Conciseness

The body is lean and directive with zero padding: every line is either a trigger condition or an operational rule ('Every conversion surface needs a one-line hook, a runnable example, and a clear next step'), and it explains nothing Claude already knows. This matches the 5 anchor — every token earns its place — and clearly beats the 4 anchor's 'minor instances of over-explanation' since there are none.

Actionability

For an instruction-only skill the guidance is concrete and prescriptive: measurable requirements ('one-line hook, a runnable example, and a clear next step', 'top-level summary kept to one screen', 'Append-only for dated tactical notes') and hard commands ('Never stage or commit anything under WIP/'). It stays at 4 rather than 5 because some directives lack a concrete example of the expected output — e.g. what a growth-implication annotation or a 'one-line hook' should look like — which is the 'minor gaps' of the 4 anchor.

Workflow Clarity

There is no multi-step pipeline to sequence — this is a rule-based side-channel skill, and its rules are unambiguous, including the first-use bootstrap ('create it locally on first use') and a safety guardrail ('Never stage or commit anything under WIP/'). It holds at 4 rather than 5 because the interactions between rules are left implicit (e.g. when the 'never block specialist findings' rule versus the 'cut anything that dilutes the frame' rule applies, or in what order to act during a review), which is a minor gap rather than the missing-validation gaps of the 3 anchor.

Progressive Disclosure

The skill body is ~30 lines with two clean sections ('When to activate', 'Key rules') and no external reference files needed — no references/, scripts/, or assets/ exist in the bundle — so per the under-50-lines guideline, well-organized sections alone earn the 5. The single outbound link to the persona file is clearly signaled and one level deep.

Specificity

The description enumerates several concrete surfaces — 'README conversion surfaces, quickstart, templates, release announcements, contributor funnel, story angles' and a specific path 'WIP/growth-strategy.md' — which is several specific items with only minor coverage gaps. It is not a 5 because the surfaces are named without corresponding concrete actions (what is actually done to them), keeping it at 'several specific items, minor gaps' rather than comprehensive coverage.

Completeness

The 'when' is explicit and concrete ('Activate for OSS adoption work -- README conversion surfaces, ... and any update to the maintained growth strategy at WIP/growth-strategy.md'), but the 'what' is only vaguely conveyed — 'Activate for OSS adoption work' never states what the skill actually does. It is better than the 2 anchor (which has no usable 'what' or a vague one with no 'when') because the trigger list gives it substance, but it cannot reach 4 without an explicit statement of the skill's actions.

Trigger Term Quality

Natural trigger phrases like 'quickstart', 'release announcements', 'templates', 'story angles', and 'growth strategy' are terms a user would plausibly say during OSS adoption work, giving good keyword coverage. It falls short of the 5 anchor because common synonyms and variations (e.g. 'launch post', 'docs', 'onboarding', 'landing page') are missing, but it clearly exceeds the 3 anchor's 'missing common variations' level.

Distinctiveness Conflict Risk

The niche is clear — OSS adoption/growth — with distinctive triggers like 'contributor funnel', 'story angles', and the 'WIP/growth-strategy.md' path that no other skill would claim. It does not reach 5 because generic terms like 'templates' and 'quickstart' carry minor overlap risk with documentation or scaffolding skills if uttered outside the OSS-growth context.