[BUG] ENOENT on first run: cache directory not created before writing version file #11425

Description

On first run, OpenCode fails with ENOENT: no such file or directory when trying to write to ~/.cache/opencode/version.

The issue is in packages/opencode/src/global/index.ts. The code creates directories for data, config, state, log, and bin, but does not create the cache directory:

await Promise.all([
  fs.mkdir(Global.Path.data, { recursive: true }),
  fs.mkdir(Global.Path.config, { recursive: true }),
  fs.mkdir(Global.Path.state, { recursive: true }),
  fs.mkdir(Global.Path.log, { recursive: true }),
  fs.mkdir(Global.Path.bin, { recursive: true }),
  // Missing: fs.mkdir(Global.Path.cache, { recursive: true }),
])

Later, the code tries to write to the cache directory (line 54):

await Bun.file(path.join(Global.Path.cache, "version")).write(CACHE_VERSION)

This fails because the parent directory doesn't exist.

Error Message

ENOENT: no such file or directory, open '/Users/xxx/.cache/opencode/version'
path: "/Users/xxx/.cache/opencode/version",
syscall: "open",
errno: -2,
code: "ENOENT"
Bun v1.3.5 (macOS x64)

OpenCode version

1.1.47

Steps to reproduce

1. Fresh install OpenCode on a system where ~/.cache/opencode/ does not exist
2. Run opencode
3. Observe ENOENT error

Expected behavior

OpenCode should create the cache directory before attempting to write the version file.

Suggested fix

Add fs.mkdir(Global.Path.cache, { recursive: true }) to the directory creation block in packages/opencode/src/global/index.ts.

Operating System

macOS (also reported on other platforms)

Terminal

Any