diff --git a/.github/helper-bot/.gitignore b/.github/helper-bot/.gitignore
index eec56d637..7c1100e4d 100644
--- a/.github/helper-bot/.gitignore
+++ b/.github/helper-bot/.gitignore
@@ -1,3 +1,4 @@
 node_modules
 package-lock.json
-artifacts
\ No newline at end of file
+artifacts
+.nyc_output/
\ No newline at end of file
diff --git a/.github/helper-bot/index.js b/.github/helper-bot/index.js
index 8f2501ee8..9769c6bd8 100644
--- a/.github/helper-bot/index.js
+++ b/.github/helper-bot/index.js
@@ -1,15 +1,66 @@
 const fs = require('fs')
 const cp = require('child_process')
-const github = require('gh-helpers')()
 const pcManifestURL = 'https://launchermeta.mojang.com/mc/game/version_manifest.json'
 const changelogURL = 'https://feedback.minecraft.net/hc/en-us/sections/360001186971-Release-Changelogs'
 
+// Initialize github helper - can be mocked for testing
+let github
+try {
+  github = require('gh-helpers')()
+} catch (e) {
+  // For testing environment, create mock
+  github = { 
+    mock: true, 
+    createPullRequest: () => {}, 
+    sendWorkflowDispatch: () => {},
+    findIssue: () => {},
+    close: () => {},
+    createIssue: () => {}
+  }
+}
+
+// Testable functions
 function exec (file, args, options = {}) {
   const opts = { stdio: 'inherit', ...options }
   console.log('> ', file, args.join(' '), options.cwd ? `(cwd: ${options.cwd})` : '')
   return github.mock ? undefined : cp.execFileSync(file, args, opts)
 }
-const download = (url, dest) => exec('curl', ['-L', url, '-o', dest])
+
+function download(url, dest) {
+  return exec('curl', ['-L', url, '-o', dest])
+}
+
+function sanitizeVersion(version) {
+  return version?.replace(/[^a-zA-Z0-9_.]/g, '_')
+}
+
+function generateBranchName(edition, version) {
+  const branchNameVersion = version.replace(/[^a-zA-Z0-9]/g, '_').toLowerCase()
+  return `${edition}-${branchNameVersion}`
+}
+
+function createPRBody(edition, version, issueUrl, protocolVersion, branchName) {
+  return `
+This automated PR sets up the relevant boilerplate for Minecraft ${edition} version ${version}. Fixes ${issueUrl}.
+
+Related:
+- Issue: ${issueUrl}
+- Protocol Version: ${protocolVersion}
+<!--minecraft-data-generator-placeholder-->
+
+* You can help contribute to this PR by opening a PR against this <code branch>${branchName}</code> branch instead of <code>master</code>.
+`
+}
+
+function createWorkflowDispatch(repo, workflow, inputs) {
+  return {
+    owner: 'PrismarineJS',
+    repo,
+    workflow,
+    branch: repo === 'minecraft-data-generator' ? 'main' : 'master',
+    inputs
+  }
+}
 
 function buildFirstIssue (title, result, jarData) {
   const protocolVersion = jarData?.protocol_version || 'Failed to obtain from JAR'
@@ -43,8 +94,7 @@ async function createInitialPull (edition, issueUrl, { version, protocolVersion
   exec('npm', ['install'], { cwd: 'tools/js' })
   exec('npm', ['run', 'version', edition, version, protocolVersion], { cwd: 'tools/js' })
   exec('npm', ['run', 'build'], { cwd: 'tools/js' })
-  const branchNameVersion = version.replace(/[^a-zA-Z0-9]/g, '_').toLowerCase()
-  const branchName = `${edition}-${branchNameVersion}`
+  const branchName = generateBranchName(edition, version)
   const title = `🎈 Add Minecraft ${edition} ${version} data`
   // First, delete any existing branch
   try {
@@ -58,16 +108,7 @@ async function createInitialPull (edition, issueUrl, { version, protocolVersion
   exec('git', ['add', '--all'])
   exec('git', ['commit', '-m', title])
   exec('git', ['push', 'origin', branchName, '--force'])
-  const body = `
-This automated PR sets up the relevant boilerplate for Minecraft ${edition} version ${version}. Fixes ${issueUrl}.
