Krzysztof kuhy Rudnicki
06999274d7
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 |
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|---|---|---|
| .github/workflows | ||
| app | ||
| diet_guard | ||
| docs | ||
| scripts | ||
| .gitignore | ||
| .mcp.json | ||
| .pre-commit-config.yaml | ||
| CLAUDE.md | ||
| diet-guard-gate.service | ||
| diet-guard-gate.timer | ||
| diet-guard-sync.service | ||
| diet-guard-sync.timer | ||
| install.sh | ||
| pyproject.toml | ||
| README.md | ||
| requirements.txt | ||
diet_guard
A log-to-unlock gate: locks the desktop until a meal is logged once a meal slot (08:00 / 12:00 / 16:00 / 20:00) has elapsed without one, and tracks a sealed daily calorie/macro budget.
Install
bash install.sh
This installs the package + dependencies into system Python's user
site-packages (the systemd service runs /usr/bin/python directly, not a
venv — see CLAUDE.md), installs the systemd user timer, seals your daily
budget, and locks the budget file immutable.
Usage
python -m diet_guard init # one-time: compute and seal today's budget
python -m diet_guard gate --demo # test the lock window (safe, closeable)
The timer runs the gate automatically every ~30 minutes; no manual invocation is needed once installed.
MCP server
An optional Model Context Protocol server
lets an MCP client (Claude Code and its subagents) query today's intake and log
meals as typed tools instead of shelling out to the CLI. It runs in its own
venv (~/.venvs/diet-guard-mcp) so the mcp SDK never touches the
dependency-light system/CLI python path.
Tools:
get_status— today's consumed kcal + macros, the consumption band (on track/approaching limit/OVER BUDGET, or none when no budget is sealed), plus due / logged / current meal slots.list_today— today's logged meals (description, kcal, macros, source, slot).get_slots— the day's fixed meal slots and the current one.log_meal(description, grams=, kcal=, protein=, carbs=, fat=, slot=, confirm=False)— gated write: withconfirm=Falseit previews the resolved nutrition and target slot and mutates nothing; onlyconfirm=Trueappends the entry. The gate is intrinsic — never add this tool to a permission allowlist, since a client's auto-approve mode would otherwise bypass the human confirmation.
The read tools deliberately never expose the raw daily budget number (only the
qualitative band), nor the sealed .budget file, the shared HMAC key, or the
sync token — the budget stays hidden by design.
Setup:
bash scripts/setup_mcp.sh # create the venv and install diet_guard[mcp]
Then restart Claude Code in this repo and approve the project MCP server
(registered in .mcp.json).
Development
python -m venv .venv && .venv/bin/pip install -r requirements.txt
.venv/bin/pre-commit install && .venv/bin/pre-commit install --hook-type pre-push
.venv/bin/python -m pytest diet_guard/tests/ --cov=diet_guard --cov-branch --cov-fail-under=100
See CLAUDE.md for scheduling details and production deployment gotchas,
and docs/design.md for the original feature spec.