[Self-Heal] Add self-scheduling auto-repair workflow

.github/self-heal-schedule.yml

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+schedule: "0 0 * * *"
+rationale: "Bootstrap schedule (daily) set up during initial self-heal automation configuration."
+last_updated: "2024-05-23T00:00:00Z"

.github/workflows/compute-schedule.yml

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+name: Compute Schedule
+
+on:
+  schedule:
+    - cron: "0 0 * * 0" # Runs weekly
+  workflow_dispatch:
+
+concurrency:
+  group: schedule-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: write
+  pull-requests: write
+  actions: read
+
+jobs:
+  compute-schedule:
+    if: github.ref_name == github.event.repository.default_branch
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Check for open schedule PR
+        id: duplicate_check
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          open_prs=$(gh pr list --label "self-heal-schedule" --state open --json number -q 'length')
+          if [ "$open_prs" -gt 0 ]; then
+            echo "Open schedule PR exists. Skipping."
+            echo "skip=true" >> $GITHUB_OUTPUT
+          else
+            echo "skip=false" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Compute New Schedule
+        if: steps.duplicate_check.outputs.skip == 'false'
+        id: compute
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          node scripts/compute_schedule.mjs || true
+
+      - name: Create Pull Request
+        if: steps.duplicate_check.outputs.skip == 'false'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          if [ -z "$(git status --porcelain)" ]; then
+            echo "Schedule unchanged. Exiting."
+            exit 0
+          fi
+
+          git add .github/workflows/self-heal.yml .github/self-heal-schedule.yml
+
+          if [ -z "$(git diff --staged --name-only)" ]; then
+            echo "No allowed files modified. Exiting."
+            exit 0
+          fi
+
+          TITLE="[Self-Heal Schedule] Update cadence"
+          BRANCH="selfheal-schedule-$(date +%s)"
+
+          git config --global user.name "github-actions[bot]"
+          git config --global user.email "github-actions[bot]@users.noreply.github.com"
+
+          git checkout -b "$BRANCH"
+          git commit -m "$TITLE"
+          git push origin "$BRANCH"
+
+          gh pr create \
+            --title "$TITLE" \
+            --body "Triggered by schedule recomputation.
+
+          The self-heal pipeline has computed a new optimal cadence based on recent telemetry.
+
+          This PR was auto-generated by the Compute Schedule workflow.
+          - Reviewer checklist applies (see SELF_HEAL_SETUP.md)." \
+            --label "self-heal-schedule" \
+            --label "automation"

