Conciseness

The body is mostly efficient domain knowledge Claude would not know (manifest field semantics, path-variable hydration rules), but the same security rules are restated repeatedly across sections: untrusted-content handling appears in Workflow steps 5-6, Local Test Flow, and Before Handoff, and 'reject absolute paths, `..` traversal, and symlinks that escape the root' is repeated four-plus times (Extension Shape for `contextFileName`/`hooks`/`lspServers`, Local Test Flow, Before Handoff). This fits 'mostly efficient but includes some unnecessary explanation or could be tightened' rather than the 4-anchor's 'minor instances'.

Actionability

Every step carries a copy-paste-ready command: `qwen extensions new "$extension_path" "$template"`, `printf 'y\n' | qwen extensions link "$extension_path"`, `cd -- "$extension_path" && npm install --ignore-scripts`, `npm run build`, and the `node -e "JSON.parse(...)"` validation one-liner, including correct `--` argument guarding. This is fully executable guidance covering the common cases, matching the top anchor.

Workflow Clarity

The main workflow is a numbered 11-step sequence with explicit validation checkpoints (Before Handoff checklist, After Linking verification, Linking Approval Procedure), explicit stop-on-failure rules ("If any command in the workflow fails, stop and report the error to the user... Do not proceed"), and fix-and-re-check feedback loops ("If any check fails, fix the issue and re-check before proceeding"). This matches the anchor for clear sequence with explicit validation, error-recovery loops, and a checklist.

Progressive Disclosure

The file has clear section headers (Workflow, Template Selection, Extension Shape, Local Test Flow, Before Handoff) but is a single ~340-line monolith with no `references/`, `scripts/`, or `assets/` bundle and no external file pointers. The Extension Shape section is effectively a 90-line manifest-field API reference that belongs in a one-level-deep reference file. This fits 'Some structure but could be better organized; content that should be separate is inline' better than the 4-anchor, which requires most content to be appropriately placed in separate files.

Specificity

The description lists five concrete, verifiable actions — "Create, scaffold, customize, validate, and locally test Qwen Code extensions" — with comprehensive coverage of the skill's surface. This matches the anchor 'Lists multiple specific concrete actions; comprehensive coverage' and exceeds the 4-anchor, which tolerates coverage gaps.

Completeness

It explicitly answers both questions: what ("Create, scaffold, customize, validate, and locally test Qwen Code extensions") and when ("Use when the user wants a new Qwen Code extension, needs help choosing an extension template, ... or asks how to link and test an extension locally") with concrete trigger phrases. This is the pattern of the anchor-5 example, not the 4-anchor where the 'when' is only loosely specified.

Trigger Term Quality

It covers the natural phrases a user would say: "new Qwen Code extension", "choosing an extension template", "link and test an extension locally", plus the full capability vocabulary ("QWEN.md context, commands, skills, agents, MCP servers, settings, hooks, channels, or LSP servers"). Coverage is comprehensive with synonym-level variation, matching the top anchor rather than the 4-anchor's 'a few natural terms missing'.

Distinctiveness Conflict Risk

The niche is tightly scoped to Qwen Code extensions and their linking/testing lifecycle, so it is unlikely to fire for general skill- or command-authoring requests outside the extension mechanism. It sits at the 'clear niche with distinct triggers; minimal conflict risk' anchor; the generic capability words (commands, skills, agents) are all anchored by the 'Qwen Code extension' qualifier.