Conciseness

The body is dense and mostly earns its tokens with skill-specific guidance (file-structure principles, granularity rules, templates) rather than generic knowledge; only minor framing in 概述 could be trimmed.

Actionability

Provides copy-paste-ready templates: a plan-document header, a full task structure with exact file paths, failing-test code, pytest commands with expected output, and git commit commands, plus concrete forbidden-placeholder patterns.

Workflow Clarity

A clear sequenced process runs from 范围检查 through 文件结构, 任务粒度, templates, to an explicit 自检 checklist (spec coverage, placeholder scan, type consistency) with a fix-and-continue feedback loop.

Progressive Disclosure

Well-organized into clearly labeled sections with no nested references and no bundle files; the long inline templates (task structure, forbidden placeholders) could arguably live in separate reference files but are appropriately placed for a single-purpose skill.

Specificity

The description names the domain ("规格说明或需求用于多步骤任务") but states no concrete actions — it never says what the skill does (e.g. write/decompose a plan), only when to invoke it.

Completeness

Only the "when" is present and explicit; the "what" (the skill produces an implementation plan) is entirely missing, matching the anchor where only "when" is present without "what".

Trigger Term Quality

Natural trigger phrases like "规格说明或需求" (specs/requirements), "多步骤任务" (multi-step tasks), and "动手写代码之前" (before writing code) are present, but coverage lacks common synonyms or variations.

Distinctiveness Conflict Risk

The planning trigger is somewhat specific but could overlap with sibling skills like brainstorming or executing-plans, which share the same spec/task vocabulary.