Per-bottle `git config --global user.name` / `user.email` pair
so the agent's commits inside the bottle land with a known
identity rather than the agent image's default (no user, or
whatever the image dropped in).
Schema:
git_user:
name: "Eric Bauerfeld"
email: "eric+claude@dideric.is"
Either field can be set independently — name-only / email-only
configs are valid and apply just the field that's set. An
explicit `git_user:` block with both fields empty dies at parse
time rather than silently no-op'ing; an omitted block is the
no-op path (default GitUser is empty, provisioner skips).
Parse-time validation:
- Unknown sub-keys die (e.g., typo of `username`).
- Non-string name/email dies.
- Both-empty dies (half-finished edit hint).
11 unit tests in `test_manifest_git_user.py`; 653 unit tests pass.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>