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[PR #13586] feat(acp): stream bash tool output during execution #14724

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opened 2026-02-16 18:19:29 -05:00 by yindo · 0 comments
yindo commented 2026-02-16 18:19:29 -05:00
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Original Pull Request: https://github.com/anomalyco/opencode/pull/13586

State: closed
Merged: No

Summary

Streams partial bash output through ACP during tool execution, enabling real-time feedback in chat bridges and other ACP clients.

Fixes #5024

Changes

In packages/opencode/src/acp/agent.ts, added rawOutput to the "running" status update:

case "running":
  await this.connection.sessionUpdate({
    sessionId,
    update: {
      sessionUpdate: "tool_call_update",
      toolCallId: part.callID,
      status: "in_progress",
      kind: toToolKind(part.tool),
      title: part.state.title || part.tool,
      locations: toLocations(part.tool, part.state.input),
      rawInput: part.state.input,
      // NEW: Stream partial output during execution
      rawOutput: part.state.metadata?.output
        ? { output: part.state.metadata.output }
        : undefined,
    },
  })

Background

The bash tool already updates ctx.metadata() with stdout on each chunk (line 179 in bash.ts), but this metadata was not being forwarded through ACP during the "running" state. Only "completed" and "error" states included rawOutput.

This small change (5 lines) enables ACP clients to receive incremental bash output as it happens, rather than waiting for command completion.

Testing

Tested with opencode-chat-bridge, an ACP client that bridges OpenCode to Matrix chat rooms.

Before this change, running:

echo "Starting..."; sleep 2; echo "Still working..."; sleep 2; echo "Done!"

Would only show output after 4 seconds. After this change, each line appears as it's produced.

image
**Original Pull Request:** https://github.com/anomalyco/opencode/pull/13586 **State:** closed **Merged:** No --- ## Summary Streams partial bash output through ACP during tool execution, enabling real-time feedback in chat bridges and other ACP clients. Fixes #5024 ## Changes In `packages/opencode/src/acp/agent.ts`, added `rawOutput` to the "running" status update: ```typescript case "running": await this.connection.sessionUpdate({ sessionId, update: { sessionUpdate: "tool_call_update", toolCallId: part.callID, status: "in_progress", kind: toToolKind(part.tool), title: part.state.title || part.tool, locations: toLocations(part.tool, part.state.input), rawInput: part.state.input, // NEW: Stream partial output during execution rawOutput: part.state.metadata?.output ? { output: part.state.metadata.output } : undefined, }, }) ``` ## Background The bash tool already updates `ctx.metadata()` with stdout on each chunk (line 179 in `bash.ts`), but this metadata was not being forwarded through ACP during the "running" state. Only "completed" and "error" states included `rawOutput`. This small change (5 lines) enables ACP clients to receive incremental bash output as it happens, rather than waiting for command completion. ## Testing Tested with [opencode-chat-bridge](https://github.com/ominiverdi/opencode-chat-bridge), an ACP client that bridges OpenCode to Matrix chat rooms. Before this change, running: ``` echo "Starting..."; sleep 2; echo "Still working..."; sleep 2; echo "Done!" ``` Would only show output after 4 seconds. After this change, each line appears as it's produced. <img width="563" height="337" alt="image" src="https://github.com/user-attachments/assets/1fb91ac3-95a3-4571-9d18-b522a3428b56" />
yindo added the pull-request label 2026-02-16 18:19:29 -05:00
yindo closed this issue 2026-02-16 18:19:29 -05:00
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Reference: anomalyco/opencode#14724
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