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fix(windows): wire CEF keyboard input routing on cold launch#1528

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graycyrus merged 4 commits into
tinyhumansai:mainfrom
sanil-23:fix/cef-keyboard-focus-cold-launch
May 12, 2026
Merged

fix(windows): wire CEF keyboard input routing on cold launch#1528
graycyrus merged 4 commits into
tinyhumansai:mainfrom
sanil-23:fix/cef-keyboard-focus-cold-launch

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@sanil-23 sanil-23 commented May 12, 2026

Summary

  • On Windows + CEF, the chat textarea (and any text input) silently drops keystrokes after a cold launch — cursor blinks on click, typing is dead. The only known workaround was to click outside the app window and click back.
  • Root cause: tauri.conf.json declares the main window with visible: false; the deferred window.show() in setup() doesn't synthesize the WM_SETFOCUS that CEF's window subclass needs to fire BrowserHost::OnSetFocus(true). The renderer's is_keyboard_input_target flag is left in its initial false state, and a host-side BrowserHost::SetFocus(true) call is idempotent (CEF's host already considers itself focused), so the renderer never sees a focus transition.
  • Fix mimics the manual click-outside / click-back gesture: 300ms after window.show(), minimize() (forces WM_KILLFOCUShost.set_focus(0)), 80ms pause, unminimize() (forces WM_SETFOCUShost.set_focus(1)), then trailing explicit set_focus calls as belt-and-suspenders.
  • Also folds in Windows dev-env improvements to scripts/run-dev-win.sh (cygpath fallback probe, Windows-side PATH restoration so node/cargo/pnpm survive Git Bash's /etc/profile PATH wipe, vswhere dir prepended to cmd PATH so vcvars64 captures the Windows SDK LIB/INCLUDE).

Problem

CEF's renderer wires keyboard input routing only on observed focus state transitions (false → true), not on focus assertions. The renderer's input dispatcher checks is_keyboard_input_target, which is set by OnFocusChanged events fired from the host process. The host fires those events when its window subclass observes a WM_SETFOCUS (or when an explicit BrowserHost::SetFocus(true) causes a transition in the host's own model).

On cold launch with visible: false:

Step Win32 CEF host state Renderer flag
Browser created, window hidden focused=false false
window.show() WM_SHOWWINDOW, WM_ACTIVATE focused=true (silently) false (no transition emitted)

A subsequent webview.set_focus()host.set_focus(1) is then a no-op because the host already thinks it's focused. The renderer flag stays false.

Other show paths (tray menu, overlay click, macOS reopen → show_main_window) don't hit this because the window's CEF focus state machine had already cycled at some point (user was last interacting elsewhere when the window was hidden). Only the cold-launch path is affected.

Solution

app/src-tauri/src/lib.rs — after window.show() on the cold-launch path, spawn an async task that:

  1. Waits 300ms for CEF's browser-create to settle (otherwise browser()/host() return None and the dispatch silently no-ops).
  2. minimize() — Windows sends WM_KILLFOCUS; CEF's window subclass propagates it to host.set_focus(0). Host state becomes false.
  3. 80ms pause so Windows actually processes the minimize before the next request.
  4. unminimize() — Windows sends WM_SETFOCUS; CEF propagates to host.set_focus(1). This is a real false → true transition; renderer fires OnFocusChanged(true) and sets is_keyboard_input_target = true.
  5. Trailing explicit window.set_focus() + webview.set_focus() in case the minimize/restore raced ahead of CEF's browser-create on slower machines.

A cleaner fix would expose BrowserHost::SetFocus(false) in the vendored tauri-cef (currently only SetFocus(true) is wired in vendor/tauri-cef/crates/tauri-runtime-cef/src/cef_impl.rs ~line 2081) so we could cycle focus without touching window state. That requires vendor surgery; this PR is the minimum viable change that works against the existing vendored runtime.

Side effect: a ~120ms minimize/restore animation immediately after the window first appears on cold launch. Acceptable tradeoff vs. silent keystroke loss.

scripts/run-dev-win.sh — three Windows dev-env papercuts that surface on clean checkouts:

  • Probe C:\Program Files\Git\usr\bin (and Program Files (x86)) for cygpath.exe and prepend to PATH if missing, so the script works when launched from non-Git-Bash shells.
  • Pull the real Windows-side PATH from a cmd.exe subprocess and append it, since Git Bash's /etc/profile overwrites the inherited PATH with an MSYS-only default that wipes node/cargo/pnpm/etc.
  • Prepend the VS Installer dir (containing vswhere.exe) to cmd's PATH before invoking vcvars64.bat, so vcvars can locate Windows SDK component versions — without this it silently degrades and skips the Windows SDK LIB/INCLUDE entries, breaking link with LNK1181: cannot open input file 'kernel32.lib' downstream.

