Part **1 of 3** of the IR-driven lifecycle cutover (split from #2335 to
fit review-tool file limits; plan:
docs/plans/2026-07-18-001-refactor-ir-driven-lifecycle-cutover-plan.md,
included here).
**Scope (48 files, packages/core + docs/plans):** shared transition
policy + validator (KTD-5), IR validation hardening incl. the benchmark
capability floor, CAS review leases (KTD-4), pooled WIP capacity budgets
(KTD-9), lifecycle-trait helpers, durable IR pin/drift detection
(KTD-3), review-level creation-time preset, legacy adoption module +
census + migration 0026 + stale-binary guard (KTD-8), core-side builtin
workflow fixes (single default-IR authority, no-merge complete-column
support).
Note: `workflow-cutover.ts` (interpreter parity scaffolding) stays alive
in this PR — its last consumer dies in part 2/3, which retires it.
**Merge order:** this PR → #TBD-2 (engine) → #2335 (dashboard/top).
🤖 Generated with [Claude Code](https://claude.com/claude-code)
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added workflow-trait-driven task lifecycle transitions, including WIP
capacity pooling and workflow-aware recovery (IR pinning + drift
detection).
* Added legacy adoption/backfill for pre-cutover task states, with
unmappable rows safely parked.
* Added create-time `reviewLevel` presets to automatically configure
enabled workflow steps.
* **Bug Fixes**
* Fixed workflow moves when no workflow selection exists.
* Improved merge-blocker validation to be keyed to the workflow’s actual
review-lane identity, preventing invalid moves and misclassified
terminal states.
* **Tests**
* Added end-to-end and unit/integration coverage for workflow
validation, legacy adoption, migrations/schema guards, leases, review
presets, and transition rules.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
---------
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
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