Conciseness

The body is efficient: terse headers, bullet lists, and code with almost no re-teaching of concepts Claude already knows. Minor trimmable parts exist — the 60-line seed script and the 'When to Use' section that duplicates the frontmatter description — keeping it just short of the lean-anchor 5.

Actionability

Mostly executable guidance: complete RLS SQL policies, a runnable TypeScript seed script, a Mermaid ERD block, and concrete commands ('npx prisma-erd-generator'). Not a 5 because the seed example imports undefined project files ('./client', '../src/lib/auth', './schema') so it is not standalone copy-paste ready.

Workflow Clarity

The 'Schema Design Process' presents a clear three-step sequence (requirements to entities, relationships, cross-cutting concerns), but the workflow has no validation checkpoints — migration and RLS verification appear only as pitfall bullets ('RLS not tested — always test RLS with a non-superuser role') rather than as explicit steps. Per the rubric's database-operation rule, missing feedback loops in this context caps the score at 3.

Progressive Disclosure

Good structure: the bulk full-schema example is pushed to references/full-schema-examples.md (a real file, one level deep, no nested references, clearly signaled with an arrow pointer), and sections are well organized. Not a 5 because sizable RLS, seed, and ERD examples remain inline in SKILL.md and could be split into reference files for a leaner overview.

Specificity

Lists several specific concrete actions: 'create ERD diagrams, normalize database schemas, design table relationships, or plan schema migrations.' Not a 5 because coverage of the skill's actual capabilities (RLS policies, type generation, seed data, indexes) is absent from the description; not a 3 because it enumerates four distinct actions rather than 1-2.

Completeness

The description is structured as only a 'when' clause ('Use when the user asks to...') with no explicit statement of what the skill does — its capabilities are only implied by the verbs in the trigger list. It sits between anchor 2 ('only when is present without what') and anchor 3, earning a 3 rather than 2 because the 'when' clause is concrete and enumerates specific tasks rather than being vague.

Trigger Term Quality

Good keyword coverage with natural phrases users would say: 'ERD diagrams', 'normalize database schemas', 'design table relationships', 'plan schema migrations.' Not a 5 because common synonyms and variations are missing (e.g., 'model my data', 'database design', 'table design', ORM-specific terms like 'Prisma schema').

Distinctiveness Conflict Risk

Clear niche with distinct triggers: database schema design with ERD diagrams, normalization, table relationships, and schema migrations. These are specific, well-scoped triggers with minimal overlap risk against other skills.