Delta Code
AI migration review botGPT-4o

The AI review bot
for breaking API changes.

Delta Code watches official provider changes, finds the code they affect, uses GPT-4o to write and review the migration, verifies the exact patch, and opens a draft pull request for your team.

Connect GitHub Open the review inbox
✓ Official-source provenance✓ Verified before PR✓ Human-controlled merge
Provider change detected
✦ AI review complete
acme/checkoutDraft PR #184
DELTA CODE BOT · 2 MINUTES AGO

Migrate checkout requests to PaymentMethod

Stripe API 2026-08-01 removes the legacy source field.

01
Provider change verifiedOfficial migration guide · artifact captured
verified
02
3 affected call sites foundsrc/billing/checkout.ts · tests/checkout.test.ts
mapped
03
Patch and tests generatedBounded repository context · strict structured output
GPT-4o
04
14 verification checks passedlint · type-check · unit tests · sandbox destroyed
passed
Msrc/billing/checkout.ts+12 −8Atests/payment-method.test.ts+34
Ready for developer review
Built for the code review loop
OPENAIGITHUBOPENAPIPYTHON + TSSANDBOXED
A new category of dependency automation

Dependabot finds version bumps.
Delta Code ships API migrations.

External APIs change outside your dependency graph. Delta Code connects the provider announcement to the exact repository, call sites, patch, tests, verification evidence, and draft PR.

See the complete product →
Officialsource provenanceRepository-specificimpact and patchesVerifiedbefore developer review
From provider change to pull request

One bot. The complete migration review loop.

Every step leaves an inspectable artifact, so the final recommendation can be reviewed instead of merely trusted.

01⌁

Watch the source

Capture official specs, releases, guides, and SDK changes with immutable provenance.

provider.change
02◎

Trace impact

Map the change to dependencies, symbols, and concrete call sites in connected repositories.

3 call sites
03✦

Generate with AI

GPT-4o proposes a minimal migration and tests from bounded repository context.

strict JSON
04✓

Verify the patch

Run allowed commands in an isolated sandbox and preserve every check result.

14 / 14 passed
05↗

Open a draft PR

Publish the exact verified patch, evidence, uncertainty, and review recommendation.

human decision
AI with an evidence boundary

Give the model judgment.
Keep proof deterministic.

GPT-4o interprets provider material, understands repository context, writes the patch and tests, and reviews its work. Delta Code independently owns source hashes, call-site evidence, patch policy, sandbox checks, and Git state.

AIPlans, patches, tests, and review explanations✓Provenance, execution, checks, and exact Git artifacts
AI REVIEW TRACEgpt-4o
  1. contextprovider + repository + call sitesbounded
  2. proposalplan + patch + testsvalidated
  3. sandboxlint + typecheck + testpassed
  4. reviewevidence-grounded recommendationapprove
tools disabledstore: falsebudget limited
The next API migration can arrive as a PR

Let the bot do the migration.
Keep the decision yours.

Connect GitHub and turn provider changes into verified, reviewable work before they become emergency upgrades.