id\":\"side\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C4\":{\"parents\":[\"C1\"],\"id\":\"C4\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C5\":{\"parents\":[\"C3\",\"C4\"],\"id\":\"C5\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C6\":{\"parents\":[\"C2\",\"C5\"],\"id\":\"C6\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\",\"remoteTrackingBranchID\":null},\"bar\":{\"target\":\"C3\",\"id\":\"bar\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"bar\",\"id\":\"HEAD\"}}}",
+  "goalTreeString": "{\"branches\":{\"main\":{\"target\":\"C6\",\"id\":\"main\",\"remoteTrackingBranchID\":\"o/main\"},\"o/main\":{\"target\":\"C1\",\"id\":\"o/main\",\"remoteTrackingBranchID\":null},\"o/bar\":{\"target\":\"C1\",\"id\":\"o/bar\",\"remoteTrackingBranchID\":null},\"foo\":{\"target\":\"C3\",\"id\":\"foo\",\"remoteTrackingBranchID\":null},\"side\":{\"target\":\"C2\",\"id\":\"side\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C4\":{\"parents\":[\"C1\"],\"id\":\"C4\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C5\":{\"parents\":[\"C3\",\"C4\"],\"id\":\"C5\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C6\":{\"parents\":[\"C2\",\"C5\"],\"id\":\"C6\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C2\",\"id\":\"main\",\"remoteTrackingBranchID\":null},\"bar\":{\"target\":\"C3\",\"id\":\"bar\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"bar\",\"id\":\"HEAD\"}}}",
  "solutionCommand": "git pull origin bar:foo;git pull origin main:side",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C4\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\"},\"o/master\":{\"target\":\"C1\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null},\"o/bar\":{\"target\":\"C1\",\"id\":\"o/bar\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C4\":{\"parents\":[\"C1\"],\"id\":\"C4\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\",\"remoteTrackingBranchID\":null},\"bar\":{\"target\":\"C3\",\"id\":\"bar\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"bar\",\"id\":\"HEAD\"}}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C4\",\"id\":\"main\",\"remoteTrackingBranchID\":\"o/main\"},\"o/main\":{\"target\":\"C1\",\"id\":\"o/main\",\"remoteTrackingBranchID\":null},\"o/bar\":{\"target\":\"C1\",\"id\":\"o/bar\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C4\":{\"parents\":[\"C1\"],\"id\":\"C4\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C2\",\"id\":\"main\",\"remoteTrackingBranchID\":null},\"bar\":{\"target\":\"C3\",\"id\":\"bar\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"bar\",\"id\":\"HEAD\"}}}",
  "name": {
    "en_US": "Pull arguments",
    "zh_CN": "Git pull 的参数",
--- a/src/levels/remote/push.js
+++ b/src/levels/remote/push.js
@ -2,9 +2,9 @@ exports.level = {
  "disabledMap": {
    "git fakeTeamwork": true,
  },
-  "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C3\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\",\"localBranchesThatTrackThis\":null},\"o/master\":{\"target\":\"C3\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":[\"master\"]}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C3\",\"id\":\"master\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}}",
+  "goalTreeString": "{\"branches\":{\"main\":{\"target\":\"C3\",\"id\":\"main\",\"remoteTrackingBranchID\":\"o/main\",\"localBranchesThatTrackThis\":null},\"o/main\":{\"target\":\"C3\",\"id\":\"o/main\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":[\"main\"]}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C3\",\"id\":\"main\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}}",
  "solutionCommand": "git commit;git commit;git push",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\"},\"o/master\":{\"target\":\"C1\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"tags\":{},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"tags\":{},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\",\"remoteTrackingBranchID\":\"o/main\"},\"o/main\":{\"target\":\"C1\",\"id\":\"o/main\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"tags\":{},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"tags\":{},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}}",
  "name": {
    "en_US": "Git Pushin'",
    "zh_CN": "Git Push",
--- a/src/levels/remote/pushArgs.js
+++ b/src/levels/remote/pushArgs.js
@ -1,7 +1,7 @@
 exports.level = {
