Backfill test coverage
Point Operator at an untested module and it writes the suite — proration maths, edge cases, zero-day trials — then proves it green. +591 lines, 94% branch coverage.
Use casesWhat teams hand
What teams hand
to Kaer.
Not prompts — tickets. The kind of work that sits in your backlog, fragile or time-consuming, that an operator can own end-to-end: from reading the code to opening the PR.
Six scenarios
Real tickets, owned end-to-end.
Migrate Webpack to Vite
Audit the aliases and env shims, swap the config, fix the dynamic-import chunks, update the CI caches. Cold start drops from 14s to 0.8s — PR #2048 merged.
Wire a Stripe webhook
Scaffold the endpoint, verify the signature, map invoice.paid and charge.failed onto your subscription state — then replay events to confirm it holds.
Triage a flaky suite
Operator reproduces the intermittent failures and names the root causes — a race in useAuth, a locale-bound snapshot, a port collision — then quarantines all three.
Stand up a prototype overnight
Hand over a brief at midnight, wake to a deployed demo — scaffolded app, auth, database schema, streaming UI and smoke tests. Live by 09:00, eight hours elapsed.
Bulk-fix a security advisory
Fourteen packages bumped to clear the advisory — express, semver, path-to-regexp and more — with zero breaking changes and the suite still green.
Six concrete tasks, each run by a Kaer operator on a real codebase. Same operator, different deliverable.
The operator model
You hand it a ticket. It hands you a PR.
Every scenario runs the same loop: Operator reads your codebase, plans the change, writes the code, runs the tests, and opens a pull request. You review the diff, not the process.
- Reads the repo and traces the blast radius before it plans
- Runs in a per-session isolated environment — no shared state between tasks
- No residual access once the job closes
Compatibility
Fits the stack you already have.
Language-agnostic and framework-agnostic. Operator reads your code, follows your conventions, and runs your CI — no migration, no lock-in.
- First-class TypeScript, JavaScript, Python and Go
- Rust, Ruby on Rails, Java and Kotlin supported
- GitHub Actions, CircleCI and GitLab CI
- PostgreSQL, MySQL and SQLite
Your backlog has a ticket like this.
Tell us what it is — we'll show you what Kaer can do with it before you commit to anything.
or see pricing