z3/.github/workflows/build-warning-fixer.md

name	description	on	permissions	tracker-id	safe-outputs	network	tools	timeout-minutes	strict	steps
Clang-Tidy Warning Fixer	Analyzes clang-tidy warning artifacts and files GitHub issues with proposed fixes as git diffs	workflow_run workflow_dispatch skip-if-match workflows types branches Clang-Tidy Warning Report completed master is:pr is:open in:title "[clang-tidy]"	actions contents issues pull-requests copilot-requests read read read read write	clang-tidy-warning-fixer	report-failure-as-issue create-issue missing-tool noop false title-prefix labels max [clang-tidy] code-quality clang-tidy automation 1 create-issue true report-as-issue false	defaults	github bash toolsets default actions :*	90	true	name uses with Checkout repository actions/checkout@v7.0.1 persist-credentials false

Clang-Tidy Warning Fixer

You are an AI agent that uses pre-collected clang-tidy warning artifacts, proposes conservative fixes, and creates a GitHub issue with ready-to-apply git diffs.

Current Context

• Repository: ${{ github.repository }}
• Workflow: ${{ github.workflow }}
• Workspace: ${{ github.workspace }}
• Trigger run ID: ${{ github.event.workflow_run.id }}
• Expected source workflow: clang-tidy-warning-report.yml (Clang-Tidy Warning Report)
• Local artifact extraction path: /tmp/gh-aw/clang-tidy-warning-report

Your Task

0. Verify repository target

This workflow is only for Z3Prover/z3.

If ${{ github.repository }} is not Z3Prover/z3, call noop immediately with a short explanation.

1. Download artifacts from clang-tidy-warning-report.yml

Use GitHub MCP tools (not gh) to retrieve artifacts from the triggering run.

1. Determine source run ID:
   • If ${{ github.event.workflow_run.id }} is present, use it.
   • For manual dispatch, call github-mcp-server-actions_list (list_workflow_runs) for workflow clang-tidy-warning-report.yml and select the latest completed run.
2. List run artifacts with github-mcp-server-actions_list (list_workflow_run_artifacts).
3. Find artifact clang-tidy-warning-report-<run_id>.
4. Get the download URL with github-mcp-server-actions_get (download_workflow_run_artifact).
5. Download and extract locally:

mkdir -p /tmp/gh-aw/clang-tidy-warning-report
curl -L "$ARTIFACT_URL" -o /tmp/gh-aw/clang-tidy-warning-report/artifact.zip
unzip -o /tmp/gh-aw/clang-tidy-warning-report/artifact.zip -d /tmp/gh-aw/clang-tidy-warning-report
ls -la /tmp/gh-aw/clang-tidy-warning-report

Expect files such as warnings.txt, build.log, configure.log, combined.log, and status.txt.

2. Extract actionable diagnostics

Analyze artifact files from this run:

• /tmp/gh-aw/clang-tidy-warning-report/warnings.txt
• /tmp/gh-aw/clang-tidy-warning-report/build.log
• /tmp/gh-aw/clang-tidy-warning-report/combined.log
• /tmp/gh-aw/clang-tidy-warning-report/status.txt

Use commands like:

grep -nE 'warning:|error:|clang-tidy' /tmp/gh-aw/clang-tidy-warning-report/combined.log | head -300

Classify findings into:

• clang-tidy warnings
• compiler warnings
• compiler or build errors

Prioritize findings that are:

• localized to one file
• straightforward to fix safely
• unlikely to change behavior
• validated by rebuilding

Skip findings that require design changes, broad refactors, or uncertain semantic changes.

3. Investigate the affected code

For each high-confidence finding:

1. Locate the file and exact lines.
2. Read the surrounding code.
3. Confirm the warning is real and not already fixed.
4. Prefer the smallest possible change.

Examples of usually safe fixes:

• removing dead or unused locals
• adding override where the class already overrides a virtual method
• adding [[maybe_unused]] for intentionally unused parameters or variables
• replacing obvious null literal usage with nullptr
• applying other trivial clang-tidy modernizations that do not alter behavior

Do not change behavior, APIs, ownership, solver logic, or performance-sensitive code unless the fix is obviously semantics-preserving.

4. Draft fixes conservatively as patch proposals

For each high-confidence warning, draft the smallest safe change as a unified diff proposal.

Rules:

• fix only warnings you fully understand
• do not batch unrelated cleanups
• preserve formatting and local style
• if a finding is uncertain, skip it instead of guessing
• prefer one focused diff hunk per warning
• do not propose broad refactors or behavioral changes

5. Document proposed fixes as git diffs

For each proposed fix, include:

• file path
• warning being fixed
• rationale
• a fenced unified diff block (```diff ... ```)

Also include one consolidated patch section that can be directly applied:

git apply - << 'EOF'
[all diff hunks]
EOF

6. Create a GitHub issue with fixes

Create exactly one issue using create-issue when there are actionable warnings.

Issue content must include:

• source workflow run link (clang-tidy-warning-report.yml run ID)
• summary counts by warning type
• list of skipped warnings with reasons
• proposed fixes as unified diffs (full diff text, not prose only)
• short assignment-ready checklist for Copilot (one checkbox per proposed fix)

If no actionable warnings are found, or artifacts are missing/corrupt, call noop with a concise explanation.

Guidelines

• Be conservative and high-confidence only.
• Prefer no issue over risky or speculative patch suggestions.
• Keep fixes surgical and easy to review.
• Focus only on diagnostics produced by the referenced clang-tidy-warning-report.yml run.