Conciseness

The body is largely efficient — tables instead of prose, exact commands, no explanations of concepts Claude already knows — but the "Trigger phrases" section ("create an implementation plan", "plan this out in phases", etc.) substantially duplicates the description and the overlapping "When to use each mode" and "Recognition examples" tables, and the "Mindset" section ("a navigable contract between an agent and a codebase") is philosophical padding. Not score 3 because these are trimmable redundancies in an otherwise tight document, not pervasive over-explanation.

Actionability

Guidance is fully executable throughout: exact scaffold commands ("sh scripts/new-plan.sh <plan-slug>"), the concrete output directory tree, the identifier format with a worked example ("P02T03 = phase 2, task 3"), slug conversion examples, and a copy-paste-ready guardrail message template. Not score 4 because commands and examples cover the common cases for both modes completely, including validation with documented exit codes ("Exit 0 = valid, 1 = invalid").

Workflow Clarity

Both modes have clearly sequenced steps with explicit validation checkpoints and feedback loops: Mode 1 Step 5 mandates "MUST run before reporting to the user — no exceptions" with a fix-and-re-run loop ("If any file fails: fix the violation and re-run validate-plan.sh. Repeat until exit 0"), and Mode 2 ends with a validation checklist plus a safety ordering rule ("never delete source before the new structure is confirmed valid"). Not score 4 because checkpoints, error-recovery loops, and checklists are all present, matching the score-5 anchor.

Progressive Disclosure

The body is a well-signaled overview with one-level-deep references that all resolve to real files: anti-patterns.md, worked-examples.md, mode2-advanced.md, example-transformation.md, seven templates/*.yaml, and the schemas — each listed in a table with a "When to Use" column, plus explicit resource-loading rules ("Load scripts and templates only when needed"). Not score 4 because the split is appropriate and navigation is easy: detail genuinely lives in the references while SKILL.md carries only the operating procedure.

Specificity

The description enumerates multiple concrete actions with comprehensive coverage: "Converts a PRD or requirements document into a structured, phased implementation plan", "restructures existing monolithic planning documents", "Creates a root plan index... a numbered phase file per phase, and a numbered task file per task", and names the exact output location (.context/plans/). Not score 4 because coverage of the skill's two modes and their outputs is complete, not just 'several actions with minor gaps'.

Completeness

Both questions are answered explicitly and concretely: the 'what' is three sentences of specific capability and output structure, and the 'when' is an explicit "Use when the user asks to..." clause listing concrete trigger phrases. Not score 4 because the 'when' is not merely present but enumerates ten specific triggers, matching the score-5 anchor example.

Trigger Term Quality

The 'Use when' clause covers natural phrasings and their synonyms comprehensively: "create an implementation plan, break down a PRD, convert requirements to tasks, structure project phases, generate a roadmap, plan a project in sprints, organise task breakdown, split a monolithic planning doc, or decompose a spec into phases and tasks" — these are phrases a user would naturally say. Not score 4 because both creating and restructuring trigger vocabularies are covered with variations, leaving no obvious common terms missing.

Distinctiveness Conflict Risk

The niche is clear — PRD-to-phased-plan decomposition with a defined file layout and plan restructuring — and most triggers ("break down a PRD", "decompose a spec") are unambiguous. Not score 5 because broad triggers like "generate a roadmap" and "plan a project in sprints" create minor overlap risk with general project-management or roadmap skills, matching the 'mostly distinct; minor overlap risk' anchor rather than 'minimal conflict risk'.