feat: add structured wide event logging#5
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jordangarrison merged 13 commits intomainfrom Feb 20, 2026
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Canonical log line / wide event pattern for structured JSON logging across GitHub API calls, Poller GenServer, LiveView sessions, and HTTP requests using LoggerJSON + custom WideEvent module.
8-task TDD implementation plan covering LoggerJSON setup, WideEvent core module, Req logger plugin, HTTP telemetry handler, Poller integration, and LiveView logging.
- Add logger_json ~> 7.0 dependency - Replace default formatter with LoggerJSON.Formatters.Basic - Suppress default Phoenix request logging (handled via telemetry) - Set dev log level to :debug for wide event visibility - Add LOG_LEVEL runtime env var override
Add Greenlight.WideEvent module that wraps Logger.metadata/1 for accumulating context and provides emit/3 for structured event emission with automatic timing and error capture via with_context/3.
Req plugin that emits wide events for every GitHub API call with request/response metadata including endpoint, status, duration, response size, and rate limit headers. Logs at debug for 2xx, info for rate limit warnings (<100 remaining), error for 4xx/5xx.
Logger.metadata/1 only sets metadata on the calling process. The environment context (app_version, node, env, git_sha) was not appearing in log events from Poller, LiveView, or HTTP request handler processes. Switch to :logger.update_primary_config/1 which sets metadata globally for all processes, ensuring environment context appears in every event.
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Summary
Greenlight.WideEventcore module for accumulating context and emitting single context-rich events per logical operationGreenlight.GitHub.ReqLoggerReq plugin that automatically logs every GitHub API call with endpoint, status, duration, response size, and rate limit infoGreenlight.RequestLoggertelemetry handler for HTTP request logging via[:phoenix, :endpoint, :stop]:logger.update_primary_config/1so environment context appears in all process logsTest Plan
mix format --check-formattedpassesmix compile --warnings-as-errorspassesLOG_LEVEL=debug mix phx.server