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signals-scout-apm

Signals scout for PostHog distributed tracing (APM / OpenTelemetry spans). Watches per-service RED metrics for error-rate and latency regressions, new error signatures, and traffic cliffs.

68

Quality

85%

Does it follow best practices?

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SecuritybySnyk

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The risk profile of this skill

SKILL.md
Quality
Evals
Security

Quality

Content

92%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

The body is highly actionable, well-sequenced with validation checkpoints, and properly offloads detail to bundled references; the only trim opportunity is the repeated rate-vs-total emphasis.

Suggestions

State the 'rate not raw total' discriminator once in the discriminator engine and reference it from the intro and disqualifiers instead of restating it three times.

DimensionReasoningScore

Conciseness

Dense and expert, assuming Claude knows tracing concepts, but the 'rate not raw total' discriminator is restated across the intro, discriminator engine, and disqualifiers and could be trimmed.

4 / 5

Actionability

Fully executable guidance with exact tool calls, JSON payloads (compareFilter), specific filters (statusCodes: [2], rootSpans/flatSpans), and concrete scratchpad key examples covering common cases.

5 / 5

Workflow Clarity

A clearly sequenced run (oriented → discriminator → explore → memory → decide → close out) with explicit validation checkpoints (denominator guard, latest-complete bucket, ≥2 buckets for cliffs) and a disqualifiers checklist.

5 / 5

Progressive Disclosure

Well-organized sections that defer detail to clearly signaled one-level-deep references (bundled exploring-apm-traces skill, authoring-scouts references/report-contract.md) rather than re-deriving them inline.

5 / 5

Total

19

/

20

Passed

Description

75%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

The description is specific, distinctive, and uses third person with concrete actions, but it lacks an explicit 'Use when...' trigger clause, which caps completeness.

Suggestions

Add an explicit 'Use when...' clause naming natural trigger phrases (e.g. 'Use when investigating per-service error-rate or latency regressions in PostHog tracing').

Soften the jargon with a couple of common-synonym trigger terms a user might actually say (e.g. 'slow requests', 'error spikes').

DimensionReasoningScore

Specificity

Names multiple concrete actions — 'error-rate and latency regressions, new error signatures, and traffic cliffs' — giving comprehensive coverage of the APM scout's distinct signals.

5 / 5

Completeness

Has a clear 'what' (scout for tracing, watches RED metrics) but no explicit 'Use when...' trigger guidance, capping completeness at 3 per the rubric guideline.

3 / 5

Trigger Term Quality

Strong natural terms ('PostHog distributed tracing', 'APM', 'OpenTelemetry spans', 'error-rate and latency regressions') but jargon-heavy and missing common synonyms or variations.

4 / 5

Distinctiveness Conflict Risk

A clear niche (PostHog distributed tracing/APM) explicitly separated from AI-observability and logs scouts, with minimal conflict risk.

5 / 5

Total

17

/

20

Passed

Validation

81%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 13 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

metadata_version

'metadata.version' is missing

Warning

frontmatter_unknown_keys

Unknown frontmatter key(s) found; consider removing or moving to metadata

Warning

referenced_paths_exist

Referenced path issues: 2 missing

Warning

Total

13

/

16

Passed

Repository

PostHog/posthog

Path

products/signals/skills/signals-scout-apm/SKILL.md

Reviewed

Table of Contents

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