Lists multiple specific concrete actions: creates/updates structured plans, breaks change requests into scoped atomic tasks, specifies clear goals, boundaries, acceptance criteria, and verification steps. Also specifies the output path format `context/plans/{plan_name}.md`.

Clearly answers both 'what' (creates/updates SCE implementation plans with atomic tasks, goals, boundaries, acceptance criteria, verification steps) and 'when' (explicit 'Use when' clause covering feature planning, refactoring, integration, task breakdowns, roadmaps, and change requests requiring structured planning).

Includes a strong set of natural trigger terms users would say: 'plan a new feature', 'refactor', 'integration', 'project plan', 'task breakdown', 'implementation roadmap', 'work plan', 'success criteria', 'structured planning'. These cover many natural variations of how users would request planning help.

Highly distinctive with the SCE-specific naming, the specific output path `context/plans/{plan_name}.md`, and the focus on structured implementation planning with atomic tasks. The combination of structured planning artifacts with specific file conventions makes it clearly distinguishable from generic coding or documentation skills.

The skill is mostly efficient and avoids explaining concepts Claude already knows. However, some sections are slightly verbose—the clarification gate's bullet list of critical details is thorough but could be tightened, and the example clarification questions, while useful, add length. The example task entries are valuable but the skeleton + filled-in example is somewhat redundant.

The skill provides highly concrete, actionable guidance: specific plan format, required task fields, a filled-in example task with real commands (`pnpm test`, `curl`), checkbox syntax for progress tracking, exact output path (`context/plans/{plan_name}.md`), and a canonical next command. Claude knows exactly what to produce.

The workflow is clearly sequenced: intake trigger → clarification gate (blocking) → plan writing → output contract. The clarification gate is an explicit validation checkpoint that blocks progress until ambiguity is resolved. The required final validation task and the output contract with confirmation steps provide strong feedback loops. The atomic task slicing contract adds a clear quality gate for task decomposition.

The skill references `context/plans/PLAN_EXAMPLE.md` for a full annotated reference plan, which is good progressive disclosure. However, no bundle files were provided, so this reference is unverifiable. The main content is well-structured with clear sections but includes inline examples that could potentially be offloaded. For a skill of this complexity, the organization is reasonable but the missing bundle file weakens the score.