cli: standalone 1.18 CLI fails on a 2.0.25 desktop data directory (Database is not empty and has no session table) #55731

Summary

The standalone CLI 1.18.33 (winget package SST.opencode, 1.18.34 available)
and OpenCode Desktop 2.0.25 share one data directory
(%USERPROFILE%\.local\share\opencode). Every CLI command that opens that
directory fails immediately with a raw database message and exit code 1 —
including read-only commands such as mcp list, stats, session list and
db path. The desktop app's own bundled CLI (v2.0.25) works against the same
directory.

Environment

• opencode version: opencode --version → 1.18.33 (desktop bundle
  %APPDATA%\ai.opencode.desktop\cli\2.0.25\opencode-cli.exe → opencode v2.0.25;
  desktop app version 2.0.25)
• OS: Windows 11 Home, Build 26200 (win32 x64)
• Terminal: Unavailable: no terminal environment variables were set (commands were run from cmd.exe)
• Shell: C:\WINDOWS\system32\cmd.exe
• Install/channel: winget — SST.opencode 1.18.33 (1.18.34 available) and
  SST.OpenCodeDesktop 2.0.25 installed side by side
• Active plugins: rtk.ts (%USERPROFILE%\.config\opencode\plugins\rtk.ts);
  project opencode.json defines one local MCP server (memory, launched with npx)

Reproduction

1. winget install SST.opencode — puts opencode.exe 1.18.33 on PATH.
2. Install and run OpenCode Desktop 2.0.25 so the data directory
   %USERPROFILE%\.local\share\opencode contains opencode.db (with
   opencode.db-shm and opencode.db-wal).
3. Run opencode mcp list from cmd.exe.
4. The same failure occurs with opencode stats, opencode session list and
   opencode db path.

Expected Behavior

opencode mcp list prints the configured servers and their status (as the
bundled CLI does), or fails with an actionable message such as "this data
directory was created by a newer OpenCode version and cannot be read by this
CLI — upgrade OpenCode or point this CLI at another data directory".

Actual Behavior

Error: Unexpected error

Database is not empty and has no session table

Exit code 1. Reproduced on 3 consecutive runs; --print-logs --log-level DEBUG
adds no further output.

Additional Context

• Same data directory, desktop-bundled CLI:
  "%APPDATA%\ai.opencode.desktop\cli\2.0.25\opencode-cli.exe" mcp list →
  ✓ memory connected, exit code 0. This shows the data directory and the MCP
  configuration are healthy, and only the older CLI fails.
• The older CLI cannot even report the database path: opencode db path fails
  with the same message, so the failure happens before any version/diagnostic
  output.
• The failure is not specific to MCP — it reproduces for stats,
  session list and db path, i.e. for anything that opens the data directory.
• Workaround used: call the desktop-bundled CLI by full path instead of the
  PATH CLI.
• Nothing in either install warns that the two packages share one data directory
  with an incompatible schema.