Conciseness

The body is dense, project-specific policy with zero concept explanations Claude already knows — every line carries repo-specific rules like "Code lint reads index blobs with the current ESLint configuration". A few passages (the Git-hooks paragraph and the upgrade-guide bullet) carry detail that could be trimmed or delegated to the referenced docs, matching 'efficient; minor instances of over-explanation that could be trimmed' rather than the every-token-earns-its-place anchor at 5.

Actionability

Much of the guidance is executable with exact commands ("pnpm run change-scope --base HEAD", "pnpm run type-check", "pnpm run check:agent-contracts", "pnpm run check:ci --list") and precise ownership rules, but several steps remain directional without the command — "Run Prettier against changed documentation paths" and "Add focused Playwright evidence" — leaving minor gaps that keep it below the fully copy-paste-ready anchor at 5.

Workflow Clarity

The phases are clearly ordered (Inspect the change → Select evidence → Handle results → Pull request checks → Report) with an explicit failure feedback loop ("If a relevant check fails, diagnose that failure before widening scope. Do not skip it") and re-validation rules ("recalculate the changed paths and rerun only evidence affected by the new diff"). However, 'Select evidence' is a policy bullet list rather than an ordered procedure with checkpoints, and validation checkpoints within evidence selection are implicit, so it sits at 'clear sequence with most checkpoints present' rather than the explicit-checkpoint anchor at 5.

Progressive Disclosure

The body is under 50 lines, organized into clear sections, and acts as an overview that delegates detail to one-level-deep, purpose-signaled references — "[Testing strategy](../../../docs/testing.md) owns the change-to-evidence mapping", "follow [scripts/AGENTS.md](../../../scripts/AGENTS.md) before execution", "use [test reliability](../../../docs/test-reliability.md)" — each stating what the referenced file provides. No references/, scripts/ or assets/ bundle directories exist alongside this SKILL.md, and the per-skill guideline allows a 5 for a sub-50-line skill with well-organized sections and no need for in-bundle external references.

Specificity

The description names the domain ("an Antigravity Manager change") and two concrete actions — "Establish change scope" and "select focused validation evidence" — which matches the anchor for 1-2 concrete actions without comprehensive coverage; it does not list the several specific actions (run owning tests, type-check, lint/contract checks) that would justify a 4.

Completeness

Both parts are explicit: the what ("Establish change scope and select focused validation evidence for an Antigravity Manager change") and concrete when-triggers ("Use after implementation or before reporting work complete"), plus explicit negative triggers ("do not use for read-only analysis or semantic code review"). This matches the anchor for clearly and explicitly answering both what AND when with concrete trigger phrases, not the anchor at 4 where the 'when' could be more explicit.

Trigger Term Quality

Relevant keywords are present ("change", "validation", "implementation", "reporting work complete"), but common natural variations a user would say — "validate", "verify", "test this change", "run the checks" — are missing, fitting the 'some relevant keywords but missing common variations or synonyms' anchor rather than the good-coverage anchor at 4.

Distinctiveness Conflict Risk

The description claims a clear niche — change validation for one named project — and explicitly fences off neighboring skills ("do not use for read-only analysis or semantic code review"), giving it distinct triggers and minimal conflict risk per the top anchor rather than the 'minor overlap risk' anchor at 4.