Production that
fixes itself.

Production should never go down. Rebar finds what broke, proves the fix, and ships it before your users notice. The goal is the end of on-call.

NewAuto-revert after a bad merge
Restore the Stripe charge id· checkout-apiVerified

Verified in a sandbox.

TestspassType-checkpass
Independent checkInstant rollback
94% confidence

Plugs into everything you already run

VercelGitHubClaudeOpenAI

Every minute of downtime costs you users and burns out the engineers paged to fix it. A machine can catch and fix most of it faster than a human can wake up. Rebar is the reinforcement under your stack.

FIG 0.1Detect
Isometric cluster of server blocks with one highlighted as an anomaly

Every system you run, watched on a loop.

FIG 0.2Prove
Isometric layered slab with a check seal etched on the top face

Proven in a sandbox before it ships.

FIG 0.3Revert
Isometric stack of plates with a return arrow lifting the top plate back

Rolled back the moment it slips.

Where Rebar fits

The worst bugs pass review.

Code review reads your diff and flags what looks wrong. But a clean diff still ships outages: a bad config, a regression no diff can show, a dependency that breaks at runtime. Rebar owns that half. It watches production and fixes what review never sees.

0.0Code review

Before it merges

  • Reads the pull request
  • Flags what might be wrong
  • A person applies the fix
  • Then it merges. Whatever it missed goes live.
1.0Rebar

After it deploys

  • Watches live production
  • Finds the deploy that broke it
  • Proves the fix, then ships it
  • Rolls it back if it slips

Run both. One guards the door. The other watches the room.

Know what broke, and why

Rebar reads your deploys and runtime on a tight loop. When something slips it names the cause in plain language, and tells you whether a dependency broke, your code regressed, or the change was intended.

1.0Diagnose
1.1Signals1.2Localization1.3Classification
rebar · checkout-api
Checkout 500s after deployExternal causeIndependent checkcritical

stripe@18 renamed the charge response, so every payment throws.

Saw

Error rate 0.1% to 12% within 4 min of deployStack trace points at charges.create responseStarted with the stripe 17 to 18 bump

Cause

app/api/charge.ts · createCharge92% confident

Ship fixes you can trust

Rebar doesn't merge on a hunch. It checks each fix against an independent source of truth, like a dependency's own types, then proves the fix builds and boots in a sandbox before a single line reaches production.

2.0Verify
2.1Independent source of truth2.2Sandbox proof2.3Reversible by default
rebar · inbox
Restore the Stripe charge id· checkout-apiVerified
app/api/charge.ts+1−1
@@ -42,7 +42,7 @@
const charge = await stripe.charges.create(req)
-const id = charge.id
+const id = charge.latest_charge
return { id, status: charge.status }

Verified in a sandbox.

TestspassType-checkpass
Independent checkInstant rollback
94% confidence

Stay in command

Run in Review and approve every fix, or let Rebar handle the safe ones and ask you about the rest. Reversible fixes can ship on their own; risky ones always wait. One switch stops every system at once.

3.0Control
3.1Per-system autonomy3.2Risky fixes wait3.3Global halt
rebar · control

Autonomy, per system

AutonomousShips reversible, independently-checked fixes on its own.
ReviewHolds every fix for your approval first.

What ships on its own

Instant rollbackShips on its own.
Needs backupAlways waits for you.
Halt all autonomous fixes across every system
One switch

Everything else, handled

Pull requests, not magic

Every fix lands as a normal pull request you can read, review, and revert.

Auto-revert

If a merged fix regresses in production, Rebar rolls it back on its own.

Learns your systems

Rebar remembers how similar breakage was handled before, and reuses what worked.

Dependency updates

Rebar proposes and verifies dependency bumps before they break you.

Full activity log

A plain record of everything Rebar did, when, and under whose authority.

Built for agents

Drive Rebar from your own tools over a CLI, MCP server, and public API.

Stop babysitting production.

Connect your systems and Rebar takes it from there. You approve what you want today, and it earns more every week. The destination is production that runs itself.