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screen-locker/README.md
Krzysztof kuhy Rudnicki 494cc74bb5
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Add read-only MCP server exposing workout/lock status 
Expose the screen-locker's compliance and lock-decision state as read-only
MCP tools (screen_locker._mcp) so Claude Code and its subagents can query
workout status without shelling out to the CLI or opening the Tk window.

- _mcp.py: FastMCP stdio server. Read-only tools get_status, get_summary,
  explain_lock, get_flags. Import leaf over stdout-free status functions
  (gather_status, format_summary_line, explain_lock_decision, predicates);
  logs to stderr. NO write/action tools by design — workouts are logged only
  from RunnerUp-verified TCX data, never from a caller's claim. No tool
  exposes the sync token or any HMAC key.
- .mcp.json + scripts/setup_mcp.sh: registration via a dedicated
  ~/.venvs/screen-locker-mcp interpreter; mcp is an optional-dep.
- 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
2026-07-10 21:28:09 +02:00

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screen-locker

Tkinter/systemd screen locker with workout tracking, sick-day management, and wake-alarm integration. It enforces a workout cadence by locking the screen until a RunnerUp-verified (or explicitly justified) workout is logged.

MCP server (Claude Code integration)

screen-locker exposes a read-only MCP server (screen_locker._mcp) so Claude Code and its subagents can query workout compliance and the lock-decision state through typed tools — without shelling out to the screen-locker-status CLI or opening the Tk window.

  • Read-only tools: get_status (full status snapshot), get_summary (one-line i3blocks summary + ok/warn/lock state word), explain_lock (why the screen is / isn't locked right now), get_flags (the individual boolean lock-decision predicates for today).
  • There are no write/action tools, by design. Nothing here logs a workout or mutates state — workouts are logged only from RunnerUp-verified TCX data, never from a caller's claim. No tool exposes the sync token or any HMAC key.

The mcp SDK is an optional dependency (pip install -e '.[mcp]'), kept out of the CLI/systemd system-python path. One-time setup of the dedicated venv that Claude Code spawns:

./scripts/setup_mcp.sh

Registration lives in the checked-in .mcp.json (project scope). Restart Claude Code in this repo and approve the project MCP-server prompt for it to load. Verify with claude mcp list.