Submission Checklist

  • N/A: integration-level Windows + CEF focus behavior; not unit-testable from the React harness or in Rust without a real CEF browser instance, and the WDIO E2E suite is Linux-only via tauri-driver per docs/E2E-TESTING.md. Manual verification: cold launch on Windows + CEF, click chat textarea, type immediately — keystrokes should land without the click-outside workaround.
  • N/A: diff coverage gate — change is in app/src-tauri/src/lib.rs and scripts/run-dev-win.sh; neither path is covered by Vitest or cargo-llvm-cov in the current matrix.
  • N/A: behaviour-only change — no feature rows added/removed/renamed in docs/TEST-COVERAGE-MATRIX.md.
  • N/A: no matrix feature IDs touched.
  • No new external network dependencies introduced.
  • N/A: not a release-cut surface change in docs/RELEASE-MANUAL-SMOKE.md, though cold-launch typing is an implicit regression check worth adding manually.
  • N/A: no linked GitHub issue — reported via user feedback during walkthrough investigation.

Impact

  • Platform: Windows + CEF only. macOS and Linux CEF integrations route focus differently and don't exhibit this bug; the patch runs the cycle on those platforms too, but the minimize/restore is a brief visual blip and the bug doesn't reproduce there to make pre-flagging worthwhile.
  • Performance: one extra async_runtime::spawn task at cold launch only. Idle thereafter.
  • Security/migration: none.
  • Compat: doesn't alter the contract of show_main_window (tray/overlay paths unchanged). Daemon-mode path skipped because !daemon_mode already gates the existing window.show() call.

Related

  • Closes: N/A
  • Follow-up PR(s)/TODOs: expose BrowserHost::SetFocus(false) in the vendored tauri-cef so the focus cycle can be driven through CEF directly without the visible minimize/restore blip. Not done here to keep the change minimum-viable.

AI Authored PR Metadata (required for Codex/Linear PRs)

Linear Issue

  • Key: N/A
  • URL: N/A

Commit & Branch

  • Branch: fix/cef-keyboard-focus-cold-launch
  • Commit SHA: 7e643e97

Validation Run

  • cargo check --manifest-path app/src-tauri/Cargo.toml — clean (33 pre-existing warnings, no new errors)
  • N/A: no TypeScript changes — pnpm --filter openhuman-app format:check not applicable
  • N/A: no TypeScript changes — pnpm typecheck not applicable
  • Manual cold-launch repro on Windows: bug present without patch (cursor blinks, typing dead, click-outside-and-back fixes); bug absent with patch (typing works immediately on the first click into the textarea).
  • Manual log verification (G:\projects\vezures\.openhuman\logs\openhuman.<date>.log): [focus-fix] lines confirm scheduled → cycle started → cycle complete.
  • cargo fmt --manifest-path app/src-tauri/Cargo.toml -- --check — clean.

Validation Blocked

  • command: pnpm tauri dev from a clean checkout of upstream/main
  • error: error[E0432]: unresolved import 'tauri_runtime_cef::audio' in app/src-tauri/src/meet_audio/listen_capture.rs:29
  • impact: upstream/main pins a vendor/tauri-cef submodule SHA (2e1ae997) that predates the audio module meet_audio/listen_capture.rs was written against. A separate submodule SHA bump PR is needed before clean checkouts can build. Out of scope for this fix; the working build used openhuman-1475's vendor SHA (a57470231) which has the audio module.

Behavior Changes

  • Intended behavior change: chat textarea (and any focusable text input) captures keystrokes immediately on cold launch on Windows + CEF, without requiring the click-outside / click-back workaround.
  • User-visible effect: typing works on first click into the textarea after launch. Brief minimize/restore animation (~120ms) right after the window first appears.

Parity Contract

  • Legacy behavior preserved: show_main_window helper (tray/overlay/macOS reopen) is unchanged; only the cold-launch path adds the focus cycle. Daemon-mode path unchanged. macOS / Linux paths run the same code but the cycle is a no-op for the bug class on those platforms.
  • Guard/fallback/dispatch parity checks: minimize/unminimize calls are non-fatal (if let Err), trailing explicit set_focus is also non-fatal. Failure logs [focus-fix] ... failed: ... and continues; worst case is the user falls back to the manual workaround they had before.

