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How to Reset a Stuck AI-Powered LINE Bot: Session Management in Practice

#ai #linebot #webdev #backend

When you run an AI agent as a LINE Bot, you'll eventually hit a problem: as conversations grow longer, the bot's "memory" drifts. It drags in old context, gives irrelevant answers, or gets stuck in an error state it can't escape.

This is a practical guide to resetting LINE Bot sessions running on OpenClaw.

The Problem: A LINE Bot Stuck in a Loop

We run a LINE Bot integrated with a wholesale ERP system. Staff use LINE to check inventory and query sales data.

One day, a specific user's conversation went haywire. No matter what they asked, the bot kept referencing a previous topic. It wasn't recognizing new conversations.

The cause: session contamination.

How OpenClaw Manages Sessions

OpenClaw manages sessions per agent (LLM-based bot). Each LINE user ID is tied to a session where conversation history (transcript) accumulates.

Transcript files are typically stored here:

~/.openclaw/sessions/<session-id>/transcript.json
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This records recent conversations, used as context when processing the next message.

Since LLM context windows have limits, long conversations get compressed (compaction). When compaction is incomplete or error-state messages are mixed in, the bot starts misbehaving.

The Fix: Delete the Transcript File

The simplest solution is to delete the problematic session's transcript file.

# Find the session ID
openclaw sessions list

# Delete the transcript
rm ~/.openclaw/sessions/<session-id>/transcript.json
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After deletion, the next message to the bot starts a fresh session. Context is reset.

What You Lose

Deleting the transcript means that conversation history is completely gone.

  • Binding state (LINE ID ⇔ ERP user mapping) is stored in the DB, so it survives ✅
  • In-progress tasks (e.g., "checking inventory...") get reset ⚠️
  • All recent conversation context with the user is lost ⚠️

If you store auth info or business data only in session memory, you'll lose it on reset. Data that needs to persist belongs in a database — whether this rule is followed determines how safe a reset is.

Designing Safer Resets

Directly deleting transcripts is "surgery." It works for emergencies, but a better approach is providing reset functionality in the application itself.

For example, implementing a reset command in the LINE Bot:

// Inside the LINE webhook handler
if (message.text === 'リセット' || message.text === '/reset') {
  await clearUserSession(event.source.userId);
  await lineClient.replyMessage(event.replyToken, {
    type: 'text',
    text: 'Session reset. Please start your conversation again.',
  });
  return;
}
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clearUserSession() calls the OpenClaw API or filesystem to delete the transcript. When users can reset themselves, admins don't need to touch files directly.

Summary

Method Ease Risk Use Case
Transcript file deletion High Medium (history loss) Emergency fix
In-app reset command Medium (needs implementation) Low Daily operations
Session TTL configuration Low (config change) Low Prevention

Whether it's a LINE Bot or any other AI agent, if you're running them long-term, session lifecycle management must be part of your design. "What do we do when it loops?" is too late to figure out after it happens.

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