Conciseness

The ~1190-line body pads the retro task with large framework boilerplate — a 45-line preamble shell block, the multi-section "Voice" persona, the "Boil the Lake" essay promo, telemetry/AskUserQuestion/Contributor/Plan Status sections — plus duplicate numbering (two commands labeled "# 12") and a mislabeled cross-reference ("from Step 11" for data computed in Step 12). Several sections are unnecessary or unrelated to the task, matching the 2 anchor rather than 3's "some unnecessary explanation".

Actionability

Every step ships copy-paste-ready bash commands, argument validation with exact usage text, concrete JSON snapshot schemas, formatted output templates (leaderboard, personal card, trends tables), and binary fallback chains with explicit placeholder substitution (SKILL_NAME, OUTCOME, USED_BROWSE). Fully executable guidance covering the common cases — the 5 anchor; not 4 since gaps are negligible.

Workflow Clarity

Steps 0-14 are clearly sequenced with distinct Global and Compare flows, and validation checkpoints are explicit (invalid argument → show usage and stop; zero commits → suggest different window; no discovery binary or zero sessions → message and stop; compare only when prior window matches). Minor gaps — the duplicate "12" commands, the "from Step 11" mislabel, and absent feedback/retry loops — keep it at 4 rather than 5; the skill is read-only analysis so the destructive-operation cap does not apply.

Progressive Disclosure

This is a single monolithic file with no bundle files at all: the retro workflow, global mode, JSON schemas, and generic framework policy are all inlined. Header navigation is good and there are no nested or broken references (so above 2's "minimal structure"), but substantial content that clearly belongs in separate files is inline — the 3 anchor.

Specificity

"Analyzes commit history, work patterns, and code quality metrics", "persistent history and trend tracking", and "breaks down per-person contributions with praise and growth areas" list several concrete actions, but coverage has minor gaps — the compare-mode and cross-project global capabilities are never mentioned. This fits the 4 anchor (several specific actions, minor gaps) better than 5's comprehensive coverage and better than 3's 1-2 actions.

Completeness

The 'what' is explicit ("Analyzes commit history, work patterns, and code quality metrics... per-person contributions") and the 'when' is explicit with concrete trigger phrases ("Use when asked to 'weekly retro', 'what did we ship', or 'engineering retrospective'"). Both are clearly and concretely answered, matching the 5 anchor exactly; it exceeds 4 because the 'when' clause is fully explicit rather than merely adequate.

Trigger Term Quality

Natural quoted phrases like "weekly retro", "what did we ship", and "engineering retrospective" are exactly what a user would say, plus timing guidance "at the end of a work week or sprint". Common variations ("sprint retro", "retrospective", "what did I ship", "weekly review") are missing, so it falls just short of the 5 anchor's synonym-level coverage but is clearly above 3's partial coverage.

Distinctiveness Conflict Risk

"Weekly engineering retrospective" carves a clear niche with retro-specific triggers unlikely to fire for unrelated skills; only "what did we ship" carries slight overlap with a changelog/release-notes skill, which is minimal. Matches the 5 anchor (clear niche, distinct triggers, minimal conflict risk) rather than 4's "minor overlap risk with closely related skills".