Conciseness

Mostly efficient with concrete commands, but the consent/authorization rules are restated across 'Contract', 'Enablement before capture', 'Per-User Storage Policy', 'When it fails', and 'Anti-Patterns', and slogan lines ('Ideas are the intellectual capital. Entities are bookkeeping.', 'An unlinked mention is a broken brain.') pad the token budget. Matches 'mostly efficient but includes some unnecessary explanation or could be tightened' — the padding is repetition rather than explanation of known concepts, so above 2 but below 4.

Actionability

Concrete executable guidance throughout: 'gbrain search "name"', 'gbrain timeline-add <slug> <date> "<summary>"', exact back-link format '- **YYYY-MM-DD** | Referenced in [page title](path) — brief context', page paths like 'originals/{slug}', and signal-log line formats. Minor gaps keep it from 5: notability criteria are undefined ('If notable, save...') and the structure of pages to write is unspecified.

Workflow Clarity

Phases are clearly sequenced (idea detection → entity handling with search/thin/rich branches → signal logging) with skip conditions, explicit failure handling ('write_pending ... exit 10 ... poll the receipt or re-read and merge on the next turn'), and a readback verification checkpoint ('verify captured content with an actual readback'). Not 5: validation is mentioned but not woven into an explicit fix-and-retry loop; not 3: checkpoints and error recovery are explicit.

Progressive Disclosure

Well-sectioned single file, but both referenced paths ('skills/conventions/quality.md', '../conventions/agent-operator-protocol.md') are dangling — neither exists in this bundle — and the Iron Law back-link procedure and the long 'memory.auto_writeback'/Stop-hook paragraph are inlined detail that belongs in reference files. Some structure and organization, but broken references and inline bulk prevent a 4.

Specificity

Names the domain ('ambient signal capture') and two detection actions ('detect original thinking and entity mentions', 'use an authorized sub-agent ... otherwise detect inline'), but omits the concrete write actions the skill performs (create/enrich brain pages, back-links, timeline entries). This matches 'names domain and 1-2 concrete actions, but not comprehensive' rather than score 4's 'several specific actions; minor gaps'.

Completeness

Both 'what' (detect original thinking and entity mentions) and 'when' ('After explicit enablement, applies on substantive inbound messages') are explicitly stated. Not 5 because the when-clause states a precondition/state rather than a concrete user trigger phrase, and not 3 because the when is explicit, not merely implied.

Trigger Term Quality

Terms like 'ambient signal capture', 'original thinking', and 'entity mentions' are somewhat relevant but jargon-leaning; natural user phrasings ('remember my ideas', 'capture what I say', 'brain capture') and synonyms are missing. Some relevant keywords but missing common variations, so not 4; more than one or two generic keywords, so above 2.

Distinctiveness Conflict Risk

The opt-in ambient brain-capture niche with sub-agent routing is mostly distinct with a clear trigger condition, with only minor overlap risk against general memory/note-taking skills. Not 5: 'signal capture' and 'entity mentions' could still collide with memory or note-taking skills.