Conciseness

The body is lean and efficient: every section (Goal, Workflow, Requirements, Release Story Format, Notes) carries non-obvious project-specific facts like `SPACEBOT_RELEASE_MARKETING_COPY_FILE` and the `scripts/release-tag.sh` behavior, with no explanation of concepts Claude already knows. It matches the 5 anchor ('lean and efficient; assumes Claude's competence; every token earns its place') and is clearly above the 4 anchor, which requires trimmable over-explanation.

Actionability

Guidance is mostly copy-paste executable — `marketing_file="$(mktemp)"`, `SPACEBOT_RELEASE_MARKETING_COPY_FILE="$marketing_file" cargo bump <patch|minor|major|X.Y.Z>`, `git tag --list "v*" --sort=-v:refname | head -n 5`. It falls short of the 5 anchor because the core creative deliverable (the release story) has structural guidance and an external reference to the "v0.2.0 narrative" but no worked example in the skill itself, and the bump-level argument is an unresolved placeholder — matching the 4 anchor ('concrete code or commands with minor gaps').

Workflow Clarity

The four-step workflow is clearly sequenced with a pre-flight check ("Ensure the working tree is clean"), a concrete harness invocation, and an explicit verification step ("Confirm commit contains `Cargo.toml`, `Cargo.lock` (if present), and `CHANGELOG.md`"; "Confirm tag was created"), so it exceeds the 3 anchor's missing checkpoints. It stops short of the 5 anchor because there is no error-recovery feedback loop telling Claude what to do if verification fails (e.g., tag missing or commit contents wrong).

Progressive Disclosure

Per the rubric's simple-skill guideline (under 50 lines of body content, single task, no external bundle files needed), well-organized sections suffice. The skill is cleanly sectioned with clear headers, and every referenced path (`scripts/release-tag.sh`, `CHANGELOG.md`) is part of the target project workflow rather than a bundle file needing navigation — matching the 5 anchor's clear, easy-to-navigate structure.

Specificity

The description lists several concrete actions — "writes a launch-style release story from the actual change set", "runs `cargo bump`", and notes/marketing copy landing "together in `CHANGELOG.md`" — which is specific and executable language. It falls short of the 5 anchor only because coverage of the full capability set (e.g., tag creation, verification) is not comprehensive, and it is clearly above the 3 anchor's '1-2 concrete actions, not comprehensive'.

Completeness

It explicitly answers 'when' with "Use this skill when preparing a release bump or updating release notes" and 'what' with concrete statements of the story-writing and `cargo bump`/changelog behavior. Both are explicit with concrete trigger phrases, matching the 5 anchor; the 4 anchor would require the 'when' to be less explicit, which it is not.

Trigger Term Quality

Natural phrases users would say are present — "release bump", "updating release notes", "CHANGELOG.md" — alongside the tool-specific "`cargo bump`". It misses common synonyms like "version bump", "prepare a release", or "tag a release", so it fits the 4 anchor ('good keyword coverage; a few natural terms missing') rather than the 5 anchor's comprehensive synonym coverage.

Distinctiveness Conflict Risk

The description occupies a clear niche — cargo/Rust release bumping with GitHub-generated notes and marketing copy in `CHANGELOG.md` — with triggers that would not plausibly fire for an unrelated skill. It matches the 5 anchor ('clear niche with distinct triggers; minimal conflict risk').