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/btw lets you ask a quick side question about the current session without turning that question into normal conversation history. /side is an alias. It is modeled after Claude Code’s /btw behavior, but adapted to OpenClaw’s Gateway and multi-channel architecture.

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What it does

When you send: 
/btw what changed?
OpenClaw:
  1. snapshots the current session context,
  2. runs a separate ephemeral side query,
  3. answers only the side question,
  4. leaves the main run alone,
  5. does not write the BTW question or answer to session history,
  6. emits the answer as a live side result rather than a normal assistant message.
The important mental model is:
  • same session context
  • separate one-shot side query
  • same native harness transport when the session uses a native harness
  • no future context pollution
  • no transcript persistence
For Codex harness sessions, BTW stays inside Codex by forking the active app-server thread as an ephemeral side thread. That keeps Codex OAuth and native thread behavior intact while still isolating the side answer from the parent transcript. Like Codex /side, the side thread keeps the current Codex permissions and native tool surface, with guardrails that tell the model not to treat inherited parent-thread work as active instructions. Non-Codex runtimes keep the older direct one-shot path.

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What it does not do

/btw does not:
  • create a new durable session,
  • continue the unfinished main task,
  • write BTW question/answer data to transcript history,
  • appear in chat.history,
  • survive a reload.
It is intentionally ephemeral.

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How context works

BTW uses the current session as background context only. If the main run is currently active, OpenClaw snapshots the current message state and includes the in-flight main prompt as background context, while explicitly telling the model:
  • answer only the side question,
  • do not resume or complete the unfinished main task,
  • do not steer the parent conversation.
That keeps BTW isolated from the main run while still making it aware of what the session is about.

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Delivery model

BTW is not delivered as a normal assistant transcript message. At the Gateway protocol level:
  • normal assistant chat uses the chat event
  • BTW uses the chat.side_result event
This separation is intentional. If BTW reused the normal chat event path, clients would treat it like regular conversation history. Because BTW uses a separate live event and is not replayed from chat.history, it disappears after reload.

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Surface behavior

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TUI

In TUI, BTW is rendered inline in the current session view, but it remains ephemeral:
  • visibly distinct from a normal assistant reply
  • dismissible with Enter or Esc
  • not replayed on reload

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External channels

On channels like Telegram, WhatsApp, and Discord, BTW is delivered as a clearly labeled one-off reply because those surfaces do not have a local ephemeral overlay concept. The answer is still treated as a side result, not normal session history.

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Control UI / web

The Gateway emits BTW correctly as chat.side_result, and BTW is not included in chat.history, so the persistence contract is already correct for web. The current Control UI still needs a dedicated chat.side_result consumer to render BTW live in the browser. Until that client-side support lands, BTW is a Gateway-level feature with full TUI and external-channel behavior, but not yet a complete browser UX.

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When to use BTW

Use /btw when you want:
  • a quick clarification about the current work,
  • a factual side answer while a long run is still in progress,
  • a temporary answer that should not become part of future session context.
Examples: 
/btw what file are we editing?
/side what changed while the main run continued?
/btw what does this error mean?
/btw summarize the current task in one sentence
/btw what is 17 * 19?

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When not to use BTW

Do not use /btw when you want the answer to become part of the session’s future working context. In that case, ask normally in the main session instead of using BTW.

Slash commands

Native command catalog and chat directives.

Thinking levels

Reasoning effort levels for the side-question model call.

Session

Session keys, history, and persistence semantics.

Steer command

Inject a steering message into the active run without ending it.