Neil
dc3aa36ad3
The orphan-relay-PTY sweep authorizes `pty.shutdown { immediate: true }`, which
runs `forceKillPosixPtyProcessGroups`: collect every process group on the pane's
tty, then `killpg` each one. The blast radius is therefore (groups on the tty) x
(members of those groups, wherever they are). The idleness evidence measured only
the first factor, so three shapes read as idle and were SIGKILLed:
- with job control off (`set +m`) a background job keeps the SHELL's pgid, so the
tty carries exactly one process group and that group is running the user's build;
- a child that drops the controlling terminal (`ioctl(TIOCNOTTY)` without `setsid`)
keeps the pgid, reports `tpgid == -1`, and never appears in `ps -t <tty>`;
- a double-forked grandchild keeps the pgid and tty but reparents to pid 1, so the
`ppid` walk cannot reach it and the named-process backstop never fires.
`shellOwnsEveryTtyProcessGroup` now also requires the shell's own process group to
hold no other member anywhere in the table, indexed in the same single pass. A
pids-per-tty set would catch the first and third but not the second, which is why
the count is pgid-wide rather than tty-scoped. The wire field keeps its tty-shaped
name: the value only ever became stricter, so an old client skips more, never less.
Second, unrelated-in-mechanism but same file family: `foregroundSkipReason` summed
`capturedAgeMs + evidenceAgeSinceListingMs` without validating either. A non-numeric
`capturedAgeMs` makes the sum `NaN`, and `NaN > 5000` is false, so a malformed record
PASSED the freshness gate and proceeded toward the stop — the one place in the file
that defaulted toward kill. Nothing validated it on this path
(`mapSshPtyProcessList` checks the ownership fields and spreads the rest through;
`PtyProcessListAdmission` is not on the sweep path). It now runs
`isForegroundProcessEvidence` and fails closed.
Verified on real Linux, not only in mocks: a container drives `bash -i` on a real
pty, builds each construction, runs the real publisher and planner, and then calls
the real `forceKillPosixPtyProcessGroups`. Before, all three published
`shellOwnsEveryTtyProcessGroup: true`, planned SWEEP, and the planted pid was gone
after the signal. After, all three skip and survive, and an idle shell is still
reclaimed.
Residuals are written down at the predicate and in ssh-execution-boundary.md: the
capture is a snapshot (bounded by the evidence-age budget, not removed), and a
process the host's own `ps` cannot enumerate stays unobservable while `killpg`
still reaches it.
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
Mobile CompanionMonitor and steer your agents from your phone — get notified when an agent finishes and send follow-ups from anywhere. |
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Parallel WorktreesFan one prompt across five agents, each in its own isolated git worktree — compare the results and merge the winner. |
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Terminal SplitsGhostty-class terminals with WebGL rendering, infinite splits, and scrollback that survives restarts. |
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Design ModeClick any UI element in a real Chromium window to send its HTML, CSS, and a cropped screenshot straight into your agent's prompt. |
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GitHub & Linear, NativeBrowse PRs, issues, and project boards in-app — open a worktree from any task and review without a context switch. |
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SSH WorktreesRun agents on a beefy remote box with full file editing, git, and terminals — auto-reconnect and port forwarding included. |
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Annotate AI DiffsDrop comments on any diff line and ship them back to the agent — review, edit, and commit without leaving Orca. |
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Drag Files to AgentsVS Code's editor with autosave everywhere — drag files or images straight into an agent prompt. |
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Orca CLIAgents drive Orca too — script every workflow with |
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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.
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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.