Conciseness

The body is dense and fact-loaded — 'IDs and names are trimmed, malformed entries are skipped, valid empty content is preserved', 'observer errors are ignored' — with no padding or explanation of concepts Claude already knows. It misses score 5 because version-sensitive details ('Since 25.0.0 the text and item ids follow ...', 'a map saved by a 24.x port loads with its items') are inlined rather than quarantined in a compatibility/deprecation section.

Actionability

The Core Pattern is a concrete, executable snippet (`helper := ax.NewAgent("question:string -> answer:string", nil)` / `helper.Forward(...)`), and the guidance names specific options and callbacks (`onSkillsSearch`, `ExportRuntimeState`). Minor gaps keep it below score 5: only one code snippet is inline — the memory, observer, and catalog-search use cases from 'When To Use' have no copy-paste example, deferring to external example files.

Workflow Clarity

The body is organized thematically (lifecycle facts, catalogs, state snapshots) rather than as a sequenced workflow; there are no explicit validation checkpoints or feedback loops. The Guardrails section ('Start from package examples for exact native syntax', 'Do not interchange the two shapes') acts only as implicit checkpoints, and the skill exceeds the simple-skill exception (~60 lines, multiple distinct tasks), so it cannot score 5.

Progressive Disclosure

Sections are well-organized and deep material is clearly signaled one level deep ('Package API docs: `API.md` and `axir-api.json`', 'Runnable examples: `examples/`', 'Website gallery: https://axllm.dev/go/examples/long-agents/'). No bundle files exist alongside SKILL.md, so all references point into the package itself; the dense 'Lifecycle And State' section could arguably be split into a reference file, keeping it below score 5.

Specificity

The description names the domain ('writing Go code with `github.com/ax-llm/ax/packages/go`') and lists several concrete capability areas — 'agent memory, recall callbacks, dynamic skill discovery, loaded-skill state, and used-skill tracking'. It stops short of score 5 because these are capability nouns rather than explicit concrete actions (e.g. 'Load memories', 'Track which skills influenced a turn'), leaving minor coverage gaps.

Completeness

The 'when' is explicit ('Use when writing Go code with ... for agent memory, recall callbacks ...') and the 'what' is conveyed through the five listed capability areas. It falls short of score 5 because the 'what' is embedded inside the 'when' clause rather than stated as standalone actions the skill performs, and trigger phrases beyond the package path are limited.

Trigger Term Quality

Terms like 'Go code', 'agent memory', 'skill discovery', and the full package path `github.com/ax-llm/ax/packages/go` are exactly what a user of this framework would say. It sits between anchor 3 (some relevant keywords but missing variations) and anchor 5 (comprehensive synonyms/extensions), since it lacks common synonyms or file extensions beyond the package path.

Distinctiveness Conflict Risk

The exact package import path plus the niche feature vocabulary (loaded-skill state, used-skill tracking, recall callbacks) carve out a clear, distinctive trigger with minimal overlap risk against generic Go or memory-related skills.