Summary

Cron jobs using MiniMax provider (MiniMax-M2.7) crash with a streaming-related AttributeError during tool-call delta processing. The agent loop terminates immediately after the first tool call, producing no output.

Error: AttributeError: 'dict' object has no attribute 'model_dump' Location: run_agent.py streaming delta handler, 3 distinct call sites Status: Recurring — confirmed on 2026-04-27 and 2026-05-05 (both cron jobs failed within the same 8 AM window on 5/05)

Environment

Affected Code Locations

Location 1 — run_agent.py:6960–6962 (streaming delta path)

extra = getattr(tc_delta, "extra_content", None)
if extra is None and hasattr(tc_delta, "model_extra"):
    extra = (tc_delta.model_extra or {}).get("extra_content")
if extra is not None:
    if hasattr(extra, "model_dump"):   # ← line 6960
        extra = extra.model_dump()      # ← line 6961  ← CRASH HERE
    entry["extra_content"] = extra

Location 2 — run_agent.py:8809–8811 (non-streaming tool-call path)

extra = getattr(tool_call, "extra_content", None)
if extra is not None:
    if hasattr(extra, "model_dump"):   # ← line 8809
        extra = extra.model_dump()      # ← line 8810  ← CRASH HERE
    tc_dict["extra_content"] = extra

Location 3 — run_agent.py:8748 (reasoning_details preservation)

elif hasattr(d, "model_dump"):   # ← line 8748
    preserved.append(d.model_dump())

Root Cause Analysis

The pattern at all three locations:

if hasattr(extra, "model_dump"):
    extra = extra.model_dump()

Expected type of extra: Pydantic BaseModel instance (has model_dump() method). Actual type when crash occurs: plain dict.

The hasattr guard should theoretically prevent this — hasattr({}, "model_dump") returns False. But the error message is unambiguous.

Two hypotheses:

A) MiniMax's streaming SDK returns tc_delta.extra_content as a Pydantic model that passes hasattr but fails on .model_dump() due to validation issues with streaming data. This would be a MiniMax SDK bug.

B) A dict subclass defines model_dump as a non-callable attribute, causing hasattr to return True but the call to raise TypeError. However the actual error is AttributeError, pointing back to hypothesis A.

The inconsistency

The sibling file agent/transports/chat_completions.py:452–456 uses the safe pattern with try/except:

if hasattr(extra, "model_dump"):
    try:
        extra = extra.model_dump()
    except Exception:
        pass       # ← graceful fallback, no crash

Locations 1 and 2 in run_agent.py lack this protective try/except, making them crash where chat_completions.py would silently continue.

Reproduction Steps

1. Set up a cron job that uses a skill with provider=minimax and model=MiniMax-M2.7.
2. Schedule it to run when MiniMax API is active.
3. The job starts normally, loads skills, and makes the first tool call.
4. On the streaming response containing the tool-call delta, run_agent.py attempts the hasattr(extra, "model_dump") check at line ~6960.
5. Crash: AttributeError: 'dict' object has no attribute 'model_dump'.
6. The framework retries 3 times, then fails with max_retries_exhausted.
7. Session ends with only 1–3 messages (immediate death after first tool call).

Evidence

Session data — 2026-05-05 08:00 (scheduled run)

Session: session_cron_e6a6121db141_20260505_080016.json
Error:   {'type': 'AttributeError', 'message': "'dict' object has no attribute 'model_dump'"}
Reason:  max_retries_exhausted

Session data — 2026-05-05 08:55 (manual re-run)

Session: session_cron_e6a6121db141_20260505_085558.json
Messages: 1 (session started → crashed immediately)

Prior occurrence — 2026-04-27

Same error, same run_agent.py locations, same MiniMax-M2.7 model. See session 20260427_080233_31e0eb77.

Impact

• Both daily cron jobs fail every morning when this bug is active.
• The session dies before producing any output — no music, no video, no Telegram delivery.
• This is a deterministic crash with MiniMax provider, not an occasional glitch.

Suggested Fix

Wrap all model_dump() calls with try/except, consistent with the existing safe pattern in chat_completions.py:

# BEFORE (crashes)
if hasattr(extra, "model_dump"):
    extra = extra.model_dump()

# AFTER (safe)
if hasattr(extra, "model_dump"):
    try:
        extra = extra.model_dump()
    except Exception:
        pass  # extra is already a plain dict or invalid — leave it as-is

Apply the same pattern to all three locations.

Deeper fix option: Investigate why tc_delta.extra_content arrives as a plain dict in the first place. If MiniMax's streaming SDK returns incorrectly-typed objects, the root cause fix would be in the SDK adapter layer.

Files

• run_agent.py — lines 6960, 8748, 8809
• agent/transports/chat_completions.py — lines 452–456 (reference: correct safe pattern)