Conciseness

The body is lean and dense with concrete file paths and commands, with no padding explaining concepts Claude already knows (e.g., no 'what is an agent' exposition). Every line earns its place, matching the score-3 lean/efficient anchor rather than the score-2 anchor that retains unnecessary explanation.

Actionability

Provides fully executable, copy-paste-ready guidance: exact file paths (registry.ts, manifests, test files) and concrete commands ('npm test', 'npm run build && node dist/index.js --agent {agent-id} --dry-run', '--overwrite=force', '--lang ja'). As an instruction-only SOP skill, the absence of code samples is not penalized because the guidance is concrete and specific, matching the score-3 anchor.

Workflow Clarity

A clearly sequenced 5-phase workflow with explicit checkpoints: a plan-first approval gate before implementation, a dedicated Phase 5 verification block with specific commands, and an error-reporting feedback instruction ('If tests cannot run, explicitly report which step is blocked and why'). Verification is present for the batch/template-generating operations, so the destructive/batch cap does not apply; matches the score-3 anchor.

Progressive Disclosure

SKILL.md is an overview that defers detail to clearly signaled, one-level-deep references — the References section points to real bundle files (references/skills-migration.md, references/plan-output-checklist.md) plus repo-internal SOP/templates, all of which exist. Matches the score-3 anchor of a clear overview with well-signaled one-level references rather than the score-2 inline-bloat anchor.

Specificity

Lists multiple concrete actions: 'Add or extend coding-agent support', 'executing the SOP ... end-to-end', 'introducing a new agent', 'adding a subagent-capable variant', and 'evaluating migration ... to skills-based templates'. This matches the score-3 anchor of multiple specific concrete actions rather than the score-2 single-domain anchor.

Completeness

Explicitly answers both what ('Add or extend coding-agent support in cc-sdd by executing the SOP ... end-to-end') and when via an explicit 'Use when ...' clause listing three triggering situations. This matches the score-3 anchor of clearly answering both what and when with explicit triggers.

Trigger Term Quality

Natural trigger phrasing a user would actually say is present: 'introducing a new agent', 'adding a subagent-capable variant', 'evaluating migration ... to skills-based templates'. These cover the common ways a maintainer would request this work, fitting the score-3 anchor of good natural-term coverage; not score 2 because common variations are not missing.

Distinctiveness Conflict Risk

The niche is tightly scoped to cc-sdd agent integration with distinct triggers (new agent, subagent variant, skills migration), making it unlikely to fire for unrelated skills. Matches the score-3 anchor of a clear niche with distinct triggers rather than the score-2 overlap anchor.