Conciseness

The body is operational throughout — command syntax, an options table, copy-paste examples, output JSON schema, and env config — with no explanations of concepts Claude already knows. It stops short of anchor 5 because the deep-vs-web engine tradeoff is stated twice ("引擎说明" and "注意事项") and the disclaimer tail adds little operational value.

Actionability

All commands are fully executable ("bash \"$SKILLS_ROOT/music-search/scripts/music-search.sh\" search \"周杰伦 范特西\" --pan quark --format flac") with five varied examples plus a PowerShell variant, and the documented output JSON and field semantics let the agent parse results directly. Verified against the bundle: the search/hot/resolve subcommands and --pan/--format/--limit/--engine flags all exist in scripts/music-search.js, matching the documented interface exactly.

Workflow Clarity

The "Agent 使用流程" section gives a clear 5-step sequence with a conditional fallback ("如果结果中有 pageUrl 但没有直接 url，用 resolve 命令获取真实地址") and a worked example dialogue. It is not 5 because there are no checkpoints for failure cases — empty results, failed requests, or dead links are only hinted at in the notes rather than handled as feedback loops in the workflow.

Progressive Disclosure

Well-organized sections (prerequisites, commands, agent flow, output format, config, notes) with script references that point to real bundle files (scripts/music-search.sh, .ps1, and the underlying .js/deep-extract.js, all verified present). It is below anchor 5 because everything is inlined in SKILL.md — the JSON output schema, field dictionary, and .env config reference could live in a separate reference file — and the referenced music-search/.env file does not exist in the bundle.

Specificity

"Search cloud drives for downloadable music resources (songs, albums, lossless audio)" names the domain and one concrete action with specific resource types, but only lists a single action (search) rather than several (e.g. no mention of filtering by format, resolving links, or hot recommendations). It is above score 2 because the action is concrete with a defined scope, and below score 4 because anchor 4 requires several specific actions.

Completeness

It explicitly answers what ("Search cloud drives for downloadable music resources") and when ("Use this skill when the user wants to download a specific song or album"), and adds negative triggers ("Do NOT use for general music information, lyrics, or recommendations") matching the anchor-5 example's structure. Score 4 is ruled out because the 'when' clause is concrete, not merely present.

Trigger Term Quality

Natural phrases users would say are present: "download a specific song or album", "music", "lossless audio", "cloud drives". It falls short of anchor 5 because common synonyms and format extensions users actually say (flac, mp3, Hi-Res, track) are absent, but coverage is clearly better than the 'some relevant keywords' of anchor 3.

Distinctiveness Conflict Risk

The niche is clear (downloadable music resources on cloud drives) and the explicit exclusion clause ("Do NOT use for general music information, lyrics, or recommendations") sharply separates it from music-info/lyrics/recommendation skills, minimizing conflict risk. It clearly fits anchor 5's 'clear niche with distinct triggers'.