Conciseness

The body is dense and assumes competence — no padding and no explanation of concepts Claude already knows; every section carries rules. It falls just short of anchor 5 because of minor redundancy: the WBS contract ("Define WHAT, WHEN, WHO, WHERE per step") repeats the enforce section's meta-sequence, and the pitfalls/best-practices lists restate validation_checklist items, so a small amount could be trimmed or merged.

Actionability

For an instruction-only skill the guidance is largely concrete: a numbered 7-step core flow, an explicit per-step field contract ("title, description, agent, AC, NFR, EARS FR, priority, predecessors"), a request-size scaling table, and named template paths to acquire. It stops short of anchor 5 because there is no worked example of an EARS requirement or a filled-in WBS step, which is the common case for a skill whose entire output is those artifacts.

Workflow Clarity

The core flow is a clearly numbered sequence with explicit checkpoints: "Close gaps and consistency issues", "Stop and escalate when critical unknowns block safe planning", HITL approval gates, and a 13-item validation_checklist. It misses anchor 5 because the checklist is a final gate rather than an embedded validate-then-retry feedback loop — the flow doesn't state what to do when a checklist item fails (e.g., revisit which step and re-verify).

Progressive Disclosure

Structure is good: the main body holds rules and the LARGE-only templates are externalized to three real asset files (verified to exist in ./assets/), referenced one level deep via a dedicated templates section. Minor gaps keep it below 5: the referenced paths ('planning/assets/pl-wbs.md') don't match the actual bundle layout (assets/pl-wbs.md), templates are listed without a word on what each contains, and assets/pl-validation-rubric.md is present but never referenced from the body.

Specificity

The description names its domain and one concrete action — "To build execution-ready plans from approved intent/specs" — plus named artifacts ("EARS", "sequenced WBS", "HITL checkpoints"), but these are artifact nouns rather than a list of several specific actions. It matches anchor 3 (domain plus 1-2 concrete actions, not comprehensive) better than anchor 4, which expects several distinct specific actions listed.

Completeness

The "what" is clear — building execution-ready plans from approved intent/specs — but there is no "Use when..." clause or equivalent trigger guidance anywhere in the description, which caps completeness at 3 per the judging guidelines. This matches anchor 3 (clear 'what', 'when' missing) and rules out anchor 4, which requires both present.

Trigger Term Quality

Relevant keywords like "execution-ready plans", "tech spec", and "WBS" exist, but the heavy reliance on specialized jargon ("EARS", "HITL") crowds out natural phrases a user would actually say ("break this down into tasks", "create a project plan", "sequence the work"). This fits anchor 3 — some relevant keywords but missing common variations and synonyms — rather than anchor 4's broader natural-term coverage.

Distinctiveness Conflict Risk

The EARS/WBS/HITL framing carves out a fairly distinct planning niche with minimal conflict risk against unrelated skills, matching anchor 4 (mostly distinct, minor overlap risk). It is not a 5 because "planning" broadly overlaps with closely related architecture/decomposition skills and no trigger phrasing further separates them.