-  "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\"},\"foo\":{\"target\":\"C3\",\"id\":\"foo\",\"remoteTrackingBranchID\":\"o/foo\"},\"o/master\":{\"target\":\"C2\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null},\"o/foo\":{\"target\":\"C3\",\"id\":\"o/foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"C0\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\",\"remoteTrackingBranchID\":null},\"foo\":{\"target\":\"C3\",\"id\":\"foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}}",
+  "goalTreeString": "{\"branches\":{\"main\":{\"target\":\"C2\",\"id\":\"main\",\"remoteTrackingBranchID\":\"o/main\"},\"foo\":{\"target\":\"C3\",\"id\":\"foo\",\"remoteTrackingBranchID\":\"o/foo\"},\"o/main\":{\"target\":\"C2\",\"id\":\"o/main\",\"remoteTrackingBranchID\":null},\"o/foo\":{\"target\":\"C3\",\"id\":\"o/foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"C0\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C2\",\"id\":\"main\",\"remoteTrackingBranchID\":null},\"foo\":{\"target\":\"C3\",\"id\":\"foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}}",
  "solutionCommand": "git push origin main;git push origin foo",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\"},\"foo\":{\"target\":\"C3\",\"id\":\"foo\",\"remoteTrackingBranchID\":\"o/foo\"},\"o/master\":{\"target\":\"C1\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null},\"o/foo\":{\"target\":\"C1\",\"id\":\"o/foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"C0\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\",\"remoteTrackingBranchID\":null},\"foo\":{\"target\":\"C1\",\"id\":\"foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C2\",\"id\":\"main\",\"remoteTrackingBranchID\":\"o/main\"},\"foo\":{\"target\":\"C3\",\"id\":\"foo\",\"remoteTrackingBranchID\":\"o/foo\"},\"o/main\":{\"target\":\"C1\",\"id\":\"o/main\",\"remoteTrackingBranchID\":null},\"o/foo\":{\"target\":\"C1\",\"id\":\"o/foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"}},\"HEAD\":{\"target\":\"C0\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\",\"remoteTrackingBranchID\":null},\"foo\":{\"target\":\"C1\",\"id\":\"foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}}",
  "disabledMap": {
    "git checkout": true
  },
--- a/src/levels/remote/pushArgs2.js
+++ b/src/levels/remote/pushArgs2.js
@ -1,7 +1,7 @@
 exports.level = {
-    "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C6\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\"},\"foo\":{\"target\":\"C4\",\"id\":\"foo\",\"remoteTrackingBranchID\":\"o/foo\"},\"o/master\":{\"target\":\"C4\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null},\"o/foo\":{\"target\":\"C5\",\"id\":\"o/foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C2\",\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C2\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C4\",\"id\":\"master\",\"remoteTrackingBranchID\":null},\"foo\":{\"target\":\"C5\",\"id\":\"foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C5\":{\"parents\":[\"C2\"],\"id\":\"C5\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C2\",\"C3\"],\"id\":\"C4\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}}",
+    "goalTreeString": "{\"branches\":{\"main\":{\"target\":\"C6\",\"id\":\"main\",\"remoteTrackingBranchID\":\"o/main\"},\"foo\":{\"target\":\"C4\",\"id\":\"foo\",\"remoteTrackingBranchID\":\"o/foo\"},\"o/main\":{\"target\":\"C4\",\"id\":\"o/main\",\"remoteTrackingBranchID\":null},\"o/foo\":{\"target\":\"C5\",\"id\":\"o/foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C2\",\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C2\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C4\",\"id\":\"main\",\"remoteTrackingBranchID\":null},\"foo\":{\"target\":\"C5\",\"id\":\"foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C5\":{\"parents\":[\"C2\"],\"id\":\"C5\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C2\",\"C3\"],\"id\":\"C4\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}}",
  "solutionCommand": "git push origin main^:foo;git push origin foo:main",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C6\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\"},\"foo\":{\"target\":\"C4\",\"id\":\"foo\",\"remoteTrackingBranchID\":\"o/foo\"},\"o/master\":{\"target\":\"C1\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null},\"o/foo\":{\"target\":\"C1\",\"id\":\"o/foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C2\",\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C2\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\",\"remoteTrackingBranchID\":null},\"foo\":{\"target\":\"C1\",\"id\":\"foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C6\",\"id\":\"main\",\"remoteTrackingBranchID\":\"o/main\"},\"foo\":{\"target\":\"C4\",\"id\":\"foo\",\"remoteTrackingBranchID\":\"o/foo\"},\"o/main\":{\"target\":\"C1\",\"id\":\"o/main\",\"remoteTrackingBranchID\":null},\"o/foo\":{\"target\":\"C1\",\"id\":\"o/foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C2\",\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C2\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\",\"remoteTrackingBranchID\":null},\"foo\":{\"target\":\"C1\",\"id\":\"foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}}",
