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CC GUI can read the current workspace Git diff, generate a commit message, and write it into the VS Code Source Control input when possible. Generate button in Source Control

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Check these first

  1. The workspace is a Git repo and has uncommitted changes
  2. Settings → General → Behavior → AI-generated commit messages is on
  3. Settings → Commit AI already has a working provider and model
If you turn the master switch off, the command says the feature is disabled.

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Generate one commit message

1

Open Source Control

Confirm the change list has files. With no diff, the command reports No changes found.
2

Click the generate button

Click the CC GUI generate button in the Source Control title bar, or run CC GUI: Generate Commit Message with Claude from the Command Palette.
3

Wait for it to write back

VS Code shows progress. While it generates, some text may stream into the commit input first.
On success, the input contains a cleaned-up commit message. If it cannot write into the SCM input, the text falls back to the CC GUI input box so you can copy it. On failure, the extension drops the full prompt into the chat and explains why.

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Configure Commit AI

Open Settings → Commit AI:
  • Choose a provider and model (Claude Code or Codex)
  • Edit the global prompt
  • Override the prompt per workspace
  • Turn on the related code-review option if you need it
In the prompt you can lock the language, require a title format, or require a body.
Commit AI sends the diff to the selected model. Very large diffs are truncated. For a sensitive repo, review the prompt and provider first.

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Common issues