Conciseness

The body does not re-explain concepts Claude already knows — nearly all of it is package-specific behavior (AxIR, distiller/executor/responder stages, Astra sessions) Claude cannot know, and there is no filler. However, dense unbroken prose blocks (notably the ~28-line "Astra Session Work" section) interleave core usage with edge-case caveats (cancellation propagation, late-result discarding, session reopen semantics) that could be tightened or moved, matching the 3 anchor (mostly efficient, some tightening possible) rather than the lean 5.

Actionability

There is one executable snippet and concrete API surface (`agent(...)`, `with_child_agent`, `streaming_forward`, `with_runtime(Box::new(runtime))`, `with_tool_module("crm", tools)`, plus explicit option names like `flat_function_namespace` and `clarification_shape`), but the bulk of the body is behavioral description with no complete, copy-paste-ready example — it defers to `examples/` via the guardrail "Start from package examples for exact native syntax". This matches the 3 anchor (some concrete guidance but incomplete) better than 4, which expects mostly executable guidance.

Workflow Clarity

The content is organized by topic (core pattern → runtime → namespaces → streaming → API surface → guardrails) rather than as a task sequence, and there are no validation checkpoints or feedback loops for the fragile operations it describes (mode switching, schema validation, cancellation). The Guardrails section partially acts as a "verify against examples first" checkpoint, placing this at the 3 anchor — structure present, but checkpoints missing or implicit.

Progressive Disclosure

Section structure is clear and external references are plainly signaled in a dedicated "Package Facts" section (`API.md`, `axir-api.json`, `axir-capabilities.json`, `examples/`), which is better than the buried or absent references of the 2 anchor. But ~30 dense lines of session/cancellation/MCP behavioral detail are inlined in SKILL.md where a reference file belongs, and none of the cited files exist in the skill's bundle (no references/, scripts/, or assets/ directories), so navigation targets cannot be resolved — keeping it below the 4 anchor.

Specificity

The description names many concrete capability areas — "agents, child delegation, tools, MCP, citations, persistent playbook learning, stage instructions, runtime state" — giving broad coverage. It falls short of the 5 anchor because the capabilities are listed as nouns rather than concrete actions, and terms like "direct-respond executor skipping" lean on internal jargon rather than plainly stated behavior.

Completeness

It has an explicit "Use when writing Rust code with `axllm` for..." trigger clause, satisfying the when; the what is only implied through the feature list rather than stated as actions the skill performs. That places it above the 3 anchor (which requires a missing or weak when) but below the 5 anchor, which demands both what and when explicitly and concretely.

Trigger Term Quality

Natural terms a user would say — "Rust", "agents", "tools", "MCP", "citations" — are present, but roughly half the list ("persistent playbook learning", "stage instructions", "final typed responses", "direct-respond executor skipping") is internal jargon users would not naturally say, and common synonyms (e.g. "ax", "LLM framework") are missing. This matches the 3 anchor (some relevant keywords, missing variations) better than 4, which expects consistently natural phrasing.

Distinctiveness Conflict Risk

"Rust code with `axllm`" carves out a clear niche with minimal conflict risk, but the broad trailing terms "agents, ... tools, MCP" could plausibly match generic Rust agent or MCP work unrelated to this package. This minor overlap with closely related skills matches the 4 anchor rather than the 5 anchor's minimal-conflict profile.