[FEATURE]: Add Windows arm64 support

[LayZeeDK]

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

After installing OpenCode on Windows 11 Business arm64 using WinGet, Chocolatey, or npm install --global opencode-ai, the following error is output but no opencode-windows-arm64 npm package exists or is attached to a GitHub Release.

It seems that your package manager failed to install the right version of the opencode CLI for your platform. You can try manually installing the "opencode-windows-arm64" package

Please add Windows arm64 support 🙇‍♂️

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• It seems that your package manager failed to install the right version of the opencode CLI for your platform. You can try manually installing the "opencode-windows-x64" package #3002: Same error pattern for Windows x64 - "It seems that your package manager failed to install the right version of the opencode CLI for your platform"

Both issues report the same underlying problem with missing Windows platform-specific packages, just for different architectures (arm64 vs x64). This suggests a broader Windows platform support issue.

Feel free to ignore if none of these address your specific case.

[rekram1-node]

Will do

[Volko61]

@rekram1-node You're the goat ! I don't use opencode just because there is no windows arm binaries

[rekram1-node]

I think this may be blocked by the upstream bun issue

Ref:

—target | Operating System | Architecture | Modern | Baseline | Libc
-- | -- | -- | -- | -- | --
bun-linux-x64 | Linux | x64 | ✅ | ✅ | glibc
bun-linux-arm64 | Linux | arm64 | ✅ | N/A | glibc
bun-windows-x64 | Windows | x64 | ✅ | ✅ | -
bun-windows-arm64 | Windows | arm64 | ❌ | ❌ | -
bun-darwin-x64 | macOS | x64 | ✅ | ✅ | -
bun-darwin-arm64 | macOS | arm64 | ✅ | N/A | -
bun-linux-x64-musl | Linux | x64 | ✅ | ✅ | musl
bun-linux-arm64-musl | Linux | arm64 | ✅ | N/A

So it likely wont be a simple fix

[thdxr]

and it's even further upstream, webkit is the first thing to figure out
oven-sh/WebKit#105