Task 4 - validation-batch checkpoint/steering enforcement evidence

RED

Commands:

• npm test -- validation-batch-checkpoint
• npm test -- steering-batch

Observed failures before implementation:

• Batch-final checkpoint did not reject open members or require batch gates.
• Batch gate criteria/coverage checks were absent.
• Splitting a batch member did not update validation-batch membership or emit batch_updated.

GREEN / component gates

Commands:

• npm test -- validation-batch-checkpoint steering-batch steering plan-io checkpoint
• npm run typecheck
• npm run build

Observed:

• 14 test files passed, 143 tests passed.
• TypeScript strict check passed.
• Build passed.
• LOC audit: checkpoint.ts 249, steering.ts 203, steering-mutations.ts 52, validation-batch.ts 104 pure LOC.

Real-surface QA

Built CLI: dist/cli.js in fresh mktemp git repos.

Scenarios:

1. Created 3-goal plan with VB001 over G001-goal-alpha and G002-goal-beta where G002 is final.
2. Attempted to checkpoint G002-goal-beta while G001-goal-alpha remained pending.
   • Observed JSON error ULW_LOOP_VALIDATION_BATCH_OPEN.
3. Created fresh 3-goal plan with same batch and ran steer --proposals-json split on G001-goal-alpha.
   • Observed validation batch memberIds changed to G004,G002-goal-beta and removed G001-goal-alpha.

Transcript summary printed by assertions:

• batch open gate ok ULW_LOOP_VALIDATION_BATCH_OPEN
• batch split update ok G004,G002-goal-beta