Conciseness

The body is a dense router with no concept explanations Claude already knows, but several table cells embed paragraph-length advisory prose (e.g. "compare Step Functions pricing (Standard vs Express) against Lambda invocation cost at the expected volume before choosing") that could be trimmed or pushed to a reference. Matches the 4 anchor (efficient, minor over-explanation); not 3 because there is no padding, not 5 because a few routing cells editorialize.

Actionability

Concrete, directive guidance throughout: "you MUST surface the choice between AWS Step Functions and AWS Lambda Durable Functions before implementing", an explicit MUST-NOT scope boundary for the event-bus skill, and specific security actions (CloudTrail execution logging, CloudWatch alarms, least-privilege roles, Secrets Manager/ARN pointers, customer-managed KMS). Not 5 because some directives are soft ("confirm against current AWS documentation", the optional MCP-server pointer) rather than executable steps.

Workflow Clarity

A clear decision sequence is laid out: check specialized skills first, route on explicit trigger signals, then fall back to the general-reference routing table. No destructive or batch operations exist in this file, so no validation cap applies, but the body also lacks the explicit validation checkpoints and error-recovery loops of the 5 anchor — matching the 4 anchor (clear sequence, minor gaps).

Progressive Disclosure

Textbook overview structure: a "User need → Read" routing table whose 9 reference files and assets/powertools-handler.py all exist on disk, references exactly one level deep with only lateral sibling cross-links (no nested chains), plus a useful staleness note directing users to confirm version-sensitive values. Matches the 5 anchor (clear overview, well-signaled one-level-deep references, easy navigation).

Specificity

Six concrete third-person verbs ("Builds, deploys, manages, debugs, configures, and optimizes") plus named services and specific feature areas (SnapStart, function URLs, EventBridge Scheduler, Lambda layers) give comprehensive, non-generic coverage. Not 4: no coverage gaps; not below 5: every capability is concrete rather than abstract.

Completeness

Explicitly answers both questions: sentences 1-2 state what ("Builds, deploys, manages... serverless applications on AWS") and sentence 3 states when ("Triggers on mentions of...") with concrete trigger phrases. This is the 5 anchor verbatim; the missing-'Use when' cap does not apply because an equivalent explicit trigger clause is present.

Trigger Term Quality

"Triggers on mentions of Lambda, API Gateway, Step Functions, SAM templates, CDK serverless stacks, DynamoDB stream triggers, SQS event sources, cold starts, timeouts, 502/504 errors, throttling, concurrency, CORS, Powertools" covers natural terms users actually say, including raw error codes (502/504) and the guidance that it fires "even without the word 'serverless.'" Not 4: no common variation or synonym is obviously missing.

Distinctiveness Conflict Risk

Clear AWS-serverless niche with distinct triggers, reinforced by an explicit negative boundary: "Does not apply to EC2, ECS/Fargate containers, or Amplify hosting." Not 4: the exclusion boundary eliminates the main adjacent-skill overlap.