Conciseness

Mostly lean — two tight DQL queries, a dense status table, and pointed search instructions — but a few tokens could be trimmed: "Dynatrace extensions allow you to extend the functionality of Dynatrace by integrating with external systems and custom data sources" is generic filler, and the "When to use this skill" bullets duplicate the frontmatter description. Not 5 because not every token earns its place; not 3 because the padding is minor and there is no explanation of concepts Claude already knows beyond the opening sentence.

Actionability

Both DQL queries ("timeseries count(dt.sfm.extension.config.status), by: {...}" and "fetch dt.system.events | filter ...") are copy-paste ready with clearly-marked placeholders, the error-code regex "DEC:[A-Z0-9_]+" is concrete, and the reference-file lookup instructions ("Search for the specific error code heading (e.g. `## Error Code DEC:1D6`) ... read the next ~50 lines. Stop at the next `## Error Code` header") are exactly executable. Common cases (non-OK status, restarts, no data) are each covered with specific steps.

Workflow Clarity

A clear decision sequence is present — run the status query, "If a status is not `OK`, get detailed logs", extract the DEC code, then search the reference — and the Troubleshooting section enumerates issue-specific remediations. Not 5 because the sequence is distributed across sections rather than given as one ordered workflow, the heading "### 2. Retrieve Extension Event Logs" is numbered with no corresponding "### 1.", and checkpoints are implicit (e.g., no explicit 'verify the config is enabled' gate before fetching logs); not 3 because the ordering and decision points are unambiguous and the read-only nature of the operations means no destructive-operation validation cap applies.

Progressive Disclosure

The 133-entry error-code catalog is appropriately split into references/extensions-error-codes.md (verified to exist and match the documented "## Error Code DEC:<code>" structure), referenced one level deep, clearly signaled, and accompanied by explicit load-avoidance guidance ("**Do not load the full file.**"). The inline status table is compact, frequently-needed content that belongs in the body, matching the clear-overview anchor exactly.

Specificity

"checking extension monitoring configuration status, diagnosing extension errors, or interpreting extension error codes" lists multiple concrete actions that comprehensively cover this narrow skill's full workflow. Not 4 because there is no meaningful coverage gap — status checking, error diagnosis, and error-code interpretation map onto everything the skill body actually does.

Completeness

Explicitly answers what ("Dynatrace extension status checks and troubleshooting" plus three elaborated actions) and when ("Use when checking... diagnosing... or interpreting...") with concrete trigger phrases. This matches the 5 anchor exactly; the 4 anchor requires a 'when' that is less explicit, which is not the case here.

Trigger Term Quality

Ten natural trigger phrases including synonyms and technical jargon a real user would encounter: "extension status", "extension not working", "EEC error", "extension troubleshooting", "DEC error code", "extension startup failed", "high memory extension", "extension verification error". Matches the comprehensive-with-synonyms anchor rather than the 4 anchor, which expects only good-but-incomplete coverage.

Distinctiveness Conflict Risk

Scoped to a clear niche (Dynatrace extensions specifically) with explicit negative boundaries: "Do NOT use for explaining existing queries, product documentation questions, or OneAgent/ActiveGate installation issues unrelated to extensions." Minimal conflict risk; the 4 anchor's 'minor overlap risk' does not apply given the explicit exclusions.