Brennan Benson 04ac6d6cb2 Hold messages in the host until a chat's agent has finished starting (#26416)
* feat(native-chat): host-owned startup attempt and hold-and-deliver barrier

The host now mints one startup attempt before any adapter acquires (lease
identity, spawn token, pinned launch context, cancellation, a 60 s deadline
from the mint that activity never renews, option intent, and the event and
child-work sinks), and the shared delivery loop hands nothing to a child
still proving its start. A send is still accepted and journaled at once;
readiness (the normalized `started` settlement) wakes delivery, which
re-checks the child, fence, close and Stop before handover. A start that
fails, crashes, or misses its deadline leaves held messages definitely
unsent; a dispatch that throws after handover is `unknown`, never inferred
unsent from the child's phase.

* fix(native-chat): time agent starts from spawn by progress, and release Claude on initialize

Review round 1 on the host-owned startup attempt.

- The startup clock now starts when the process exists and fails a start
  only after 60 s with no stdout frame or stderr line, or 10 minutes after
  spawn however chatty it is. Every agent's child reports output through
  the one managed-process spawn, so a slow migration or history replay is
  no longer killed mid-way. Each start's spawn-to-outcome time is recorded
  as an `agentSession.startup` span for tuning.
- Claude reports `started` on its initialize answer; the settings read
  follows and is applied and persisted as a later `options-reported`
  update, so messages no longer wait on it.
- A started child's reported options are persisted in their own step after
  the held messages are handed over, and only if no pick changed the
  record's options since.
- An attempt now ends whenever its child ends or an expiry stopped it.
- Removed `optionsAsOf`, which was not an option revision, and comments
  that described the old publish-and-write-at-once behaviour.

* fix(native-chat): keep the startup attempt's contract free of host and process code

The adapter contract imported the attempt type from the module that also runs
its clock and imports the host types, which pulled the model catalog and
process-scan code into the mobile test typecheck. The attempt's shape and limits
now live in a dependency-free contract module.

* fix(native-chat): never let a stale option report undo a later pick

A report of the child's options is now persisted only if no pick, no
model-not-found heal and no newer report reached the chat since its read
began. The host keeps one option revision per chat; the startup attempt
hands the adapter a reader for it, and each report carries the revision
it was read at. This replaces the record-snapshot check `started` had and
covers the settings report, which had none, so a settings read answered
just after a pick can no longer write the older model back.

Also: the option read a ready child does inside its start now ends with
the start (limit, Stop or close); a start that turns ready as the limit
fires is recorded as ready; the startup-attempt host tests run under the
Node SQLite runtime; and the retired-model test follows the new startup
order.

* fix(native-chat): require the option revision and order reports by arrival

The host can no longer mint a startup attempt without the conversation's
option revision, so no host path can stamp a report at a stale zero and
drop every report after the first pick. Adapter tests may still omit it.

A report is now dropped only when a pick or a value the child showed it
cannot run came after its read. Reports are ordered among themselves by
when the host takes them, and only the newest admitted one is persisted.
The settings read's stamp therefore holds however late the host takes
the start's report, instead of relying on that report being handled
synchronously before the read begins.

Tests: a settings read stamped before the host took the start's report is
kept; a report read after a failed pick is persisted; the minted attempt's
revision reader answers the host's current revision.
2026-10-08 11:57:51 -07:00
2026-10-08 18:35:36 +00:00
2026-05-04 20:42:03 -07:00
2026-03-16 22:27:51 -07:00
2026-03-28 10:19:14 -07:00

Orca 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

Orca desktop app running agents in parallel worktrees, with the Orca mobile companion app in the corner

Features

Mobile Companion

Monitor and steer your agents from your phone — get notified when an agent finishes and send follow-ups from anywhere.

iOS App Store · Android APK 0.0.52 · Docs →

Orca desktop with the mobile companion app

Parallel Worktrees

Fan one prompt across five agents, each in its own isolated git worktree — compare the results and merge the winner.

Docs →

Parallel worktree orchestration

Terminal Splits

Ghostty-class terminals with WebGL rendering, infinite splits, and scrollback that survives restarts.

Docs →

Terminal splits

Design Mode

Click any UI element in a real Chromium window to send its HTML, CSS, and a cropped screenshot straight into your agent's prompt.

Docs →

Embedded browser and Design Mode

GitHub & Linear, Native

Browse PRs, issues, and project boards in-app — open a worktree from any task and review without a context switch.

Docs →

GitHub and Linear task workflows in Orca

SSH Worktrees

Run agents on a beefy remote box with full file editing, git, and terminals — auto-reconnect and port forwarding included.

Docs →

Remote worktrees over SSH

Annotate AI Diffs

Drop comments on any diff line and ship them back to the agent — review, edit, and commit without leaving Orca.

Docs →

Annotate AI-generated diffs

Drag Files to Agents

VS Code's editor with autosave everywhere — drag files or images straight into an agent prompt.

Docs →

Drag files and images into an agent prompt

Orca CLI

Agents drive Orca too — script every workflow with orca worktree create, snapshot, click, and fill.

Docs →

Script Orca from the CLI

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 logo Claude Code   Codex logo Codex   Grok logo Grok   Cursor logo Cursor   GitHub Copilot logo GitHub Copilot   Muse logo Muse   DeepSeek Harness logo DeepSeek Harness   ZCode logo ZCode   OpenCode logo OpenCode   MiMo Code logo MiMo Code   Amp logo Amp   OpenClaude logo OpenClaude   Antigravity logo Antigravity   Pi logo Pi   oh-my-pi logo oh-my-pi   Hermes Agent logo Hermes Agent   Devin logo Devin   Goose logo Goose   Auggie logo Auggie   Autohand Code logo Autohand Code   Charm logo Charm   Cline logo Cline   CodeBuddy logo CodeBuddy   Codebuff logo Codebuff   Freebuff logo Freebuff   Command Code logo Command Code   Continue logo Continue   Droid logo Droid   Kilocode logo Kilocode   Kimi logo Kimi   Kiro logo Kiro   Mistral Vibe logo Mistral Vibe   Qwen Code logo Qwen Code   Rovo Dev logo Rovo Dev   + any CLI agent


Install

Desktop — macOS, Windows, Linux

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.


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 11.

    WeChat group 11 QR code for the Orca community
  • 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.

Orca contributors

GitHub star history chart for stablyai/orca

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.

S
Description
Orca is the ADE for working with a fleet of parallel agents. Run any coding agent with your own subscription. Available on desktop, mobile and remote runtime.
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