Conciseness

The body is dense and free of padding about concepts Claude already knows; nearly every sentence carries package-specific constraints (thresholds, tolerances, label counts). Minor trims are possible: the C++ aside ("C++ uses valueDescriptions on its existing field descriptors") is irrelevant to a Go skill, and triple naming-variant enumerations ("describe_values / describeValues / DescribeValues") add tokens without adding information.

Actionability

There is one real, mostly complete Go code block (the Core Pattern with NewAI/NewAx/Forward) and very concrete parameter constraints, but the native Noul/Choice/Score client and the two-program hybrid pattern — which occupy roughly 40% of the body — get no executable example, and the Core Pattern omits the import statement. The guidance defers to "start from package examples" rather than showing the call shapes.

Workflow Clarity

Selection rules ("Use Jev for typed decisions... Use native questions for probabilities... Compose a separate generative program") and Guardrails give decision guidance and pre-flight checks, but there is no explicit sequence or verification loop for the coding task — e.g., "run the no-key examples to confirm the signature works" is implied by a Guardrail, never stated as a step. The document reads as a reference, not a sequenced workflow with checkpoints.

Progressive Disclosure

References are clearly signaled in one place (Package Facts lists `API.md`, `axir-api.json`, `axir-capabilities.json`, `examples/`) and are one level deep, but none of these files exist in the skill's bundle, and the ~40-symbol "Relevant API Surface" list is exactly the bulk content that belongs in the referenced API.md rather than inlined in SKILL.md.

Specificity

The description enumerates several concrete capabilities ("boolean/class signatures, value descriptions, configurable Noul conversion, native Noul/Choice/Score, structured criteria and hybrid generation") tied to a specific package, but it reads as a jargon-dense feature inventory rather than a list of actions, and "Noul conversion" is opaque to anyone outside the package.

Completeness

Both what and when are present: an explicit "Use when writing Go code with `github.com/ax-llm/ax/packages/go`" trigger plus an enumerated capability list. It falls short of a 5 because the "what" is an opaque feature list and the when-clause is a single condition that could name more concrete triggers (e.g., mentions of Jev, typesafe signatures, or native scoring).

Trigger Term Quality

It includes good natural trigger terms a user of this library would say ("writing Go code", the package path, "Typesafe", "Score", "criteria", "hybrid generation"), but relies heavily on internal jargon ("Jev", "Noul") and misses plainer synonyms like classification or scoring.

Distinctiveness Conflict Risk

The description is pinned to one exact package path with distinctive internal terms (Jev, Noul), giving it a clear niche with minimal risk of triggering for an unrelated skill.