Conciseness

Mostly efficient domain-specific content, but there is real redundancy: the tools/migration script table appears verbatim in both 'Shared tooling' and 'Tools', the legacy mini-BA move (EPIC-{nn}-ba.md -> analysis/BA-EPIC-{nn}-{slug}.md) is explained four times (Phase 0, Phase 1, Phase 3 table, Phase 4), the brownfield -> /reverse-engineering redirect appears three times, and trigger phrases are repeated across the description, 'When to invoke', and 'Keywords'. Anchor 3 ('mostly efficient but could be tightened') fits; not 2 because nearly all content is load-bearing rather than padded filler.

Actionability

Fully executable guidance throughout: exact script invocations ('python3 tools/renumber-for-merge.py --target chore/dia-migration-<date> --list-conflicts'), copy-paste git commands ('git for-each-ref --format=...'), exact commit message format ('chore(dia-migration): phase N -- {short summary}'), concrete rename mapping tables, and a runnable rollback command ('mv _devprocess/context/BACKLOG.md.preMigration _devprocess/context/BACKLOG.md'). Matches the anchor for copy-paste ready commands covering common cases.

Workflow Clarity

The phase sequence (0 through 7 plus 5b and 8) is clearly ordered with per-phase user confirmations, per-phase commits, a failure/rollback section, and a final consistency check as validation, so destructive/batch operations do have checkpoints and the cap-at-3 rule does not apply. Held at 4 rather than 5 due to concrete defects: the 'Workflow when invoked' list numbers two consecutive items '10', the intro says 'seven phases' while the workflow actually spans phases 0-8, and the branch convention contradicts itself ('chore/dia-migration-<YYYY-MM-DD>' in the pre-phase vs 'feature/dia-migration' in Safety contract rule 1).

Progressive Disclosure

The skill is a 540-line monolithic SKILL.md with no references/ directory at all; content that clearly belongs in separate files (the Phase 3 rename mapping table, the Phase-by-phase detail, the Phase 8 branch-alignment procedure) is inlined. Section headers are clear and well-organized, matching anchor 3 ('some structure... content that should be separate is inline'), but a leaner overview pointing one level deep into reference files would match anchor 5.

Specificity

The description lists multiple concrete actions with concrete details: 'detect state, strip status duplicates, rename IDs (FEATURE-NNNN -> FEAT-EE-FF, EPIC-NNN -> EPIC-NN), flatten analysis/, regenerate BACKLOG.md, update skill-name references, run /consistency-check mode A'. This matches anchor 5 (comprehensive coverage of specific concrete actions); score 4 would require minor gaps in coverage, and there are none.

Completeness

Both questions are explicitly answered: what ('Runs the migration scripts under tools/migration/ in sequence: ...') and when ('Use this skill when the user already has DIA artefacts and wants to upgrade to current conventions'), plus concrete trigger phrases. This matches anchor 5 exactly.

Trigger Term Quality

An explicit 'Triggers:' list provides natural phrases users would actually say ('migrate to DIA v2', 'upgrade DIA', 'convert backlog', 'restructure backlog', 'FEATURE to FEAT'). Falls just below anchor 5 because a few natural variants are missing: 'migrate to DIA v3' (despite v3 being named in the first sentence), 'V-Model migration', and 'update/upgrade conventions'.

Distinctiveness Conflict Risk

A clear niche (DIA version migration) with distinct triggers and an explicit negative boundary that prevents mis-invocation: 'For BROWNFIELD projects (no _devprocess/ yet, only code), use /reverse-engineering instead'. Minimal conflict risk, matching anchor 5.