Partially addresses #185.
`mempalace init <dir>` writes `mempalace.yaml` and `entities.json` into
the project root. When <dir> is a git repository, those files have no
default protection and risk being committed by accident — the loudest
concern in the original report.
This PR adds `_ensure_mempalace_files_gitignored()` which runs at the
end of cmd_init: if <dir>/.git exists, append the two filenames to
.gitignore (creating it if necessary) under a clearly-marked block.
The helper is conservative:
- only runs when <dir>/.git is present (no-op for non-git projects)
- skips entries already present (no duplicates)
- preserves existing .gitignore content
- handles files without trailing newlines
This does NOT relocate the files to ~/.mempalace/wings/<wing>/ as the
issue's 'Expected' section proposes — that's a behavioral change with
miner/config implications and warrants a separate design discussion.
The gitignore safeguard removes the immediate risk without breaking any
existing flow.
Tests: 5 cases in tests/test_init_gitignore_protection.py covering
no-op, fresh creation, partial append, idempotency, and missing-newline
edge case.
Arnold Wender