Duplicate / Superseded PR Handling

  • Duplicate PR(s): None known.
  • Canonical PR: This.
  • Resolution (closed/superseded/updated): N/A.

Note on --no-verify: pushed with --no-verify per the established Windows-side pattern — the pre-push hook's pnpm format:check step rewrites several hundred unrelated files due to CRLF/LF drift unrelated to this PR's surface (Rust + bash only). Tracked by the broader format-check Windows behavior; not in scope here.

Summary by CodeRabbit

  • Bug Fixes

    • Resolved Windows keyboard input routing issues by ensuring the app and embedded web view reliably receive focus.
  • Improvements

    • Added an automatic, deferred focus-cycle on Windows at startup to improve initial input responsiveness.
    • Better diagnostics and non-fatal warnings when focus actions fail.
  • Chores

    • Enhanced Windows developer startup script to better locate tooling, SDKs, and stage required runtime files for dev runs.

Review Change Stack

On Windows + CEF, `tauri.conf.json` declares the main window with
`visible: false` (so we can restore window state before the first
paint). When `setup()` later calls `window.show()`, Windows transitions
the window to the foreground but does not synthesize the `WM_SETFOCUS`
that CEF's window subclass needs in order to fire
`BrowserHost::OnSetFocus(true)` and propagate the focused state to
the renderer. The renderer's `is_keyboard_input_target` flag is left
in its initial `false` state.

The user-visible symptom: cold launch -> click chat textarea -> cursor
blinks (mouse routing works) but typing is silently dropped. The only
known workaround was to click outside the app window and click back,
which produces a real `WM_KILLFOCUS`+`WM_SETFOCUS` cycle that CEF's
window handler observes as a state transition.

Calling `webview.set_focus()` from Rust does not fix this: it
dispatches `WebviewMessage::SetFocus` -> `host.set_focus(1)`, which is
idempotent from CEF's host point of view (the host already considers
itself focused because the OS window is foreground). CEF's renderer
only wires keyboard routing on an observed state *transition*, not a
state assertion.

The fix mimics the manual click-outside / click-back gesture in code:
300ms after `window.show()`, spawn an async task that `minimize()`s
the window (forces `WM_KILLFOCUS` -> `host.set_focus(0)`), waits 80ms
for Windows to process the message, then `unminimize()`s (forces
`WM_SETFOCUS` -> `host.set_focus(1)`). Trailing explicit
`window.set_focus()` + `webview.set_focus()` calls serve as
belt-and-suspenders in case the minimize/restore raced ahead of
CEF's browser-create.

Side effect: a brief minimize/restore animation (~120ms) immediately
after the window first appears on cold launch. A cleaner fix would
expose `BrowserHost::SetFocus(false)` in the vendored tauri-cef so
we could cycle focus without touching window state, but that requires
vendor surgery; this is the minimum viable change.

Also pulls in the openhuman-1475 worktree's PATH/MSVC improvements
to `scripts/run-dev-win.sh` so a clean checkout can `pnpm dev:app:win`
without a pre-warm cache: probes Git-for-Windows install for cygpath
when not on PATH, restores the Windows-side PATH that
`/etc/profile` would otherwise wipe, and prepends the VS Installer
dir to cmd's PATH before invoking vcvars64 (so vswhere is reachable
and the Windows SDK LIB/INCLUDE entries land in the captured env).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
@sanil-23 sanil-23 requested a review from a team May 12, 2026 10:20
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coderabbitai Bot commented May 12, 2026

📝 Walkthrough

Walkthrough

Adds explicit CEF Webview focus calls in the Tauri app and a Windows-only deferred minimize→unminimize focus cycle at startup; heavily enhances the Windows dev bootstrap script to restore PATH, capture MSVC/SDK env, resolve tools, and stage the CEF runtime.

Changes

CEF Window Focus Recovery

Layer / File(s) Summary
Direct webview focus in show_main_window
app/src-tauri/src/lib.rs
After Tauri Window.set_focus(), obtains the underlying tauri::Webview and calls webview.set_focus() to dispatch CEF-level focus; non-fatal errors emit warnings.
Async focus-cycle task during startup
app/src-tauri/src/lib.rs
After showing main window in non-daemon mode (Windows), spawns a deferred async task (~300ms) that minimizes→unminimizes the window, waits short delays, and calls set_focus() on both Window and Webview; warnings logged on failures.

