refactor(ci): replace JS PR title linter with Python commit linter

Author: ayushiahjolia

.github/workflows/ci.yml

@@ -12,22 +12,7 @@ on:
     branches: [ main ]
 
 jobs:
-  lint-commits:
-    # Note: To re-run `lint-commits` after fixing the PR title, close-and-reopen the PR.
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
-      - name: Use Node.js
-        uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
-        with:
-          node-version: 22.x
-      - name: Check PR title
-        run: |
-          node "$GITHUB_WORKSPACE/.github/workflows/lintcommit.js"
-
   build:
-    needs: lint-commits
-
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false

.github/workflows/lintcommit.js

@@ -30,6 +30,14 @@ There is a convenience script for the above that you can run from the root of th
 ops/ci-checks.sh
 ```
 
+This script also validates your commit messages against the [Conventional Commits](https://www.conventionalcommits.org/) format.
+If you have uncommitted changes, it will skip commit message validation with a warning - commit first, then re-run to validate.
+
+You can also run the commit message check independently:
+```
+python ops/lintcommit.py --local
+```
+
 ## Coding Standards
 Consistency is important for maintainability. Please adhere to the house-style of the repo, unless there's a really
 good reason to break pattern.

CONTRIBUTING.md

@@ -13,3 +13,6 @@ echo SUCCESS: typings
 # static analysis
 hatch fmt
 echo SUCCESS: linting/fmt
+
+# commit message validation
+python ops/lintcommit.py