Clean up YAML files: lowercase booleans, trailing whitespace, and yamllint integration

.github/workflows/build_and_test_maxtext.yml

@@ -119,7 +119,7 @@ jobs:
     needs: analyze_code_changes
     # Run if either tests or notebooks need to run
     if: |
-      needs.analyze_code_changes.outputs.run_tests == 'true' || 
+      needs.analyze_code_changes.outputs.run_tests == 'true' ||
       needs.analyze_code_changes.outputs.run_notebooks == 'true'
     uses: ./.github/workflows/build_package.yml
     with:
@@ -318,4 +318,4 @@ jobs:
       actions: 'read'
     with:
       failed_run_id: '${{ github.run_id }}'
-    secrets: inherit
+    secrets: inherit

.github/workflows/gemini-dispatch.yml

@@ -24,7 +24,7 @@ defaults:
 jobs:
   debugger:
     # Debug mode: with a repository variable called DEBUG to true
-    if: |- 
+    if: |-
      ${{ fromJSON(vars.DEBUG || vars.ACTIONS_STEP_DEBUG || false) }}
     runs-on: 'ubuntu-latest'
     permissions:
@@ -39,7 +39,7 @@ jobs:
           DEBUG_event__pull_request__author_association: '${{ github.event.pull_request.author_association }}'
           DEBUG_event__review__author_association: '${{ github.event.review.author_association }}'
           DEBUG_event: '${{ toJSON(github.event) }}'
-        run: |- 
+        run: |-
           env | grep '^DEBUG_'
 
   dispatch:

.github/workflows/gemini-investigate.yml

@@ -36,7 +36,7 @@ jobs:
           PR_NUMBER: ${{ github.event.workflow_run.pull_requests[0].number || github.event.pull_request.number || github.event.issue.number }}
         run: |
           mkdir -p .gemini
-          
+
           # Determine target run ID
           if [ -z "$RUN_ID" ]; then
             # If SHA/BRANCH are missing (e.g. on issue_comment event), fetch them from PR
@@ -45,22 +45,22 @@ jobs:
               SHA=$(gh pr view "$PR_NUMBER" --repo "$REPO" --json headRefOid --jq '.headRefOid' 2>/dev/null || true)
               BRANCH=$(gh pr view "$PR_NUMBER" --repo "$REPO" --json headRefName --jq '.headRefName' 2>/dev/null || true)
             fi
-            
+
             # Fallback to finding the latest failed run for this PR's specific commit
             if [ -n "$SHA" ]; then
               echo "Searching for failed runs for commit: $SHA"
               RUN_ID=$(gh run list --workflow "MaxText Package Tests" --status failure --commit "$SHA" --limit 1 --json databaseId --jq '.[0].databaseId' --repo "$REPO")
             fi
-            
+
             # Fallback to branch if commit-specific run wasn't found
             if [ -z "$RUN_ID" ] && [ -n "$BRANCH" ]; then
               echo "Searching for failed runs on branch: $BRANCH"
               RUN_ID=$(gh run list --workflow "MaxText Package Tests" --status failure --branch "$BRANCH" --limit 1 --json databaseId --jq '.[0].databaseId' --repo "$REPO")
             fi
           fi
-          
+
           echo "Gathering logs for failed run: $RUN_ID"
-          
+
           if [ -n "$RUN_ID" ]; then
             # Retrieve only the failing lines/jobs to avoid token limit overhead
             gh run view "$RUN_ID" --log-failed --repo "$REPO" > .gemini/failed_logs.txt || true

.github/workflows/gemini-invoke.yml

@@ -39,7 +39,7 @@ jobs:
           permission-pull-requests: 'write'
 
       - name: 'Run Gemini CLI'
-      # Trigger Gemini with context 
+      # Trigger Gemini with context
         id: 'run_gemini'
         uses: 'google-github-actions/run-gemini-cli@main'
         env:

.github/workflows/gemini-review.yml

@@ -60,7 +60,7 @@ jobs:
           ADDITIONAL_CONTEXT: '${{ inputs.additional_context }}'
 
