Error context · for AI builders

Your AI sees the code.
snapfail shows it what happened in the browser.

When your app breaks, snapfail captures everything —stack trace, console, network, user clicks— and packages it as evidence your agent reads directly to find the root cause.

$ snapfail init
See how it works
One-command install Runs in the background No dashboards to watch
AstroViteNext.js
snapfail · live capture REC
01Error
02Capture
03Diagnosis
app.yourstore.com/checkout
Page stopped responding
TypeError: cannot read 'total' of undefined
Packaging incident evidence
Stack traceCart.jsx:42 · +6 frames
Console12 logs · 1 error
NetworkGET /api/cart → 200 · empty
Click replay8 actions · 14s
DeviceiPhone 14 · Safari 17
Root cause found
The cart arrived empty from the API, but checkout assumes it always exists.
/api/cart responded 200 with an empty body. The component read cart.total without checking that cart exists.
Fix prompt — ready to paste
In Cart.jsx:42, guard the access with cart?.total ?? 0 and show an empty cart state when the API returns an empty body.
Before & after

Stop telling your AI "something broke."

Without context, your agent guesses. With snapfail you hand it the full incident — and it gives back the root cause, not a hunch.

Without snapfailBlind guessing
⌘ chat with your agentcursor
hey something broke in checkout, can you fix it?
Uncaught TypeError: cannot read properties of undefined
I'm not sure what caused this. Which page did it happen on? Can you reproduce it? What browser were you using? Meanwhile, try checking the console and send me the full stack trace…
Back and forth, blurry screenshots, and a fix that might not even be the real problem.
With snapfailEvidence → diagnosis
⌘ chat with your agentcursor
$ snapfail explain inc_8f2a
● packaged incidentinc_8f2a · critical
ErrorTypeError: cannot read 'total' of undefined
OriginCart.jsx:42 · checkout
NetworkGET /api/cart → 200 (empty body)
Replay8 clicks · iPhone 14 · Safari
Root cause
The cart arrived empty from /api/cart and checkout read cart.total without checking it. Fix: cart?.total ?? 0 + empty cart state.
One command. The AI has everything the end user experienced, and goes straight to the fix.
The full flow

Four steps. The rest runs itself.

From install to diagnosis, snapfail lives in the background and only shows up when something matters.

01
$ snapfail init
Detects your framework, authenticates you, and injects the SDK. One command, zero config.
02
deploy
Deploy as normal. The SDK starts capturing errors in every end user's browser.
03
error
Something fails. Captures stack, console, network, click replay, and device type — instantly.
04
$ snapfail explain <id>
Your agent reads the evidence and diagnoses the root cause directly. Paste the fix and you're done.
Zero friction

One command and it's running.

You don't need to understand stack traces or configure anything. snapfail handles it — you just build.

terminal — your project
$ snapfail init Detecting framework… Next.js 15 found Authenticated as you@email.com SDK injected in app/layout.tsx All done. Deploy and snapfail starts capturing errors. ▸

One command

No manual SDK wiring, no keys to paste everywhere. snapfail init figures it all out.

Runs in the background

No dashboards to watch, no 3am alerts. It only surfaces when there's a real incident.

Built for your agent

Evidence comes out structured for the LLM to read directly — not for a human to decode metrics.

Astro · Vite · Next.js

First-class support for the frameworks AI builders actually use.

Pricing

Free while we're in beta.
No limits, no card.

Full access to everything during the beta period. When paid plans launch, early users get special terms.

Coming soon
Pro
$? /month

For teams and production projects at higher volume.

  • Everything in Free
  • Slack, GitHub, Linear integrations
  • Multiple team members
  • Proactive alerts
  • Advanced AI diagnosis
  • · Extended retention
  • · Support SLA

Pro pricing isn't set yet. Beta users will get early-adopter terms when it launches.

When something breaks, you'll already have the answer

Capture the error.
Paste the fix.

Give your agent what it's missing: what actually happened in the browser.

$snapfail init
See the flow