Conciseness

The body is mostly dense, useful reference material with no explanation of concepts Claude already knows, but the Complete Action Contract states all 26 actions twice — once in the summary table ("| `tasks.delete` | 删除任务... arguments: `task_id`, `task_ids`, `delete_files` |") and again in per-action sections — which is significant duplication that could be tightened. This sits between the score-4 anchor (only minor trimmable over-explanation) and score 2 (noticeably padded), matching "mostly efficient but could be tightened".

Actionability

Commands are fully executable and copy-paste ready ("python skills/downloader-operation/scripts/mp-downloader.py call --client \"main-qb\" --action tasks.list --arguments '{\"status\":\"downloading\",\"limit\":20}'"), and every action's arguments are specified with types, defaults, enums, and required markers. Specific examples cover the common cases, matching the top anchor.

Workflow Clarity

The workflow is clearly sequenced (resolve client → compose complete arguments → single call → verify), with an explicit Verification section ("After a write, query the smallest relevant state: `tasks.list` for status and properties, `tasks.files` for file priority") and an explicit error-recovery feedback loop ("reports all detectable argument errors in one response... correct every reported field together instead of retrying one field at a time"). Destructive and batch operations are present and verification guidance covers them, so no cap applies.

Progressive Disclosure

The single bundle file `scripts/mp-downloader.py` is real and correctly referenced, and section headers organize the body well, but roughly 190 lines of the 340-line body are an inline per-action API reference (the score-3 anchor's "200 lines of API reference that could be in a separate file"). No reference files exist to split detail into, and the summary table duplicates the detailed sections, leaving structure present but not well split.

Specificity

"inspect, diagnose, or directly control a configured qBittorrent, Transmission, or rTorrent instance" plus a list of concrete capability areas ("task files and selection, trackers, peers, queue order, limits, tags, locations, rechecks, direct provider submissions, or batch task control") gives comprehensive, concrete action coverage. It exceeds the score-4 anchor, which anticipates minor gaps in coverage.

Completeness

An explicit "Use this skill when the user asks to inspect, diagnose, or directly control..." clause answers "when" with concrete triggers, and the enumerated operation list ("suitable for task files and selection, trackers, peers... batch task control") answers "what" concretely. Both are explicit and concrete, matching the score-5 anchor rather than score 4 where "when" is less specific.

Trigger Term Quality

Natural client names (qBittorrent, Transmission, rTorrent) and operation words (inspect, diagnose, recheck, tags, peers) are strong triggers, but common user phrasings like "torrents", "pause/resume", "seeding", "download speed", or "magnet" are absent. Good coverage with a few natural terms missing matches the score-4 anchor; it is below score 5, which expects synonym/extension-level comprehensiveness.

Distinctiveness Conflict Risk

Naming three specific torrent clients and scoping to downloader-native operation creates a clear niche with distinct triggers, minimal conflict risk. Only slight ambiguity with generic acquisition/download requests keeps it at the top anchor rather than raising overlap concerns.