Conciseness

The body is dense with Supabase-specific knowledge Claude likely lacks (CLI version requirements, RLS edge cases, deprecated auth.role()), but includes padding such as Principle 3's "Supabase issues are not always solved by retrying the same command, and the answer is not always in the logs..." and rationale restated under already-bolded checklist headers, matching score 2's 'mostly efficient but could be tightened' rather than score 3's 'every token earns its place'.

Actionability

It provides fully executable guidance — concrete commands ("supabase db pull <descriptive-name> --local --yes", "curl -so /dev/null -w %{http_code} https://mcp.supabase.com/mcp"), named MCP tools (execute_sql, get_advisors, search_docs), and copy-paste SQL policy examples contrasting deprecated vs. correct patterns — matching the score-3 'fully executable code/commands; copy-paste ready' anchor.

Workflow Clarity

The schema-change workflow is a clearly sequenced numbered list with explicit validation checkpoints ("Run advisors... Fix any issues", "Verify: supabase migration list --local"), a feedback loop (Principle 3: stop after 2-3 attempts and reconsider), and a checklist for complex processes, matching the score-3 anchor and avoiding the destructive-operation cap since validation is present.

Progressive Disclosure

Section organization is clear and the single reference is well-signaled ("MUST read when the user reports..." → references/skill-feedback.md), but the large inline security checklist is content that could be split into its own reference file, and the reference chain runs two levels deep (SKILL.md → references/skill-feedback.md → assets/feedback-issue-template.md), matching score 2's 'content that should be separate is inline' rather than score 3's 'one-level-deep references'.

Specificity

Quotes like "schema changes, migrations, security audits" and "login, logout, sessions" name concrete actions, but the description is framed as a trigger/scope enumeration ("Triggers: Supabase products (Database, Auth, Edge Functions...)") rather than a list of concrete actions the skill performs, so it falls short of the score-3 'multiple specific concrete actions' anchor and sits above score 1's 'vague or no actions'.

Completeness

The explicit "Use when doing ANY task involving Supabase. Triggers: ..." clause clearly answers *when*, but *what* the skill does is only implied via the topic enumeration rather than stated as capabilities, so per the 'score only what is explicitly stated' guideline it does not reach the score-3 'clearly answers both what AND when' anchor.

Trigger Term Quality

It gives broad natural coverage users would actually say — "Supabase", "Auth", "RLS", "supabase-js", "@supabase/ssr", "JWT", "cookies", "getSession", "getUser", "migrations" — matching the score-3 'good coverage of natural terms' anchor and exceeding score 2's 'some relevant keywords but missing common variations'.

Distinctiveness Conflict Risk

The "Use when doing ANY task involving Supabase" framing plus Supabase-only products and libraries carve a clear niche unlikely to trigger for unrelated skills, matching the score-3 'clear niche with distinct triggers' anchor.