session_list tool only returns current session, not all historical sessions #14668

Description

Description
The session_list tool (accessed via /session command in TUI) only returns the currently active session instead of listing all available sessions. However, the underlying database contains all session data correctly, and session_search tool can find sessions properly.
Steps to Reproduce

1. Open OpenCode TUI
2. Run /session command (or use session_list tool)
3. Observe that only 1 session (current) is displayed
4. Verify database contains many sessions:
   python -c "
   import sqlite3
   conn = sqlite3.connect('~/.local/share/opencode/opencode.db')
   cursor = conn.cursor()
   cursor.execute('SELECT COUNT(*) FROM session WHERE parent_id IS NULL')
   print(f'Root sessions: {cursor.fetchone()[0]}')
   "

Expected Behavior
session_list should return all root sessions (sessions with parent_id IS NULL), ordered by time_updated DESC, optionally filtered by:

• directory - filter by project directory
• roots - only return root sessions
• start - filter by timestamp
• limit - maximum number to return
  Actual Behavior
  session_list only returns the currently active session, ignoring all historical sessions.
  Diagnostic Information
  Database Stats
  Total sessions: 1601
  Root sessions (parent_id IS NULL): 123
  Sessions with messages: 84 (in current directory)
  Total messages: 16479
  Database size: 109 MB
  Session API Parameters
  From SDK (@opencode-ai/sdk), the Session.list endpoint supports:
  {
  directory?: string; // Filter by project directory
  roots?: boolean; // Only return root sessions
  start?: number; // Filter by timestamp (ms since epoch)
  search?: string; // Filter by title (case-insensitive)
  limit?: number; // Max sessions to return
  }
  Workaround
  session_search tool works correctly and can find historical sessions:
  session_search query="any_keyword"
  Environment
• OpenCode Version: 1.2.10
• Platform: Windows 11
• Database Path: C:\Users<user>.local\share\opencode\opencode.db
  Additional Context
  The database queries confirm data integrity:
  -- All root sessions exist
  SELECT COUNT(*) FROM session WHERE parent_id IS NULL;
  -- Result: 123
  -- Root sessions with messages
  SELECT COUNT(DISTINCT s.id)
  FROM session s
  JOIN message m ON s.id = m.session_id
  WHERE s.parent_id IS NULL;
  -- Result: 84
  -- Recent root sessions
  SELECT id, title, time_updated
  FROM session
  WHERE parent_id IS NULL
  ORDER BY time_updated DESC
  LIMIT 10;
  -- Returns valid data
  The issue appears to be in the session_list tool implementation, not the API or database layer.

Plugins

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OpenCode version

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Steps to reproduce

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Screenshot and/or share link

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Operating System

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Terminal

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