feat(orpc): add oRPC integration

.changeset/orpc-integration.md

@@ -0,0 +1,34 @@
+---
+'evlog': minor
+---
+
+Add oRPC integration (`evlog/orpc`) with automatic wide-event logging. Two complementary primitives:
+
+- `withEvlog(handler)` — wraps `RPCHandler` / `OpenAPIHandler` from `@orpc/server/fetch`. Each matched request becomes one wide event with full pipeline support (drain, enrich, `include`/`exclude`, route-based service overrides, tail sampling). Excluded routes still receive a no-op `context.log` so procedures never crash on missing fields.
+- `evlog()` — procedure-level middleware (`os.use(evlog())`). Tags the wide event with `operation` (procedure path joined with `.`), forwards the request logger as `context.log`, and promotes the level to `error` when a procedure throws.
+
+```ts
+import { os } from '@orpc/server'
+import { RPCHandler } from '@orpc/server/fetch'
+import { evlog, withEvlog, type EvlogOrpcContext } from 'evlog/orpc'
+
+const base = os.$context<EvlogOrpcContext>().use(evlog())
+
+const router = {
+  ping: base.handler(({ context }) => {
+    context.log.set({ pinged: true })
+    return { ok: true }
+  }),
+}
+
+const handler = withEvlog(new RPCHandler(router))
+
+export default async function fetch(request: Request) {
+  const { matched, response } = await handler.handle(request, { prefix: '/rpc' })
+  return matched ? response : new Response('Not Found', { status: 404 })
+}
+```
+
+`useLogger()` is exposed for off-context access (utility modules / deep service functions). `EvlogOrpcContext` is the type to plug into `os.$context()` for typed access.
+
+Closes [#297](https://github.com/HugoRCD/evlog/issues/297).

.github/pull_request_template.md

@@ -43,6 +43,7 @@ scope.
 - next (Next.js integration)
 - nitro (Nitro plugin)
 - nuxt (Nuxt module)
+- orpc (oRPC integration)
 - otlp (OTLP drain adapter)
 - playground (the playground app)
 - posthog (PostHog drain adapter)

.github/workflows/semantic-pull-request.yml

@@ -42,6 +42,7 @@ jobs:
             next
             nitro
             nuxt
+            orpc
             otlp
             playground
             posthog

apps/docs/app/components/features/FeatureFrameworks.vue

@@ -32,6 +32,7 @@ const frameworkRows = [
     { name: 'Hono', icon: 'i-simple-icons-hono', tab: 8 },
     { name: 'Fastify', icon: 'i-simple-icons-fastify', tab: 9 },
     { name: 'Elysia', icon: 'i-custom-elysia', tab: 10 },
+    { name: 'oRPC', icon: 'i-lucide-network', tab: 13 },
     { name: 'Cloudflare', icon: 'i-simple-icons-cloudflare', tab: 11 },
     { name: 'Vite', icon: 'i-custom-vite', link: '/reference/vite-plugin' },
   ],
@@ -153,6 +154,9 @@ const frameworkRows = [
       <div v-show="activeTab === 12" class="landing-code">
         <slot name="bun" />
       </div>
+      <div v-show="activeTab === 13" class="landing-code">
+        <slot name="orpc" />
+      </div>
     </Motion>
   </section>
 </template>

apps/docs/content/0.landing.md

@@ -425,6 +425,32 @@ A modern TypeScript logger built for everything you ship. Simple logs, wide even
     })
   ```
 
+  #orpc
+  ```ts [server/orpc.ts]
+  import { os } from '@orpc/server'
+  import { RPCHandler } from '@orpc/server/fetch'
+  import { evlog, withEvlog, type EvlogOrpcContext } from 'evlog/orpc'
+  import { createAxiomDrain } from 'evlog/axiom'
+
+  const base = os.$context<EvlogOrpcContext>().use(evlog())
+
+  const router = {
+    checkout: base
+      .input(z.object({ cartId: z.string() }))
+      .handler(async ({ input, context }) => {
+        const cart = await db.findCart(input.cartId)
+        context.log.set({ cart: { items: cart.items.length, total: cart.total } })
+
+        const charge = await stripe.charge(cart.total)
+        context.log.set({ stripe: { chargeId: charge.id } })
+
+        return { orderId: charge.id }
+      }),
+  }
+
+  const handler = withEvlog(new RPCHandler(router), { drain: createAxiomDrain() })
+  ```
+
   #cloudflare
   ```ts [src/worker.ts]
   import { defineWorkerFetch, initWorkersLogger } from 'evlog/workers'

apps/docs/content/1.start/3.installation.md

@@ -170,6 +170,15 @@ After installing the package, follow the setup guide for your framework:
   :::
   :::card
   ---
+  icon: i-lucide-network
+  title: oRPC
+  to: /integrate/frameworks/orpc
+  color: neutral
+  ---
+  `withEvlog()` handler wrapper + `evlog()` procedure middleware.
+  :::
+  :::card
+  ---
   icon: i-simple-icons-cloudflare
   title: Cloudflare Workers
   to: /integrate/frameworks/cloudflare-workers

apps/docs/content/3.integrate/frameworks/00.overview.md

@@ -28,6 +28,7 @@ No HTTP framework? Use [Standalone TypeScript](/integrate/frameworks/standalone)
 | [Hono](/integrate/frameworks/hono) | `evlog/hono` | Middleware | `c.get('log')` | Stable |
 | [Fastify](/integrate/frameworks/fastify) | `evlog/fastify` | Plugin | `request.log` / `useLogger()` | Stable |
 | [Elysia](/integrate/frameworks/elysia) | `evlog/elysia` | Plugin | `log` (context) / `useLogger()` | Stable |
+| [oRPC](/integrate/frameworks/orpc) | `evlog/orpc` | Handler wrapper + middleware | `context.log` / `useLogger()` | Stable |
 | [Cloudflare Workers](/integrate/frameworks/cloudflare-workers) | `evlog/workers` | Factory | `createWorkersLogger()` | Stable |
 | [AWS Lambda](/integrate/frameworks/aws-lambda) | `evlog` | Manual | `createLogger()` / `createRequestLogger()` | Guide |
 | [Standalone](/integrate/frameworks/standalone) | `evlog` | Manual | `createLogger()` / `createRequestLogger()` | Stable |
@@ -143,6 +144,15 @@ No HTTP framework? Use [Standalone TypeScript](/integrate/frameworks/standalone)
   :::
   :::card
   ---
+  icon: i-lucide-network
+  title: oRPC
+  to: /integrate/frameworks/orpc
+  color: neutral
+  ---
+  Handler wrapper + procedure middleware exposing `context.log` and per-procedure `operation`.
+  :::
+  :::card
+  ---
   icon: i-simple-icons-cloudflare
   title: Cloudflare Workers
   to: /integrate/frameworks/cloudflare-workers