From 46f37ae4fbd73b440da50f7be068aadb2478f87d Mon Sep 17 00:00:00 2001
From: Andriy Kalashnykov <AndriyKalashnykov@gmail.com>
Date: Sun, 29 Mar 2026 17:16:56 -0400
Subject: [PATCH] chore: pin actions to commit SHAs and add Skills section to
 CLAUDE.md

Pin all GitHub Actions to commit SHAs instead of mutable version tags
across ci.yml, release.yml, maintenance.yml, and all reusable workflows.
This prevents supply-chain attacks via tag hijacking.

Add the required Skills section to CLAUDE.md mapping project files
(README.md, .github/workflows/*.yml) to their respective review skills.
---
 .github/workflows/ci.yml                | 26 ++++++++++++-------------
 .github/workflows/maintenance.yml       | 10 +++++-----
 .github/workflows/release.yml           |  2 +-
 .github/workflows/reusable-release.yml  |  2 +-
 .github/workflows/reusable-test.yml     | 14 ++++++-------
 .github/workflows/reusable-validate.yml |  4 ++--
 CLAUDE.md                               | 11 +++++++++++
 7 files changed, 40 insertions(+), 29 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e82760b..557b5c9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -34,10 +34,10 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
 
       - name: Setup Node.js ${{ matrix.node }}
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
         with:
           node-version: ${{ matrix.node }}
 
@@ -68,7 +68,7 @@ jobs:
 
       - name: Cache npm
         if: matrix.pm == 'npm'
-        uses: actions/cache@v4
+        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
         with:
           path: ${{ steps.npm-cache-dir.outputs.dir }}
           key: ${{ runner.os }}-node-${{ matrix.node }}-npm-${{ hashFiles('**/package-lock.json') }}
@@ -83,7 +83,7 @@ jobs:
 
       - name: Cache pnpm
         if: matrix.pm == 'pnpm'
-        uses: actions/cache@v4
+        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
         with:
           path: ${{ steps.pnpm-cache-dir.outputs.dir }}
           key: ${{ runner.os }}-node-${{ matrix.node }}-pnpm-${{ hashFiles('**/pnpm-lock.yaml') }}
@@ -104,7 +104,7 @@ jobs:
 
       - name: Cache yarn
         if: matrix.pm == 'yarn'
-        uses: actions/cache@v4
+        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
         with:
           path: ${{ steps.yarn-cache-dir.outputs.dir }}
           key: ${{ runner.os }}-node-${{ matrix.node }}-yarn-${{ hashFiles('**/yarn.lock') }}
@@ -113,7 +113,7 @@ jobs:
 
       - name: Cache bun
         if: matrix.pm == 'bun'
-        uses: actions/cache@v4
+        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
         with:
           path: ~/.bun/install/cache
           key: ${{ runner.os }}-bun-${{ hashFiles('**/bun.lockb') }}
@@ -146,7 +146,7 @@ jobs:
       # Upload test artifacts on failure
       - name: Upload test artifacts
         if: failure()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
         with:
           name: test-results-${{ matrix.os }}-node${{ matrix.node }}-${{ matrix.pm }}
           path: |
@@ -160,10 +160,10 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
         with:
           node-version: '20.x'
 
@@ -205,10 +205,10 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
         with:
           node-version: '20.x'
 
@@ -223,10 +223,10 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
         with:
           node-version: '20.x'
 
diff --git a/.github/workflows/maintenance.yml b/.github/workflows/maintenance.yml
index 5d30084..7ad2621 100644
--- a/.github/workflows/maintenance.yml
+++ b/.github/workflows/maintenance.yml
@@ -15,8 +15,8 @@ jobs:
     name: Check Dependencies
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
         with:
           node-version: '20.x'
       - name: Check for outdated packages
@@ -26,8 +26,8 @@ jobs:
     name: Security Audit
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
         with:
           node-version: '20.x'
       - name: Run security audit
@@ -43,7 +43,7 @@ jobs:
     name: Stale Issues/PRs
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/stale@v9
+      - uses: actions/stale@5bef64f19d7facfb25b37b414482c7164d639639 # v9
         with:
           stale-issue-message: 'This issue is stale due to inactivity.'
           stale-pr-message: 'This PR is stale due to inactivity.'
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 524880a..a31c08b 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -14,7 +14,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/reusable-release.yml b/.github/workflows/reusable-release.yml
index c5df413..01cd4fe 100644
--- a/.github/workflows/reusable-release.yml
+++ b/.github/workflows/reusable-release.yml
@@ -23,7 +23,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/reusable-test.yml b/.github/workflows/reusable-test.yml
index 2f362e2..1446c57 100644
--- a/.github/workflows/reusable-test.yml
+++ b/.github/workflows/reusable-test.yml
@@ -27,10 +27,10 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
         with:
           node-version: ${{ inputs.node-version }}
 
@@ -59,7 +59,7 @@ jobs:
 
       - name: Cache npm
         if: inputs.package-manager == 'npm'
-        uses: actions/cache@v4
+        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
         with:
           path: ${{ steps.npm-cache-dir.outputs.dir }}
           key: ${{ runner.os }}-node-${{ inputs.node-version }}-npm-${{ hashFiles('**/package-lock.json') }}
@@ -74,7 +74,7 @@ jobs:
 
       - name: Cache pnpm
         if: inputs.package-manager == 'pnpm'
-        uses: actions/cache@v4
+        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
         with:
           path: ${{ steps.pnpm-cache-dir.outputs.dir }}
           key: ${{ runner.os }}-node-${{ inputs.node-version }}-pnpm-${{ hashFiles('**/pnpm-lock.yaml') }}
@@ -95,7 +95,7 @@ jobs:
 
       - name: Cache yarn
         if: inputs.package-manager == 'yarn'
-        uses: actions/cache@v4
+        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
         with:
           path: ${{ steps.yarn-cache-dir.outputs.dir }}
           key: ${{ runner.os }}-node-${{ inputs.node-version }}-yarn-${{ hashFiles('**/yarn.lock') }}
@@ -104,7 +104,7 @@ jobs:
 
       - name: Cache bun
         if: inputs.package-manager == 'bun'
-        uses: actions/cache@v4
+        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
         with:
           path: ~/.bun/install/cache
           key: ${{ runner.os }}-bun-${{ hashFiles('**/bun.lockb') }}
@@ -134,7 +134,7 @@ jobs:
 
       - name: Upload test artifacts
         if: failure()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
         with:
           name: test-results-${{ inputs.os }}-node${{ inputs.node-version }}-${{ inputs.package-manager }}
           path: |
diff --git a/.github/workflows/reusable-validate.yml b/.github/workflows/reusable-validate.yml
index 0aa1464..6612b68 100644
--- a/.github/workflows/reusable-validate.yml
+++ b/.github/workflows/reusable-validate.yml
@@ -17,10 +17,10 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
         with:
           node-version: ${{ inputs.node-version }}
 
diff --git a/CLAUDE.md b/CLAUDE.md
index 10064cc..a3053d7 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -59,3 +59,14 @@ Follow the formats in CONTRIBUTING.md:
 - Hooks: JSON with matcher and hooks array
 
 File naming: lowercase with hyphens (e.g., `python-reviewer.md`, `tdd-workflow.md`)
+
+## Skills
+
+Use the following skills when working on related files:
+
+| File(s) | Skill |
+|---------|-------|
+| `README.md` | `/readme` |
+| `.github/workflows/*.yml` | `/ci-workflow` |
+
+When spawning subagents, always pass conventions from the respective skill into the agent's prompt.