-
-Related:
-- Issue: ${issueUrl}
-- Protocol Version: ${protocolVersion}
-<!--minecraft-data-generator-placeholder-->
-
-* You can help contribute to this PR by opening a PR against this <code branch>${branchName}</code> branch instead of <code>master</code>.
-`
+  const body = createPRBody(edition, version, issueUrl, protocolVersion, branchName)
   const pr = await github.createPullRequest(title, body, branchName, 'master')
   pr.branchName = branchName
   return pr
@@ -151,31 +192,19 @@ async function updateManifestPC () {
     })
     console.log('Created PR', pr)
     // Ask minecraft-data-generator to handle new update
-    const dispatchPayload = {
-      owner: 'PrismarineJS',
-      repo: 'minecraft-data-generator',
-      workflow: 'handle-mcdata-update.yml',
-      branch: 'main',
-      inputs: {
-        version: latestVersion,
-        issue_number: issue?.number,
-        pr_number: pr?.number
-      }
-    }
+    const dispatchPayload = createWorkflowDispatch('minecraft-data-generator', 'handle-mcdata-update.yml', {
+      version: latestVersion,
+      issue_number: issue?.number,
+      pr_number: pr?.number
+    })
     console.log('Sending workflow dispatch', dispatchPayload)
     await github.sendWorkflowDispatch(dispatchPayload)
     // Ask node-minecraft-protocol to handle new update
-    const nodeDispatchPayload = {
-      owner: 'PrismarineJS',
-      repo: 'node-minecraft-protocol',
-      workflow: 'update-from-minecraft-data.yml',
-      branch: 'master',
-      inputs: {
-        new_mc_version: latestVersion,
-        mcdata_branch: pr.branchName,
-        mcdata_pr_url: pr.url
-      }
-    }
+    const nodeDispatchPayload = createWorkflowDispatch('node-minecraft-protocol', 'update-from-minecraft-data.yml', {
+      new_mc_version: latestVersion,
+      mcdata_branch: pr.branchName,
+      mcdata_pr_url: pr.url
+    })
     console.log('Sending workflow dispatch', nodeDispatchPayload)
     await github.sendWorkflowDispatch(nodeDispatchPayload)
     // node-minecraft-protocol would then dispatch to mineflayer
@@ -233,4 +262,19 @@ async function updateManifestPC () {
   }
 }
 
-updateManifestPC()
+// Export for testing
+module.exports = {
+  sanitizeVersion,
+  buildFirstIssue,
+  generateBranchName,
+  createPRBody,
+  createWorkflowDispatch,
+  createInitialPull,
+  updateManifestPC,
+  setGithub: (mockGithub) => { github = mockGithub }
+}
+
+// Run main function if called directly
+if (require.main === module) {
+  updateManifestPC()
+}
diff --git a/.github/helper-bot/package.json b/.github/helper-bot/package.json
index ee4b17df1..778af5d5f 100644
--- a/.github/helper-bot/package.json
+++ b/.github/helper-bot/package.json
@@ -1,11 +1,25 @@
 {
+  "name": "minecraft-data-helper-bot",
+  "version": "1.0.0",
+  "description": "Helper bot for minecraft-data automation",
+  "main": "index.js",
   "scripts": {
-    "fix": "standard --fix"
+    "test": "mocha test/**/*.test.js",
+    "test:watch": "mocha test/**/*.test.js --watch",
+    "test:coverage": "nyc mocha test/**/*.test.js"
+  },
+  "devDependencies": {
+    "mocha": "^10.2.0",
+    "sinon": "^17.0.1",
+    "nyc": "^15.1.0"
   },
   "dependencies": {
-    "gh-helpers": "^1.0.0"
+    "gh-helpers": "*"
   },
-  "devDependencies": {
-    "standard": "^17.1.2"
-  }
+  "directories": {
+    "test": "test"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC"
 }
diff --git a/.github/helper-bot/test/index.test.js b/.github/helper-bot/test/index.test.js
new file mode 100644
index 000000000..756d53a25
--- /dev/null
+++ b/.github/helper-bot/test/index.test.js
@@ -0,0 +1,199 @@
+const sinon = require('sinon')
+const fs = require('fs')
+const assert = require('assert')
+const path = require('path')
+
+// Import the actual implementation
+const helperBot = require('../index')
+
+describe('Minecraft Data Helper Bot', function() {
+  let fsStub
+  
+  beforeEach(function() {
+    fsStub = sinon.stub(fs, 'readFileSync')
+  })
+
+  afterEach(function() {
+    sinon.restore()
+  })
+
