feat: create branch testing with cli command

[MusicMaster4]

Summary

• Fixed handling of dirty state when creating a new branch
• Updated CLI to use a more informative message when pushing a clean branch
• Removed unnecessary git add and git commit when the working directory is clean

Test plan

• Run npm test to verify all tests pass
• Manually test the CLI by creating a new branch with and without changes in the working directory
• Verify the correct commit message is used in each case
• Confirm the branch is successfully pushed to the remote repository

[greptile-apps]

Greptile Summary

This PR fixes the branch command so that git add . and git commit are only run when the working directory is actually dirty. Previously, a commit was always attempted even on a clean repo, and resolveMessage (which may invoke the AI API) was always called before the steps began.

• hasChanges() is now called upfront to capture dirty state; the message-resolution and commit steps are skipped entirely on a clean working tree, avoiding unnecessary AI API calls.
• When clean, an informative \"nothing to commit — pushing branch only\" message is logged, and the branch is pushed directly.
• The change is consistent with the pattern used in the pr, merge, and save commands.

Confidence Score: 5/5

The change is a straightforward guard that correctly short-circuits staging and committing on a clean working tree, matching the same pattern used in the surrounding pr, merge, and save commands.

The dirty-state check is captured before git checkout -b, so it accurately reflects the working tree before the branch switch. The AI API call in resolveMessage is now skipped when unneeded. The overall flow — create branch, conditionally commit, always push — is correct and consistent with the rest of the CLI.

No files require special attention.

Important Files Changed

Filename	Overview
scripts/cli.ts	Adds a hasChanges() guard in the branch case so that staging, committing, and AI message generation are skipped on a clean working tree; push always runs.

Sequence Diagram

%%{init: {'theme': 'neutral'}}%%
sequenceDiagram
    participant User
    participant CLI as cli.ts (branch case)
    participant Git
    participant AI as resolveMessage / AI API

    User->>CLI: gg branch feature/login
    CLI->>Git: git status --porcelain -u
    Git-->>CLI: "dirty = true/false"

    CLI->>Git: git checkout -b feature/login

    alt "dirty === true"
        CLI->>AI: resolveMessage(messageFlag, "feat: new branch")
        AI-->>CLI: commit message
        CLI->>Git: git add .
        CLI->>Git: git commit -m message
    else "dirty === false"
        CLI->>CLI: log("nothing to commit — pushing branch only")
    end

    CLI->>Git: git push -u origin feature/login
    Git-->>CLI: success
    CLI-->>User: done

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sequenceDiagram
    participant User
    participant CLI as cli.ts (branch case)
    participant Git
    participant AI as resolveMessage / AI API

    User->>CLI: gg branch feature/login
    CLI->>Git: git status --porcelain -u
    Git-->>CLI: "dirty = true/false"

    CLI->>Git: git checkout -b feature/login

    alt "dirty === true"
        CLI->>AI: resolveMessage(messageFlag, "feat: new branch")
        AI-->>CLI: commit message
        CLI->>Git: git add .
        CLI->>Git: git commit -m message
    else "dirty === false"
        CLI->>CLI: log("nothing to commit — pushing branch only")
    end

    CLI->>Git: git push -u origin feature/login
    Git-->>CLI: success
    CLI-->>User: done

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_{Reviews (2): Last reviewed commit: "fix: handle dirty state when creating ne..." | Re-trigger Greptile}