Conciseness

The body is largely lean with a concrete template and terse guidelines, but the generic "When to Use" line ("applicable to execute the workflow or actions described in the overview") is low-value filler. Not a 5 because that boilerplate could be trimmed; not a 3 because the rest assumes Claude's competence without over-explaining.

Actionability

Provides a copy-paste Plan Template plus concrete verb-first guidance ("Add...", "Refactor...", "Verify...") and an atomic-step rule. Not a 5 because the template's action items are generic placeholders ("<Step 1: Discovery>") rather than worked examples.

Workflow Clarity

Three clearly sequenced steps (Scan Context, Minimal Interaction, Generate Plan) with validation embedded in the output structure ("Validation: At least one item for testing"). Not a 5 because there are no explicit feedback/checkpoint loops, though the non-destructive single-purpose task limits the need for them.

Progressive Disclosure

A self-contained simple skill with well-organized sections (Goal, Workflow, Plan Template, Checklist Guidelines, Limitations) and no need for external references, matching the simple-skill exception. Not below 5 because structure is clear and no nesting or buried references exist.

Specificity

Names the domain ("plan for a coding task") and one concrete action ("generate a clear, actionable, and atomic checklist"), but does not enumerate multiple specific actions, matching the 3-anchor example "Processes PDF files and extracts content". Not a 4 because only a single action is stated rather than several specific ones.

Completeness

Explicitly answers both what ("generate a clear, actionable, and atomic checklist") and when ("Use when a user asks for a plan for a coding task") with a concrete trigger phrase, matching the 5-anchor. Not below 5 because neither element is missing or vague.

Trigger Term Quality

The phrase "a plan for a coding task" is a natural utterance a user would say, giving good keyword coverage. Not a 5 because common synonyms ("break down this task", "todo list", "action items") are absent.

Distinctiveness Conflict Risk

The "plan for a coding task ... atomic checklist" niche is mostly distinct with only minor overlap risk against generic planning skills. Not a 5 because "planning" is a broad category that could collide with related skills.