Conciseness

The body does not explain concepts Claude already knows — there is no padding or tutorial prose — but at ~215 lines of maximally compressed jargon it could be tightened considerably: the long exact-prompt-matching paragraphs for professional confidence review mode (lines 21-40), the 25+ field names listed in Outputs, and the exhaustive heading/value inventories in Output Format all restate contract detail inline. This is 'mostly efficient but could be tightened' rather than noticeably padded (2) or lean with every token earning its place (4-5).

Actionability

Concrete executable commands are present (e.g. 'python3 Plugins/harness-engineering/scripts/check_bluf_structure.py <plan-path> --json' and the traceability lints), and the 12-step procedure is directive, but most steps defer their actual content to references that are not in this bundle ('Classify mode and depth using references/', 'Use the execution-first plan template in .../plan-artifact-contract.md'), and key constructs like 'Type 1 / Type 2 decisions' are used without definition or example. There is no sample plan artifact or worked example, matching 'some concrete guidance but incomplete; missing key details'.

Workflow Clarity

The Procedure is a clearly numbered 12-step sequence, the Validation section runs concrete scripts with explicit fail-fast 'pass/fail/blocked' recording and blocked-handoff conditions, and the Failure Mode section defines blocked_reason classes with one recovery step — real feedback loops and checkpoints. It falls short of 5 because several steps are so jargon-dense their execution is ambiguous (e.g. 'resolve stage context', 'apply the strict boundary contract') and the mechanics of steps 2 and 4 are entirely deferred to unavailable references — 'clear sequence with most checkpoints present; minor validation gaps'.

Progressive Disclosure

A final References section with a 'Load only triggered references' policy provides reasonable signaling, but large blocks that belong in separate files are inlined in SKILL.md (the exact-prompt trigger matching, the full output-heading inventory, the lint details), and the actual bundle does not contain the referenced contracts: paths like '../../references/skills/he-plan/plan-artifact-contract.md' and 'post-plan-handoff.md' do not resolve in this bundle, whose references/ holds only eval fixtures (contract.yaml, evals.yaml, task-profile.json). This matches 'some structure; references present but not clearly signaled; content that should be separate is inline'.

Specificity

The description states a concrete deliverable — 'Create bounded Harness Engineering execution plans from approved specs or issue slices' — and enumerates concrete plan components ('ordered implementation units, explicit scope boundaries, rollback posture, traceability, and validation gates'). It is not 5 because it describes essentially one composite action (plan creation) rather than multiple distinct actions like extract/fill/merge, and not 3 because the deliverable's components are explicitly and comprehensively named.

Completeness

Both what ('Create bounded Harness Engineering execution plans from approved specs or issue slices') and when ('Use when work needs ordered implementation units, explicit scope boundaries, rollback posture, traceability, and validation gates before code changes') are explicitly present. Not 5 because the when-clause describes abstract work characteristics rather than concrete user trigger phrases or utterances, leaving it one notch below the fully user-anchored anchor; clearly above anchor 3 since the when is explicit, not merely implied.

Trigger Term Quality

Relevant keywords exist ('execution plans', 'specs', 'issue slices', 'rollback', 'scope', 'validation', 'code changes'), but the phrasing leans on internal system jargon ('Harness Engineering', 'ordered implementation units', 'rollback posture', 'validation gates') that a user would not naturally say. Common natural variations ('implementation plan', 'break down the spec', 'sequence tasks', 'delivery plan', 'milestones') are missing, matching the anchor for some relevant keywords but missing common variations or synonyms.

Distinctiveness Conflict Risk

It carves a clear niche (pre-implementation planning from approved sources) with distinctive vocabulary ('Harness Engineering execution plans', 'issue slices', 'rollback posture'). Minor overlap risk remains with closely related sibling skills in the same family (he-spec, he-strategy, he-linear-plan are referenced in the body), since a generic 'plan this' request could plausibly route to a sibling — matching 'mostly distinct; minor overlap risk with closely related skills' rather than the minimal-conflict anchor.