Conciseness

The body is mostly efficient instructional content, but the ~90-line inline report template and the 'Handling Failures' section — which restates validation logic already covered in the phases — add length that could be trimmed or externalized.

Actionability

Highly actionable throughout: concrete bash commands, copy-paste-ready code blocks, decision tables (package manager, branch state), and explicit per-language command patterns.

Workflow Clarity

A clear Phase 0–6 sequence with a PHASE_X_CHECKPOINT checklist after each phase, immediate 'validate after every change' loops, and explicit error-recovery steps for each failure mode.

Progressive Disclosure

No bundle files exist and all content is inline in one ~560-line SKILL.md; the large report template and failure handling are content that should be split into one-level-deep reference files but are not.

Specificity

Names the core action ('Execute an implementation plan with rigorous validation loops') and a couple of variants ('implement or execute a plan file, build a planned feature'), but it is not a comprehensive list of multiple concrete actions.

Completeness

Explicitly states what it does ('Execute an implementation plan with rigorous validation loops') and when to use it via an explicit 'Use when...' trigger clause, satisfying both requirements.

Trigger Term Quality

The 'Use when' clause covers natural phrasings a user would actually say — 'implement or execute a plan file', 'build a planned feature' — giving good coverage of common variations.

Distinctiveness Conflict Risk

The plan-file framing ('implement or execute a plan file', 'build a planned feature') carves a clear niche tied to plan execution that is unlikely to trigger for unrelated skills.