SubMiner/docs/subagents/agents/codex-task99-guardrails-20260222T010930Z-m9q2.md

Agent Session: codex-task99-guardrails-20260222T010930Z-m9q2

• alias: codex-task99-guardrails
• mission: Execute TASK-99 maintainability guardrail expansion and runtime cycle checks end-to-end without commit
• status: done
• start_utc: 2026-02-22T01:09:30Z
• last_update_utc: 2026-02-22T03:01:34Z

Intent

• Load TASK-99 context from Backlog MCP and align with current guardrail scripts.
• Produce execution plan with writing-plans skill and execute via executing-plans skill.
• Parallelize independent slices (guardrail thresholds, cycle-check fixture/tests, CI/docs wiring).

Planned Files

• scripts/check-file-budgets.mjs
• scripts/check-runtime-cycles.mjs
• scripts/check-runtime-cycles.test.mjs
• .github/workflows/ci.yml
• docs/development.md

Assumptions

• Existing guardrail scripts already run in CI and can be extended without changing toolchain.
• Runtime cycle checks should target source modules involved in runtime/composer refactors.
• Baseline threshold evidence can be captured from current repository metrics.

Log

• 2026-02-22T01:09:30Z session started; loaded backlog overview/task context; setting up plan-first workflow.
• 2026-02-22T02:25:00Z wrote plan to docs/plans/2026-02-22-task-99-maintainability-guardrails-runtime-cycles.md and stored implementation plan in Backlog TASK-99.
• 2026-02-22T02:45:00Z parallel slices completed: hotspot budget guardrail enhancements and runtime cycle checker + fixtures/tests + package scripts.
• 2026-02-22T03:01:34Z integrated CI fail-fast guardrail step, added contributor guardrail docs with baselines, ran verification lanes, and prepared Backlog finalization.

Files Touched

• docs/subagents/INDEX.md
• docs/subagents/agents/codex-task99-guardrails-20260222T010930Z-m9q2.md
• docs/subagents/collaboration.md
• docs/plans/2026-02-22-task-99-maintainability-guardrails-runtime-cycles.md
• scripts/check-file-budgets.ts
• scripts/check-runtime-cycles.ts
• scripts/check-runtime-cycles.test.ts
• scripts/fixtures/runtime-cycles/acyclic/entry.ts
• scripts/fixtures/runtime-cycles/acyclic/feature.ts
• scripts/fixtures/runtime-cycles/acyclic/utils/index.ts
• scripts/fixtures/runtime-cycles/cyclic/module-a.ts
• scripts/fixtures/runtime-cycles/cyclic/module-b.ts
• scripts/fixtures/runtime-cycles/cyclic/nested/index.ts
• package.json
• .github/workflows/ci.yml
• docs/development.md
• backlog/tasks/task-99 - Expand-maintainability-guardrails-and-runtime-cycle-checks.md

Next Step

• Finalize Backlog TASK-99 AC/DoD + summary and hand off for user review (no commit).