Conciseness

The body is ~45 lines of dense, project-specific rules (Svelte 5 runes vs. Svelte 4 patterns, service/adapter/load-function boundaries, < 200 line components) with zero padding and no explanation of concepts Claude already knows. Every token carries project-specific signal, matching the lean anchor 5.

Actionability

Steps 1-2 provide copy-paste ready commands (git diff, svelte-check, eslint, vitest) and steps 3-5 give concrete, checkable criteria with a defined classification and verdict scheme. However, step 2b references "$SCOPE" which is never defined (only "$ARGUMENTS" is), leaving a minor gap that keeps it below fully executable anchor 5.

Workflow Clarity

The sequence (identify files → automated checks → architecture checks → classify → report) is clear with an explicit checklist and defined output verdict, matching anchor 4. It falls short of anchor 5 because there is no feedback loop for error recovery (e.g., what to do when svelte-check or vitest fail) and the step numbering is slightly jumbled (an inserted "2b" and a missing blank line before step 3).

Progressive Disclosure

This is a single-file skill under 50 lines with no bundle files (references/, scripts/, assets/ are absent) and well-organized sections; the architecture checklist is compact and central to every run so inlining is appropriate. Per the rubric's simple-skill guideline, this earns the full score on structure alone.

Specificity

"validates architecture, types, security, and test coverage" enumerates four concrete validation areas, going beyond 1-2 items, though it describes one verb applied to objects rather than multiple distinct actions (e.g., no mention of report/verdict generation). It matches anchor 4 (several specific items, minor coverage gaps) better than anchor 3, and not anchor 5 since the action coverage is not comprehensive.

Completeness

Both parts are present: an explicit "Use when code changes need review before merge" clause and a clear what ("validates architecture, types, security, and test coverage"). The when clause is explicit but single-phrased without concrete trigger variations, matching anchor 4 rather than anchor 5's multiple concrete trigger phrases.

Trigger Term Quality

"code changes", "review", and "merge" are natural terms users would say when needing this skill, giving good keyword coverage. Common variations such as "PR", "pull request", or "diff" are missing, which keeps it below anchor 5's comprehensive synonym coverage.

Distinctiveness Conflict Risk

The pre-merge validation framing ("code changes need review before merge") carves out a fairly distinct niche with specific validation targets. There is minor overlap risk with generic code-review skills that share the same trigger terms, so it fits anchor 4 rather than anchor 5's minimal-conflict profile.