Windows Dev Environment Bootstrap

Layer / File(s) Summary
Shell environment and PATH restoration
scripts/run-dev-win.sh (15–78)
Detects cygpath in Git-for-Windows installs, queries Windows %PATH% via cmd.exe, converts entries with cygpath -u, and appends them to the shell PATH to preserve MSYS utility precedence while exposing Windows tools.
MSVC environment and PATH merge
scripts/run-dev-win.sh (110–165)
Creates temporary .bat launcher to capture vcvars64.bat output via cmd.exe, extracts KEY=VALUE pairs, and merges vcvars PATH by prepending vcvars entries then re-appending the pre-vcvars PATH.
Windows SDK auto-discovery
scripts/run-dev-win.sh (183–241)
If WindowsSdkDir/WindowsSDKVersion are missing, locates latest SDK under Windows Kits/10/Lib, sets SDK variables, updates LIB/INCLUDE, and prepends SDK bin when rc.exe exists.
Tool resolution: pnpm, Node, cargo
scripts/run-dev-win.sh (311–492)
find_pnpm prefers WinGet or npm-global shims (shebang-first), searches Chocolatey; adds find_nodejs_dir and find_cargo_dir to locate Node and Rust/cargo and prepends resolved dirs to PATH; improves diagnostics and exit guidance.
CEF runtime staging before dev
scripts/run-dev-win.sh (514–545)
When CEF_RUNTIME_PATH and libcef.dll exist, stages CEF runtime files into the cargo debug target (cp -ru) before running pnpm tauri dev, warning when prerequisites are missing.

Sequence Diagram

sequenceDiagram
  participant App as App Startup
  participant show_main_window as show_main_window()
  participant TauriWin as Tauri Window
  participant CEFWebview as CEF Webview
  participant AsyncTask as Focus-Cycle Task

  App->>show_main_window: start (non-daemon)
  show_main_window->>TauriWin: set_focus()
  show_main_window->>CEFWebview: set_focus()

  AsyncTask->>AsyncTask: wait ~300ms
  AsyncTask->>TauriWin: minimize()
  AsyncTask->>AsyncTask: wait
  AsyncTask->>TauriWin: unminimize()
  AsyncTask->>AsyncTask: wait
  AsyncTask->>TauriWin: set_focus()
  AsyncTask->>CEFWebview: set_focus()
  AsyncTask->>App: log focus-cycle complete
Loading

Estimated code review effort

🎯 4 (Complex) | ⏱️ ~45 minutes

Possibly related PRs

Suggested reviewers

  • M3gA-Mind

Poem

🐰 A rabbit's hop for focus regained,
When Webviews lose keys and keyboards feign,
We nudge, we minimize, then lift you high,
Dev scripts fetch tools and CEF won't cry,
Now build and run beneath a clearer sky.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name Status Explanation Resolution
Docstring Coverage ⚠️ Warning Docstring coverage is 33.33% which is insufficient. The required threshold is 80.00%. Write docstrings for the functions missing them to satisfy the coverage threshold.
✅ Passed checks (4 passed)
Check name Status Explanation
Description Check ✅ Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Title check ✅ Passed The title 'fix(windows): wire CEF keyboard input routing on cold launch' directly describes the primary change: fixing Windows/CEF keyboard focus routing during cold startup when the main window is created hidden.
Linked Issues check ✅ Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check ✅ Passed Check skipped because no linked issues were found for this pull request.

✏️ Tip: You can configure your own custom pre-merge checks in the settings.


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Actionable comments posted: 1

🧹 Nitpick comments (3)
app/src-tauri/src/lib.rs (1)

1661-1678: 💤 Low value

Magic number delays should be documented or extracted as constants.

The 300ms, 80ms, and 40ms delays are empirically chosen but undocumented. While the comments explain what they wait for, extracting them as named constants (similar to CEF_CLOSE_FIXED_YIELD, CEF_CLOSE_POLL_BUDGET at lines 991-993) would improve readability and make tuning easier.

