Migrations are well-defined. They just take forever.
Every engineering team has a list of migrations that should have happened last quarter. Upgrade the framework. Replace the deprecated library. Refactor the legacy module. The pattern is known. The work is repetitive. The problem is that nobody has weeks to grind through it.
Large-scale migrations involve hundreds of files. Each change needs to be verified against the test suite. Each PR needs to be reviewed. The scope is massive, but the work per file is mechanical, exactly the kind of task agents are built for.
Tembo agents apply an approved pattern across your entire codebase, verify every change with tests and builds, and produce reviewable PRs. One approved pattern can generate 100+ PRs, each one tested and ready for review.
Define the pattern. Agents apply it everywhere.
- 1
Start with one dependency upgrade
Name the dependency and target version, provide the repository instructions, and define the checks. Start with a bounded change your team can review.
- 2
Agents fan out across the codebase
The agent updates the dependency, lockfile, and affected code in an isolated environment with your repository and tools.
- 3
Run checks and address failures
Ask the agent to run your test suite and build, investigate failures, and include the output with the diff. Tests provide review evidence; your team decides whether the change is ready.
- 4
Review and merge at your pace
PRs are opened for review. Your team reviews them like any other PR: batch merge the clean ones, dig deeper on the ones that need attention. Ship at your pace.
The work that has been deferred for quarters.
Framework upgrades
React 17 to 18, Rails 6 to 7, Next.js 13 to 14. Upgrade major versions across your entire codebase.
Library replacements
Replace Moment.js with date-fns, jQuery with vanilla JS, or any deprecated library with its modern alternative.
API migrations
REST to GraphQL, Webpack to Vite, class components to hooks. Change the patterns across every consumer.
Language upgrades
Python 2 to 3, TypeScript strict mode, ES5 to ES2022. Modernize your language usage consistently.
Large-scale refactors
Rename patterns, restructure directories, extract shared modules, consolidate duplicated logic.
Tech debt cleanup
Remove dead code, update deprecated APIs, fix warnings, modernize test patterns. Years of backlog cleared.
7 years of tech debt. Cleaned up.
Tilt defined a single migration pattern, approved the first PR, and Tembo agents applied it across their codebase. ~120 PRs were generated, tested, and opened for review.
Legacy patterns, deprecated APIs, outdated conventions: the kind of work that gets deferred every sprint. Agents ground through it methodically while the team focused on product work.
“You just fire it off in the cloud and it handles everything. We defined the pattern once, approved the first PR, and it just kept going. ~120 PRs later, 7 years of tech debt was cleaned up.”
Pick the use case that matters most to your team
Bug fixing & incident triage
Sentry alert comes in. Fix PR goes out. Humans review. Ali at Integral came into the office to find 12 Tembo PRs waiting. He closed 3 Sentry issues in under 5 minutes.
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Automated code review
Every PR reviewed in a real environment. Agents check out the code, run tests and builds, catch visual regressions, and leave actionable comments, not just lint passes.
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