SKILL.md
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Run these commands to understand the project before making any recommendations:
# Detect React Router Framework indicators and versions
cat package.json | grep -E '"react-router"|"@react-router/"|"react-router-dev"|"react-router-serve"'
# Detect Sentry package choice
cat package.json | grep -E '"@sentry/react-router"|"@sentry/react"|"@sentry/profiling-node"'
# Check entry point visibility and server instrumentation files
ls entry.client.tsx entry.server.tsx instrument.server.mjs react-router.config.ts vite.config.ts 2>/dev/null
# Check if React Router files are still hidden (framework mode helper command available)
cat package.json | grep -E '"reveal"|react-router'
# Detect runtime startup scripts and import strategy
cat package.json | grep -E '"dev"|"start"|NODE_OPTIONS|--import'
# Detect optional logging/profile-related dependencies
cat package.json | grep -E '"pino"|"winston"|"@sentry/profiling-node"'
# Detect companion backend directories
ls ../backend ../server ../api 2>/dev/null
cat ../go.mod ../requirements.txt ../Gemfile ../pom.xml 2>/dev/null | head -3
What to determine:
Question
Impact
@sentry/react-router already installed?
Skip install and move to feature setup
Framework entry files exposed?
Need npx react-router reveal before manual config
Using @sentry/react instead?
This is likely non-framework routing; redirect to sentry-react-sdk
react-router.config.ts + Vite config present?
Source map upload and build-end hook setup path
NODE_OPTIONS --import available?
Preferred server instrumentation startup path
@sentry/profiling-node desired/available?
Enable server profiling integration
Backend directory found?
Trigger Phase 4 cross-link suggestion
Phase 2: Recommend
Present a concrete recommendation based on what you found. Do not ask open-ended questions — lead with a proposal:
Recommended (core coverage):
- ✅ Error Monitoring — always; captures client and server errors with framework hooks
- ✅ Tracing — recommended baseline in framework apps with client/server request flow
- ✅ Session Replay — recommended for user-facing applications
Optional (enhanced observability):
- ⚡ Profiling — server-side profiling with
@sentry/profiling-node
- ⚡ Logs — structured
Sentry.logger.*ingestion and correlation
- ⚡ User Feedback — in-app feedback widget/reporting flows
Recommendation logic:
Feature
Recommend when...
Error Monitoring
Always — non-negotiable baseline
Tracing
Usually yes in framework apps; route and request timing is high-value
Session Replay
User-facing product or difficult UX debugging
Profiling
Server performance investigations needed; Node runtime compatibility verified
Logs
Team wants log-search and trace correlation in Sentry
User Feedback
Product/support teams need direct in-app issue reports
Propose: "I recommend Error Monitoring + Tracing + Session Replay first. Want me to also enable Profiling, Logs, and User Feedback?"
Phase 3: Guide
Option 1: Wizard (Recommended)
You need to run this yourself — the wizard is interactive and may require browser login:
npx @sentry/wizard@latest -i reactRouter
It installs @sentry/react-router, exposes React Router entry files, creates instrumentation files, updates root error handling, configures source map upload, and adds verification examples.
Once it finishes, continue at [Verification](#verification).
If the user skips wizard setup, continue with manual setup below.
