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+---
+id: cb5e8814-f689-4de0-8854-823358706dec
+type: solution
+title: "Claude Scheduled Tasks: headless Claude Code on systemd timers"
+tags: [claude-scheduled, systemd, automation, headless, claude-code, homelab, solution]
+importance: 0.9
+confidence: 0.8
+created: "2026-03-01T06:20:55.075783+00:00"
+updated: "2026-03-01T06:20:55.075783+00:00"
+---
+
+# Claude Scheduled Tasks System
+
+## Summary
+Built a "Claude Cowork"-style scheduled task system using systemd timers and `claude -p` headless mode. Allows fully autonomous Claude Code sessions to run on a schedule without human interaction.
+
+## Architecture
+
+- **Universal runner:** `~/.config/claude-scheduled/runner.sh`
+- **Per-task config directory:** `~/.config/claude-scheduled/tasks/<name>/`
+  - `prompt.md` — task instructions
+  - `settings.json` — model, budget, allowed tools
+  - `mcp.json` — MCP server config for that task
+- **Systemd template unit:** `claude-scheduled@.service`
+- **Per-task timer files:** `claude-scheduled@<name>.timer`
+
+## Key invocation flags
+```
+claude -p \
+  --model sonnet \
+  --max-budget-usd 0.75 \
+  --output-format json \
+  --no-session-persistence \
+  --allowedTools <list> \
+  --mcp-config <file> \
+  --strict-mcp-config \
+  --append-system-prompt <context>
+```
+
+## Critical notes
+- Must `unset CLAUDECODE` before invoking `claude -p` inside any shell that may be a Claude session (nested session error otherwise)
+- `--permission-mode bypassPermissions` cannot be used as root — run as non-root user
+- `--max-budget-usd` is not an instant cutoff — can overshoot (set $0.25, spent $0.37)
+- Results stored to cognitive-memory as workflow+episode
+- Log rotation: keeps 30 logs per task in `~/.config/claude-scheduled/tasks/<name>/logs/`
+- Global kill switch: create `~/.config/claude-scheduled/disabled` file to halt all tasks
+
+## Gitea issue
+claude-home#2