Merge branch 'main' into tsgo-port

Author: jakebailey

.github/copilot-instructions.md

@@ -1,3 +1,32 @@
+# 🚨 CRITICAL: This Repository Is in Maintenance Mode 🚨
+
+**You MUST read and follow these instructions before taking any coding action in this repository.**
+
+This repository (`microsoft/TypeScript`) is the JavaScript-based TypeScript compiler and is **effectively closed for general development**. TypeScript 6.0 is the **last JavaScript-based release**. Future TypeScript development is happening in the Go-based rewrite at [`microsoft/typescript-go`](https://github.com/microsoft/typescript-go).
+
+See [issue #62963](https://github.com/microsoft/TypeScript/issues/62963) and the [TypeScript 7.0 progress blog post](https://devblogs.microsoft.com/typescript/progress-on-typescript-7-december-2025/) for full details.
+
+## ❌ DO NOT create coding PRs for this repository
+
+**Unless the user explicitly acknowledges the above and confirms their change falls into one of these narrow accepted categories:**
+
+- Crashes introduced in 5.9 or 6.0 that **also repro in 7.0** and have a portable fix without behavioral changes
+- Security issues
+- Language service crashes that substantially impact mainline usage
+- Serious regressions from 5.9 that impact a large proportion of users
+- Non-disruptive `lib.d.ts` changes
+
+## Required behavior for coding agents
+
+If asked to make code changes or create a PR in this repository, you **MUST**:
+
+1. Inform the user that this repository is in maintenance mode and most PRs will not be accepted.
+2. Ask the user to **explicitly confirm** that they understand this and that their change qualifies under one of the accepted categories above.
+3. **Refuse to proceed** until that acknowledgement is given.
+4. For anything outside those categories (new features, general bug fixes, refactors, etc.), direct the user to [`microsoft/typescript-go`](https://github.com/microsoft/typescript-go) instead.
+
+---
+
 # Guide for Copilot
 
 This document provides a concise guide for writing TypeScript fourslash tests and compiler tests, along with build instructions.

.github/workflows/accept-baselines-fix-lints.yaml

@@ -20,7 +20,7 @@ jobs:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           token: ${{ secrets.TS_BOT_GITHUB_TOKEN }}
-      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: 'lts/*'
 

.github/workflows/ci.yml

@@ -111,7 +111,7 @@ jobs:
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Use node version ${{ matrix.config.node-version }}
-        uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+        uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: ${{ matrix.config.node-version }}
           check-latest: true
@@ -145,7 +145,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: 'lts/*'
       - run: npm ci
@@ -159,7 +159,7 @@ jobs:
           name: coverage
           path: coverage
 
-      - uses: codecov/codecov-action@671740ac38dd9b0130fbe1cec585b89eea48d3de # v5.5.2
+      - uses: codecov/codecov-action@57e3a136b779b570ffcdbf80b3bdc90e7fab3de2 # v6.0.0
         with:
           use_oidc: ${{ !(github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork) }}
           disable_search: true
@@ -170,7 +170,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: 'lts/*'
       - run: npm ci
@@ -183,7 +183,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: 'lts/*'
       - run: npm ci
@@ -196,12 +196,12 @@ jobs:
 
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: 'lts/*'
       - run: npm ci
 
-      - uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
+      - uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5.0.4
         with:
           path: ~/.cache/dprint
           key: ${{ runner.os }}-dprint-${{ hashFiles('package-lock.json', '.dprint.jsonc') }}
@@ -218,7 +218,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: 'lts/*'
       - run: npm ci
@@ -234,7 +234,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: 'lts/*'
       - run: npm ci
@@ -248,7 +248,7 @@ jobs:
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
-      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: 'lts/*'
       - run: |
@@ -298,7 +298,7 @@ jobs:
           path: base
           ref: ${{ github.base_ref }}
 
-      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: 'lts/*'
       - run: |
@@ -337,7 +337,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: 'lts/*'
       - run: npm ci
@@ -353,7 +353,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: 'lts/*'
       - run: npm ci
@@ -374,7 +374,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: 'lts/*'
       - run: npm ci

.github/workflows/codeql.yml

@@ -46,7 +46,7 @@ jobs:
 
       # Initializes the CodeQL tools for scanning.
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@89a39a4e59826350b863aa6b6252a07ad50cf83e # v4.32.4
+        uses: github/codeql-action/init@c10b8064de6f491fea524254123dbe5e09572f13 # v4.35.1
         with:
           config-file: ./.github/codeql/codeql-configuration.yml
         # Override language selection by uncommenting this and choosing your languages
@@ -56,7 +56,7 @@ jobs:
       # Autobuild attempts to build any compiled languages (C/C++, C#, or Java).
       # If this step fails, then you should remove it and run the build manually (see below).
       - name: Autobuild
-        uses: github/codeql-action/autobuild@89a39a4e59826350b863aa6b6252a07ad50cf83e # v4.32.4
+        uses: github/codeql-action/autobuild@c10b8064de6f491fea524254123dbe5e09572f13 # v4.35.1
 
       # ℹ️ Command-line programs to run using the OS shell.
       # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
@@ -70,4 +70,4 @@ jobs:
       #     make release
 
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@89a39a4e59826350b863aa6b6252a07ad50cf83e # v4.32.4
+        uses: github/codeql-action/analyze@c10b8064de6f491fea524254123dbe5e09572f13 # v4.35.1

.github/workflows/copilot-setup-steps.yml

@@ -16,7 +16,7 @@ jobs:
     # If you do not check out your code, Copilot will do this for you.
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
       - run: npm ci
       # pull dprint caches before network access is blocked
       - run: npx hereby check-format || true

.github/workflows/insiders.yaml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: 'lts/*'
       - run: |
@@ -43,7 +43,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: 'lts/*'
           # Use NODE_AUTH_TOKEN environment variable to authenticate to this registry.

.github/workflows/lkg.yml

@@ -33,7 +33,7 @@ jobs:
         with:
           ref: ${{ inputs.branch_name }}
           token: ${{ secrets.TS_BOT_GITHUB_TOKEN }}
-      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: 'lts/*'
       - run: |

.github/workflows/new-release-branch.yaml

@@ -55,7 +55,7 @@ jobs:
           filter: blob:none # https://github.blog/2020-12-21-get-up-to-speed-with-partial-clone-and-shallow-clone/
           fetch-depth: 0 # Default is 1; need to set to 0 to get the benefits of blob:none.
           token: ${{ secrets.TS_BOT_GITHUB_TOKEN }}
-      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: 'lts/*'
       - run: |

.github/workflows/nightly.yaml

@@ -22,7 +22,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: 'lts/*'
       - run: |
@@ -43,7 +43,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: 'lts/*'
           # Use NODE_AUTH_TOKEN environment variable to authenticate to this registry.

.github/workflows/release-branch-artifact.yaml

@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: 'lts/*'
       - run: |