agent: repetitive tool call loop blocks task completion #56825

Summary

Agent enters a repetitive tool call loop (over-fetching) when executing complex tasks: it runs the same query multiple times without synthesizing the answer or advancing toward the objective, even when it already has sufficient information. The user needs to explicitly interrupt with commands like "Stop and answer now" to force synthesis.

Environment

• opencode version: 2.0.32
• OS: Linux 7.0.0-38-generic (linux x64)
• Terminal: Unavailable: terminal environment variables are not set
• Shell: /bin/bash
• Install/channel: latest
• Active plugins: None found

Reproduction

1. Send a complex prompt with multiple tasks (e.g., "Make the commit and resolve the GAPs")
2. The agent executes a tool (e.g., git log --oneline -5)
3. Instead of synthesizing the answer, the agent repeats the same tool call indefinitely
4. The loop is only interrupted when the user sends an explicit stop command

Expected Behavior

The agent should:

• Stop fetching information as soon as it has sufficient data for a factual answer
• Synthesize and answer objectively without repeating queries
• Recognize signs of user impatience and adjust behavior immediately

Actual Behavior

The agent enters an infinite loop of identical tool calls, repeating the same query (e.g., git log --oneline -5) dozens of times without advancing toward the objective or responding to the user. There is no automatic stop mechanism when sufficient information has been collected.

Additional Context

• Frequency: Occurs "very frequently" in complex tasks
• Affected models: qwen3.6:35b-a3b (default) and qwen3-coder-next:latest — the problem is not specific to one model, it occurs with both
• Workaround: User needs to explicitly interrupt with commands like:
  • "Stop and answer now"
  • "Answer objectively with what you have"
  • "Just answer, no more searches"
• Impact: Seriously compromises the workflow; tasks that should be resolved in minutes extend indefinitely
• Typical scenario: Tasks involving multiple steps (commits, tests, validations) where the agent needs to collect information before answering