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Features Mar 20, 2026 7 min read

Background Agents: Parallel AI Work Without Interruptions

Stop waiting for the AI to finish before you continue coding. CodeGrex runs autonomous tasks in isolated worktrees and brings back clean, reviewable diffs when done.

Background Agents are designed for real-world dev velocity: you keep momentum on your current task while AI handles refactors, test generation, migrations, and bug fixes in parallel.

Isolated Git Worktrees

Each job runs in its own branch and filesystem context, so edits never interfere with what you are actively writing.

Autonomous Task Execution

Agents can inspect files, update code across modules, run scripts, and iterate until acceptance criteria are met.

Built-in Verification

Agents run test and build commands in their branch and include output notes with the final diff to speed up review.

Parallel Multi-Agent Runs

For larger initiatives, split work into multiple agents targeting separate domains and merge outcomes progressively.

Typical workflow

  1. Open Agent Chat and describe the task with clear expected outputs.
  2. Select `Background` execution mode.
  3. Continue your primary work while the agent runs in parallel.
  4. Review the generated diff and test results, then merge.

Best for: refactors, repetitive updates, dependency migrations, and broad test scaffolding.