Chunk by CircleCI

Validation that keeps up with your agents

Chunk sidecars run lightweight checks in a clean cloud environment while your agent is still working. Catch failures before the push. Ship cleaner. Move faster.

$ brew install CircleCI-Public/circleci/chunk && chunk init

Get started with Chunk sidecars

Sync local code to a Linux microVM and runs your tests against it
Keep your agent on the rails with hooks and deterministic feedback
Works with Claude Code, Cursor, or any AI agent

New to Chunk? Learn more or share feedback on Discord.

> chunk validate

Using sidecar for remote commands

Synchronising local CircleCI-Public/chunk-cli to remote: /home/user/chunk-cli...

✓ Synced

Running test (remote): task test

✓ internal/anthropic (cached)

✓ internal/config (cached)

ø internal/envspec

✓ acceptance (17.511s)

DONE 975 tests, 2 skipped in 19.078s

Install the Chunk CLI

brew install CircleCI-Public/circleci/chunk

Initialize and authenticate

chunk init

chunk auth set circleci

Run in your agent

/chunk-sidecar

Sidecar usage is currently free. We'll let you know before we start charging.

AI powered

AI infra for agentic development

AI generates complex code fast. Validation needs to keep pace. Chunk sidecars catch failures before the push, so CI stays clean for the integration and release work that follows.

Inner loop validation

Chunk sidecars run alongside agents before any commit or push. Auto-detects your stack, fires validation hooks when the agent pauses, and returns 30x faster than your CI pipeline.

Outer loop automation

Chunk Tasks monitors, troubleshoots, and optimizes your CI pipelines autonomously. Resolves failures, reduces flaky tests, and keeps delivery moving without slowing your agents down.

Compounding efficiency

Validation that catches issues early means fewer retries, less rework, and less unnecessary context fed back to the agent. 5x fewer tokens spent. 30x more compute efficient than a full pipeline run.

> Chunk sidecars are available now

Free on every CircleCI plan. Sign up, install the chunk CLI, and one command sets up your environment, wires agent hooks, and gets validation running in under five minutes.

$ brew install CircleCI-Public/circleci/chunk && chunk init