Conciseness

The body is dense with genuinely novel domain rules (asterisk = substituted by the player wearing 12, the August–December/January–July date-split rule, D1 target selection) and never explains concepts Claude already knows. It loses a point to repetition: the 'never insert into Games' safety rule is stated three times ('Never create or replace a game/result record', 'Never insert into `Games` from this skill', 'never insert or bulk-replace game records'), and every numbered section interleaves a near-duplicate 'For a season sheet...' variant of the single-fixture instruction. This fits anchor 4 ('efficient; minor instances of over-explanation that could be trimmed') rather than anchor 5's 'every token earns its place'.

Actionability

Guidance is fully executable: copy-paste-ready wrangler commands with the exact SELECT column lists, a preflight query, a parameterized UPDATE with a `changes()` guard, complete INSERT statements showing every Apps and Goals column with correct NULL/0 defaults, and explicit placeholder conventions (`<d1-target>`, `<appearance-inserts>.sql`). This matches anchor 5 ('fully executable; copy-paste ready code or commands covering the common cases'), not anchor 4 which would leave minor gaps in the command details.

Workflow Clarity

A clear five-step sequence (extract → resolve names → validate → write → verify) with explicit validation checkpoints throughout: preflight requiring exactly one matching game, stop-on-mismatch of summed scorer counts vs D1 home/away goals, existing Apps/Goals checks to prevent duplicates, a final user confirmation, dry-run mode, a `changes() == 1` post-update assertion, and post-write verification reads. For a database batch-writing skill this is exactly the anchor-5 pattern ('explicit validation steps; feedback loops...; checklists'), well above the cap-3 risk for missing validation.

Progressive Disclosure

There is no bundle (references/, scripts/, assets/ are absent) and the 225-line body is well organized into a preamble, Scope, and five numbered sections with clearly labeled SQL blocks, so navigation is easy. It sits at anchor 4 ('good structure; most content is appropriately placed; minor organization gaps') rather than 5 because the skill is well over 50 lines and carries two full interleaved workflows — the season-sheet variant threaded through every section (and a season-level orchestrator spec) is a natural candidate for a one-level-deep reference file, which is precisely the minor organization gap anchor 4 describes; it is not anchor 3 since no content is buried or misfiled.

Specificity

The description lists multiple concrete actions — 'Parse a photographed or scanned... fixture row or complete season sheet and add its confirmed attendance, starting XI, substitutions and Rovers scorers to the Tranmere-Web D1 database' — which is comprehensive coverage of the skill's actual writes (Games, Apps, Goals). It stays in third person ('Parse', 'add') with no fluff or over-claims, fitting the anchor-5 example of multiple specific concrete actions rather than the anchor-4 'minor gaps' case.

Completeness

Both what and when are explicitly answered: the what is the concrete parse-and-write pipeline above, and the when is a full 'Use when supplied a season-book/team-sheet image that lists player surnames and shirt numbers, especially to fill historic line-ups for already-recorded matches' clause. This mirrors the anchor-5 example structure (actions + explicit 'Use when...' with concrete triggers); anchor 4 would require a vaguer or less specific 'when' clause.

Trigger Term Quality

Natural trigger phrases cover the niche thoroughly: 'season-book/team-sheet image', 'photographed or scanned', 'player surnames and shirt numbers', 'historic line-ups', 'already-recorded matches'. These are exactly the words a user of this niche would say, with synonym variants (season-book/team-sheet, fixture row/season sheet) present, matching the anchor-5 'comprehensive coverage of natural terms including synonyms'.

Distinctiveness Conflict Risk

The niche is highly specific (Tranmere Rovers season-book ingestion into the Tranmere-Web D1 database), so it cannot plausibly trigger for a wrong skill; triggers like 'season-book image listing surnames and shirt numbers' are distinct from generic image/OCR/data-entry skills. This matches anchor 5 ('clear niche with distinct triggers; minimal conflict risk') rather than anchor 4's 'minor overlap risk with closely related skills'.