opencode command disappears after exit because auto-upgrade misdetects install method

[vsiegel]

Summary

When opencode starts, the auto-upgrade flow can infer installation method from process.execPath (Node/Bun runtime path) instead of the invoked opencode CLI path. In some local setups this can select the wrong installer path and leave the command unavailable after exit.

System information

• OpenCode version: 1.14.41
• Operating system: Linux

Reproduction

1. Install and run opencode in an environment where runtime executable path differs from the installed CLI shim path.
2. Start opencode and allow startup update checks.
3. Exit the command.
4. Observe that opencode may no longer resolve in shell.

Expected

opencode remains installed and available after running/exiting.

Proposed fix

Use invoked command path (process.argv[1] fallback chain) in installation method detection heuristics, instead of relying on process.execPath.

Related

• Prior auto-closed report: opencode command disappears after first run due to install-method misdetection during upgrade #26473
• Fix PR: fix(installation): detect install method from invoked CLI path #26468