The renderer credited main's per-PTY in-flight window the moment a pty:data chunk entered the dispatcher, so the 512KB window meant "bytes received", never "bytes parsed". Under flood the renderer write queue grew unbounded behind instant ACKs; main saw no backpressure, crossed the pending cap, and bulk-dropped output (rc.7.perf DSR timeouts). Crediting is now parse-deferred: each delivery carries a fire-once credit (deliverPtyDataWithDeferredAck); the pane's first scheduler write claims it (writeTerminalOutput.ackCredit) and the output scheduler fires it when the bytes are consumed — after terminal.write in the parse-clocked drain, or on ANY discard path (backlog cap replacement, discardTerminalOutput, disposed-terminal drops, flush recovery). Deliveries that never reach the scheduler (reconcile drops, restore queueing, pre-mount eager buffer) settle at handler return, so the invariant holds: every delivered chunk credits exactly once, parsed or discarded. E2E ack-gate hold/release and delivery-resync semantics are unchanged (all crediting still routes through ackPtyData). Main-side equilibrium: with ACKs at parse cadence, in-flight becomes true backpressure — pendingData stays near the 256KB producer-pause watermark, far under the >=2MB drop cap, so bulk floods block the shell (node-pty pause) instead of dropping. Co-authored-by: Orca <help@stably.ai>
Orca
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 0.0.21
Community & Support
-
Discord: Join the community on Discord.
-
Twitter / X: Follow @orca_build for updates and announcements.
-
WeChat: Scan the QR code to join the community.
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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.
License
Orca is free and open source under the MIT License.









