feat: spawn_elfs batch tool for guaranteed parallel elf execution
New spawn_elfs tool takes array of tasks, spawns all elfs simultaneously.
Solves the problem of models (Mistral Small, Devstral) that serialize
tool calls instead of batching them.
Schema: {"tasks": [{"prompt": "...", "task_type": "..."}], "max_turns": 30}
Also:
- Suppress spawn_elfs tool output from chat (tree handles display)
- Update M7 milestones to reflect completed deliverables
- Add CC-inspired features to M8/M10: task notification system,
task framework, /batch skill, coordinator mode, StreamingToolExecutor,
git worktree isolation
vikingowl
ace9b5f273