Conciseness

The bulk of the body is lean, exact command blocks ("Run these commands exactly as below") with tight, purposeful prose — every harness gets its command with no conceptual padding Claude doesn't need. Minor inefficiencies keep it below a 5: the 'Update ACP and MCP SDKs everywhere' section re-inlines example commands already given verbatim, and '--config.minimumReleaseAge=4320' is hardcoded in 15 commands even though the text defers to 'pnpm-workspace.yaml', inviting drift.

Actionability

Fully executable, copy-paste-ready commands throughout: exact pnpm commands per harness, a concrete curl command to discover the latest fx release plus its test command, a generalizable pattern given as placeholder templates with worked examples, and a runnable verification script (./tools/verify-harness-adapter-deps.mjs). This matches the score-5 anchor; nothing is pseudocode or vague.

Workflow Clarity

The sections form a clear sequence (SDK updates → bridge updates → pinned fx version with test → example deps → global ACP/MCP sweep → manifest alignment) and end with an explicit feedback loop for this batch operation: "If this script shows errors, you must address them, then rerun the verification script until it passes." This is the validate → fix → retry pattern of the score-5 anchor; the batch-operation cap does not apply because validation is present.

Progressive Disclosure

No bundle files exist, so all content is inline; sections are clearly headed and easy to navigate, placing it above the score-3 anchor. It is not a 5: at 144 lines it exceeds the under-50-line simple-skill exception, the opening intro is too thin to serve as an overview, and '#### Example dependencies' nests oddly as a subsection under the fx CLI section rather than standing as a peer step.

Specificity

"Update the primary SDK dependencies of harness packages" names the domain and a single concrete action, but does not enumerate the several distinct operations the skill body actually covers (SDK bumps, bridge manifest alignment, pinned fx version, verification). It fits the 'names domain and 1-2 concrete actions' anchor, not the 'lists several specific actions' anchor above.

Completeness

Both parts are present: the what ("Update the primary SDK dependencies of harness packages") and an explicit when ("Use when asked to update the harness SDKs or harness adapter dependencies"). The when-clause largely echoes the what rather than adding new concrete trigger phrases, matching the score-4 anchor ('when could be more explicit or specific'); it is not score 3 because the trigger guidance is explicit, and not 5 because it adds no distinct trigger variations.

Trigger Term Quality

Terms like "update", "SDK", "harness", "adapter", and "dependencies" are natural phrasings a user in this domain would say, giving good keyword coverage. Common synonyms such as "bump", "upgrade", or "keep up to date" are missing, so it falls between the 3 and 5 anchors — noticeably above the midpoint.

Distinctiveness Conflict Risk

"harness packages", "harness SDKs", and "harness adapter dependencies" define a clear internal niche with distinct triggers that would rarely collide with other skills. This matches the score-5 anchor ('clear niche with distinct triggers; minimal conflict risk'); the neighboring anchor 4 would require actual overlap risk, which the distinctive 'harness' terminology avoids.