  "name": {
    "en_US": "Git push arguments -- Expanded!",
    "zh_CN": "Git push 参数 2",
--- a/src/levels/remote/pushManyFeatures.js
+++ b/src/levels/remote/pushManyFeatures.js
@ -1,7 +1,7 @@
 exports.level = {
-  "goalTreeString": "%7B%22branches%22%3A%7B%22master%22%3A%7B%22target%22%3A%22C7%27%22%2C%22id%22%3A%22master%22%2C%22remoteTrackingBranchID%22%3A%22o/master%22%2C%22localBranchesThatTrackThis%22%3Anull%7D%2C%22o/master%22%3A%7B%22target%22%3A%22C7%27%22%2C%22id%22%3A%22o/master%22%2C%22remoteTrackingBranchID%22%3Anull%2C%22localBranchesThatTrackThis%22%3A%5B%22master%22%5D%7D%2C%22side1%22%3A%7B%22target%22%3A%22C2%27%22%2C%22id%22%3A%22side1%22%2C%22remoteTrackingBranchID%22%3Anull%2C%22localBranchesThatTrackThis%22%3Anull%7D%2C%22side2%22%3A%7B%22target%22%3A%22C4%27%22%2C%22id%22%3A%22side2%22%2C%22remoteTrackingBranchID%22%3Anull%2C%22localBranchesThatTrackThis%22%3Anull%7D%2C%22side3%22%3A%7B%22target%22%3A%22C7%27%22%2C%22id%22%3A%22side3%22%2C%22remoteTrackingBranchID%22%3Anull%2C%22localBranchesThatTrackThis%22%3Anull%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C4%22%3A%7B%22parents%22%3A%5B%22C3%22%5D%2C%22id%22%3A%22C4%22%7D%2C%22C5%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C5%22%7D%2C%22C6%22%3A%7B%22parents%22%3A%5B%22C5%22%5D%2C%22id%22%3A%22C6%22%7D%2C%22C7%22%3A%7B%22parents%22%3A%5B%22C6%22%5D%2C%22id%22%3A%22C7%22%7D%2C%22C8%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C8%22%7D%2C%22C2%27%22%3A%7B%22parents%22%3A%5B%22C8%22%5D%2C%22id%22%3A%22C2%27%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C2%27%22%5D%2C%22id%22%3A%22C3%27%22%7D%2C%22C4%27%22%3A%7B%22parents%22%3A%5B%22C3%27%22%5D%2C%22id%22%3A%22C4%27%22%7D%2C%22C5%27%22%3A%7B%22parents%22%3A%5B%22C4%27%22%5D%2C%22id%22%3A%22C5%27%22%7D%2C%22C6%27%22%3A%7B%22parents%22%3A%5B%22C5%27%22%5D%2C%22id%22%3A%22C6%27%22%7D%2C%22C7%27%22%3A%7B%22parents%22%3A%5B%22C6%27%22%5D%2C%22id%22%3A%22C7%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22master%22%2C%22id%22%3A%22HEAD%22%7D%2C%22originTree%22%3A%7B%22branches%22%3A%7B%22master%22%3A%7B%22target%22%3A%22C7%27%22%2C%22id%22%3A%22master%22%2C%22remoteTrackingBranchID%22%3Anull%2C%22localBranchesThatTrackThis%22%3Anull%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C8%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C8%22%7D%2C%22C2%27%22%3A%7B%22parents%22%3A%5B%22C8%22%5D%2C%22id%22%3A%22C2%27%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C2%27%22%5D%2C%22id%22%3A%22C3%27%22%7D%2C%22C4%27%22%3A%7B%22parents%22%3A%5B%22C3%27%22%5D%2C%22id%22%3A%22C4%27%22%7D%2C%22C5%27%22%3A%7B%22parents%22%3A%5B%22C4%27%22%5D%2C%22id%22%3A%22C5%27%22%7D%2C%22C6%27%22%3A%7B%22parents%22%3A%5B%22C5%27%22%5D%2C%22id%22%3A%22C6%27%22%7D%2C%22C7%27%22%3A%7B%22parents%22%3A%5B%22C6%27%22%5D%2C%22id%22%3A%22C7%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22master%22%2C%22id%22%3A%22HEAD%22%7D%7D%7D",
+  "goalTreeString": "%7B%22branches%22%3A%7B%22main%22%3A%7B%22target%22%3A%22C7%27%22%2C%22id%22%3A%22main%22%2C%22remoteTrackingBranchID%22%3A%22o/main%22%2C%22localBranchesThatTrackThis%22%3Anull%7D%2C%22o/main%22%3A%7B%22target%22%3A%22C7%27%22%2C%22id%22%3A%22o/main%22%2C%22remoteTrackingBranchID%22%3Anull%2C%22localBranchesThatTrackThis%22%3A%5B%22main%22%5D%7D%2C%22side1%22%3A%7B%22target%22%3A%22C2%27%22%2C%22id%22%3A%22side1%22%2C%22remoteTrackingBranchID%22%3Anull%2C%22localBranchesThatTrackThis%22%3Anull%7D%2C%22side2%22%3A%7B%22target%22%3A%22C4%27%22%2C%22id%22%3A%22side2%22%2C%22remoteTrackingBranchID%22%3Anull%2C%22localBranchesThatTrackThis%22%3Anull%7D%2C%22side3%22%3A%7B%22target%22%3A%22C7%27%22%2C%22id%22%3A%22side3%22%2C%22remoteTrackingBranchID%22%3Anull%2C%22localBranchesThatTrackThis%22%3Anull%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C4%22%3A%7B%22parents%22%3A%5B%22C3%22%5D%2C%22id%22%3A%22C4%22%7D%2C%22C5%