Conciseness

The body is lean and rule-dense ("Prefer short, modern, copyable patterns. Do not write tutorial prose unless the user explicitly asks") with virtually no explanation of concepts Claude already knows — everything is library-specific @ax-llm/ax behavior. It is not a 5 because exhaustive enumerations (the forward-option precedence lists in Caching, the generated-language status notes) and niche sections (Novel F1 evaluation, Event Targets) could be trimmed or delegated to references.

Actionability

The Canonical Pattern and per-feature sections provide fully executable, copy-paste-ready TypeScript covering the common cases: forward, streamingForward, schema validation with zod, addAssert/addStreamingAssert, field processors, tool definitions via fn(), caching, step hooks, self-tuning, and error handling with named error classes. Remaining placeholders (bestIndex, { ... }) only mark user-supplied values, which is standard practice.

Workflow Clarity

"Use These Defaults" followed by the "Canonical Pattern" makes the single action (generate correct AxGen code) unambiguous, and validation/retry feedback loops (schema retries, assertion correction retries, error handling rules) are documented throughout. It is not a 5 because there is no explicit guidance sequencing when to choose among addAssert, addStreamingAssert, field processors, bestOfN, and refine — the reader must infer the selection.

Progressive Disclosure

Section headers are clear and one real bundle reference exists (references/ax-typesafe.md with a valid anchor), but it is linked only once and inconsistently — the Structured Outputs section points to the remote GitHub copy of the same document instead of the local file. Meanwhile ~600 lines of reference-grade material (18 Structured Outputs rules, Chat Log type definitions, Event Targets, session internals) are inlined in SKILL.md rather than split out, matching the "content that should be separate is inline" anchor.

Specificity

"generate correct AxGen code using @ax-llm/ax" names the domain and the trigger list enumerates many concrete capabilities ("validation, assertions, streaming assertions, field processors, step hooks, self-tuning, or structured outputs"), but these are feature topics supporting a single generate action rather than multiple distinct actions, so it falls between the several-actions (4) and comprehensive-actions (5) anchors.

Completeness

It explicitly answers both what ("helps an LLM generate correct AxGen code using @ax-llm/ax") and when ("Use when the user asks about ax(), AxGen, generators, forward(), streamingForward(), …") with concrete trigger phrases, matching the top anchor exactly; the 4 anchor's "when could be more specific" does not apply.

Trigger Term Quality

"ax(), AxGen, generators, forward(), streamingForward()" are exactly the natural terms a user of this library would say, giving good keyword coverage. It is not a 5 because common natural phrasings the body covers — "function calling", "tools", "caching", "streaming" — are missing from the trigger list.

Distinctiveness Conflict Risk

The skill occupies a clear niche (AxGen codegen for one specific library, @ax-llm/ax) and includes explicit deconfliction guidance ("For MCP clients, transports, prompts, resources, tasks, subscriptions, or authentication use ax-mcp alongside this skill"), so conflict risk with neighboring skills is minimal.