Conciseness

The body is mostly efficient prose but includes clear tightening opportunities: the 'Quick Reference' section (lines 30-48) restates the frontmatter description and when-to-use almost verbatim, the 'Works Well With' section lists 'moai-foundation-core' twice, and the Technology Stack bakes in time-sensitive version numbers ('Python 3.13+', 'Node.js 20+') outside any deprecated/old-patterns section. It is above 2 because it does not explain concepts Claude already knows (no 'what is REST' padding), but below 4 due to the duplicated and redundant sections.

Actionability

Every implementation pattern is rendered as prose instructions with zero code blocks — e.g. 'Define a Pydantic UserResponse model with id, email, and name fields... Implement list_users and create_user endpoints with HTTPBearer security dependency.' The details are concrete (specific class and method names, parameter values like pool_size 20, max_overflow 30, HS256, 15-minute expiry), which lifts it above 2, but nothing is executable or copy-paste ready, matching the pseudocode-instead-of-executable-code anchor at 3 rather than the 'concrete code or commands' anchor at 4.

Workflow Clarity

The body is a topic-organized pattern catalog (API design, database, microservices, caching, security, performance) rather than a sequenced workflow, and the pattern sections themselves contain no validation checkpoints. The final 'Verification' checklist partially compensates with concrete checkpoints ('grep for hardcoded secrets', 'show validation middleware'), placing this at 3: checkpoints exist but there is no sequence connecting them to the described patterns, so it does not reach the 'clear sequence with most checkpoints' anchor at 4.

Progressive Disclosure

There are no bundle files (references/, scripts/, assets/ are absent) and no references to any external files, so all ~183 lines live in a single SKILL.md. Section headers are clear, so it is above the minimal-structure anchor at 2, but content that naturally belongs in per-technology reference files (PostgreSQL, MongoDB, Redis, Consul, RabbitMQ patterns) is inlined, and at well over 50 lines the simple-skill exception for a 5 does not apply — matching the 'content that should be separate is inline' anchor at 3.

Specificity

The description lists several specific capability areas — 'API design, database integration, microservices architecture, and modern backend patterns' — which matches the anchor for several specific actions with minor gaps. It falls short of 5 because 'modern backend patterns' is generic filler and the capabilities are topic areas rather than concrete actions; it is above 3 because it names the domain plus four distinct coverage areas rather than only 1-2.

Completeness

Both 'what' ('Backend development specialist covering API design, database integration, microservices architecture, and modern backend patterns') and 'when' ('Use when designing APIs, implementing server logic, authentication, or authorization') are explicitly present, satisfying the what+when requirement. It misses 5 because the when-clause's triggers cover only APIs, server logic, and auth — omitting database, microservices, and caching work that the what-clause claims — so the 'when' could be more complete.

Trigger Term Quality

Natural terms users would say are present: 'designing APIs', 'server logic', 'authentication', 'authorization', 'database integration'. It is not 5 because common variations are missing from the description (REST, endpoints, auth, backend development as a trigger phrase); it is clearly above 3 since multiple relevant natural keywords appear rather than only some.

Distinctiveness Conflict Risk

'Backend development specialist' carves a clear niche with distinct triggers, but 'database integration' and 'microservices architecture' overlap with closely related sibling skills (the body itself lists 'moai-domain-database' and 'moai-foundation-core' as companions), matching the 'mostly distinct; minor overlap risk' anchor rather than the minimal-conflict anchor at 5.