Bug Report: Session Token Count Not Reset After Compaction

Summary

After compaction clears messages, session.totalTokens is not reset to 0, causing the compaction safeguard to trigger repeatedly in an infinite loop.

Environment

• OpenClaw Version: 2026.4.15 (041266a)
• OS: macOS (Darwin 25.3.0 arm64)
• Node: v24.13.1
• Agent: main (relay47/claude-opus-4-7)
• Session Type: Telegram group chat (long-running)

Steps to Reproduce

1. Start a long-running Telegram group chat session
2. Continue conversation until totalTokens exceeds compaction threshold
3. Compaction triggers and clears messages
4. Observe that totalTokens remains at old value
5. Next message triggers compaction again
6. Gateway logs: "Compaction safeguard: no real conversation messages to summarize"
7. Loop repeats indefinitely

Expected Behavior

After compaction clears messages:

• session.totalTokens should be reset to 0
• session.estimatedCostUsd should be reset to 0
• Next message should start fresh token counting

Actual Behavior

• Messages are cleared (0 messages in JSONL file)
• session.totalTokens remains at old value (38746 in our case)
• Compaction safeguard triggers on every message
• Session becomes unusable

Evidence

Session State (from sessions_list)

{
  "sessionId": "583e6528-9941-4cbd-a7ee-ecec55154432",
  "totalTokens": 38746,
  "contextTokens": 70000,
  "status": "running"
}

Actual Message Count

$ cat ~/.openclaw/agents/main/sessions/583e6528-9941-4cbd-a7ee-ecec55154432.jsonl | jq -s 'map(select(.role == "user" or .role == "assistant")) | length'
0

Gateway Logs

2026-04-20T17:27:45 [compaction-safeguard] Compaction safeguard: no real conversation messages to summarize
2026-04-20T17:29:51 [compaction-safeguard] Compaction safeguard: no real conversation messages to summarize
2026-04-20T17:33:01 [compaction-safeguard] Compaction safeguard: no real conversation messages to summarize

Proposed Fix

// After compaction clears messages
session.messages = [];
session.totalTokens = 0;  // ADD THIS
session.estimatedCostUsd = 0;  // ADD THIS

Workaround

rm ~/.openclaw/agents/main/sessions/<session-id>.jsonl

Impact

• Severity: High
• Affected: Long-running sessions (Telegram groups, persistent chats)
• User Experience: Session becomes unusable, requires manual intervention

Reported by: alshyib
Date: 2026-04-20
Version: 2026.4.15 (041266a)