Arden
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Ship changes without breaking anyone.

Arden finds every service that depends on your change, opens tested pull requests in each one, and sequences the rollout so nothing breaks in production.

Get early accessSee how it works
users-api·Rename userId → user_id
−userId: string
+user_id: string

The problem

One team's change breaks everyone else.

You don't know who depends on you.

Consumers hide behind HTTP calls, event schemas, and shared libraries. There's no registry, no contract, no reliable list.

Breaks show up in production.

Services deploy independently. The type checker can't catch cross-service breaks. You find out when dashboards go red.

Migrations take months.

Slack threads, spreadsheets, and stragglers on the old version. Nobody knows which services have actually migrated.

Coding agents made writing the fix cheap. Knowing what breaks — and coordinating the change across teams — is still manual.

How it works — the provider

Open a PR. See your blast radius.

  • Finds consumers through code analysis and live traffic — nothing hides behind an abstraction.
  • Detects behavior changes, not just type changes: field renames, unit conversions, schema evolution.
  • Makes your PR backward-compatible so the provider team can merge today without blocking consumers.

How it works — the consumer

Consumers get a PR, not a Slack thread.

  • Explains the change in plain language alongside the exact diff — why it changed, not just what.
  • Flags uncertainty instead of hiding it: edge cases, dynamic access patterns, and ambiguous call sites are surfaced for human review.
  • Reply in PR comments to refine the fix; Arden re-runs and updates the branch.

Safe rollout

Expand. Migrate. Contract. Automatically.

The old field is removed only after every consumer has migrated and deployed. Traffic signals confirm readiness — Arden doesn't guess.

01✓ Done

Expand

Ship both the old field and the new one. Every existing consumer keeps working with zero changes.

Deployed

02Active

Migrate

Consumer PRs merge one by one. Old-field traffic drains as each service deploys.

8 / 11 services

03🔒

Contract

Remove the old field once every consumer has migrated and traffic reaches zero.

Unlocks when traffic = 0 for 24h

Campaign progress

CampaignCharge.amount → amount_minor
Migrate8/11 services · 73%
Old-field traffic2.1M → 140K / day ↓
Contract unlockswhen traffic = 0 for 24h

Built for safe rollouts

Enterprise-ready from day one.

Read-only by default

No write access unless you explicitly grant it per repository.

Per-repo write access

Granular permissions scoped to individual repos. Arden only writes where you authorize.

Sandboxes with no secrets

Code analysis runs in isolated environments. Production credentials never enter the sandbox.

Full audit trail

Every action logged with context: what changed, which campaign, who approved it.

Bring your own model

Use your own OpenAI, Anthropic, or Azure endpoint. We never store your API keys.

Your code is never used for training

We don't retain code, diffs, or prompts for model improvement.

Run in your own cloud

Roadmap

Self-host the Arden runner inside your VPC for complete data isolation.

Stop coordinating breaking changes by hand.

Request early access — we'll reach out to set up a call.

Or email team@arden.sh

Works with GitHub