Feature 10: `include_raw`

Status: Deferred / out of scope for the current implementation pass.

Implementation approach: ACP extension

Summary

v1 had an include_raw option that preserved the original agent JSON alongside normalized events. The UniversalEvent.raw field held the verbatim agent output. v1 has _sandboxagent/agent/unparsed for parse errors but no mechanism for clients to request raw agent payloads alongside normalized ACP events.

Current v1 State

_sandboxagent/agent/unparsed — sends notifications when the runtime fails to parse agent output (error recovery only)
No option for clients to request raw agent JSON alongside normal ACP events
ACP events are already the agent's native JSON-RPC output (for agents that speak ACP natively); the "raw" concept is less meaningful when the agent already speaks ACP

v1 Types

pub struct UniversalEvent {
    pub event_id: String,
    pub sequence: u64,
    pub time: String,
    pub session_id: String,
    pub native_session_id: Option<String>,
    pub synthetic: bool,
    pub source: EventSource,
    pub event_type: UniversalEventType,
    pub data: UniversalEventData,
    pub raw: Option<Value>,  // <-- Raw agent output when include_raw=true
}

v1 Usage

legacy event polling endpoint with `include_raw=true`

When include_raw=true, each UniversalEvent included the verbatim JSON the agent process emitted before normalization into the universal schema.

Implementation Plan

Extension Design

Since v1 agents speak ACP natively (JSON-RPC), the "raw" concept changes:

For ACP-native agents: raw = the ACP JSON-RPC envelope itself (which clients already see)
For non-native agents or runtime-synthesized events: raw = the original agent output before transformation

The extension provides a way for clients to opt into receiving the pre-transformation payload.

Opt-in via `_meta`

Client requests raw mode at connection initialization:

{
  "method": "initialize",
  "params": {
    "_meta": {
      "sandboxagent.dev": {
        "includeRaw": true
      }
    }
  }
}

When enabled, notifications forwarded from the agent process include an additional _meta.sandboxagent.dev.raw field containing the original payload:

{
  "jsonrpc": "2.0",
  "method": "session/update",
  "params": {
    // ... normalized ACP event ...
    "_meta": {
      "sandboxagent.dev": {
        "raw": { /* original agent JSON */ }
      }
    }
  }
}

Files to Modify

File	Change
`server/packages/sandbox-agent/src/acp_runtime/mod.rs`	Track per-client `includeRaw` preference; attach raw payload to forwarded notifications when enabled
`sdks/typescript/src/client.ts`	Add `includeRaw` option to connection config; expose raw data on event objects

Docs to Update

Doc	Change
`docs/sdks/typescript.mdx`	Document `includeRaw` option
`research/acp/spec.md`	Document raw extension behavior

3 KiB Raw Blame History

Feature 10: include_raw