Conciseness

Most of the body is genuinely non-obvious package-specific behavior, but it includes unnecessary material: cross-language API digressions in a C++ skill ("add_child_agent in Python/C++, AddChildAgent in Go, addChildAgent in Java, and with_child_agent in Rust"; "All five session adapters"; Rust/Java/Python specifics in the flow-node section) and repeated "as in TypeScript" comparison qualifiers. This sits at the 3 anchor (mostly efficient, some content to trim) rather than 2, since the padding is localized rather than pervasive.

Actionability

There is one real executable snippet (the two-line "Core Pattern" with `axllm::agent` and `helper.forward`) and concrete API names (`add_child_agent(namespace, name, child)`, `agent.streaming_forward(client, values, options, handler)`), but nearly all other guidance is descriptive behavior prose with no executable examples for the many scenarios covered (MCP, streaming, child agents, runtime). This matches the 3 anchor — some concrete guidance but incomplete.

Workflow Clarity

Sections are clearly organized and the Guardrails section supplies checks ("Start from package examples for exact native syntax", "Use `provider-api` examples only when the user explicitly has provider credentials"), and ordering directives exist ("Register child agents before running the parent"). But the body is reference prose rather than a sequenced process, and validation checkpoints are implicit at best, matching the 3 anchor.

Progressive Disclosure

The body points to `API.md`, `axir-api.json`, `axir-capabilities.json`, and `examples/`, but none of these files exist in the bundle, so navigation cannot actually be followed from the skill. Meanwhile, long dense behavioral spec (the ~28-line "Astra Session Work" section) is inlined material that belongs in a reference file. This matches the 3 anchor — some structure, references signaled but not loadable from the bundle, content that should be separate is inline.

Specificity

The description names the domain ("writing C++ code with `axllm`") and lists many concrete capability areas ("agents, child delegation, tools, MCP, citations, persistent playbook learning, stage instructions, runtime state, final typed responses, and direct-respond executor skipping"). It falls short of the 5 anchor because the items are feature nouns rather than explicit concrete actions, and ahead of the 3 anchor because coverage is broad rather than 1-2 actions.

Completeness

The 'when' is explicit and concrete ("Use when writing C++ code with `axllm`"), but the 'what' is only implied by the feature list — the description never states what the skill itself does. Both are present with one weaker side, matching the 4 anchor rather than 5, which requires both clearly and explicitly stated.

Trigger Term Quality

Some natural terms users would say are present ("C++", "agents", "tools", "MCP", "citations", "child delegation"), but several others are internal package jargon no user would naturally say ("persistent playbook learning", "direct-respond executor skipping", "final typed responses", "stage instructions"), and common variations/synonyms are missing. This matches the 3 anchor (some relevant keywords, missing variations) rather than 4, which requires broadly good natural-term coverage.

Distinctiveness Conflict Risk

The trigger is pinned to a specific language and package ("C++ code with `axllm`"), forming a clear niche with minimal conflict risk against unrelated skills; the C++ qualifier also disambiguates sibling skills for the same package in other languages. Generic terms like "agents" and "MCP" appear but are dominated by the package pin.