- 01Publish a migration guideHope every customer sees it.
- 02Wait for support ticketsDiscover affected code after it breaks.
- 03Repeat the same migrationExplain it repository by repository.
- 04Keep old versions aliveBecause customers remain behind.
Private pilot
Now onboarding API teams
Your APIs change.
Your APIs change.
Customer code keeps up.
Unison detects breaking API changes, finds every affected customer repository, generates the migration, runs the tests, and opens a verified pull request.
- GitHub-native
- Sandbox verified
- Humans only on exceptions
Migration control plane
Monitoring
Provider eventBreaking change detected
2 min ago
openai/openai-openapiPOST /responses request updated
Breaking
Affected repositories12
PR ready8
Verifying3
Needs review1
RepositoryMigrationStatus
Aatlas/backend
+4−4
PR ready
Nnorthstar/api
+7−5
Testing
Llinear/worker
+3−3
PR ready
Source analyzedOpenAPI + SDK + docs
✓
Isolated verification148 tests passed
01DetectAuthoritative provider changes
02TargetOnly affected repositories
03MigrateCodebase-specific patches
04VerifyTests in isolated containers
05DeliverTracked GitHub pull requests
The missing layer
A changelog doesn’t update
A changelog doesn’t update
your customer’s code.
API providers ship the change. Customers inherit the migration. Unison closes the gap between the two.
- ✓Changes detected automaticallyFrom specifications, SDKs, and documentation.
- ✓Impact mapped across customersOnly relevant repositories enter the pipeline.
- ✓Each codebase migrated safelyAI edits grounded in exact provider evidence.
- ✓Verified PRs arrive on GitHubHumans review exceptions, not routine work.
From release to pull request
One change. Every customer.
One change. Every customer.
Handled.
Connect once, then let Unison own the repetitive work of keeping integrations current.
APIv2.4
Detect the change
Unison watches authoritative API specifications, SDK releases, and documentation for meaningful changes.
Find affected code
A provider-to-repository dependency graph identifies the exact customers, files, and call sites that need attention.
− prompt: message
+ input: message
Generate the migration
AI derives a scoped patch using the provider change and the customer repository’s real code context.
TestsPassed
Verify and deliver
Baseline and patched tests run in isolation before Unison opens a draft PR and monitors CI.
Beyond a coding agent
The AI writes code.
The AI writes code.
Unison owns the outcome.
Claude and Codex can perform an edit after someone identifies the problem and supplies the context. Unison continuously operates the entire migration lifecycle across companies.
Talk to us about your API →Manual coding agentUnison
Detects provider releasesManual promptAutomatic
Maps impact across customersRepository by repositoryFleet-wide
Builds migration contextDeveloper suppliedEvidence grounded
Runs and tracks verificationManually coordinatedPolicy controlled
Handles stale or duplicate workDeveloper managedBuilt in
Safety by architecture
Automation that earns access to your code.
Unison is designed to fail closed. Every migration is scoped, reproducible, and reviewable before it reaches a customer repository.
GitHub-controlled access
Customers choose exactly which repositories the GitHub App can access and can revoke access at any time.
Isolated verification
Tests execute in pinned, network-disabled containers without exposing the host or unrelated secrets.
Evidence-bound patches
Generated edits are constrained to files and code ranges justified by the detected provider change.
Reviewable by default
Verified migrations open as draft pull requests. Ambiguity, failed tests, and failed CI escalate to a human.
Early access
Join the Unison waitlist.
Get product updates and an invitation when we open early access to more API teams.