       - name: 'Run Gemini pull request review'
-        # reviews code with detailed set of instructions for the Gemini 
+        # reviews code with detailed set of instructions for the Gemini
         uses: 'google-github-actions/run-gemini-cli@v0'
         id: 'gemini_pr_review'
         env:
@@ -71,7 +71,7 @@ jobs:
           PULL_REQUEST_NUMBER: '${{ github.event.pull_request.number || github.event.issue.number }}'
           REPOSITORY: '${{ github.repository }}'
           ADDITIONAL_CONTEXT: '${{ inputs.additional_context }}'
-        with:          
+        with:
           gcp_location: '${{ vars.GOOGLE_CLOUD_LOCATION }}'
           gcp_project_id: '${{ vars.GOOGLE_CLOUD_PROJECT }}'
           gcp_service_account: '${{ vars.SERVICE_ACCOUNT_EMAIL }}'

.github/workflows/pypi_release.yml

@@ -42,7 +42,7 @@ jobs:
     needs: [release_approval]
     uses: ./.github/workflows/build_and_test_maxtext.yml
     secrets: inherit
-      
+
   publish_maxtext_package_to_pypi:
     name: Publish MaxText package to PyPI
     needs: [build_and_test_maxtext_package]

.github/workflows/run_jupyter_notebooks.yml

@@ -73,15 +73,15 @@ jobs:
           # 2. Install MaxText package and all the post training dependencies
           uv pip install ${maxtext_wheel}[tpu-post-train] --resolution=lowest
           install_tpu_post_train_extra_deps
-          
+
           python3 -m pip freeze
       - name: Run Post-Training Notebooks
         shell: bash
         env:
           HF_TOKEN: ${{ secrets.HF_TOKEN }}
           MAXTEXT_INSTALLED: ${{ inputs.maxtext_installed }}
           # TODO: Fix evaluation in sft_qwen3_demo.ipynb and remove this env variable
-          RUN_EVALUATION: "False"
+          RUN_EVALUATION: "false"
         run: |
           if [ "${MAXTEXT_INSTALLED}" == "true" ]; then
             # Move to the directory where code is baked into the image. See the Dockerfile.

.github/workflows/run_tests_against_package.yml

@@ -86,9 +86,9 @@ jobs:
         TF_FORCE_GPU_ALLOW_GROWTH: ${{ inputs.tf_force_gpu_allow_growth }}
         TPU_SKIP_MDS_QUERY: ${{ inputs.device_type == 'cpu' && '1' || '' }}
         MAXTEXT_PACKAGE_EXTRA: >-
-          ${{ 
-            !contains(inputs.pytest_marker, 'not post_training') && 'tpu-post-train' 
-            || (inputs.device_type == 'cpu' && 'tpu' || inputs.device_type) 
+          ${{
+            !contains(inputs.pytest_marker, 'not post_training') && 'tpu-post-train'
+            || (inputs.device_type == 'cpu' && 'tpu' || inputs.device_type)
           }}
         ALLOW_MULTIPLE_LIBTPU_LOAD: ${{ inputs.device_type == 'cpu' && 'true' || '' }} # bypass /tmp/libtpu_lockfile check for cpu tests, which don't actually use accelerators (to allow concurrency)
       options: ${{ inputs.container_resource_option }}
@@ -171,7 +171,7 @@ jobs:
           else
             SPLIT_ARGS=""
           fi
-          
+
           # Setup substitution: If manually updating HLO, skip tests execution and run only the update script instead!
           if [ "${INPUTS_IS_UPDATE_HLO}" == "true" ]; then
             python3 tests/utils/update_hlo_references.py

.pre-commit-config.yaml

@@ -61,3 +61,9 @@ repos:
         additional_dependencies: [mdformat-myst, mdformat-ruff]
         files: (docs/.)
         exclude: docs/guides/checkpointing_solutions.md|docs/guides.md
+
+  - repo: https://github.com/adrienverge/yamllint
+    rev: v1.35.0
+    hooks:
+      - id: yamllint
+        types: [yaml]

.yamllint

@@ -0,0 +1,8 @@
+extends: relaxed
+rules:
+  line-length: disable
+  comments: disable
+  indentation: disable
+  commas: disable
+  colons: disable
+  empty-lines: disable