Conciseness

The body is lean and imperative with no concept explanations or padding, but minor tokens could be trimmed — "You are the guardrail" and "Load every rule into your working memory" state things Claude would do anyway. This fits 'Efficient; minor instances of over-explanation that could be trimmed' rather than the every-token-earns-its-place level 5.

Actionability

Guidance is mostly executable: exact filenames (loop-constraints.md, docs/safety.md), a copy-paste output line, a specific flag check (loop-pause-all), and a concrete denylist (.env, auth/, payments/, secrets/, credentials/). It stops short of fully executable because it never says how to check loop-pause-all activity or how to count rules from the external file's unknown format — minor gaps per the 'Mostly executable guidance' anchor.

Workflow Clarity

The skill has a clear numbered startup sequence (read → load → check pause flag → apply), explicit validation checkpoints before every risky action ("Before pushing: re-read the Push & Merge section. If ANY rule blocks it, stop and tell the human"), feedback loops (escalate after 3 failed fix attempts, human approval before merge), and a defined fallback path when the file is absent. This matches 'Clear sequence with explicit validation steps; feedback loops for error recovery; checklists for complex processes'.

Progressive Disclosure

The skill is under 50 lines with no bundle files (no references/, scripts/, or assets/ exist) and no need for external references beyond the runtime file loop-constraints.md it is designed to read. Per the simple-skill guideline, well-organized sections alone qualify it for the top anchor: clear overview with appropriately split, navigable sections.

Specificity

"Read loop-constraints.md at the start of every run and enforce every rule" names the domain and 1-2 concrete actions (read a specific file, enforce its rules), matching the anchor 'Names domain and 1-2 concrete actions, but not comprehensive'. It is not a 4 because it never enumerates the several specific actions the skill actually performs (push gating, path denylists, test enforcement, escalation).

Completeness

The 'what' is stated ("Read loop-constraints.md ... and enforce every rule") and the 'when' has equivalent explicit trigger guidance ("at the start of every run"; "This skill runs BEFORE triage or any action skill"), so the missing-'Use when' cap at 3 does not apply. It is not a 5 because the 'when' describes run sequencing rather than concrete user trigger phrases, and the 'what' delegates substance to an external file — 'when' could be more explicit and specific.

Trigger Term Quality

Relevant keywords exist ("loop-constraints.md", "triage", "action skill", "constraints", "rules") but common variations a user would naturally say are missing ("guardrails", "safety rules", "limits", "restrictions"), fitting 'Some relevant keywords but missing common variations or synonyms'. Not a 4 because keyword coverage is narrow and largely internal jargon rather than natural user phrasing.

Distinctiveness Conflict Risk

Distinct triggers (specific filename loop-constraints.md, explicit precedence "BEFORE triage or any action skill", references to sibling skills loop-triage/loop-budget) give it a mostly distinct niche with only minor overlap risk against closely related loop-family skills. It is not a 5 because phrases like "enforce every rule" and "Constraints are binding" are broad and could bleed into other safety/guardrail skills.