A synchronous fs syscall on the Electron main thread parks the whole app when its target is on a stalled mount (SMB/NFS, VPN drop, sleeping NAS, unmounted drive). The app stops repainting and stops answering Force Quit. This converts 28 such paths, covering the ones users actually hit: - orca.yaml hook config, read behind the POLLED git:status path, so a stalled repo froze the app on a timer with no user action - agent hook status/install for 14 agents, incl. the shared reader that 10 of them funnel through and a serial install loop with sync fs per body - credential status for Codex/Grok/MiniMax/speech, also called off-IPC by RateLimitService on a refresh timer -- froze a fully idle app - external path authorization and agent trust setup - profile index, keybindings, diagnostics discovery Measured first, since it shapes the fix: libuv's threadpool defaults to 4 threads, and at exactly poolSize concurrent stalled ops every other async fs call app-wide stops progressing. But the event loop stayed alive in all configurations (max timer gap 4ms). So async conversion does not bound a hung mount -- it keeps the main thread responsive, which is the reported symptom. UV_THREADPOOL_SIZE is raised to 16 as headroom, not as a bound. No timeout machinery was added; it cannot bound a block on its own thread. Where a sync twin had to stay (CLI processes, pre-window startup, callers that cannot await), the write path keeps single-thread serialization rather than relying on a promise chain a sync writer walks straight through: canonicalization moves off-thread while the read-modify-write stays sync. Where both twins must coexist, the async writer publishes its temp path and the sync writer unlinks it, turning the parked rename into a swallowed ENOENT -- a generation guard alone is spent once the writer parks. observability/local-file-sink.ts is deliberately untouched; its writeSync is a crash-durability contract that needs a process boundary, not an await.
Orca
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The AI Orchestrator for 100x builders.
Run Codex, ClaudeCode, OpenCode or Pi side-by-side — each in its own worktree, tracked in one place.
Download Orca
Features
Also in the box:
- Quick open — Search across worktrees, files, agents, commands, and repo context without leaving your flow.
- Account switcher & usage tracking — See Claude and Codex usage and rate-limit resets, and hot-swap accounts without re-logging in.
- Rich repo previews — Preview Markdown, images, PDFs, and repo docs in the workspace.
- Computer Use — Let agents operate desktop apps and visible UI when a workflow needs real interaction.
- Notifications and unread state — Know when an agent finishes or needs attention, then mark threads unread to come back later.
- And many, many more — we ship daily, so this list is perpetually behind. The changelog is the real feature list.
Supported Agents
Works with any CLI agent — if it runs in a terminal, it runs in Orca.
Claude Code
Codex
Grok
Cursor
GitHub Copilot
OpenCode
MiMo Code
Amp
OpenClaude
Antigravity
Pi
oh-my-pi
Hermes Agent
Devin
Goose
Auggie
Autohand Code
Charm
Cline
Codebuff
Command Code
Continue
Droid
Kilocode
Kimi
Kiro
Mistral Vibe
Qwen Code
Rovo Dev
+ any CLI agent
Install
Desktop — macOS, Windows, Linux
- Download from onOrca.dev
- Or grab a build directly: macOS Apple Silicon · macOS Intel · Windows (.exe) · Linux AppImage · All builds
- Running
orca serveon a headless Linux server? See the headless Linux server guide.
Or via a package manager:
# macOS (Homebrew)
brew install --cask stablyai/orca/orca
# Arch Linux (AUR) — or stably-orca-git to build from source
yay -S stably-orca-bin
Mobile Companion — iOS, Android
Pair with your desktop app to monitor and steer your agents from your phone.
- iOS: Download on the App Store or join TestFlight
- Android: Download APK 0.0.36
Community & Support
-
Discord: Join the community on Discord.
-
Twitter / X: Follow @orca_build for updates and announcements.
-
WeChat: If group 5 is full, you can join group 6.
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Feedback & Ideas: We ship fast. Missing something? Request a new feature.
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Privacy: See the privacy & telemetry docs for what anonymous usage data Orca collects and how to opt out.
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Show Support: Star this repo to follow along with our daily ships.
Developing
Want to contribute or run locally? See our CONTRIBUTING.md guide.
Signed Builds
Windows code signing sponored/provided by SignPath.io, certificate by SignPath Foundation.
License
Orca is free and open source under the MIT License.










