Conciseness

The body is efficient — specific file paths and commands with no padding of concepts Claude already knows — but the 'Leader RPCs must be safe under at-least-once delivery' paragraph, while domain-specific and justified, could be tightened, keeping it just below the lean score-5 anchor.

Actionability

It provides copy-paste-ready commands (e.g. 'bin/generate_personhog_proto.sh', 'cd nodejs && pnpm run generate:personhog-proto', 'cargo build -p personhog-proto') and exact files to edit with per-file instructions, fully executable across the common cases.

Workflow Clarity

A clear Step 0→4 sequence with an eligibility 'stop' gate, an explicit compiler-guided feedback loop ('cargo build errors tell you exactly which trait methods are missing'), a cargo build/test verify step, and a final checklist — matching the score-5 anchor with validation checkpoints and error recovery.

Progressive Disclosure

The body is an overview that offloads bulk detail to two clearly signaled, one-level-deep references ([references/database-indexes.md], [references/proto-conventions.md]), both of which exist as real files, keeping navigation easy and content appropriately split.

Specificity

Lists multiple specific concrete actions covering the whole pipeline — 'eligibility checks, proto definition, code generation for Python and Node.js clients, Rust implementation (storage trait, postgres queries, service handler, router wiring), and index compatibility validation' — which is comprehensive coverage rather than the 1-2 actions of a score-3 anchor.

Completeness

It explicitly answers both 'what' ('Guide for adding a new RPC… Covers…') and 'when' ('Use when adding a new gRPC endpoint… migrating a Django ORM query… or extending the personhog service API') with concrete trigger phrases, matching the score-5 anchor exactly.

Trigger Term Quality

The 'Use when adding a new gRPC endpoint to personhog, migrating a Django ORM query to personhog, or extending the personhog service API' clause gives good, natural trigger phrases an engineer would actually say, falling just short of the score-5 bar that expects synonyms/extensions; it sits clearly above the score-3 'some relevant keywords' anchor.

Distinctiveness Conflict Risk

It is scoped to a clear niche — 'adding a new RPC to personhog-replica and personhog-router' — with distinct, product-specific triggers, giving minimal conflict risk with other skills.