Holix Subagents

When to use

The user wants background specialized work without blocking the main Holix chat:

• research, coding, review, writing, analysis
• optional: hand off implementation to external coding CLIs (Claude Code, OpenCode, Grok Build) via an assigned coder sub-agent

Use sub-agents only when the user asks to delegate (/subagent-spawn, "запусти субагента", etc.), except site/resource analysis with many real links from fetch_url — then call research_site_pages (it spawns page_analyst workers). Do not auto-spawn other types for regular chat questions.

Prerequisites

1. Enabled (default on): enable_subagents: true in profile config.yaml or HOLIX_ENABLE_SUBAGENTS=true.
2. Profile active: holix --profile <name> … or HOLIX_PROFILE.
3. Limits (profile config.yaml):
   • subagent_max_concurrent (default 4)
   • subagent_process_timeout (seconds per job)
   • subagent_default_process_mode: process (Linux/macOS, isolated) or async (in-process)

If spawn fails with "disabled" → tell user to enable sub-agents and retry.

Built-in types

Custom types: profile subagents/types.json, managed in TUI /subagent-types or listed with /subagent-types list.

Duplicate active jobs get suffixed ids: coder-2, coder-3, …

Two ways to start work

A. Main agent (recommended for natural language)

User asks in chat; you (main agent) use tools:

1. delegate_to_subagent(agent_type, task) → returns job_id
2. Optionally list_subagents to check status
3. wait_subagent_result(job_id) when the answer must be included in your reply
4. terminate_subagent(job_id) to cancel

Task text rules — be explicit in task:

• Goal — one sentence outcome
• Scope — paths, modules, constraints
• Done when — verifiable criteria (tests pass, file exists, N sources cited)
• Don't — forbidden actions if any

Bad: fix tests Good: Fix failing tests in tests/test_auth.py; run pytest tests/test_auth.py; report pass/fail and diff summary

If delegate_to_subagent returns already_running → call wait_subagent_result on that job_id, do not spawn again.

B. Direct slash commands (user or you instruct them)

Works in TUI, Telegram/MAX, and holix chat-command:

/subagent-spawn <type> <task>
/subagents
/subagent-result <job_id>
/subagent-terminate <job_id>
/subagent-types list

CLI chat:

holix chat-command -p <profile>

One-shot via main agent:

holix run "Delegate to researcher: summarize docs/en/SUBAGENTS.md in 5 bullets"

Full lifecycle (monitor → result)

spawn → running → [optional: question / confirmation] → completed | failed | terminated

1. Spawn

• Tool: delegate_to_subagent
• Slash: /subagent-spawn coder Add type hints to cli/commands/chat.py

Note job_id from the response (often equals type, or type-N).

2. Monitor

After /subagent-spawn in chat hosts, completion may auto-push to transcript when the job finishes.

3. Collect result

• Blocking (main agent): wait_subagent_result(job_id)
• Non-blocking (user): /subagent-result <job_id>
• On failure: read error field / log; offer retry with clearer task or terminate + respawn

4. Stop

/subagent-terminate <job_id> or terminate_subagent(job_id)

Questions from sub-agents (ask_user)

Process-mode and async sub-agents can call ask_user. The parent surfaces a SubAgentQuestionEvent.

TUI: a modal opens with the question, optional task/context, and an answer field (queue if several). Status bar shows ❓N while questions wait. Esc dismisses the dialog but keeps the question pending.

❓ coder: Which auth library should I use — JWT or sessions?
Reply: /subagent-reply coder JWT with refresh tokens

How the user answers (all hosts)

Examples:

/subagent-reply coder-2 use PostgreSQL
@coder use PostgreSQL
use PostgreSQL

Your job as main agent when you see a pending question:

1. Show the question clearly to the user (quote job_id).
2. Tell them the three reply options above.
3. When they answer, ensure it routes via /subagent-reply (or plain text if single pending) — do not start a new main-agent turn that ignores the sub-agent.
4. After reply, sub-agent continues; poll with /subagents or wait_subagent_result.

Pending questions appear in /subagents under Pending questions.

Tool confirmations from sub-agents

When a sub-agent hits a risky tool (write_file, terminal, …), the parent shows a confirmation (may include subagent_name).

User approves with slash commands (TUI / chat / messengers):

Until confirmed, the sub-agent waits — remind the user if the job looks stuck at a tool step.

External CLI path (holix launch)

Sub-agents do not auto-launch tmux CLIs. Flow:

holix launch setup  → assign CLI to sub-agent type (e.g. claude → coder)
main agent → delegate_to_subagent(coder, task)
coder sub-agent → external_cli(action=launch|send|output, cli_id=…)

Setup (once per profile)

holix launch setup
# Enable claude → Model slot: coder → Assign to sub-agent: coder

Check assignments:

/launch list

Manual terminal control (user, not sub-agent)

holix launch claude
holix launch attach <tmux_session>
holix launch send <id> "refactor auth module"
holix launch chat <id>    # interactive relay
holix launch <id> output

Delegation example (main agent)

User: "Research API in background; implement refactor in Claude Code"

You:
  delegate_to_subagent(researcher, "…")
  delegate_to_subagent(coder, "Launch claude via external_cli and refactor auth in src/auth/")
  wait_subagent_result(researcher)  # when needed for synthesis

Rules:

• Main agent never has external_cli tool.
• Only sub-agent types with agent_slot binding get external_cli.
• Linux/macOS only for tmux launch.

See profile bindings: ~/.holix/profiles/<profile>/external_clis/.

Decision guide

Do NOT

• Spawn duplicate jobs for the same running task (use wait_subagent_result).
• Crawl a site with dozens of main-agent fetch_url calls, or web_researcher, when research_site_pages fits.
• Run holix launch from main agent tools — delegate to assigned sub-agent.
• Assume holix run handles /subagent-spawn — use chat-command, TUI, or tools.
• Block the user chat while waiting — spawn with wait=False unless they asked to wait.

Quick reference

/subagent-spawn writer Draft README section on sub-agents
/subagents
/subagent-reply writer Use MIT license section from LICENSE
/subagent-result writer
/subagent-terminate writer

holix logs -s subagent
holix chat-command -p default
holix launch list