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C5%22%7D%2C%22C6%22%3A%7B%22parents%22%3A%5B%22C5%22%5D%2C%22id%22%3A%22C6%22%7D%2C%22C7%22%3A%7B%22parents%22%3A%5B%22C6%22%5D%2C%22id%22%3A%22C7%22%7D%2C%22C8%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C8%22%7D%2C%22C2%27%22%3A%7B%22parents%22%3A%5B%22C8%22%5D%2C%22id%22%3A%22C2%27%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C2%27%22%5D%2C%22id%22%3A%22C3%27%22%7D%2C%22C4%27%22%3A%7B%22parents%22%3A%5B%22C3%27%22%5D%2C%22id%22%3A%22C4%27%22%7D%2C%22C5%27%22%3A%7B%22parents%22%3A%5B%22C4%27%22%5D%2C%22id%22%3A%22C5%27%22%7D%2C%22C6%27%22%3A%7B%22parents%22%3A%5B%22C5%27%22%5D%2C%22id%22%3A%22C6%27%22%7D%2C%22C7%27%22%3A%7B%22parents%22%3A%5B%22C6%27%22%5D%2C%22id%22%3A%22C7%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22main%22%2C%22id%22%3A%22HEAD%22%7D%2C%22originTree%22%3A%7B%22branches%22%3A%7B%22main%22%3A%7B%22target%22%3A%22C7%27%22%2C%22id%22%3A%22main%22%2C%22remoteTrackingBranchID%22%3Anull%2C%22localBranchesThatTrackThis%22%3Anull%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C8%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C8%22%7D%2C%22C2%27%22%3A%7B%22parents%22%3A%5B%22C8%22%5D%2C%22id%22%3A%22C2%27%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C2%27%22%5D%2C%22id%22%3A%22C3%27%22%7D%2C%22C4%27%22%3A%7B%22parents%22%3A%5B%22C3%27%22%5D%2C%22id%22%3A%22C4%27%22%7D%2C%22C5%27%22%3A%7B%22parents%22%3A%5B%22C4%27%22%5D%2C%22id%22%3A%22C5%27%22%7D%2C%22C6%27%22%3A%7B%22parents%22%3A%5B%22C5%27%22%5D%2C%22id%22%3A%22C6%27%22%7D%2C%22C7%27%22%3A%7B%22parents%22%3A%5B%22C6%27%22%5D%2C%22id%22%3A%22C7%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22main%22%2C%22id%22%3A%22HEAD%22%7D%7D%7D",
  "solutionCommand": "git fetch;git rebase o/main side1;git rebase side1 side2;git rebase side2 side3;git rebase side3 main;git push",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\",\"localBranchesThatTrackThis\":null},\"o/master\":{\"target\":\"C1\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":[\"master\"]},\"side1\":{\"target\":\"C2\",\"id\":\"side1\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null},\"side2\":{\"target\":\"C4\",\"id\":\"side2\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null},\"side3\":{\"target\":\"C7\",\"id\":\"side3\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C1\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"}},\"HEAD\":{\"target\":\"side3\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C8\",\"id\":\"master\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C8\":{\"parents\":[\"C1\"],\"id\":\"C8\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\",\"remoteTrackingBranchID\":\"o/main\",\"localBranchesThatTrackThis\":null},\"o/main\":{\"target\":\"C1\",\"id\":\"o/main\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":[\"main\"]},\"side1\":{\"target\":\"C2\",\"id\":\"side1\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null},\"side2\":{\"target\":\"C4\",\"id\":\"side2\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null},\"side3\":{\"target\":\"C7\",\"id\":\"side3\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C1\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C5\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"}},\"HEAD\":{\"target\":\"side3\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C8\",\"id\":\"main\",\"remoteTrackingBranchID\":null,\"localBranchesThatTrackThis\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C8\":{\"parents\":[\"C1\"],\"id\":\"C8\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}}",
  "hint": {
    "en_US": "Remember you can always use the undo or reset commands",
    "zh_CN": "你随时都可以使用 undo 或 reset 命令。",
@ -20,23 +20,23 @@ exports.level = {
    "sl_SI": "Vedno lahko razveljaviš ukaz ali ponastaviš stopnjo."
  },
  "name": {
-    "en_US": "Push Master!",
+    "en_US": "Push Main!",
    "zh_CN": "推送主分支",
    "zh_TW": "push main！",
-    "es_AR": "¡Push Master!",
-    "es_ES": "¡Push Master!",
-    "pt_BR": "Push Master!",
-    "gl"   : "Empurra ó Master!",
-    "de_DE": "Push Master!",
-    "ja"   : "Push Master!",
+    "es_AR": "¡Push Main!",
+    "es_ES": "¡Push Main!",
+    "pt_BR": "Push Main!",
+    "gl"   : "Empurra ó Main!",
+    "de_DE": "Push Main!",
+    "ja"   : "Push Main!",
    "fr_FR": "Maître du push !",
    "ru_RU": "Push Мастер!",
-    "ko"   : "Push Master!",
+    "ko"   : "Push Main!",
    "uk"   : "Push Maйстер!",
-    "vi"   : "Push Master!",
-    "sl_SI": "Push Master!"
