Execute the default task workflow

Procedure

1. Classify change type: docs-only, terraform-module, example-terraform, ci-workflow, mixed.
2. Read only relevant files. Start with tile docs indexes:
   • docs/repo-indexes/repo-root.md
   • docs/repo-indexes/modules.md
   • docs/repo-indexes/examples.md
   • docs/repo-indexes/github.md
3. Choose the smallest viable implementation aligned with existing patterns.
4. Implement the change.
5. Run required gates:
   • invoke validation-runner
   • for Terraform behavior changes, invoke terraform-plan
6. If a required gate fails, fix and re-run gates. Escalate only if blocked.
7. Update relevant docs/indexes when discoverability changed.
8. Add/update task log when work is meaningful (invoke task-log-update).
9. Return a concise completion summary ending with a gate recap.

Gate expectations

• A gate is PASS only when required checks complete successfully and plan intent matches expected behavior.
• A gate is FAIL when required checks fail, cannot be reviewed, or show unexpected behavior.
• If a required gate is skipped, record an explicit waiver with reason and residual risk.

Constraints

• Do not mark complete before gates pass (or waiver is recorded).
• Do not broaden scope beyond task intent without user confirmation.