+  describe('sanitizeVersion', function() {
+    it('should sanitize version strings correctly', function() {
+      const testCases = [
+        { input: '1.21.9', expected: '1.21.9' },
+        { input: '1.21.9-test', expected: '1.21.9_test' },
+        { input: '24w01a', expected: '24w01a' },
+        { input: 'invalid!@#$%^&*()', expected: 'invalid__________' },
+        { input: undefined, expected: undefined }
+      ]
+      
+      testCases.forEach(({ input, expected }) => {
+        const result = helperBot.sanitizeVersion(input)
+        assert.strictEqual(result, expected, `sanitizeVersion('${input}') should return '${expected}'`)
+      })
+    })
+  })
+
+  describe('generateBranchName', function() {
+    it('should create correct branch names', function() {
+      const testCases = [
+        { edition: 'pc', version: '1.21.9', expected: 'pc-1_21_9' },
+        { edition: 'bedrock', version: '1.21.9-test', expected: 'bedrock-1_21_9_test' },
+        { edition: 'pc', version: '24w01a', expected: 'pc-24w01a' },
+        { edition: 'pc', version: 'test!@#', expected: 'pc-test___' }
+      ]
+      
+      testCases.forEach(({ edition, version, expected }) => {
+        const result = helperBot.generateBranchName(edition, version)
+        assert.strictEqual(result, expected, `generateBranchName('${edition}', '${version}') should return '${expected}'`)
+      })
+    })
+  })
+
+  describe('buildFirstIssue', function() {
+    it('should create correct issue format', function() {
+      const title = 'Support Minecraft PC 1.21.9'
+      const result = {
+        id: '1.21.9',
+        type: 'release',
+        releaseTime: '2024-01-01T00:00:00Z'
+      }
+      const jarData = {
+        protocol_version: 767,
+        name: 'Minecraft 1.21.9',
+        world_version: 3955,
+        java_version: 21
+      }
+      
+      const issue = helperBot.buildFirstIssue(title, result, jarData)
+      
+      assert.strictEqual(issue.title, title)
+      assert(issue.body.includes('version **1.21.9**'), 'Should contain version')
+      assert(issue.body.includes('Protocol ID</b></td><td>767'), 'Should contain protocol version')
+      assert(issue.body.includes('Data Version</b></td><td>3955'), 'Should contain data version')
+      assert(issue.body.includes('Java Version</b></td><td>21'), 'Should contain Java version')
+      assert(issue.body.includes('2024-01-01T00:00:00Z'), 'Should contain release date')
+    })
+
+    it('should handle missing jar data', function() {
+      const title = 'Support Minecraft PC 1.21.9'
+      const result = {
+        id: '1.21.9',
+        type: 'release',
+        releaseTime: '2024-01-01T00:00:00Z'
+      }
+      
+      const issue = helperBot.buildFirstIssue(title, result)
+      
+      assert(issue.body.includes('Failed to obtain from JAR'), 'Should handle missing protocol version')
+      assert(issue.body.includes('<td>1.21.9</td>'), 'Should use result.id as name')
+    })
+  })
+
+  describe('createPRBody', function() {
+    it('should create correct PR body format', function() {
+      const edition = 'pc'
+      const version = '1.21.9'
+      const issueUrl = 'https://github.com/test/issues/123'
+      const protocolVersion = 767
+      const branchName = 'pc-1_21_9'
+      
+      const body = helperBot.createPRBody(edition, version, issueUrl, protocolVersion, branchName)
+      
+      assert(body.includes(`Minecraft ${edition} version ${version}`), 'Should contain edition and version')
+      assert(body.includes(`Fixes ${issueUrl}`), 'Should contain issue URL')
+      assert(body.includes(`Protocol Version: ${protocolVersion}`), 'Should contain protocol version')
+      assert(body.includes(`${branchName}</code> branch`), 'Should contain branch name')
+      assert(body.includes('master'), 'Should reference master branch')
+    })
+  })
+
+  describe('createWorkflowDispatch', function() {
+    it('should create correct workflow dispatch payload for minecraft-data-generator', function() {