+    "vi"   : "Push Main!",
+    "sl_SI": "Push Main!"
  },
-  "compareOnlyMasterHashAgnostic": true,
+  "compareOnlyMainHashAgnostic": true,
  "startDialog": {
    "en_US": {
      "childViews": [
--- a/src/levels/remote/remoteBranches.js
+++ b/src/levels/remote/remoteBranches.js
@ -1,7 +1,7 @@
 exports.level = {
-  "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C3\",\"id\":\"master\"},\"o/master\":{\"target\":\"C1\",\"id\":\"o/master\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C1\"],\"id\":\"C4\"}},\"HEAD\":{\"target\":\"C4\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}}",
+  "goalTreeString": "{\"branches\":{\"main\":{\"target\":\"C3\",\"id\":\"main\"},\"o/main\":{\"target\":\"C1\",\"id\":\"o/main\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C1\"],\"id\":\"C4\"}},\"HEAD\":{\"target\":\"C4\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C2\",\"id\":\"main\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}}",
  "solutionCommand": "git commit;git checkout o/main;git commit",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\"},\"o/master\":{\"target\":\"C1\",\"id\":\"o/master\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\"},\"o/main\":{\"target\":\"C1\",\"id\":\"o/main\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C2\",\"id\":\"main\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}}",
  "name": {
    "en_US": "Remote Branches",
    "zh_CN": "远程分支",
@ -29,7 +29,7 @@ exports.level = {
    "pt_BR": "Preste atenção na ordem: commite no main primeiro!",
    "gl"   : "Preta atención á orde: fai commit no main primeiro",
    "de_DE": "Beachte die Sortierung -- committe zuerst auf dem main!",
-    "ja"   : "順番に注意 -- まずmasterに対してcommitしましょう",
+    "ja"   : "順番に注意 -- まずmainに対してcommitしましょう",
    "fr_FR": "Prêtez attention à l'ordre -- les commits sur main d'abord !",
    "ru_RU": "Уделяйте внимание очерёдности -- сперва commit на main",
    "ko"   : "순서에 주의하세요: main 브랜치 에서 먼저 커밋하세요!",
@ -598,7 +598,7 @@ exports.level = {
              "",
              "あなたは今や`git clone`の動作を知ったことでしょうから、次は実際に詳細を見てみましょう。",
              "",
-              "まず、もしかしたらもう気付いているかもしれないですが、私たちのローカルリポジトリにo/masterという名前の新しいブランチが追加されています。このようなブランチは、_リモート_ブランチと呼ばれます。リモートブランチは、その固有の役割を担うために特別なプロパティを持っています。",
+              "まず、もしかしたらもう気付いているかもしれないですが、私たちのローカルリポジトリにo/mainという名前の新しいブランチが追加されています。このようなブランチは、_リモート_ブランチと呼ばれます。リモートブランチは、その固有の役割を担うために特別なプロパティを持っています。",
              "",
              "リモートブランチは、リモートリポジトリの_状態_を反映します（あなたがそのリモートリポジトリから変更を最後に問い合わせてからの）。",
              "",
--- a/src/levels/remote/sourceNothing.js
+++ b/src/levels/remote/sourceNothing.js
@ -4,9 +4,9 @@ exports.level = {
    "git branch": true,
    "git checkout": true
  },
-  "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\"},\"o/master\":{\"target\":\"C1\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null},\"bar\":{\"target\":\"C1\",\"id\":\"bar\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}}",
+  "goalTreeString": "{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\",\"remoteTrackingBranchID\":\"o/main\"},\"o/main\":{\"target\":\"C1\",\"id\":\"o/main\",\"remoteTrackingBranchID\":null},\"bar\":{\"target\":\"C1\",\"id\":\"bar\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}}",
  "solutionCommand": "git push origin :foo;git fetch origin :bar",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\"},\"o/master\":{\"target\":\"C1\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null},\"o/foo\":{\"target\":\"C1\",\"id\":\"o/foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\",\"remoteTrackingBranchID\":null},\"foo\":{\"target\":\"C1\",\"id\":\"foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\",\"remoteTrackingBranchID\":\"o/main\"},\"o/main\":{\"target\":\"C1\",\"id\":\"o/main\",\"remoteTrackingBranchID\":null},\"o/foo\":{\"target\":\"C1\",\"id\":\"o/foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\",\"remoteTrackingBranchID\":null},\"foo\":{\"target\":\"C1\",\"id\":\"foo\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}}",
  "name": {
    "en_US": "Source of nothing",
    "zh_CN": "没有 source 的 source",
