docs(telemetry): instrumentation conventions + snake_case attribute keys#996
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…e keys Add src/instrumentation/CONVENTIONS.md documenting how telemetry is structured (explicit span threading, imperative setProperty, event/attribute naming, namespace grouping, properties vs measurements) and link it from CONTRIBUTING. Align existing instrumentation with the OTel naming convention: - rename caller-supplied property/measurement keys from camelCase to snake_case (auth, ssh, workspace, activation, websocket, cli.download); - strip unit suffixes from exported metric names into the OTLP unit field (latency_ms -> metric latency, unit ms) so Prometheus suffixes cleanly; - group the token-refresh span under its namespace (auth.token_refreshed -> auth.token_refresh.completed) next to auth.token_refresh.deduped. Framework-managed result/durationMs are left unchanged.
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This was referenced Jun 9, 2026
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What
Establishes a shared style for local telemetry instrumentation so the in-flight telemetry branches can converge on one convention.
src/instrumentation/CONVENTIONS.md(linked fromCONTRIBUTING.md) covering:setProperty), and you never return a value purely to log it,domain.snake_case(past tense for point-in-time logs), and attribute keys follow the OTel convention — lowercase,.for hierarchy,_for words, never camelCase,auth,ssh,workspace,activation,websocket, andcli.download(e.g.cacheSource/workspaceName/maxBackoffMs-style →cache_source/workspace_name/*_ms). The metrics export unit-suffix table is updated to match. Framework-managedresult/durationMs(never emitted as attributes) are left as-is.Why
Telemetry is local-only and unreleased, so unifying the naming now is free. Merging this first gives the other telemetry branches a conformant base to rebase onto and a doc to follow.