Expose diet_guard's read surface and one gated write action as typed MCP
tools (diet_guard._mcp) so Claude Code and its subagents can query today's
intake and -- with explicit confirmation -- log a meal without shelling out
to the interactive gate CLI.
- _mcp.py: FastMCP stdio server. Read tools get_status, list_today,
get_slots expose today's CONSUMED kcal/macros and the qualitative
consumption band only -- never the raw daily budget, remaining number,
body weight, or protein target (those would back out the deliberately
hidden budget). Gated write log_meal previews unless confirm=True and
degrades gracefully on write failure. Nutrition is grouped into a Macros
model (kcal + optional protein/carbs/fat) to keep the tool under the
arg-count limits with no lint suppression, mirroring the CLI's grouping.
Logs to stderr; no secret (HMAC key / sync token) is ever returned.
- .mcp.json + scripts/setup_mcp.sh: registration via a dedicated
~/.venvs/diet-guard-mcp interpreter; mcp is an optional-dep, kept out of
the systemd/CLI system-python path.
- 100% coverage of the new module; verified end-to-end over stdio.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LQGQj8Ne6TriBExv91nG8v
