Isolated Coding Example

Demonstrates CodingEnsemble.runIsolated() which runs a coding agent in a git worktree, keeping changes isolated from the main working tree.

---

What It Does

1. Accepts a git repository root as a command-line argument
2. Creates an isolated git worktree (branch from HEAD)
3. Runs a feature-implementation task inside the worktree
4. Preserves the worktree on success so you can review and merge

Code

ChatModel model = OpenAiChatModel.builder()
    .apiKey(System.getenv("OPENAI_API_KEY"))
    .modelName("gpt-4o")
    .build();

EnsembleOutput output = CodingEnsemble.runIsolated(
    model,
    Path.of("/path/to/git/repo"),
    CodingTask.implement("Add a README.md file with a project overview"));

System.out.println(output.getRaw());

Running

export OPENAI_API_KEY=sk-...
./gradlew :agentensemble-examples:runIsolatedCoding --args="/path/to/git/repo"

The argument must be the root of a git repository.

How Isolation Works

runIsolated() uses the agentensemble-workspace module to:

1. Create a worktree: git worktree add -b agent-<uuid> .agentensemble/workspaces/agent-<uuid> HEAD
2. Scope tools: All coding tools operate inside the worktree directory
3. Run the ensemble: The agent reads, edits, and tests code in the worktree
4. Preserve on success: The worktree stays so you can cd into it, review changes, and merge
5. Clean up on failure: If the agent fails, the worktree is removed automatically

After a successful run, you can merge the changes:

cd /path/to/repo
git merge agent-a1b2c3d4

Or cherry-pick specific commits from the worktree branch.

See Also

• Coding Agents Guide
• Workspace Isolation Guide
• Coding Agent Example