--- a/src/levels/remote/tracking.js
+++ b/src/levels/remote/tracking.js
@ -1,7 +1,7 @@
 exports.level = {
-  "goalTreeString": "%7B%22branches%22%3A%7B%22master%22%3A%7B%22target%22%3A%22C1%22%2C%22id%22%3A%22master%22%2C%22remoteTrackingBranchID%22%3A%22o/master%22%7D%2C%22o/master%22%3A%7B%22target%22%3A%22C3%27%22%2C%22id%22%3A%22o/master%22%2C%22remoteTrackingBranchID%22%3Anull%7D%2C%22side%22%3A%7B%22target%22%3A%22C3%27%22%2C%22id%22%3A%22side%22%2C%22remoteTrackingBranchID%22%3A%22o/master%22%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C3%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22side%22%2C%22id%22%3A%22HEAD%22%7D%2C%22originTree%22%3A%7B%22branches%22%3A%7B%22master%22%3A%7B%22target%22%3A%22C3%27%22%2C%22id%22%3A%22master%22%2C%22remoteTrackingBranchID%22%3Anull%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C3%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22master%22%2C%22id%22%3A%22HEAD%22%7D%7D%7D",
+  "goalTreeString": "%7B%22branches%22%3A%7B%22main%22%3A%7B%22target%22%3A%22C1%22%2C%22id%22%3A%22main%22%2C%22remoteTrackingBranchID%22%3A%22o/main%22%7D%2C%22o/main%22%3A%7B%22target%22%3A%22C3%27%22%2C%22id%22%3A%22o/main%22%2C%22remoteTrackingBranchID%22%3Anull%7D%2C%22side%22%3A%7B%22target%22%3A%22C3%27%22%2C%22id%22%3A%22side%22%2C%22remoteTrackingBranchID%22%3A%22o/main%22%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C3%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C3%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C3%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22side%22%2C%22id%22%3A%22HEAD%22%7D%2C%22originTree%22%3A%7B%22branches%22%3A%7B%22main%22%3A%7B%22target%22%3A%22C3%27%22%2C%22id%22%3A%22main%22%2C%22remoteTrackingBranchID%22%3Anull%7D%7D%2C%22commits%22%3A%7B%22C0%22%3A%7B%22parents%22%3A%5B%5D%2C%22id%22%3A%22C0%22%2C%22rootCommit%22%3Atrue%7D%2C%22C1%22%3A%7B%22parents%22%3A%5B%22C0%22%5D%2C%22id%22%3A%22C1%22%7D%2C%22C2%22%3A%7B%22parents%22%3A%5B%22C1%22%5D%2C%22id%22%3A%22C2%22%7D%2C%22C3%27%22%3A%7B%22parents%22%3A%5B%22C2%22%5D%2C%22id%22%3A%22C3%27%22%7D%7D%2C%22HEAD%22%3A%7B%22target%22%3A%22main%22%2C%22id%22%3A%22HEAD%22%7D%7D%7D",
  "solutionCommand": "git checkout -b side o/main;git commit;git pull --rebase;git push",
-  "startTree": "{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\"},\"o/master\":{\"target\":\"C1\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}}",
+  "startTree": "{\"branches\":{\"main\":{\"target\":\"C1\",\"id\":\"main\",\"remoteTrackingBranchID\":\"o/main\"},\"o/main\":{\"target\":\"C1\",\"id\":\"o/main\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"main\":{\"target\":\"C2\",\"id\":\"main\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"}},\"HEAD\":{\"target\":\"main\",\"id\":\"HEAD\"}}}",
  "name": {
    "en_US": "Remote Tracking",
    "zh_CN": "远程追踪",
@ -317,13 +317,13 @@ exports.level = {
            "markdowns": [
              "### ¿Puedo especificarlo yo?",
              "",
-              "¡Claro que sí! Podés hacer que cualquier rama que quieras trackee `o/main`, y si lo hicieras, esa rama va a tener el mismo destino implícito de push y objetivo implícito de merge que `main`. Eso significa que podés correr `git push` en una rama llamada `absolutamenteNoEsMaster` y ¡que tu trabajo se pushee a la rama `main` del remoto!",
+              "¡Claro que sí! Podés hacer que cualquier rama que quieras trackee `o/main`, y si lo hicieras, esa rama va a tener el mismo destino implícito de push y objetivo implícito de merge que `main`. Eso significa que podés correr `git push` en una rama llamada `absolutamenteNoEsMain` y ¡que tu trabajo se pushee a la rama `main` del remoto!",
              "",
              "Hay dos formas de establecer esta propiedad. La primera es checkoutear una nueva rama usando una rama remota como la referencia especificada. Ejecutar",
              "",
-              "`git checkout -b absolutamenteNoEsMaster o/main`",
+              "`git checkout -b absolutamenteNoEsMain o/main`",
              "",
-              "Crea una nueva rama llamada `absolutamenteNoEsMaster` y la hace trackear a `o/main`."
