[FEATURE]: Add configurable timeout parameter to the Task tool

[jdocker8]

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

The Task tool (used to dispatch subagents like explore and general) has no timeout parameter. Subagents can hang for 5–15+ minutes on tasks that should complete in 15–30 seconds, blocking the entire conversation with no way for the caller to recover programmatically.

The Bash tool already supports an optional timeout parameter (in milliseconds). The Task tool should have the same capability.

Proposed changes:

1. Add an optional timeout parameter to the Task tool schema (milliseconds, consistent with Bash tool).
2. Set a reasonable default timeout (e.g., 120,000 ms / 2 minutes) when none is specified.
3. On timeout, return a structured timeout error so the calling agent can fall back — retry with a smaller scope, do the work directly, or inform the user.

Why this matters:

• There is currently no workaround. The caller agent waits indefinitely and the user must manually abort.
• Codebases with AI rules (e.g., "set explicit timeout per request," "never wait indefinitely") cannot enforce those rules on Task tool calls because the parameter doesn't exist.
• This is distinct from the async/non-blocking dispatch request in Feature Request: Async Task Management - Non-blocking Subagent Dispatch #15069. That issue proposes a fundamentally different execution model. This request is narrower: just add a timeout so synchronous Task calls don't hang forever.

Note: Supersedes #15072, which was not created using the required feature request template.

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• Task Tool Timeouts & Early Termination in Multi-Agent Conductor Pattern #6792: Task Tool Timeouts & Early Termination in Multi-Agent Conductor Pattern (open, covers similar ground on timeouts for the Task tool)
• Task tool needs configurable timeout to prevent indefinite hangs #15072: Task tool needs configurable timeout to prevent indefinite hangs (closed — the issue you already reference as superseded)

[jdocker8]

Between this issue and the repeated summaries issue I opened #13838 there's a significant amount of time lost. I suggest tickets like these be given a higher priority since having issues like these so drastically reduce the usability and productivity with opencode. The difference between opencode and Codex (not the model but the cli/gui) in speed of completing work is drastically in Codex favor.