Conciseness

The body is dense and nearly every section delivers instruction, but it could be tightened: the Non-goals section restates rules already given in Steps 0, 4, and 7 ('Don't decide on the user's behalf', 'Don't rewrite an accepted record', 'Don't fold implementation detail'), the maxim 'records a decision; does not make one' appears in Step 0, Step 6, and Non-goals, and the marketing/press-release metaphors are used twice. This fits anchor 4 ('efficient; minor instances of over-explanation that could be trimmed') better than anchor 3, because the padding is repetition for emphasis rather than explanation of concepts Claude lacks.

Actionability

Fully concrete and executable: exact tool invocations are given verbatim ('exec("ls -A decisions/")', 'exec("grep -rln <subsystem-keyword> decisions/")', 'write({ document: { path: "decisions/0012-...", template: "decision" } })', 'edit({ document: { path: ..., frontmatter: { status: "superseded" } } })', 'links({ kind: "backlinks", ... })', 'audit({ path: ... })'), plus a copy-ready YAML frontmatter block, filename format ('NNNN-title.md, zero-padded 4-digit'), and status vocabulary. Per the code_vs_instruction scoring note, this instruction-only skill has fully actionable, specific guidance covering the common cases.

Workflow Clarity

Steps 0–9 are clearly sequenced with a HARD GATE at entry, an adversarial self-check pass in Step 6 ('fix what fails'), explicit audit validation in Step 8 ('returns clean... fix every finding'), and a both-directions wiring check for the supersedes chain ('Both edits land, or the chain is broken'). This matches the anchor-5 pattern of clear sequence + explicit validation + feedback loops + checkpoints; the destructive-adjacent edits (status flips on frozen records) are covered by the audit step, so the workflow cap does not apply.

Progressive Disclosure

No bundle files exist (references/, scripts/, assets/ are absent), and the body is well-organized into clearly signaled Steps 0–9 plus Non-goals — good structure. It falls short of anchor 5 ('content appropriately split', well-signaled one-level references) because at ~180 lines some material — the full frontmatter template spec, the supersedes-wiring examples, and the per-section ADR craft guidance in Steps 3–5 — could plausibly live in a reference file to slim the always-loaded SKILL.md. It is above anchor 3 since what is inlined is cohesive process guidance, not bulk reference material dumped inline.

Specificity

The description lists multiple concrete actions — 'Records an architecture decision as a Nygard/MADR-shaped ADR under decisions/', 'capturing the context', 'the options weighed', 'the decision itself', 'its consequences in both directions, plus the supersedes chain' — comprehensively covering the ADR-recording domain. It exceeds the anchor-4 level ('several specific actions; minor gaps') because nothing in the domain's core actions is missing, and it is far more concrete than anchor 4's example.

Completeness

It explicitly answers both questions: 'what' in the first sentence (records a MADR-shaped ADR capturing context, options, decision, consequences, supersedes chain) and 'when' via 'Read when asked to...' with concrete trigger phrases, plus explicit negative triggers. This matches the anchor-5 example pattern (action list + 'Use when...' clause) exactly.

Trigger Term Quality

'Read when asked to record an architecture decision, write an ADR, log the decision we made, document why we chose X over Y, capture this decision for the record, or supersede an old decision with a new one' comprehensively covers natural user phrasings, including synonyms (record/write/log/document/capture) and the key domain term 'ADR'. Not anchor 4 ('a few natural terms missing') — the common variations users would say are all present.

Distinctiveness Conflict Risk

'Do NOT read to frame a proposal... (frame-a-proposal), to write a spec or implementation plan (write-a-spec), to write an incident postmortem (write-a-postmortem), or to judge whether a design is sound (review-a-design)' explicitly disambiguates every neighboring skill, and 'This skill records a decision already made; it does not make one' draws the boundary crisply — minimal conflict risk.