+              "Crea una nueva rama llamada `absolutamenteNoEsMain` y la hace trackear a `o/main`."
            ]
          }
        },
@ -437,13 +437,13 @@ exports.level = {
            "markdowns": [
              "### ¿Puedo especificarlo yo?",
              "",
-              "¡Claro que sí! Puedes hacer que cualquier rama que quieras trackee `o/main`, y si lo hicieras, esa rama va a tener el mismo destino implícito de push y objetivo implícito de merge que `main`. Eso significa que puedes ejecutar `git push` en una rama llamada `absolutamenteNoEsMaster` y ¡que tu trabajo se pushee a la rama `main` del remoto!",
+              "¡Claro que sí! Puedes hacer que cualquier rama que quieras trackee `o/main`, y si lo hicieras, esa rama va a tener el mismo destino implícito de push y objetivo implícito de merge que `main`. Eso significa que puedes ejecutar `git push` en una rama llamada `absolutamenteNoEsMain` y ¡que tu trabajo se pushee a la rama `main` del remoto!",
              "",
              "Hay dos formas de establecer esta propiedad. La primera es hacer checkout sobre una nueva rama usando una rama remota como la referencia especificada. Ejecutar",
              "",
-              "`git checkout -b absolutamenteNoEsMaster o/main`",
+              "`git checkout -b absolutamenteNoEsMain o/main`",
              "",
-              "Crea una nueva rama llamada `absolutamenteNoEsMaster` y la hace trackear a `o/main`."
+              "Crea una nueva rama llamada `absolutamenteNoEsMain` y la hace trackear a `o/main`."
            ]
          }
        },
@ -555,13 +555,13 @@ exports.level = {
            "markdowns": [
              "### Posso eu mesmo especificar isso?",
              "",
-              "Sim, você pode! Você pode fazer com que qualquer ramo arbitrário siga o `o/main`, e se você fizer isso, esse ramo terá o mesmo destino de push implícito que e o mesmo alvo de merge que o `main`. Isso significa que você pode executar `git push` em um ramo chamado `realmenteNaoSouOMaster` e ainda assim ter seu trabalho enviado ao ramo `main` do repositório remoto!",
+              "Sim, você pode! Você pode fazer com que qualquer ramo arbitrário siga o `o/main`, e se você fizer isso, esse ramo terá o mesmo destino de push implícito que e o mesmo alvo de merge que o `main`. Isso significa que você pode executar `git push` em um ramo chamado `realmenteNaoSouOMain` e ainda assim ter seu trabalho enviado ao ramo `main` do repositório remoto!",
              "",
              "Há duas formas de configurar essa propriedade. A primeira consiste em fazer checkout de um novo ramo usando o ramo remoto como especificação de referência. Executar",
              "",
-              "`git checkout -b realmenteNaoSouOMaster o/main`",
+              "`git checkout -b realmenteNaoSouOMain o/main`",
              "",
-              "Cria um novo ramo chamado `realmenteNaoSouOMaster` e o configura para seguir o `o/main`."
+              "Cria um novo ramo chamado `realmenteNaoSouOMain` e o configura para seguir o `o/main`."
            ]
          }
        },
@ -675,13 +675,13 @@ exports.level = {
            "markdowns": [
              "### ¿Podo especificalo eu?",
              "",
-              "¡Claro que sí! Podes facer que calquera rama que quixeras seguir `o/main`, e se o fixeras, esa rama vai ter o mesmo destino implícito de push e  obxectivo implícito de merge que `main`. Eso significa que podes executar `git push` nunha rama chamada `nonMaster` e ¡que o teu traballo se empurre á rama `main` do remoto!",
+              "¡Claro que sí! Podes facer que calquera rama que quixeras seguir `o/main`, e se o fixeras, esa rama vai ter o mesmo destino implícito de push e  obxectivo implícito de merge que `main`. Eso significa que podes executar `git push` nunha rama chamada `nonMain` e ¡que o teu traballo se empurre á rama `main` do remoto!",
              "",
              "Hai dúas formas de establecer esta propiedade. A primeira é facer checkout a unha nova rama empregando unha rama remota como a referencia especificada. Executar",
              "",
-              "`git checkout -b nonMaster o/main`",
+              "`git checkout -b nonMain o/main`",
              "",
-              "Crea unha nova rama chamada `nonMaster` e persigue a `o/main`."
+              "Crea unha nova rama chamada `nonMain` e persigue a `o/main`."