+      const repo = 'minecraft-data-generator'
+      const workflow = 'handle-mcdata-update.yml'
+      const inputs = {
+        version: '1.21.9',
+        issue_number: 123,
+        pr_number: 456
+      }
+      
+      const result = helperBot.createWorkflowDispatch(repo, workflow, inputs)
+      
+      const expected = {
+        owner: 'PrismarineJS',
+        repo: 'minecraft-data-generator',
+        workflow: 'handle-mcdata-update.yml',
+        branch: 'main',
+        inputs: {
+          version: '1.21.9',
+          issue_number: 123,
+          pr_number: 456
+        }
+      }
+      
+      assert.deepStrictEqual(result, expected, 'Should create correct dispatch payload')
+    })
+
+    it('should create correct workflow dispatch payload for node-minecraft-protocol', function() {
+      const repo = 'node-minecraft-protocol'
+      const workflow = 'update-from-minecraft-data.yml'
+      const inputs = {
+        new_mc_version: '1.21.9',
+        mcdata_branch: 'pc-1_21_9',
+        mcdata_pr_url: 'https://github.com/test/pr/456'
+      }
+      
+      const result = helperBot.createWorkflowDispatch(repo, workflow, inputs)
+      
+      const expected = {
+        owner: 'PrismarineJS',
+        repo: 'node-minecraft-protocol',
+        workflow: 'update-from-minecraft-data.yml',
+        branch: 'master',
+        inputs: {
+          new_mc_version: '1.21.9',
+          mcdata_branch: 'pc-1_21_9',
+          mcdata_pr_url: 'https://github.com/test/pr/456'
+        }
+      }
+      
+      assert.deepStrictEqual(result, expected, 'Should create correct dispatch payload with master branch')
+    })
+  })
+
+  describe('Integration Tests', function() {
+    beforeEach(function() {
+      sinon.restore()
+      // Stub all file operations
+      sinon.stub(fs, 'readFileSync')
+      sinon.stub(fs, 'writeFileSync')
+    })
+
+    it('should handle version sanitization in full process', function() {
+      const result = helperBot.sanitizeVersion('1.21.9-test!@#')
+      assert.strictEqual(result, '1.21.9_test___', 'sanitizeVersion preserves dots and underscores')
+      
+      const branchName = helperBot.generateBranchName('pc', '1.21.9-test!@#')
+      assert.strictEqual(branchName, 'pc-1_21_9_test___', 'generateBranchName replaces non-alphanumeric')
+    })
+
+    it('should create consistent branch names and PR bodies', function() {
+      const edition = 'pc'
+      const version = '1.21.9'
+      const branchName = helperBot.generateBranchName(edition, version)
+      const prBody = helperBot.createPRBody(edition, version, 'test-url', 767, branchName)
+      
+      assert(prBody.includes(branchName), 'PR body should reference the generated branch name')
+      assert.strictEqual(branchName, 'pc-1_21_9', 'Branch name should be consistent')
+    })
+
+    it('should create workflow dispatch payloads with correct branch names', function() {
+      const generatorDispatch = helperBot.createWorkflowDispatch('minecraft-data-generator', 'test.yml', {})
+      const protocolDispatch = helperBot.createWorkflowDispatch('node-minecraft-protocol', 'test.yml', {})
+      
+      assert.strictEqual(generatorDispatch.branch, 'main', 'minecraft-data-generator should use main branch')
+      assert.strictEqual(protocolDispatch.branch, 'master', 'node-minecraft-protocol should use master branch')
+    })
+  })
+})
\ No newline at end of file
diff --git a/.github/workflows/update-helper.yml b/.github/workflows/update-helper.yml
index 914a40428..f40f8a6fd 100644
--- a/.github/workflows/update-helper.yml
+++ b/.github/workflows/update-helper.yml
@@ -10,11 +10,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repository
-      uses: actions/checkout@master
+      uses: actions/checkout@v4
     - name: Set up Node.js
-      uses: actions/setup-node@master
+      uses: actions/setup-node@v4
       with:
-        node-version: 22.0.0
+        node-version: 22.x
     - name: Install Github Actions toolkit
       run: npm i
       working-directory: .github/helper-bot