Conciseness

The body is two lines: a generator comment ("Generated by scripts/agent-harnesses.py; do not edit directly.") that serves a real maintenance function, and one instruction. Every token earns its place and the skill fully assumes Claude's competence.

Actionability

"Load and follow the shared skill at `~/.agents/skills/executing-plans/SKILL.md`" is a concrete, unambiguous, executable directive. It falls short of 5 because all substantive guidance is delegated to an external absolute path that does not exist in this bundle or environment, leaving no fallback content.

Workflow Clarity

The single action is unambiguous, satisfying the simple-skill exception, but the workflow the description advertises ("review checkpoints") is entirely outsourced to the external file — no checkpoints or error handling (e.g., what to do if the target is missing) appear here. Not 3, since nothing about the one step is vague or implicit.

Progressive Disclosure

The single reference is clearly signaled and one level deep, but it points outside the skill bundle to an absolute home-directory path (`~/.agents/...`) that does not resolve in this environment, with no references/ directory or local fallback. Structure cannot be verified and navigation depends on machine state, which is more than 'minor organization gaps' (anchor 4).

Specificity

The description names the domain ("execute in a separate session with review checkpoints") but lists no concrete actions the skill performs — there is no 'what' at all. It is above the purely abstract anchor (1) because the domain is identifiable, but below anchor 3, which requires 1-2 concrete actions.

Completeness

Only the 'when' is present ("Use when you have a written implementation plan...") with no 'what' — the skill's actual behavior is never stated. This exactly matches anchor 2 ("only 'when' is present without 'what'"), and cannot be 3 because even a weak 'what' is absent.

Trigger Term Quality

Phrases like "written implementation plan", "execute", and "separate session" are relevant, but common natural variations are missing (e.g., "follow the plan", "carry out", "work through the plan", "plan.md"). Not 4, since anchor 4 requires good keyword coverage with only a few natural terms missing.

Distinctiveness Conflict Risk

The trigger conditions (written plan, separate session, review checkpoints) are somewhat specific, but the description could still overlap with plan-creation or general task-execution skills. Without a 'what' clause, it is harder to distinguish from closely related skills, so it does not reach anchor 4.