Conciseness

The workflow is lean with no explanations of concepts Claude already knows, but the Scope refusal list duplicates the frontmatter description and the Research Discipline section reiterates workflow steps 3-6 (local docs as authority, DeepWiki as cross-check), leaving minor trims.

Actionability

Gives concrete commands (rg, git remote -v, git rev-parse --show-toplevel), the exact MCP tool mcp__deepwiki__ask_question with repoName: postgres/postgres, and a complete answer-format template; minor gaps remain, such as no example rg invocation, no example focused DeepWiki question, and the vague 'filesystem-safe filename derived from the question'.

Workflow Clarity

Seven clearly sequenced steps with an explicit stop-and-ask checkpoint in step 1 and a genuine validation feedback loop in step 6 (DeepWiki check, local re-check, revise, repeat until no material issues); the operation is non-destructive so no cap applies.

Progressive Disclosure

A single well-sectioned file (Scope, Required Workflow, Answer Format, Research Discipline) with no nested references and no bundle files, but at ~90 lines it exceeds the simple-skill threshold and inlines the full answer template plus duplicated scope text, leaving minor organization gaps.

Specificity

Lists multiple concrete actions — researching the local postgres source tree, documentation under doc/src/sgml, DeepWiki repository knowledge for postgres/postgres, saving a sourced Markdown answer to the project's markdown directory, and refusing out-of-scope questions — with comprehensive coverage and no gaps; it stays in third person.

Completeness

Explicitly answers both what ('Answer PostgreSQL core database questions by researching the local postgres source tree... DeepWiki repository knowledge') and when ('use when the user asks any PostgreSQL database behavior, internals, SQL... question') with concrete trigger phrases.

Trigger Term Quality

Good keyword coverage across 'database behavior, internals, SQL, configuration, administration, performance, storage, planner, executor, replication, or documentation', but a few natural user terms are missing (e.g., indexing, query optimization, tuning, vacuum/WAL) and no synonyms-with-extensions coverage, so it falls just short of the comprehensive anchor.

Distinctiveness Conflict Risk

Occupies a clear niche (PostgreSQL core in postgres/postgres) and explicitly refuses 'plugins, extensions maintained outside postgres/postgres, external tools, drivers, cloud services, forks, or third-party products', minimizing conflict with adjacent database or ecosystem skills.