Conciseness

Every line earns its place: variable setup ('Resolve ENGINE using /hep-build Step 0 and set PACKAGE_ROOT'), three exact bash commands, a concrete file checklist, and a one-line completion guard. There is no concept explanation or padding, matching the lean-and-efficient anchor exactly.

Actionability

The bash block is copy-paste ready with concrete variables, and the file list is explicit ('root AGENTS.md, CLAUDE.md, GEMINI.md; .agents/; .claude/; scripts/install.sh'). It stops short of 5 because the 'inspect the generated package's selected adapters and install files' step gives no command or concrete criterion beyond file existence.

Workflow Clarity

The sequence is clear — resolve ENGINE, run the three verification scripts, inspect required files, and a final guard ('Do not claim completion if any required file is missing'), with the scripts themselves serving as validation checkpoints. It is not 5 because there is no feedback loop instructing what to do when a verification script fails.

Progressive Disclosure

The skill is under 50 lines, single-purpose, with no bundle files and no content that warrants splitting into references. The body is well organized into a command block, a checklist, and a completion guard, satisfying the simple-skill exception for a top score.

Specificity

The description lists three concrete capabilities — 'can be installed, discovered by runtimes, and checked without private dependencies' — which matches the anchor for several specific actions with minor gaps. It is not a 5 because 'checked' is underspecified compared to the other two actions, leaving a small coverage gap.

Completeness

Both 'what' (verifying installability, runtime discovery, and private-dependency safety) and 'when' (explicit 'Use when...' clause) are present. It does not reach 5 because the 'when' essentially restates the 'what' instead of naming a distinct triggering moment (e.g., 'after generating an agent package'), so the trigger could be more explicit.

Trigger Term Quality

Relevant keywords are present ('verifying', 'generated agent package', 'installed'), but 'discovered by runtimes' leans technical rather than user-natural, and common variations or synonyms such as 'verify install', 'install check', or 'package verification' are absent — the anchor for some relevant keywords missing common variations. It falls short of 4 because keyword coverage is not yet 'good' with only a few missing natural terms.

Distinctiveness Conflict Risk

'Generated agent package' carves a mostly distinct niche with clear triggers, matching the anchor for mostly distinct with minor overlap risk. It is not a 5 because generic terms like 'installed' and 'checked' leave minor overlap risk with general packaging or verification skills.