`attachStablePaneOwner` was the last reader that synthesised a runtime exit from a reattach refusal, and it published code `0` — which `orca-runtime-on-pty-exit` records as `rememberPtyLivenessVerdict(exited)`, a death certificate whose only legitimate writer is a host-delivered exit frame. The refusal it acted on is a union. `pty.attach` answers `PTY "<id>" not found` both for a pid the relay probed with `isProcessAlive` and for an id its session map simply never had — which, because ids carry a per-start mint epoch, is every id minted before a relay restart, checked against nothing. So a relay restart plus a reconnect certified a shell that was still running under the old daemon's orphaned process tree, retired the pane binding, and cold-started a second agent onto the same transcript. The sibling `handlePtyReattachFailure` has always refused to certify from that union; this path did not. - The relay marks the one refusal it backed with a liveness check (`PTY_ATTACH_PROVEN_EXITED_MARKER`). The marker is additive, so an unmarked answer — including an older relay's — stays ambiguous, which is the safe direction. - The client mints that half as `SshPtyProvenExitedOnRelayError`, a subclass so every existing `isSshPtyAbsentFromRelayError` consumer is unchanged. - Pane adoption publishes `UNVERIFIED_PROCESS_EXIT_CODE` (-1), the sentinel its sibling publishes, and passes `hostExitConfirmed` only for evidence that observed the process: the marked relay refusal, or `SessionNotFoundError` from the registry that owns the PTY. The ambiguous half now records `unverifiable` instead of `exited`. - The gone-branch keys on the error type rather than the bare `PTY ".+" not found` text, so an untyped string can no longer authorise abandoning a binding — the discriminator `pty-connect-limits.ts` already documented. Refs docs/reference/ssh-execution-boundary.md
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 0.0.47 · Install guide
Community & Support
-
Discord: Join the community on Discord.
-
Twitter / X: Follow @orca_build for updates and announcements.
-
WeChat: Scan to join the Orca community WeChat group 8.
-
Feedback & Ideas: We ship fast. Missing something? Request a new feature.
-
Privacy: See the privacy & telemetry docs for what anonymous usage data Orca collects and how to opt out.
-
Show Support: Star this repo to follow along with our daily ships.
Developing
Want to contribute or run locally? See our CONTRIBUTING.md guide.
The relay that pairs the mobile app with a desktop host is also in this repository under
cloud/, with a separate pnpm workspace and setup 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.










