Rule D (dashboard PromQL labels must exist in L1) flagged `__name__` once the
phase-7 system-*.json dashboards started using `sum by (le, __name__)`.
`__name__` is the Prometheus reserved label for the metric name itself — a
builtin, not a span attribute. Add it to the builtin allowlist and cover it
with a test. (Earlier dashboards only used `__name__` inside `{__name__=~...}`
matchers, which the label regex did not extract, so this surfaced only now.)
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Three robustness fixes to check_otel_naming.py, all on phase-1c where the
script lives:
- Rule F now runs UNCONDITIONALLY. It is a purely syntactic check on the
call-sites and does not need the L1 key set, so code that calls
SpanGuard::span/setAttribute directly without ever defining a *SpanNames.h
is still caught (previously it was silently skipped when no header existed).
- Exempt test files from Rule F (tests pass arbitrary literal keys to exercise
the API). The call-site matcher now requires a SpanGuard/`.`/`->` receiver,
so std::span and bare declarations no longer false-positive.
- Add Rule H (warning, non-fatal): a namespace-qualified constant used at a
telemetry call-site but not defined in any *SpanNames.h is flagged, catching
constants defined in-place instead of in the proper header. Bare locals and
std:: names are not warned to avoid noise.
SpanGuard.h / Telemetry.h @code examples updated to reference constants that
exist on this branch. README documents the new behavior.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Add Rule G to check_otel_naming.py: every span-attribute key must be
lower_snake_case (^[a-z][a-z0-9_]*$ per dot-separated segment). This catches
camelCase, UPPERCASE, and spaces in keys, which the structural (dotted) and
source (literal) rules did not. Document it in the script README and
CONTRIBUTING.md.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Add check_otel_naming.py and wire it into on-pr.yml so every PR validates
that span-attribute names stay consistent across the code, collector, Tempo,
dashboards, and docs.
- The valid key set is derived dynamically from the *SpanNames.h constants and
the resource attributes the code registers in Telemetry.cpp — no hardcoded
allowlist to drift.
- Each rule is presence-gated: it runs only when the file it needs is in the
tree, so the check is correct whether telemetry changes land in one PR or
several (the collector/Tempo/dashboard/runbook layers arrive in later phases).
- Rule A flags dotted span-attribute keys; Rule F flags string-literal
attribute keys and span-name arguments (values may be runtime data).
- stdlib-only, mirroring the levelization check (bare `python`, no pip step).
- Telemetry.h / SpanGuard.h @code examples now use *SpanNames.h constants so
the strict literal check passes.
- CONTRIBUTING.md documents the check and how to run it locally.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
