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Add tool result streaming

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- Add AgentToolUpdateCallback type and optional onUpdate callback to AgentTool.execute()
- Add tool_execution_update event with toolCallId, toolName, args, partialResult
- Normalize tool_execution_end to always use AgentToolResult (no more string fallback)
- Bash tool streams truncated rolling buffer output during execution
- ToolExecutionComponent shows last N lines when collapsed (not first N)
- Interactive mode handles tool_execution_update events
- Update RPC docs and ai/agent READMEs

fixes #44
This commit is contained in:
Mario Zechner 2025-12-16 14:53:17 +01:00
parent 8319628bc3
commit 7ac832586f
12 changed files with 362 additions and 51 deletions
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24
packages/coding-agent/docs/rpc.md
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@ -553,6 +553,7 @@ Events are streamed to stdout as JSON lines during agent operation. Events do NO
| `message_update` | Streaming update (text/thinking/toolcall deltas) |
| `message_end` | Message completes |
| `tool_execution_start` | Tool begins execution |
| `tool_execution_update` | Tool execution progress (streaming output) |
| `tool_execution_end` | Tool completes |
| `auto_compaction_start` | Auto-compaction begins |
| `auto_compaction_end` | Auto-compaction completes |
@ -645,9 +646,9 @@ Example streaming a text response:
{"type":"message_update","message":{...},"assistantMessageEvent":{"type":"text_end","contentIndex":0,"content":"Hello world","partial":{...}}}
```
### tool_execution_start / tool_execution_end
### tool_execution_start / tool_execution_update / tool_execution_end
Emitted when a tool begins and completes execution.
Emitted when a tool begins, streams progress, and completes execution.
```json
{
@ -658,6 +659,23 @@ Emitted when a tool begins and completes execution.
}
```
During execution, `tool_execution_update` events stream partial results (e.g., bash output as it arrives):
```json
{
"type": "tool_execution_update",
"toolCallId": "call_abc123",
"toolName": "bash",
"args": {"command": "ls -la"},
"partialResult": {
"content": [{"type": "text", "text": "partial output so far..."}],
"details": {"truncation": null, "fullOutputPath": null}
}
}
```
When complete:
```json
{
"type": "tool_execution_end",
@ -671,7 +689,7 @@ Emitted when a tool begins and completes execution.
}
```
Use `toolCallId` to correlate `tool_execution_start` with `tool_execution_end`.
Use `toolCallId` to correlate events. The `partialResult` in `tool_execution_update` contains the accumulated output so far (not just the delta), allowing clients to simply replace their display on each update.
### auto_compaction_start / auto_compaction_end