evlog

Analyze application logs from the .evlog/logs/ directory. Use when debugging errors, investigating slow requests, understanding request patterns, or answering questions about application behavior. Reads structured NDJSON wide events written by evlog's file system drain.

Build or review audit trails in TypeScript/JavaScript apps using evlog (pipelines, typed actions, denials, retention, compliance-style reviews). For application code, not for extending the evlog package.

Create a new built-in evlog adapter to send wide events to an external observability platform. Use when adding a new drain adapter (e.g., for Elasticsearch, Honeycomb, SigNoz, etc.) to the evlog package. Covers source code, build config, package exports, tests, e2e, and all documentation.

Create a new built-in evlog enricher to add derived context to wide events. Use when adding a new enricher (e.g., for deployment metadata, tenant context, feature flags, etc.) to the evlog package. Covers source code, tests, and all documentation.

Create a new evlog framework integration to add automatic wide-event logging to an HTTP framework. Use when adding middleware/plugin support for a framework (e.g., Koa, H3 standalone, Deno Fresh, etc.) to the evlog package. Covers source code, build config, package exports, tests, example app, and all documentation.

Add a new rule or a new framework adapter to `evlog map` in @evlog/cli. Use when adding a coverage check (requirement or opportunity) that scores entry points, or when extending the map scanner to a new framework. Covers rule source, registry, types, tests, docs, and the published skill.

Review code for logging patterns and suggest evlog adoption. Optionally use @evlog/cli (`evlog init` to wire evlog, `evlog agents` to write the conventions into AGENTS.md, `evlog map` to score entry-point coverage, `--baseline` to gate regressions in CI) on Nuxt, Nitro, Next.js, TanStack Start, and Hono. Guides setup on those plus SvelteKit, React Router, NestJS, Express, Fastify, Elysia, oRPC, Cloudflare Workers, AWS Lambda, Astro, and standalone TypeScript. Detects console.log spam, unstructured errors, and missing context. Covers wide events, structured errors, drain adapters (Axiom, OTLP, HyperDX, PostHog, Sentry, Better Stack, Datadog, Loki, ClickHouse, NuxtHub, Memory), sampling, enrichers, and AI SDK integration.

Write, review, and rewrite any evlog content: a docs page, the landing, a blog post, a package README, a skill, an AGENTS.md, a changeset. Load before drafting or editing prose in apps/docs/content, before writing a blog post, before touching a SKILL.md or an AGENTS.md, and whenever content is reviewed for voice, accuracy, or AI-generated slop. Carries the evlog voice, the atomic rules, the terminology, the competitor dossiers, and the AI-tell corpus with the legitimate twin for each tell.