            ]
          }
        },
@ -1024,13 +1024,13 @@ exports.level = {
            "markdowns": [
              "### Kann ich das auch selbst machen?",
              "",
-              "Na klar! Du kannst jeden beliebigen Branch so einstellen, dass er `o/main` trackt, und wenn du das tust wird der Branch dieselben impliziten Zielangaben für `push` und `pull` haben wie `main`. Du kannst also `git push` auf dem Branch `absolut_nicht_master` ausführen und deine Commits auf `main` des entfernten Servers schieben lassen.",
+              "Na klar! Du kannst jeden beliebigen Branch so einstellen, dass er `o/main` trackt, und wenn du das tust wird der Branch dieselben impliziten Zielangaben für `push` und `pull` haben wie `main`. Du kannst also `git push` auf dem Branch `absolut_nicht_main` ausführen und deine Commits auf `main` des entfernten Servers schieben lassen.",
              "",
              "Es gibt zwei Möglichkeiten diese Eigenschaft zu definieren. Die erste ist, einen neuen lokalen Branch von einem Remote Branch auszuchecken. Wenn man",
              "",
-              "    git checkout -b absolut_nicht_master o/main",
+              "    git checkout -b absolut_nicht_main o/main",
              "",
-              "eingibt, wird ein neuer lokaler Branch namens `absolut_nicht_master` angelegt, der `o/main` trackt."
+              "eingibt, wird ein neuer lokaler Branch namens `absolut_nicht_main` angelegt, der `o/main` trackt."
            ]
          }
        },
@ -1262,7 +1262,7 @@ exports.level = {
            "markdowns": [
              "### 私は自分でトラッキングを設定できますか？",
              "",
-              "はい、できます！あなたは、全てのブランチについて`o/main`との追跡を設定でき、もしそうした時は、同じ暗黙のプッシュ先と取り込み先を`main`として設定します。これは、例えば`tottallyNotMaster`という名前のブランチで`git push`を走らせ、作業をリモートの`main`ブランチにプッシュするといったことができるということを意味しています！",
+              "はい、できます！あなたは、全てのブランチについて`o/main`との追跡を設定でき、もしそうした時は、同じ暗黙のプッシュ先と取り込み先を`main`として設定します。これは、例えば`tottallyNotMain`という名前のブランチで`git push`を走らせ、作業をリモートの`main`ブランチにプッシュするといったことができるということを意味しています！",
              "",
              "このプロパティを設定するには2つの方法があります。一つ目は、リモートブランチのリファレンスを使用して新しいブランチをチェックアウトするというものです。例えば次のコマンドを走らせてます",
              "",
@ -1349,7 +1349,7 @@ exports.level = {
              "지난 몇개의 레슨에서 \"마법\"처럼 보일 수 있는게 하나 있었는데, git이 `main`브랜치가 `o/main`와 연관 되어있는걸 안다는 것입니다. 물론 이 두 브랜치가 이름이 비슷하기 때문에 로컬 `main`브랜치가 원격의 `main`브랜치와 연결 되어있다고 하자면 어찌 논리적으로 말이 되긴 합니다만..., 이 연결은 두가지 시나리오를 통해 뚜렷하게 확인이 됩니다:",
              "",
              "* pull 작업을 하는 도중, 커밋들은 `o/main`에 내려받아 지고 그다음 `main` 브랜치로 *merge*됩니다. merge에서 내재된 타겟은 이 연결에서 결정합니다.",
-              "* push 작업을 하는 도중, `main` 브랜치의 작업은 원격의 `main`브랜치(로컬에서 `o/main`로 표현되는)로 push 됩니다. push의 *목적지*는 master와 `o/main`의 연결에서 결정됩니다.",
+              "* push 작업을 하는 도중, `main` 브랜치의 작업은 원격의 `main`브랜치(로컬에서 `o/main`로 표현되는)로 push 됩니다. push의 *목적지*는 main와 `o/main`의 연결에서 결정됩니다.",
              ""
            ]
          }
@ -1734,13 +1734,13 @@ exports.level = {
            "markdowns": [
              "### Ali ga lahko določim sam?",
              "",
-              "Seveda se da! Narediš lahko, da bilokateri branch sledi `o/main`. V tem primeru bo imel ta branch enak impliciran cilj za push in merge kot `main`. To pomeni, da lahko poženeš `git push` na branchu poimenovanem `splohNiMaster` in pushas svoje delo na `main` branch na oddaljenem repotu!",
+              "Seveda se da! Narediš lahko, da bilokateri branch sledi `o/main`. V tem primeru bo imel ta branch enak impliciran cilj za push in merge kot `main`. To pomeni, da lahko poženeš `git push` na branchu poimenovanem `splohNiMain` in pushas svoje delo na `main` branch na oddaljenem repotu!",
              "",
              "Obstajata dva načina, da nastaviš to lastnost. Prvi je, da checkoutaš nov branch z uporabo oddaljenega brancha kot določeno referenca. Izvedba",
              "",
-              "`git checkout -b splohNiMaster o/main`",
+              "`git checkout -b splohNiMain o/main`",
              "",
-              "Ustvari nov branch imenovan `splohNiMaster` in nastavi, da sledi `o/main`."
+              "Ustvari nov branch imenovan `splohNiMain` in nastavi, da sledi `o/main`."
            ]
          }
        },