4cb5f328bb
The win32 tier is exactly the koffi IFileOpenDialog child process; any failure surfaces as-is. The pwsh -> Windows PowerShell 5.1 cascade, the shared WinForms script, and the triple-miss AggregateError are deleted: koffi is a packaged dependency whose availability the install guarantees, so no mechanism fallback exists (the browse backend remains the fallback at the composition level). The pwsh-first DPI picker-fix note is consolidated into a new simplification note recording the reversal.
@deepseek-ai/dsh-host-directory-picker-native
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The native-OS-chooser backend of the directory-picker seam: NativeDirectoryPicker registers ctx.directoryPicker with the native capability, whose pick(signal) opens one native chooser per call and resolves the chosen absolute path (null on cancel). Platform tools run without a shell: osascript on macOS and Zenity with a KDialog fallback on Linux; the caller's abort terminates the native process. Windows opens the modern IFileOpenDialog in a spawned child process — a koffi-driven COM conversation on the child's main thread with the best thread DPI awareness the host accepts (per-monitor-v2 first), aborted by posting WM_CLOSE to the dialog thread. Only viable when the operator sits at the host's display — remote deployments compose -browse instead. The command boundary (DirectoryPickerRunner) and platform facts are injectable for deterministic tests. The shared no-shell subprocess runner lives in dsh-native-command.
Dual-face package: the browser half (./client) registers a renderless flow occupant into ui-workspace's two directory-flow holes — each open request drives host.pickDirectory and reports the one outcome (picked path / cancel / failure) through the hole's owner conversation. One cordis.yml row therefore composes both sides of the native interaction; the client carries no capability-kind branching, and mounting a second flow package fails at load (the holes are single kind).
Model Experience
None, as the backend serves the GUI host's directory selection; nothing here reaches a model request.
KV Cache effect
None; this package neither assembles nor sends a provider request.
Known Limitations and Deferred Work
- Linux requires desktop tooling — with neither Zenity nor KDialog installed,
pickrejects with an actionable error; it does not fall back to a typed-path prompt (the browse backend is that fallback at the composition level). - Windows has no mechanism fallback — the child-process picker is the only tier: koffi is a packaged dependency whose availability the install guarantees, so a failed pick (COM refusal, dialog crash) surfaces the failure instead of degrading to a PowerShell-hosted dialog (the former
pwsh→ Windows PowerShell 5.1 chain was removed). The browse backend remains the fallback at the composition level.