Conciseness

The body is dense with project-specific operational knowledge (exact commands, expected results, exit codes, env vars) and never explains concepts Claude already knows, but the 'invisible/excluded from the index' point is repeated across the Mindset section and two anti-patterns, and each anti-pattern's Consequence line restates its WHY (e.g. "functionally the same as it not existing" vs. "quietly disappears from every summary"). This is efficient-with-minor-trimming rather than the lean every-token-earns-its-place anchor.

Actionability

Every script has a copy-paste-ready invocation with its expected result and exit semantics, e.g. "./scripts/check-context-filenames.sh ... Expected result: `context filenames OK`, or a list of naming violations", plus the full frontmatter schema, the CONTEXT_STALENESS_THRESHOLD_DAYS knob, and five --split flag combinations. Fully executable guidance covering the common cases.

Workflow Clarity

The Procedure is a numbered sequence with an explicit validation checkpoint in step 1 ("**Verify:** the script prints nothing and exits 0"), a stricter validation step before CI gates, and an explicit feedback loop in step 4 ("**Stop if:** it reports files excluded on stderr; go back to step 2"). For a batch operation over every context file, validation and error-recovery loops are present and explicit, matching the top anchor.

Progressive Disclosure

Good structure overall: the body stays an overview, the single reference (references/regeneration-reference.md) is real, one level deep, and clearly signaled by a topic/when-to-use table, and the typology catalog is correctly delegated to the companion skill. Minor gaps: three of the four reference-table rows point to the same file with overlapping scopes, and the bundled scripts/check-wave-evidence.sh is not referenced anywhere in SKILL.md or the reference, leaving an undocumented script in the bundle. This fits 'good structure with minor organization gaps' rather than the cleanly-navigable score-5 anchor.

Specificity

The description lists multiple concrete actions covering the skill's full function set: "Regenerates the project's context index (index.yaml) from the YAML frontmatter", "grouping entries by typology", "validates that each file carries the required frontmatter fields", and "computes which active files are ready to work on, from optional typed `blocks`/`blocked-by` dependency links". This matches the anchor for comprehensive coverage of specific concrete actions rather than the score-4 anchor, which anticipates gaps in coverage.

Completeness

Both 'what' and 'when' are explicitly and concretely answered: three specific capabilities for what, and an explicit "Use when" clause with four concrete trigger scenarios, plus "Do not use it to create new context files (use create-context-file instead), to hand-edit the index, or as a substitute for fixing frontmatter at the source" for negative scoping. This clearly matches the anchor requiring explicit answers to both questions with concrete trigger phrases, not the score-4 anchor where 'when' could be more specific.

Trigger Term Quality

Natural trigger phrases users would actually say are comprehensively covered: "the index is stale", "context files were added, renamed, or removed", "a pre-commit gate blocks a commit because a context file is missing frontmatter", and "someone asks what's ready/unblocked/blocked across the context backlog", plus the concrete artifact name index.yaml. Synonyms and variants (ready/unblocked/blocked, stale/fresh, renamed/removed) are present, matching the comprehensive-coverage anchor.

Distinctiveness Conflict Risk

It carves out a clear niche (the generated context index for a specific frontmatter-governed context-file system) and actively de-conflicts from the nearest neighbor: "Do not use it to create new context files (use create-context-file instead), to hand-edit the index, or as a substitute for fixing frontmatter at the source". Triggers like "pre-commit gate blocks a commit because a context file is missing frontmatter" would not fire any other skill, matching the minimal-conflict-risk anchor.