Lifecycle-drift validation — work-dependency and milestone-completion checks

Add the remaining v1 drift checks from SPEC-119 that key on dependency and milestone-membership evidence rather than the spec↔work edge: a work item still blocked after all its blockers finished, and a milestone marked complete while it still has open members. Complements the spec-side checks in WORK-513, reusing the same helpers and reporting plumbing.

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Criteria completion

Tracking started Jul 24 — check back for trends.

Relationships

ID:SPEC-119Status:accepted

Lifecycle-drift validation for the spec–work–milestone graph

ID:WORK-513Status:ready

Lifecycle-drift validation — spec-status checks and shared suggestImplemented predicate

Priority:highComplexity:moderateMilestone:v0.30.0

ID:SPEC-117Status:accepted

Plan status vocabulary consolidation and terminal work states

ID:SPEC-114Status:accepted

Directional dependency model for plan items

ID:v0.30.0Status:planning

v0.30.0 — Plan lifecycle validation & render-stack removal

ID:WORK-515Status:ready

One-time lifecycle-drift cleanup pass over plan/

Priority:mediumComplexity:simpleMilestone:v0.30.0

main current ready

claude/v0-30-milestone-review-hg592h done claude/plan-cli-docs-review-o4nmn6 ready main ready

Acceptance Criteria

plan validate emits stale-blocked (warning) for a work item with status=blocked whose ## Blocked by targets are all achieving-terminal
plan validate emits milestone-complete-with-open-work (warning) for a milestone with status=complete that has ≥1 assigned item which is non-terminal
Both predicates use the isTerminal/isAchieving helpers from SPEC-117; no status set is re-declared in validate.ts
stale-blocked reads dependency edges via the SPEC-114 directed ## Blocked by model (not prose {% ref %} mentions or ## References)
No warning fires for a milestone with zero assigned items, or a blocked item with no ## Blocked by targets
--strict promotes the new warnings to errors
Each new issue type has a fixture-backed unit test (positive and negative case)

Approach

Work↔work linkage is the SPEC-114 directed ## Blocked by graph; milestone membership is the milestone attribute. Follow the check/reporting shape established in WORK-513 (shared helpers from enums.ts, same issue-emission path in validate.ts). These are the two non-spec v1 checks; the v2 set (retired-spec-live-work, terminal-spec-no-work, false-ready, milestone-done-not-complete) is deliberately deferred by SPEC-119 until the v1 warnings are proven non-noisy, and is out of scope here.

References

SPEC-119 — lifecycle-drift validation (this work item covers the work-dependency + milestone v1 checks)
SPEC-117 — isTerminal/isAchieving helpers
SPEC-114 — directional ## Blocked by dependency model read by stale-blocked