Option 2: Manual Setup
#### Install packages
npm install @sentry/react-router --save
If profiling is needed:
npm install @sentry/profiling-node --save
#### Expose framework entry files
npx react-router reveal
#### Configure client in entry.client.tsx
import * as Sentry from "@sentry/react-router";
import { startTransition, StrictMode } from "react";
import { hydrateRoot } from "react-dom/client";
import { HydratedRouter } from "react-router/dom";
Sentry.init({
dsn: "___PUBLIC_DSN___",
sendDefaultPii: true,
integrations: [
Sentry.reactRouterTracingIntegration(),
Sentry.replayIntegration(),
Sentry.feedbackIntegration({ colorScheme: "system" }),
],
enableLogs: true,
tracesSampleRate: 1.0,
tracePropagationTargets: [/^\//, /^https:\/\/yourserver\.io\/api/],
replaysSessionSampleRate: 0.1,
replaysOnErrorSampleRate: 1.0,
});
startTransition(() => {
hydrateRoot(
document,
<StrictMode>
<HydratedRouter onError={Sentry.sentryOnError} />
</StrictMode>,
);
});
#### Configure server in instrument.server.mjs
import * as Sentry from "@sentry/react-router";
import { nodeProfilingIntegration } from "@sentry/profiling-node";
Sentry.init({
dsn: "___PUBLIC_DSN___",
sendDefaultPii: true,
enableLogs: true,
integrations: [nodeProfilingIntegration()],
tracesSampleRate: 1.0,
profileSessionSampleRate: 1.0,
});
#### Wrap server handlers in entry.server.tsx
import * as Sentry from "@sentry/react-router";
import { createReadableStreamFromReadable } from "@react-router/node";
import { renderToPipeableStream } from "react-dom/server";
import { ServerRouter } from "react-router";
const handleRequest = Sentry.createSentryHandleRequest({
ServerRouter,
renderToPipeableStream,
createReadableStreamFromReadable,
});
export default handleRequest;
export const handleError = Sentry.createSentryHandleError({
logErrors: false,
});
For custom server logic, use wrapSentryHandleRequest, getMetaTagTransformer, and manual Sentry.captureException in your custom handleError.
#### Load server instrumentation on startup
Prefer NODE_OPTIONS --import:
{
"scripts": {
"dev": "NODE_OPTIONS='--import ./instrument.server.mjs' react-router dev",
"start": "NODE_OPTIONS='--import ./instrument.server.mjs' react-router-serve ./build/server/index.js"
}
}
Fallback for platforms where runtime flags are restricted:
import "./instrument.server.mjs";
This direct-import method can result in incomplete auto-instrumentation compared to --import.
#### Configure source maps
vite.config.ts:
import { reactRouter } from "@react-router/dev/vite";
import {
sentryReactRouter,
type SentryReactRouterBuildOptions,
} from "@sentry/react-router";
import { defineConfig } from "vite";
const sentryConfig: SentryReactRouterBuildOptions = {
org: "___ORG_SLUG___",
project: "___PROJECT_SLUG___",
authToken: process.env.SENTRY_AUTH_TOKEN,
};
export default defineConfig((config) => {
return {
plugins: [reactRouter(), sentryReactRouter(sentryConfig, config)],
};
});
react-router.config.ts:
import type { Config } from "@react-router/dev/config";
import { sentryOnBuildEnd } from "@sentry/react-router";
export default {
ssr: true,
buildEnd: async ({ viteConfig, reactRouterConfig, buildManifest }) => {
await sentryOnBuildEnd({ viteConfig, reactRouterConfig, buildManifest });
},
} satisfies Config;
For Each Agreed Feature
Walk through features one at a time. Load the reference file, follow steps exactly, and verify before moving on:
Feature
Reference
Load when...
Error Monitoring
${SKILL_ROOT}/references/error-monitoring.md
Always
Tracing
${SKILL_ROOT}/references/tracing.md
Route/request performance visibility needed
Profiling
${SKILL_ROOT}/references/profiling.md
Server performance analysis needed
Session Replay
${SKILL_ROOT}/references/session-replay.md
User-facing app
Logs
${SKILL_ROOT}/references/logging.md
Structured logs/correlation needed
User Feedback
${SKILL_ROOT}/references/user-feedback.md
In-app feedback flows needed
Framework Features
${SKILL_ROOT}/references/react-router-framework-features.md
Entry files, wrappers, source maps, startup import strategy
For each feature: Read ${SKILL_ROOT}/references/<feature>.md, follow steps exactly, verify it works.
