Conciseness

Lean and competent — it assumes Claude's knowledge (no explaining what TTS, REST, or WebSockets are) and keeps sections tight. Minor trimmable material keeps it below anchor 5: the duplicated `func main() { if err := run(); err != nil { log.Fatal(err) } }` boilerplate in both quick-start examples and the promotional "Central product skills" section with its npx command.

Actionability

Two complete, copy-paste-ready Go programs with full import paths and error handling cover the two common cases (REST `ToSave` to file, WebSocket channel streaming with `Connect`/`Start`/`SpeakWithText`/`Flush`/`Stop`), plus a concrete model name (`aura-2-thalia-en`), an env-var command, and exact constructor and method names. Fully executable guidance covering the common cases.

Workflow Clarity

The usage sequence (set env → construct client → connect → speak → flush → stop) is clearly conveyed through the examples, with error checkpoints present in code ("if ok := conn.Connect(); !ok", checked `ToSave` and `SpeakWithText` returns). Not a destructive or batch operation so no cap applies, but the sequence is implicit in code rather than explicit steps with validation checkpoints, fitting anchor 4.

Progressive Disclosure

No bundle files exist (references/, scripts/, assets/ are absent), and none are needed: the body is a concise overview with well-organized sections, and the "API reference (layered)" section provides clearly signaled one-level-deep pointers (in-repo source paths, OpenAPI/AsyncAPI, product docs) so detail is never inlined. This matches the anchor for a clear overview with well-signaled one-level-deep references and easy navigation.

Specificity

Names the domain (Go, Deepgram Speak) and several concrete surfaces ("writing or reviewing Go code", "synthesizes audio with Speak v1 REST or Speak WebSockets"), matching the anchor listing several specific actions with minor gaps; it stops short of enumerating the skill's actual capabilities (REST-to-file, streaming, callback pipelines) that the body covers.

Completeness

The "when" is explicit and concrete ("Use when writing or reviewing Go code in this repo that synthesizes audio with Speak v1 REST or Speak WebSockets"), but the "what" is only embedded inside the when-clause; the description never states what the skill itself provides (usage patterns, examples, gotchas for the Go SDK Speak API). This fits anchor 4 (both present, one could be more explicit) rather than anchor 5.

Trigger Term Quality

Good natural keyword coverage ("Go", "synthesizes audio", "Speak v1 REST", "Speak WebSockets", "transcription", "voice conversation"), but the phrases users would most naturally say — "text-to-speech" and "TTS" — never appear in the description, fitting anchor 4 rather than comprehensive anchor 5.

Distinctiveness Conflict Risk

It carves a clear niche (Go + Speak TTS in this repo) and explicitly routes adjacent work away ("Route transcription work to deepgram-go-speech-to-text, voice conversation runtime work to deepgram-go-voice-agent, and repository maintenance work to deepgram-go-maintaining-sdk"), giving minimal conflict risk with closely related sibling skills.