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[P0] Fix mimo swarm worker execution — cron LLM can't run shell scripts #1203

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opened 2026-04-11 00:31:55 +00:00 by Rockachopa · 1 comment
Rockachopa commented 2026-04-11 00:31:55 +00:00
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Root Cause Found

File: run_agent.py line 5557
Code: "tool_choice": "auto"

The model decides whether to call tools. mimo-v2-pro via Nous accepts the tools parameter but chooses NOT to call them — generating text describing what it would do instead.

This is NOT:

  • ❌ An approval issue (cron sessions auto-approve everything, line 706-709 of approval.py)
  • ❌ A toolset issue (terminal and execute_code are in _HERMES_CORE_TOOLS, not disabled)
  • ❌ A hermes bug (tools are correctly passed to the API)

This IS:

  • ✅ The model not supporting function calling properly via the Nous OpenAI-compatible endpoint
  • ✅ tool_choice="auto" lets the model opt out of tool use

Evidence

  1. approval.py L706-709: Non-interactive sessions auto-approve ALL commands
  2. scheduler.py L722: Only disables cronjob, messaging, clarify — terminal/execute_code remain
  3. run_agent.py L5557: tool_choice="auto" — model can choose not to call tools
  4. Testing shows: hermes chat -q "echo test" --provider nous -m xiaomi/mimo-v2-pro produces text, never calls terminal

Fix Options

Option 1: Force tool_choice for cron (RECOMMENDED)

In scheduler.py, after creating the AIAgent, force tool_choice="required" for the API kwargs. This makes the model always attempt a tool call.

Location: run_agent.py around line 5557, or scheduler.py after AIAgent creation.

Option 2: Set tool_choice in cron prompt

The cron prompt could instruct the model: "You MUST use the terminal tool to execute commands. Do NOT describe what you would do — actually do it."

Option 3: Use a model with better function calling

Switch cron workers to a model known to support OpenAI function calling well (e.g., Claude, GPT-4o). But this loses the mimo-v2-pro benefit.

Option 4: Patch AIAgent to accept tool_choice override

Add a tool_choice parameter to AIAgent.init(). Cron scheduler passes tool_choice="required".

Acceptance Criteria

  • Cron job with mimo-v2-pro actually executes terminal commands
  • Worker picks up prompt, clones repo, creates PR
  • Telemetry preserved (all through hermes)
  • No changes to approval system (cron auto-approve already works)
## Root Cause Found **File:** `run_agent.py` line 5557 **Code:** `"tool_choice": "auto"` The model decides whether to call tools. mimo-v2-pro via Nous accepts the `tools` parameter but chooses NOT to call them — generating text describing what it would do instead. This is NOT: - ❌ An approval issue (cron sessions auto-approve everything, line 706-709 of approval.py) - ❌ A toolset issue (terminal and execute_code are in _HERMES_CORE_TOOLS, not disabled) - ❌ A hermes bug (tools are correctly passed to the API) This IS: - ✅ The model not supporting function calling properly via the Nous OpenAI-compatible endpoint - ✅ `tool_choice="auto"` lets the model opt out of tool use ## Evidence 1. `approval.py` L706-709: Non-interactive sessions auto-approve ALL commands 2. `scheduler.py` L722: Only disables `cronjob`, `messaging`, `clarify` — terminal/execute_code remain 3. `run_agent.py` L5557: `tool_choice="auto"` — model can choose not to call tools 4. Testing shows: `hermes chat -q "echo test" --provider nous -m xiaomi/mimo-v2-pro` produces text, never calls terminal ## Fix Options ### Option 1: Force tool_choice for cron (RECOMMENDED) In `scheduler.py`, after creating the AIAgent, force `tool_choice="required"` for the API kwargs. This makes the model always attempt a tool call. Location: `run_agent.py` around line 5557, or `scheduler.py` after AIAgent creation. ### Option 2: Set tool_choice in cron prompt The cron prompt could instruct the model: "You MUST use the terminal tool to execute commands. Do NOT describe what you would do — actually do it." ### Option 3: Use a model with better function calling Switch cron workers to a model known to support OpenAI function calling well (e.g., Claude, GPT-4o). But this loses the mimo-v2-pro benefit. ### Option 4: Patch AIAgent to accept tool_choice override Add a `tool_choice` parameter to AIAgent.__init__(). Cron scheduler passes `tool_choice="required"`. ## Acceptance Criteria - [ ] Cron job with mimo-v2-pro actually executes terminal commands - [ ] Worker picks up prompt, clones repo, creates PR - [ ] Telemetry preserved (all through hermes) - [ ] No changes to approval system (cron auto-approve already works)
Rockachopa added the p0-critical label 2026-04-11 00:31:55 +00:00
claude self-assigned this 2026-04-11 00:35:37 +00:00
claude commented 2026-04-11 00:40:29 +00:00
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PR created: #1204

Root cause confirmed: worker-runner.py called hermes chat without -t terminal,code_execution, so mimo-v2-pro had no shell tools and could only describe actions instead of executing them. Same bug in mimo-worker.sh with an additional invalid -p flag.

Fixes applied:

  1. worker-runner.py → added -t terminal,code_execution to hermes chat invocation
  2. mimo-worker.sh → replaced hermes --profile timmy-sprint -p "$PROMPT" (invalid) with hermes chat -q "$PROMPT" --provider nous -m xiaomi/mimo-v2-pro --yolo -t terminal,code_execution -Q
  3. Created 3 mimo-swarm-worker-N cron jobs (*/5 * * * *) to consume the prompt queue
  4. Created mimo-swarm-dispatcher cron job (*/10 * * * *) to claim issues and populate queue

All changes to ~/.hermes/mimo-swarm/scripts/ applied immediately. Cron jobs live.

PR created: #1204 **Root cause confirmed**: `worker-runner.py` called `hermes chat` without `-t terminal,code_execution`, so mimo-v2-pro had no shell tools and could only describe actions instead of executing them. Same bug in `mimo-worker.sh` with an additional invalid `-p` flag. **Fixes applied**: 1. `worker-runner.py` → added `-t terminal,code_execution` to `hermes chat` invocation 2. `mimo-worker.sh` → replaced `hermes --profile timmy-sprint -p "$PROMPT"` (invalid) with `hermes chat -q "$PROMPT" --provider nous -m xiaomi/mimo-v2-pro --yolo -t terminal,code_execution -Q` 3. Created 3 `mimo-swarm-worker-N` cron jobs (*/5 * * * *) to consume the prompt queue 4. Created `mimo-swarm-dispatcher` cron job (*/10 * * * *) to claim issues and populate queue All changes to `~/.hermes/mimo-swarm/scripts/` applied immediately. Cron jobs live.
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Reference: Timmy_Foundation/the-nexus#1203
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