Conciseness

The opening paragraph 'Ably is a realtime data delivery platform. Developers use it to build live and collaborative experiences' explains a concept Claude already knows, and lines like 'This will either open a browser for authentication...' could be tightened. The remainder is mostly efficient command-plus-brief-explanation prose, matching the 'mostly efficient but includes some unnecessary explanation' anchor rather than anchor 4's 'minor instances'.

Actionability

Commands are fully executable and copy-paste ready throughout: 'membrane connection ensure "https://ably.com" --json', 'membrane action run <actionId> --connectionId=CONNECTION_ID --input \'{"key": "value"}\' --json', a complete 18-action catalog with keys, and a full proxy flag table. This matches the anchor for fully executable, copy-paste ready commands covering common cases; anchor 4 would require minor gaps, which are absent.

Workflow Clarity

There is a clear install → login → connect → poll → discover → run sequence with explicit state-based checkpoints ('READY', 'CLIENT_ACTION_REQUIRED' → show uiUrl then re-poll, 'CONFIGURATION_ERROR' → check error field), which is genuine error-recovery guidance. It falls short of anchor 5 due to a dangling 'skip to Step 2' reference with no Step 2 heading and an inconsistent invocation ('npx @membranehq/cli connection get' vs 'membrane connection get').

Progressive Disclosure

The body has good structure with clear section headers, a table of contents-like 'Ably Overview', and well-organized action and flag tables, and no bundle files exist so nothing is misfiled. It is not anchor 5 because the 18-row action catalog and CLI reference are inline API-reference material that could be split into a references file for a leaner SKILL.md, though this is a minor organization gap rather than the inlined-wall-of-text problem of anchor 3.

Specificity

The description names the domain ('Ably integration') but its actions — 'Manage data, records, and automate workflows' — are generic with no concrete Ably operations (channels, messages, tokens, presence, push), matching anchor 2 ('Names the domain but actions are minimal or generic'). It is not anchor 3 because no 1-2 concrete actions are actually listed, and not anchor 1 because the domain is explicitly named.

Completeness

The 'Use when the user wants to interact with Ably data' clause provides an explicit trigger, but the 'what' — 'Manage data, records, and automate workflows' — is vague, sitting between anchor 3 (clear what, weak when) and anchor 4 (both present, when could be more explicit). Because the what is no clearer than the when, it lands below anchor 4's standard of 'Extract text from PDFs and fill forms. Use when working with PDF files.'

Trigger Term Quality

The only natural trigger keyword is the brand name 'Ably'; terms users would actually say for this skill — realtime, channels, publish/subscribe, messages, presence, push notifications, tokens — are all missing. This matches anchor 2 ('one or two generic keywords; missing the natural phrases users say') rather than anchor 3, which requires several relevant Ably-specific keywords.

Distinctiveness Conflict Risk

'Ably' is a distinct brand-name trigger giving this a clear niche with minimal conflict risk against other skills, matching anchor 4 ('mostly distinct; minor overlap risk'). It is not anchor 5 because the trailing 'Manage data, records, and automate workflows' phrasing could pull triggers from generic data/automation skills when Ably is not mentioned.