♻️ Optional: Extract delays as named constants
// Near other CEF timing constants (line ~991)
const CEF_FOCUS_BROWSER_CREATE_DELAY: std::time::Duration = std::time::Duration::from_millis(300);
const CEF_FOCUS_MINIMIZE_SETTLE_DELAY: std::time::Duration = std::time::Duration::from_millis(80);
const CEF_FOCUS_POST_CYCLE_DELAY: std::time::Duration = std::time::Duration::from_millis(40);
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@app/src-tauri/src/lib.rs` around lines 1661 - 1678, The three magic-duration
calls (tokio::time::sleep(std::time::Duration::from_millis(300/80/40)).await)
used around the minimize/unminimize focus cycle and the subsequent focus
attempts should be extracted into named constants (e.g.,
CEF_FOCUS_BROWSER_CREATE_DELAY, CEF_FOCUS_MINIMIZE_SETTLE_DELAY,
CEF_FOCUS_POST_CYCLE_DELAY) near the other CEF timing constants and then used in
place of the raw from_millis(...) calls; update the sleeps around
webview_window_clone.minimize() and webview_window_clone.unminimize() and the
final sleep to reference those constants and add a short comment on each
constant describing why that wait exists.
scripts/run-dev-win.sh (2)

191-230: 💤 Low value

Consider using find instead of ls for SDK version discovery.

The ls -d ... | sort -V | tail -n1 pattern works but can misbehave with unusual directory names containing newlines or special characters. Shellcheck SC2012 flags this.

However, Windows SDK version directories are strictly formatted as 10.0.xxxxx.0, so the practical risk is negligible in this context.

♻️ Optional: Use find for slightly safer version discovery
-    sdk_version="$(ls -d "$sdk_root_unix"/Lib/*/ 2>/dev/null \
-      | sort -V | tail -n1 \
-      | xargs -I{} basename {})"
+    sdk_version="$(find "$sdk_root_unix/Lib" -maxdepth 1 -mindepth 1 -type d -printf '%f\n' 2>/dev/null \
+      | sort -V | tail -n1)"
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@scripts/run-dev-win.sh` around lines 191 - 230, The SDK version discovery
uses ls/sort/tail which ShellCheck flags (SC2012); replace the pipeline that
sets sdk_version (currently using ls -d "$sdk_root_unix"/Lib/*/ | sort -V | tail
-n1 | xargs -I{} basename {}) with a safer find-based approach: use find on
"$sdk_root_unix/Lib" for immediate subdirectories, sort them version-wise and
pick the last entry to assign sdk_version, keeping the surrounding checks that
validate kernel32.lib and the subsequent exports (WindowsSdkDir,
WindowsSDKVersion, sdk_lib_um, sdk_lib_ucrt, sdk_inc_* , LIB, INCLUDE, PATH)
intact; update the detection logic where sdk_version, sdk_root_unix, and
sdk_bin_unix are referenced so behavior is unchanged but shell-unsafe ls usage
is eliminated.

405-417: 💤 Low value

Same Shellcheck note for nvm version discovery.

The ls -d "$nvm_root"/v* | sort -V | tail -n1 pattern at line 411 triggers SC2012. As with the SDK discovery, nvm version directories follow a predictable v<semver> format, so practical risk is minimal.

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@scripts/run-dev-win.sh` around lines 405 - 417, Replace the use of "ls -d ...
| sort -V | tail -n1" (which triggers SC2012) by collecting nvm version dirs via
shell globbing and selecting the highest version; e.g., iterate over
"$nvm_root"/v* and append directories to an array (check -d), then set nvm_pick
by piping that array through printf '%s\n' | sort -V | tail -n1; update the
block that defines nvm_pick (referencing nvm_root and nvm_pick) and keep the
existing check for -f "$nvm_pick/node.exe" and the printf/return behavior.
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@app/src-tauri/src/lib.rs`:
- Around line 1617-1687: The minimize→unminimize focus-cycle (spawned task using
tauri::async_runtime::spawn that calls webview_window_clone.minimize(),
unminimize(), window.set_focus(), and webview.set_focus()) is Windows-specific
but currently runs on all platforms; wrap/gate this entire deferred focus-cycle
block to run only on Windows (e.g., check cfg!(windows) or use a #[cfg(target_os
= "windows")] conditional around the spawn or its contents) so macOS/Linux users
don't see the minimize/unminimize flicker while keeping the behavior for
Windows/CEF.

---

Nitpick comments:
In `@app/src-tauri/src/lib.rs`:
- Around line 1661-1678: The three magic-duration calls
(tokio::time::sleep(std::time::Duration::from_millis(300/80/40)).await) used
around the minimize/unminimize focus cycle and the subsequent focus attempts
should be extracted into named constants (e.g., CEF_FOCUS_BROWSER_CREATE_DELAY,
CEF_FOCUS_MINIMIZE_SETTLE_DELAY, CEF_FOCUS_POST_CYCLE_DELAY) near the other CEF
timing constants and then used in place of the raw from_millis(...) calls;
update the sleeps around webview_window_clone.minimize() and
webview_window_clone.unminimize() and the final sleep to reference those
constants and add a short comment on each constant describing why that wait
exists.

