Conciseness

Nearly every line carries non-obvious, Maple/Mastra-specific facts Claude cannot know ('OtelExporter's custom provider reads NO env vars', 'keys are region-bound', 'Batch interval is 5 s', the three Mastra 1.71 export gaps), with no padding about what OpenTelemetry or Mastra is. It is 4 rather than 5 because the ~215-line body repeats a few facts ('update all three together' and the region-bound-401 guidance each appear in both the steps and Troubleshooting) and some bullets could be tightened.

Actionability

Fully executable end to end: an install command, a complete copy-paste `mapleSpanProcessor` implementation, a complete `new Observability`/`OtelExporter` config with exact required keys (`protocol: "http/protobuf"`, `excludeSpanTypes`), and a symptom→fix troubleshooting table. This matches the anchor 'Fully executable; copy-paste ready code or commands' and exceeds level 4, which allows minor gaps — every setup decision is given a concrete value.

Workflow Clarity

Steps 0–7 are clearly sequenced (detect → key/region → install/init → session id → content → tools/errors/sub-agents → flush → verify) with an explicit validation checkpoint: Step 7 is a concrete verification checklist, and Troubleshooting maps observed symptoms back to fixes (feedback loops). This matches 'Clear sequence with explicit validation steps; feedback loops for error recovery'.

Progressive Disclosure

The body is well-sectioned (numbered steps, Troubleshooting, Do not) and reads as one cohesive procedure rather than a wall of text, and no bundle files exist to reference. It is 4 rather than 5 because the skill ships everything inline at ~215 lines: the troubleshooting table and the Step 5 edge-case explanations (HITL double-export, supervisor lane mechanics) are self-contained material that could live in a one-level-deep reference file to shrink the always-loaded context.

Specificity

It names the exact mechanism and multiple concrete outcomes: 'export Mastra's built-in GenAI spans through @mastra/otel-exporter so each conversation is one Maple Agent Session with transcript, tool calls, sub-agent lanes and tokens'. That covers the tool, the action, and the resulting artifacts comprehensively — matching 'Lists multiple specific concrete actions' — not level 4, since there is no noticeable coverage gap in what the skill does.

Completeness

Both halves are explicit: the 'what' ('Trace Mastra agents and workflows with Maple: export ... spans through @mastra/otel-exporter ...') and an explicit 'when' clause ('Triggers on 'trace my mastra agent', 'add Maple to mastra', ...') with concrete trigger phrases — exactly the level-5 anchor.

Trigger Term Quality

The four explicit triggers ('trace my mastra agent', 'add Maple to mastra', 'agent sessions for mastra', 'OpenTelemetry for mastra') are all phrases a user would naturally say, plus body keywords like transcript, tool calls, and tokens. It is 4 rather than 5 because common variants such as 'mastra telemetry', 'mastra observability', or 'monitor my mastra agent' are absent, and 4 rather than 3 because several relevant natural keywords are present, not just one or two.

Distinctiveness Conflict Risk

The Mastra+Maple pairing, the named @mastra/otel-exporter package, and Mastra-specific trigger phrases form a clear niche with essentially no overlap risk against generic tracing or OpenTelemetry skills — the level-5 anchor for distinct triggers.