Conciseness

Nearly every line carries repo-specific, non-inferable knowledge (redirect rules, monorepo PR-number hazards, anchor-generation rules, static.rerun.io media policy), assuming Claude's competence throughout. Anchor 4 fits: minor over-explanation/trimmable spots exist — the monorepo warning is stated in the preamble and re-referenced in step 3, the static.rerun.io media rule appears three times, and a few rationale sentences ('a picture sells a new view or renderer feature far better than a bullet does') could be tightened. Not anchor 5 because of that slight redundancy; far above anchor 3, which expects genuinely unnecessary explanation.

Actionability

Fully executable, copy-paste-ready commands throughout: 'pixi run uvpy scripts/generate_changelog.py --version 0.x.y', "rg -n 'TODO\([^)]+\)' ...", the four git-diff experimental-marker probes, 'ffmpeg -ss <t> -i video.mp4 -frames:v 1 still.png', 'curl -L -H "Authorization: token $(gh auth token)" <url>', and the lint/check script invocations. Placeholders (0-XX, $PREV) are appropriately parameterized, and rules are concretely exemplified (e.g. 'rrd::optimize → rrdoptimize'). Matches anchor 5; anchor 4 would imply missing key details, and there are none of consequence.

Workflow Clarity

A clearly sequenced 5-step workflow with explicit validation gates and feedback loops: precondition checks with a hard stop ('If either precondition is not met, stop before running any release command'), 'Resolve every match before continuing' after the TODO scan, spot-check instructions for misfired PR lookups, and a 13-item 'Checklist before declaring done' ending in four executable verification commands. Matches anchor 5 (explicit validation steps, error-recovery guidance, checklist); anchor 4 would require missing checkpoints, which are not missing.

Progressive Disclosure

No bundle files exist (references/, scripts/, assets/ are absent), so all guidance lives in a single SKILL.md. Structure is good: numbered workflow steps, bolded sub-rules in step 4, a checklist, and Notes, with the one external pointer ([RELEASES.md](../../RELEASES.md)) clearly signaled and one level deep. Anchor 4 fits (good structure, minor organization gaps): the ~190-line body inlines detailed material — experimental-marker git probes and media-handling recipes — that could plausibly live in reference files. Not anchor 5, which expects a lean overview with well-signaled one-level-deep references; not anchor 3, since what is inline is workflow-critical and well-sectioned rather than clearly misplaced.

Specificity

Lists several concrete actions with explicit artifacts and paths — 'Assemble the per-PR changeset entries in docs/content/changelog/upcoming/ into a release's changeset-0-XX.md and generate the detailed CHANGELOG.md sections' — plus 'merge the upcoming/ entries'. Fits anchor 4 (several specific actions, minor gaps): polishing, validation, and emptying upcoming/ are not mentioned, keeping it below anchor 5's comprehensive coverage; it is clearly above anchor 3, which expects only 1-2 concrete actions.

Completeness

Explicitly answers both what ('Assemble the per-PR changeset entries... into a release's changeset-0-XX.md and generate the detailed CHANGELOG.md sections') and when ('Use at release time when the user wants to build or finalize the changelog or changeset for a Rerun release, or merge the upcoming/ entries'), with concrete invocation phrases. Matches anchor 5 exactly and is clearly above anchor 4, whose 'when' is less explicit or specific.

Trigger Term Quality

Includes natural trigger phrases users would say: 'build or finalize the changelog or changeset', 'merge the upcoming/ entries', 'assemble the changelog for 0.x.y', and '/assemble-changelog'. Anchor 4 (good coverage, a few natural terms missing) fits: the synonym 'release notes' is absent, which anchor 5's comprehensive synonym coverage would require; well above anchor 3's 'some relevant keywords'.

Distinctiveness Conflict Risk

Clear niche with distinct triggers: 'a Rerun release', 'changeset-0-XX.md', 'docs/content/changelog/upcoming/', '/assemble-changelog'. These are unique to this skill, matching anchor 5's minimal conflict risk; no neighboring anchor fits better since anchor 4 still implies overlap with closely related skills (e.g., generic changelog/commit-message skills), which the Rerun-specific scoping avoids.