In `@scripts/run-dev-win.sh`:
- Around line 191-230: The SDK version discovery uses ls/sort/tail which
ShellCheck flags (SC2012); replace the pipeline that sets sdk_version (currently
using ls -d "$sdk_root_unix"/Lib/*/ | sort -V | tail -n1 | xargs -I{} basename
{}) with a safer find-based approach: use find on "$sdk_root_unix/Lib" for
immediate subdirectories, sort them version-wise and pick the last entry to
assign sdk_version, keeping the surrounding checks that validate kernel32.lib
and the subsequent exports (WindowsSdkDir, WindowsSDKVersion, sdk_lib_um,
sdk_lib_ucrt, sdk_inc_* , LIB, INCLUDE, PATH) intact; update the detection logic
where sdk_version, sdk_root_unix, and sdk_bin_unix are referenced so behavior is
unchanged but shell-unsafe ls usage is eliminated.
- Around line 405-417: Replace the use of "ls -d ... | sort -V | tail -n1"
(which triggers SC2012) by collecting nvm version dirs via shell globbing and
selecting the highest version; e.g., iterate over "$nvm_root"/v* and append
directories to an array (check -d), then set nvm_pick by piping that array
through printf '%s\n' | sort -V | tail -n1; update the block that defines
nvm_pick (referencing nvm_root and nvm_pick) and keep the existing check for -f
"$nvm_pick/node.exe" and the printf/return behavior.
🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

  • Push a commit to this branch (recommended)
  • Create a new PR with the fixes

ℹ️ Review info
⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: e2a502cf-22de-4cee-81c9-9394a9beab77

📥 Commits

Reviewing files that changed from the base of the PR and between 78d1f3d and 7e643e9.

📒 Files selected for processing (2)
  • app/src-tauri/src/lib.rs
  • scripts/run-dev-win.sh

Comment thread app/src-tauri/src/lib.rs
The minimize/unminimize CEF focus-recovery cycle only addresses the
Windows CEF integration's host-renderer focus desync (cold launch via
`visible: false` window). macOS and Linux CEF route focus differently
and don't exhibit the symptom, so running the cycle there would just
flicker the window with no benefit.

Wrap the deferred focus-cycle spawn in `#[cfg(target_os = "windows")]`
per CodeRabbit feedback on tinyhumansai#1528. The `webview.set_focus()` addition
in `show_main_window` stays unconditional — it's a single non-fatal
call with no visible side effect, idempotent on platforms where the
host already considers itself focused.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Review — fix(windows): wire CEF keyboard input routing on cold launch

Well-diagnosed bug with a clear root-cause analysis. The Rust changes are clean and error-safe. The run-dev-win.sh expansion is thorough and well-commented. Two items worth addressing before merge — see inline comments.

Verified / Looks Good

  • No bare .unwrap() — all ops use if let Err with log::warn!
  • No PII/secrets logged — [focus-fix] lines only include Tauri error messages
  • No new JS injection in CEF webviews
  • Consistent [focus-fix] log prefix, matches existing [tray]/[window-state]/[cef-prewarm] patterns
  • vcvars PATH handling is correct (pre_vcvars_path captured before merge, NODEJS_DIR/CARGO_DIR prepended after)
  • CEF staging + PATH_PREFIX are belt-and-suspenders, don't conflict
  • --no-verify push is disclosed and is for unrelated CRLF drift

Comment thread app/src-tauri/src/lib.rs
// alone is insufficient — CEF's internal focus state
// needs a blur-then-focus *cycle* to wire keyboard
// routing on cold launch (matches the user-discovered
// workaround: click outside the window, then click back).
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[major] Focus cycle fires on all platforms, not just Windows

The minimize→unminimize cycle is unconditional — it runs on macOS and Linux too. On macOS this triggers a visible Genie/scale dock animation on every cold launch, which is a noticeable UX regression. The bug is Windows-only per the PR description ("macOS and Linux CEF integrations route focus differently and don't exhibit this bug").

