OpenClaw plugin that injects X-Session-Id and X-Turn-Type HTTP headers into every outgoing LLM API request, enabling downstream RL training pipelines to classify and segment training data.

Headers

Header	Value	Description
`X-Session-Id`	`<uuid>`	The active agent session identifier
`X-Turn-Type`	`main`	User-initiated conversation turn
`X-Turn-Type`	`side`	Housekeeping turn (heartbeat, memory flush, cron)

Install

Copy (or symlink) this folder into extensions/rl-training-headers inside your OpenClaw repo.
Enable the plugin:

corepack pnpm start -- plugins enable rl-training-headers

Restart the gateway:

corepack pnpm start -- gateway restart

That's it. Every LLM API request now carries the two extra headers.

Configuration (optional)

You can customize the header names in ~/.openclaw/openclaw.json under plugins.entries:

{
  "plugins": {
    "entries": {
      "rl-training-headers": {
        "enabled": true,
        "config": {
          "sessionIdHeader": "X-Session-Id",
          "turnTypeHeader": "X-Turn-Type"
        }
      }
    }
  }
}

How it works

The plugin hooks into the before_prompt_build lifecycle event to capture the current session ID and turn type (derived from the trigger field: "user" → main, "heartbeat" / "memory" / "cron" → side).

It then patches globalThis.fetch to inject these headers into outgoing POST requests during an active agent run. Header state is stored with async-local per-run context, so parallel sessions keep separate session IDs and turn types.

Extracting training data

On the API proxy / logging side, use these headers to:

Group requests by X-Session-Id to reconstruct full conversation sessions.
Filter by X-Turn-Type: main to keep only user-facing dialogue for reward modelling, or include side turns for full trajectory analysis.