Configuration Reference
Key Sentry.init() options
Option
Type
Default
Notes
dsn
string
—
Required; SDK disabled when empty
sendDefaultPii
boolean
false
Includes headers/IP-derived user context
integrations
Integration[]
SDK defaults
Add tracing/replay/feedback/profiling integrations
enableLogs
boolean
false
Enables Sentry.logger.* ingestion
tracesSampleRate
number
—
Usually 1.0 in testing, lower in production
tracePropagationTargets
(string
RegExp)[]
SDK defaults
replaysSessionSampleRate
number
—
Fraction of all sessions recorded
replaysOnErrorSampleRate
number
—
Fraction of error sessions recorded
profileSessionSampleRate
number
—
Fraction of transactions profiled (server profiling)
tunnel
string
—
Optional ad-blocker bypass endpoint
debug
boolean
false
Verbose SDK diagnostics
Framework-specific APIs
API
Purpose
reactRouterTracingIntegration()
Client-side tracing integration for framework mode
sentryOnError
Hooks into React Router HydratedRouter error reporting
createSentryHandleRequest(...)
Server request wrapper for framework entry server
createSentryHandleError(...)
Server error handler wrapper
wrapServerLoader(...) / wrapServerAction(...)
Manual wrapping for server loaders/actions
sentryReactRouter(...)
Vite plugin for source maps/build integration
sentryOnBuildEnd(...)
React Router build-end hook for source map processing
Verification
Wizard-generated path
If wizard examples were generated, open /sentry-example-page and trigger test actions.
Manual error test
export async function loader() {
throw new Error("My first Sentry error!");
}
Manual tracing test
import * as Sentry from "@sentry/react-router";
export async function loader() {
return Sentry.startSpan(
{ op: "test", name: "My First Test Transaction" },
() => {
throw new Error("My first Sentry error!");
},
);
}
Logs test
Sentry.logger.info("User example action completed");
Sentry.logger.warn("Slow operation detected", { operation: "data_fetch", duration: 3500 });
Sentry.logger.error("Validation failed", { field: "email", reason: "Invalid email" });
Confirm in Sentry:
- Issues: errors appear
- Traces: transaction/span data appears
- Profiles: profiles appear when profiling enabled
- Replays: replay entries appear when enabled
- Logs: log events appear when
enableLogs: true
- User Feedback: submissions appear when feedback enabled
Phase 4: Cross-Link
After completing React Router Framework setup:
- Check whether the app is actually non-framework routing (v5/v6/v7 data/declarative with
@sentry/react).
- If yes, redirect to
sentry-react-sdkfor non-framework routing integrations.
Then check companion backend coverage:
ls ../backend ../server ../api ../go ../python 2>/dev/null
cat ../go.mod ../requirements.txt ../pyproject.toml ../Gemfile ../pom.xml 2>/dev/null | head -5
Backend detected
Suggest skill
Go
sentry-go-sdk
Python
sentry-python-sdk
Ruby
sentry-ruby-sdk
Node backend services
sentry-node-sdk
Java services
Use @sentry/java docs
Troubleshooting
Issue
Solution
entry.client.tsx / entry.server.tsx missing
Run npx react-router reveal first
Client errors missing
Ensure HydratedRouter includes onError={Sentry.sentryOnError}
Server errors missing
Use createSentryHandleRequest and createSentryHandleError wrappers
Custom server handlers bypass Sentry
Use wrapSentryHandleRequest and manual captureException in custom handleError
Source maps not uploaded
Verify sentryReactRouter plugin config and sentryOnBuildEnd hook
SENTRY_AUTH_TOKEN undefined in Vite config
Load env vars in config or use .env.sentry-build-plugin
Incomplete server auto-instrumentation
Prefer NODE_OPTIONS='--import ./instrument.server.mjs' startup
Profiling data missing
Confirm @sentry/profiling-node installed and nodeProfilingIntegration enabled
Running unsupported Node auto-instrumentation version
Use instrumentation API/manual wrappers as documented
Non-framework app configured with @sentry/react-router
Switch to sentry-react-sdk + @sentry/react for v5/v6/v7 non-framework routes