Conciseness

The body runs ~430 lines of largely complete migration code blocks across seven sections (ORM examples, schema/data transformations, rollback, zero-downtime, cross-database), much of which restates patterns Claude already knows (createTable, addColumn, transaction try/commit/rollback); this matches score-2's "noticeably verbose; several unnecessary or padded sections." It is above 1 because the code is accurate and sectioned rather than conceptual prose, but below 3 because the volume of full implementation examples far exceeds what a lean skill needs.

Actionability

Every section provides complete, copy-paste-ready executable code with run/rollback commands inline (e.g. "npx sequelize-cli db:migrate", "npx prisma migrate deploy"), matching the score-5 anchor of fully executable examples covering common cases. It is clearly above 4, which allows minor gaps, since even multi-step zero-downtime and cross-database strategies ship complete runnable migration files.

Workflow Clarity

Multi-step processes like the zero-downtime rename ("Step 1: Add new column... Step 2: Update application... Step 3: Remove old column") and blue-green deployment (Phases 1–5) are sequenced, but the skill is fundamentally about destructive batch database operations and lacks an explicit validate-then-proceed checkpoint loop in its workflows; per the rubric, missing validation/verification steps in destructive/batch operations caps workflow_clarity at 3. The Checkpoint-Based Rollback example does include a verification check, which keeps it from dropping to 2 where validation is entirely absent.

Progressive Disclosure

A Resources section lists six references (references/orm-switching.md, references/schema-migration.md, assets/schema-migration-template.sql, scripts/test-migration.sh, etc.), but none of these bundle files actually exist in the skill directory, so the inlined ~430-line body is doing work that should live in separate files; this matches score-2's "content that clearly belongs in separate files is inlined; or references are buried." It is above 1 because there is section structure and an attempt at references, but below 3 because the references are non-existent and the bulk remains inline.

Specificity

"Execute database migrations across ORMs and platforms with zero-downtime strategies, data transformation, and rollback procedures" lists several concrete actions (migrations, zero-downtime, data transformation, rollback), matching the score-4 anchor of multiple specific actions with minor coverage gaps; it falls short of 5 because it stops at four actions rather than comprehensive coverage, and is well above 3 which expects only 1–2 concrete actions.

Completeness

It explicitly states what ("Execute database migrations across ORMs and platforms with zero-downtime strategies, data transformation, and rollback procedures") and when ("Use when migrating databases, changing schemas, performing data transformations, or implementing zero-downtime deployment strategies"), matching the score-5 anchor answering both what and when with concrete trigger phrases; it is above 4 because the 'when' clause is explicit and specific rather than weakly stated.

Trigger Term Quality

"migrating databases, changing schemas, performing data transformations, or implementing zero-downtime deployment strategies" provides good natural keyword coverage users would say, matching score-4 (good coverage, a few natural terms missing); it is above 3 because it covers multiple natural phrases beyond a single keyword, but below 5 because it lacks synonyms and concrete file extensions like .sql, schema file, or migration file.

Distinctiveness Conflict Risk

"database migrations across ORMs and platforms with zero-downtime strategies, data transformation, and rollback procedures" carves a clear niche with distinct triggers (migrations, schemas, zero-downtime deployment), matching the score-5 anchor of a clear niche with minimal conflict risk; it is above 4 because the domain is tightly scoped to database migrations rather than broad document/file handling.