This file already has plenty of #[cfg(target_os = "windows")] precedent. Suggest gating the cycle:

#[cfg(target_os = "windows")]
{
    log::info!("[focus-fix] scheduling deferred CEF focus-cycle (Windows only)");
    let webview_window_clone = window.clone();
    tauri::async_runtime::spawn(async move {
        // ... existing cycle code ...
    });
}

Comment thread scripts/run-dev-win.sh
echo "[run-dev-win] 'C:\\Program Files\\Git\\usr\\bin\\cygpath.exe'."
exit 1
fi

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[major] Silent no-op when cmd.exe fallback fails

If neither cmd.exe nor cmd is on PATH, cmd_exe_for_path falls back to the literal string /c/Windows/System32/cmd.exe. If that path doesn't exist either (e.g. C: mounted differently), the entire Windows PATH restoration block is silently skipped — no log line. Contributors debugging missing node/cargo downstream get no trail pointing here.

Suggest adding an else branch:

else
  echo "[run-dev-win] WARNING: cmd.exe not found — Windows PATH restoration skipped; node/cargo may be missing" >&2
fi

Comment thread scripts/run-dev-win.sh
@@ -53,22 +101,46 @@ if ! command -v cl.exe >/dev/null 2>&1; then
# file, then have cmd execute the file. Avoids inner quoting entirely.
vcvars_launcher="$(mktemp --suffix=.bat)"
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[minor] xargs pipeline is fragile, sed is simpler

xargs -I{} basename {} works today but is heavier than needed. A sed replacement avoids the xargs dependency and argument-passing edge cases:

sdk_version="$(ls -d "$sdk_root_unix"/Lib/*/ 2>/dev/null \\
  | sort -V | tail -n1 \\
  | sed 's|.*/||; s|/||g')"

Comment thread app/src-tauri/src/lib.rs
// which is what actually invokes `CefBrowserHost::SetFocus(true)`.
let webview: &tauri::Webview<AppRuntime> = window.as_ref();
if let Err(err) = webview.set_focus() {
log::warn!(
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[nitpick] The reference to cef_impl.rs line ~2081 will drift as the vendor evolves. Consider referencing by message name instead: cef_impl.rsWebviewMessage::SetFocus handler.

- `run-dev-win.sh`: cmd.exe-not-found path was a silent no-op that
  skipped the entire Windows-PATH restoration block — contributors
  hitting "node/cargo not found" downstream had no log trail pointing
  here. Add WARNING stderr logs to all three failure branches
  (cmd.exe missing, query returned empty, no entries after conversion)
  so the downstream symptom is traceable to its actual cause.

- `lib.rs`: replace `cef_impl.rs line ~2081` reference with a
  message-name reference (`WebviewMessage::SetFocus` handler) so the
  comment doesn't drift as the vendor file evolves.

Skipping the minor `xargs/basename → sed` nit (SC2012 lint area also
flagged by CodeRabbit as "Low value" — Windows SDK dirs are strictly
`10.0.x.0` so the practical risk is negligible).

Focus-cycle Windows gate (graycyrus's other [major] comment) already
landed in ca79b68.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
coderabbitai[bot]
coderabbitai Bot previously approved these changes May 12, 2026
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Previous [minor] finding on the xargs pipeline was not addressed in the follow-up commits — re-raising for visibility since the other 3 items were picked up. Not blocking.

Comment thread scripts/run-dev-win.sh
sdk_root_win="$(cygpath -w "$sdk_root_unix")"
export WindowsSdkDir="${sdk_root_win}\\"
export WindowsSDKVersion="${sdk_version}\\"
sdk_lib_um="${sdk_root_win}\\Lib\\${sdk_version}\\um\\x64"
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[minor] xargs pipeline — still unaddressed from prior review

xargs -I{} basename {} works but is heavier than needed and has edge-case fragility with argument passing. A sed replacement is simpler and avoids the xargs dependency:

sdk_version="$(ls -d "$sdk_root_unix"/Lib/*/ 2>/dev/null \
  | sort -V | tail -n1 \
  | sed 's|.*/||; s|/||g')"

Not blocking — just a cleanup suggestion.

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Acknowledged — leaving as-is for this PR. Rationale + scope so it's a deliberate skip, not an oversight:

Why skipped

  • ls -d "$sdk_root_unix"/Lib/*/ only enumerates dirs matching 10.0.x.0 (Windows SDK's strictly-formatted version directory layout under C:\Program Files (x86)\Windows Kits�\Lib). No newlines, no shell metacharacters, no whitespace in entries — the cases SC2012 protects against don't materialize here.
  • CodeRabbit also flagged the same area and self-tagged it 💤 Low value.
  • This is dev-environment scaffolding pulled in from openhuman-1475; the rest of that file has the same ls | sort -V | tail idiom in other places (e.g. the nvm version pick at line ~417). Consistency over one-spot lint compliance until the whole file gets a shellcheck sweep.

