Conciseness

Nearly every token is repo-specific (exact file paths, litigated invariants, mirrored constants, canonical PR reference), so it is well above anchor 3's unnecessary-explanation profile. However, the 'Do NOT install this on production Paperclip agents' warning is stated three times (lines 11, 19, and the intro paragraph) and a few framing sentences re-explain the audience, which is minor over-explanation that could be trimmed — precisely anchor 4.

Actionability

The guidance is fully executable: exact file paths with line-anchored locations ('the response-shape branch around line 6096'), a copy-paste-ready git command ('git show --stat 4d5322c82'), a complete vitest invocation, a concrete constant to mirror ('REQUEST_CHECKBOX_CONFIRMATION_OPTION_LIMIT = 200'), and a canonical worked diff to copy plumbing from. This matches anchor 5's copy-paste-ready, common-case coverage.

Workflow Clarity

The five-step order of operations is clearly sequenced with rationale ('Do the shared contract first. It is the smallest correct change...'), an explicit validation step with the exact test set to run, an error-recovery loop ('If UI vitest fails with "act is not a function"... Re-run with NODE_ENV=test'), and a pre-merge checklist. This matches anchor 5 exactly: sequence, explicit validation, feedback loop, and checklist.

Progressive Disclosure

No bundle files exist (no references/, scripts/, or assets/), so all content lives in a single ~276-line SKILL.md. Section headers ('When to use', 'Mental model', ordered layer sections, 'Tests to run', 'Pre-merge checklist') make it well-navigable — good structure per anchor 4 — but the per-layer file-by-file touch lists could be split into one-level-deep reference files, and at over 50 lines it does not qualify for the simple-skill exception that would let it score 5 without references.

Specificity

The description names the domain ("Paperclip issue-thread interaction kind") and one concrete action ("Add ... end-to-end"), with four named existing kinds as examples, but it lists only a single action rather than the several specific actions anchor 4 requires. The named kinds are example targets, not distinct capabilities, so it sits clearly above anchor 2's generic domain-naming and below anchor 4.

Completeness

"Add a new Paperclip issue-thread interaction kind end-to-end" explicitly answers what, and "Use when repo work introduces or extends interaction cards like..." explicitly answers when with concrete trigger phrases. This matches anchor 5 exactly; anchor 4 would require the 'when' clause to be less explicit or specific.

Trigger Term Quality

Terms like "interaction cards", "request_confirmation", "checkbox confirmations", "ask_user_questions", and "suggest_tasks" are exactly what a maintainer would say when needing this skill, giving good keyword coverage. It misses a few natural variations (e.g., "issue-thread interaction", "approval card"), keeping it below anchor 5's comprehensive synonym coverage.

Distinctiveness Conflict Risk

The niche (Paperclip issue-thread interaction kinds, with four named kinds) is highly specific with distinct triggers, so overlap with other skills is minimal. It clearly matches anchor 5's clear-niche profile and not anchor 4's minor-overlap profile.