Code review assistant

You’ll build an agent that reviews new pull requests, runs checks in a sandboxed workspace, and posts feedback back to the PR.

The plan

Create the review agent
Connect your code host
Enable a sandboxed terminal
Trigger on new pull requests

Step 1 — Create the agent

Create an agent in Agents. In System instructions, define what to look for: correctness, security, style, and missing tests, with concise, line-referenced feedback.

Step 2 — Connect your code host

Connect GitHub or your code host via the Composio app library or an MCP server, and enable it on the agent in Integrations so it can read diffs and post comments.

Step 3 — Enable a sandboxed terminal

Turn on workspace execution and terminal access in the Capabilities tab so the agent can run linters and tests in an isolated environment. Keep scope tight.

Step 4 — Trigger on PRs

Add a trigger so the review runs automatically when a pull request opens. Test from the builder preview before enabling on a live repo.