Conciseness

The body contains almost no explanation of concepts Claude already knows — it is package-specific fact throughout, so it is above anchor 2's padded verbosity. But it exceeds 'minor' trimming (anchor 4): 'as in TypeScript' is repeated roughly ten times, streaming/session behavior is covered twice (the session paragraphs inside 'Astra Session Work' — 'A stream sends a session's partial output as it arrives...' — versus the whole 'Streaming An Agent Run' section), and dense run-on policy sentences ('Declared-background native agent tools retain the imported MCP schema, handler, namespace, and raw result.') could be tightened into bullet rules. This matches anchor 3: 'mostly efficient but could be tightened'.

Actionability

Concrete elements exist — the Core Pattern snippet 'helper := ax.NewAgent("question:string -> answer:string", nil)', option keys with defaults ('clarificationShape` / `clarification_shape` defaults to `structured`'), and specific calls like 'ax.Fn(name).WithNamespace("crm")'. But guidance is incomplete (anchor 3, 'missing key details'): only one executable snippet, which conflicts with the skill's own 'Relevant API Surface' ('ax.NewAgent' vs 'axllm.NewAgent'), and runtime setup is described in JSON-ish notation ('"runtime"': a CodeRuntime, or a {"language": ...} config') rather than Go syntax. Most sections describe behavioral policy without showing the Go call shape, which keeps it below anchor 4's 'mostly executable guidance'.

Workflow Clarity

There is no ordered procedure for the skill's core task (create agent, register children, attach runtime, wire tools/MCP): the only sequencing cues are 'Register child agents before running the parent' and the 'Guardrails' do/don't list, and multi-step behavior is scattered across 'Astra Session Work', 'Where The Runtime Goes', and 'Flat Function Namespaces' with no checkpoints. This matches anchor 3's 'sequence present but checkpoints missing or implicit' — coherent thematic sections exist, so it is above anchor 2's 'poorly defined steps', but below anchor 4's 'clear sequence with most checkpoints'.

Progressive Disclosure

The body has clear section headers and real pointers to deeper material ('Runnable examples: `examples/`', 'Use the provider-backed Astra examples under `src/examples/go/generation/`, `short-agents/`, and `flows/`', 'Package API docs: `API.md` and `axir-api.json`'), but roughly 60 lines of dense behavioral policy ('Astra Session Work', 'Streaming An Agent Run', 'Flat Function Namespaces') are inlined in SKILL.md where one-level-deep reference files would serve — matching anchor 3's 'content that should be separate is inline'. Not anchor 4 because the bulk of the detail is inline rather than split out (no bundle files are present to verify the referenced paths).

Specificity

Quotes: 'Use when writing Go code with `github.com/ax-llm/ax/packages/go` for agents, child delegation, tools, MCP, citations, persistent playbook learning, stage instructions, runtime state, final typed responses, and direct-respond executor skipping.' The description names the exact domain and enumerates ten specific capability areas, matching the anchor-4 example 'Extracts text from PDF files, fills forms, converts pages to images' (several specific items, minor gaps). It is not 5 because the items are feature nouns rather than concrete action verbs, and several ('final typed responses', 'direct-respond executor skipping') are opaque internal jargon; it is well above 3's '1-2 concrete actions'.

Completeness

The explicit trigger clause 'Use when writing Go code with `github.com/ax-llm/ax/packages/go`' answers 'when' clearly, and the capability list conveys the 'what' scope, matching anchor 4 ('Has both what and when; when could be more explicit or specific'). It is not 5 because the 'what' is a feature list rather than a statement of what the skill does — the anchor-5 pattern pairs concrete action verbs with trigger phrases; the 'Use when...' presence rules out the cap of 3.

Trigger Term Quality

'writing Go code', 'agents', 'tools', 'MCP', 'citations', 'child delegation' are natural phrases a user working with this package would say — good keyword coverage matching anchor 4 ('PDF files, forms, document extraction'). It is not 5 because the back half of the list ('persistent playbook learning', 'stage instructions', 'direct-respond executor skipping') is internal jargon no user would type, and common variations like 'Golang' or 'Ax agent' are missing; it is above 3 because the leading terms are genuinely natural, not merely technical.

Distinctiveness Conflict Risk

The trigger is pinned to one language and one package path ('writing Go code with `github.com/ax-llm/ax/packages/go`'), a clear niche with minimal conflict risk matching anchor 5. Generic middle terms like 'agents' and 'MCP' could overlap other agent-framework skills, but the package pin dominates the trigger, keeping it above anchor 4's 'minor overlap risk'.