feat(module): add Cloudflare Workers adapter

[dmmulroy]

Summary

Adds first-class Cloudflare Workers support for evlog, addressing:

• PR fix: correctly read env on workers #21: process undefined in Workers breaks env detection
• Issue [bug] (possible) Cloudflare Observability - Duplicate Logs #18: Duplicate logs and requestId mismatch

Changes

• New Workers adapter (evlog/workers):

  • initWorkersLogger(options) - initialize with stringify: false for structured objects
  • createWorkersLogger(request, options) - request-scoped logger with auto-extracted context
  • Emits objects via console[level](event) for proper platform severity mapping

• Auto-extracted context:

  • cf-ray header as requestId
  • request.cf properties (colo, country, asn)
  • Method, path from request

• Core changes:

  • isDev() returns false in Workers (no process/window)
  • Added stringify?: boolean option to skip JSON.stringify (for Workers)
  • Simplified getConsoleMethod to identity function

Usage

import { initWorkersLogger, createWorkersLogger } from 'evlog/workers'

initWorkersLogger({ env: { service: 'my-api' } })

export default {
  async fetch(request: Request) {
    const log = createWorkersLogger(request)
    log.set({ user: { id: '123' } })
    log.emit({ status: 200 })
    return new Response('ok')
  }
}

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[github-actions]

Thank you for following the naming conventions! 🙏

[pkg-pr-new]

npm i https://pkg.pr.new/evlog@34

commit: f36ca16

[HugoRCD]

@dmmulroy Thank you very much for the PR, so thrilled to extend evlog support to other platforms!

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Project	Deployment	Actions	Updated (UTC)
evlog-docs	Ready	Preview, Comment	Feb 3, 2026 7:52pm