.github/workflows/self-heal.yml

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+name: Self-Heal CI
+
+on:
+  schedule:
+    - cron: "0 0 * * *" # AUTO-UPDATED
+  workflow_dispatch:
+  workflow_run:
+    workflows: ["ci"]
+    types:
+      - completed
+
+concurrency:
+  group: selfheal-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: write
+  pull-requests: write
+  actions: read
+
+jobs:
+  repair:
+    if: >
+      !startsWith(github.ref_name, 'selfheal-') &&
+      (github.event_name != 'workflow_run' || github.event.workflow_run.conclusion == 'failure') &&
+      (github.event_name != 'schedule' || github.ref_name == github.event.repository.default_branch)
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+
+      - name: Close stale selfheal PRs
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          stale_prs=$(gh pr list --label "self-heal" --state open --json number,createdAt -q '.[] | select(.createdAt < (now - 604800 | todate)) | .number')
+          for pr in $stale_prs; do
+            gh pr close "$pr" -c "Closing stale self-heal PR"
+          done
+
+      - name: Check for recent open selfheal PRs
+        id: duplicate_check
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          open_prs=$(gh pr list --label "self-heal" --state open --json number -q 'length')
+          if [ "$open_prs" -gt 0 ]; then
+            echo "Open self-heal PR exists. Skipping."
+            echo "skip=true" >> $GITHUB_OUTPUT
+          else
+            echo "skip=false" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Run Self-Heal Pipeline
+        if: steps.duplicate_check.outputs.skip == 'false'
+        id: heal
+        run: |
+          node scripts/self_heal.mjs || true
+
+      - name: Scan for secrets and Validate diff
+        if: steps.duplicate_check.outputs.skip == 'false'
+        id: validate
+        run: |
+          if [ -z "$(git status --porcelain)" ]; then
+            echo "No diff found. Exiting."
+            echo "create_pr=false" >> $GITHUB_OUTPUT
+            exit 0
+          fi
+
+          # Stage specific allowed files only
+          for path in src tests scripts package.json package-lock.json tsconfig.json; do
+            git add "$path" 2>/dev/null || true
+          done
+
+          # Ensure forbidden files are not staged
+          git reset .github/workflows/ci.yml .env 2>/dev/null || true
+
+          if [ -z "$(git diff --staged --name-only)" ]; then
+            echo "No allowed files modified. Exiting."
+            echo "create_pr=false" >> $GITHUB_OUTPUT
+            exit 0
+          fi
+
+          # Entropy / secret scan
+          if git diff --staged | grep -iE "(api_key|secret|token|password) *[=:] *['\"][a-zA-Z0-9]{20,}['\"]"; then
+            echo "Potential secret found in diff. Aborting."
+            git reset
+            echo "create_pr=false" >> $GITHUB_OUTPUT
+            exit 1
+          fi
+
+          echo "create_pr=true" >> $GITHUB_OUTPUT
+
+      - name: Create Pull Request
+        if: steps.duplicate_check.outputs.skip == 'false' && steps.validate.outputs.create_pr == 'true'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          if [ "${{ github.event_name }}" == "schedule" ]; then
+            TITLE="[Self-Heal Scheduled] Drift fixes"
+            REASON="Triggered by scheduled drift detection."
+          elif [ "${{ github.event_name }}" == "workflow_run" ]; then
+            TITLE="[Self-Heal Reactive] CI fix"
+            REASON="Triggered by CI failure on default branch."
+          else
+            TITLE="[Self-Heal Manual] Repair"
+            REASON="Triggered manually via workflow_dispatch."
+          fi
+
+          BRANCH="selfheal-$(date +%s)"
+
+          git config --global user.name "github-actions[bot]"
+          git config --global user.email "github-actions[bot]@users.noreply.github.com"
+
+          git checkout -b "$BRANCH"
+          git commit -m "$TITLE"
+          git push origin "$BRANCH"
+
+          gh pr create \
+            --title "$TITLE" \
+            --body "$REASON
+
+          This PR was auto-generated by the Self-Heal CI pipeline.
+          - Checks have been run locally to ensure successful fix.
+          - Reviewer checklist applies (see SELF_HEAL_SETUP.md).
+          - Link to chat: [Chat Link]" \
+            --label "self-heal" \
+            --label "automation"

SELF_HEAL_SETUP.md

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+# Self-Heal CI Setup
+
+This project uses an automated self-healing CI pipeline configured via GitHub Actions.
+
+## Overview
+The pipeline detects code drift and formatting issues automatically and tries to repair them.
+It creates an auto-generated Pull Request containing the repairs, which must be reviewed by a human before merging.
+
+## Triggers
+1. **Scheduled (Proactive):** Runs on a dynamically computed schedule to catch drift (e.g., dependency updates, formatting).
+2. **CI Failure (Reactive):** Runs automatically when a PR fails the main CI workflow.
+3. **Manual Dispatch:** Can be run at any time via the GitHub Actions UI.
+
+## Self-Scheduling Logic
+The schedule for the proactive trigger is periodically recomputed based on telemetry (like PR merge frequency and CI failure rates).
+This is handled by the `compute-schedule.yml` workflow, which will open a PR if the computed schedule changes.
+
+## Repair Pipeline
+The pipeline runs an idempotent 6-step repair process (`scripts/self_heal.mjs`):
+1. **Rebuild/reinstall:** `npm ci`
+2. **Lint/format auto-fix:** `npx eslint --fix . && npx prettier -w .`
+3. **Snapshot updates:** `npx vitest run -u --passWithNoTests`
+4. **Type stubs:** `npx typesync`
+5. **Dependency re-resolve:** `npm update`
+6. **Static asset regeneration:** `npm run build`
+
+After each step, a healthcheck (`scripts/healthcheck.mjs`) is run. If the healthcheck passes and there is a diff, a PR is generated.
+
+## Reviewer Checklist
+When reviewing a self-heal PR, ensure:
+- [ ] No unintended source code logic changes were introduced.
+- [ ] Snapshots reflect correct behavior, not just masking a bug.
+- [ ] Formatting changes are consistent with project standards.
+- [ ] The build passes locally.
+
+## Manual Overrides
+To override the dynamically computed schedule, you can manually update the `cron` string in `.github/workflows/self-heal.yml` (ensure the `# AUTO-UPDATED` marker is preserved) and update the rationale in `.github/self-heal-schedule.yml`.