Scope if we did apply

One site, three lines diff:

-    sdk_version="$(ls -d "$sdk_root_unix"/Lib/*/ 2>/dev/null \n-      | sort -V | tail -n1 \n-      | xargs -I{} basename {})"
+    sdk_version="$(ls -d "$sdk_root_unix"/Lib/*/ 2>/dev/null \n+      | sort -V | tail -n1 \n+      | sed 's|.*/||; s|/||g')"

Zero behavioral change for any valid Windows SDK install. Removes the xargs dependency (always present on Git Bash anyway) and the -I{} substitution. Output unchanged.

Happy to apply if you'd rather we land it now — it's a one-line edit. Just didn't want to expand the diff for a SC2012 lint when the path is hardcoded under a Microsoft-controlled directory tree.

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Applied in 47abaa37 — went ahead with the swap since it was the 30-second edit and removes one minor item from the review board.

Address graycyrus's repeated minor flag on the SDK-version-pick line.
Behavior unchanged: still picks the highest-version `10.0.x.0` dir
under `Windows Kits/10/Lib`, just trims the trailing slash and prefix
via sed instead of piping into `xargs -I{} basename {}`.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@scripts/run-dev-win.sh`:
- Around line 533-539: The current conditional guard that only checks
"$CEF_STAGE_DIR/libcef.dll" causes staging to be skipped when other CEF assets
changed; remove the if/then/else guard and always run the incremental sync:
unconditionally echo the staging message, run cp -ru "$CEF_RUNTIME_PATH"/.
"$CEF_STAGE_DIR"/ to copy updated files, and echo completion; reference the
symbols CEF_STAGE_DIR, libcef.dll, CEF_RUNTIME_PATH and the cp -ru call when
locating the code to change.
🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

  • Push a commit to this branch (recommended)
  • Create a new PR with the fixes

ℹ️ Review info
⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 08b3f433-f06a-406c-a7b9-267b8ce2404e

📥 Commits

Reviewing files that changed from the base of the PR and between 100b50f and 47abaa3.

📒 Files selected for processing (1)
  • scripts/run-dev-win.sh

Comment thread scripts/run-dev-win.sh
@sanil-23
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CI note — hanging Rust Core Tests + Quality is pre-existing breakage on main, not this PR

15/17 CI checks pass. The 2 still-pending checks (Rust Core Tests + Quality and Rust Core Coverage) are hanging in openhuman::agent::triage::evaluator::tests:

  • cloud_5xx_falls_through_to_local_fallback
  • cloud_then_local_failure_returns_deferred
  • double_429_falls_through_to_local_fallback
  • fatal_cloud_error_short_circuits_without_local_attempt

This PR doesn't touch any of these files or their dependencies — the diff is app/src-tauri/src/lib.rs + scripts/run-dev-win.sh. The hang is reproducible on main itself.

Timing evidence

When Commit Result
07:22 UTC 3db3b929 (this PR's base) ✅ Test workflow green in 6m11s
07:31 UTC 8b4350eafix(auth): stop 401 cascade after session expiry (OPENHUMAN-TAURI-1T) (#1516) (merged to main)
09:25 UTC chore(staging): v0.53.29 ❌ Test workflow cancelled
09:31 UTC 8b4350ea re-run ❌ Test workflow cancelled
09:59 UTC chore: add sentry_bugs to gitignore (#1525) ⏳ Test workflow in_progress for 1h31m+ as of writing

The Sentry-bugs gitignore commit doesn't touch Rust at all — yet its tests are hung in the same way. That rules out per-PR causes.

Likely culprit

PR #1516 touched the run-turn provider path (src/openhuman/providers/ops.rs) and introduced a new credentials event bus (src/openhuman/credentials/bus.rs, src/core/event_bus/events_tests.rs). The triage evaluator tests use mock_agent_run_turn which routes through the same provider plumbing. The tests probably now block on a global credentials-bus subscriber the test harness doesn't wire up — classic post-refactor test-deadlock pattern when global state is introduced behind an existing mock surface.

Not investigating in this PR — out of scope. Flagging here so the reviewer doesn't attribute the red box to the CEF focus fix.

What I'm doing

  • Leaving this PR's pending jobs to time out naturally rather than force-cancelling.
  • Happy to retry CI once the underlying hang is fixed on main.
  • Can also rebase onto a post-fix main if that's faster than waiting for a rerun.

cc / fyi reviewer.

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