fft-host-ipc

name	fft-host-ipc
description	Host IPC ABI for outbound messages, scheduler control, memory/skill actions, subagents, and file delivery. Use when writing JSON into the group IPC directories or when unsure of payload shapes.

FFT Host IPC

The agent talks to the host only through filesystem IPC under the run's IPC directory (see system prompt Workspace section for the path). Write atomically (temp file then rename). Wait for action_results/<requestId>.json with status=success before reporting completion for request/response actions.

When to use this skill

• Sending proactive chat messages or run_progress updates
• Pausing/resuming/cancelling scheduled tasks or registering groups
• memory_search / memory_get / memory_write
• skill_list / skill_view / skill_create / skill_patch / skill_rollback
• Spawning a subagent
• Delivering files/photos back to Telegram

When not to use this skill

• Ordinary file edits in the workspace (use tools directly)
• Reading SOUL/NANO/TODOS/MEMORY (already injected or on disk)
• Coding work that belongs in fft-coder-ops

Messaging (messages/*.json)

Proactive message:

{"type":"message","chatJid":"<jid>","text":"<text>"}

Run progress (no separate chat bubble):

{"type":"run_progress","chatJid":"<jid>","requestId":"<current request_id>","text":"Run status: ...","phase":"thinking|tool_running|stale","detail":"..."}

Scheduler (current_tasks.json + task JSON)

Read current_tasks.json when needed. Control tasks with:

• {"type":"pause_task","taskId":"..."}
• {"type":"resume_task","taskId":"..."}
• {"type":"cancel_task","taskId":"..."}
• Main-only: {"type":"refresh_groups"}
• Main-only: {"type":"register_group","jid":"...","name":"...","folder":"...","trigger":"@AssistantName"}

Task management scheduling is host-owned; prefer host/task surfaces over inventing new schedule formats.

Memory actions (actions/*.json → action_results/<requestId>.json)

{"type":"memory_action","action":"memory_search","requestId":"<id>","params":{"query":"...","topK":8,"sources":"all"}}

{"type":"memory_action","action":"memory_get","requestId":"<id>","params":{"path":"MEMORY.md"}}

{"type":"memory_action","action":"memory_write","requestId":"<id>","params":{"intent":"todo_upsert_task","payload":{"entryId":"T1","text":"...","status":"PENDING"}}}

For writes, wait for status=success before telling the user it stuck.

Skill actions (actions/*.json → action_results/<requestId>.json)

Use skill_list/skill_view before reinventing a workflow. Mutations are host-gated to agent-created runtime skills; repo and personal source skills are read-only.

{"type":"skill_action","action":"skill_list","requestId":"<id>","params":{"includeArchived":false}}

{"type":"skill_action","action":"skill_view","requestId":"<id>","params":{"name":"skill-name"}}

{"type":"skill_action","action":"skill_create","requestId":"<id>","params":{"name":"short-skill-name","description":"When to use...","content":"---\nname: short-skill-name\ndescription: ...\n---\n\n# ..."}}

{"type":"skill_action","action":"skill_patch","requestId":"<id>","params":{"name":"skill-name","content":"complete replacement SKILL.md"}}

{"type":"skill_action","action":"skill_write_file","requestId":"<id>","params":{"name":"skill-name","filePath":"references/example.md","fileContent":"..."}}

{"type":"skill_action","action":"skill_rollback","requestId":"<id>","params":{"name":"skill-name"}}

Subagent (actions/*.json → action_results/<requestId>.json)

{"type":"subagent_action","action":"spawn_subagent","requestId":"<id>","params":{"task":"clear, complete instructions for the subagent","mode":"execute"}}

• mode: "execute" (default, full tools) or "plan" (read-only)
• Poll action_results/<requestId>.json until status=success
• Subagents cannot spawn subagents

File delivery (deliver_files/*.json)

{
  "type": "farm_action",
  "action": "deliver_file",
  "requestId": "<unique-id>",
  "params": {
    "filePath": "path/to/file.jpg",
    "caption": "Optional caption text",
    "kind": "photo"
  }
}

• filePath: absolute or relative to group workspace
• kind: photo | document | video | audio (auto-detected if omitted)
• chatJid: optional; defaults to the group's registered chat
• Confirm action_results/<requestId>.json has status=success before reporting delivered

Guardrails

• Never run destructive git commands unless the operator explicitly requests them.
• Preserve unrelated worktree changes.
• Atomic write only (temp + rename).
• Do not invent new top-level IPC type strings; host kernel freezes the ABI.
• Never claim delivery/mutation success without a success result file.