Brennan BensonandMerge Sim
1798786d4e
* refactor(native-chat): share one row-content derivation between row and list Windowing needs the list and the row to agree on which messages draw nothing: a row the list counts but the row declines to render would reserve estimated height for an empty slot. Extracts the block derivation out of NativeChatMessageRow into a module cached on the block array, so a streaming turn pays for it once per revision rather than once per consumer. * refactor(native-chat): keep an opened tool run open past its row's lifetime A tool run, tool line or diff card the reader opened is state they created, but it lives in the component's own `useState`. That is fine while every row is mounted forever. It stops being fine the moment rows can be unmounted: the run silently re-collapses behind the reader's back. Rows now read their disclosure from a transcript-level map when one is provided and fall back to their own state when they are rendered standalone. The controls that re-sync a run — the toolbar's expand-all, a turn's disclosure, a diff reveal — are folded into the key the choice is remembered under, so a control flip reads as "nothing recorded yet" and the new default stands without a mid-render write to a map an ancestor owns. `ToolLine` moves to its own file; the run was over the line cap with it. * perf(native-chat): mount only the transcript rows near the viewport A settled transcript mounts every row it has ever loaded, so the cost of opening a conversation grows with its length even though only a screenful is legible. Rows near the viewport are now the only ones in the document; the rest are reserved as estimated height and measured when they arrive. Four things had to change for that to be safe: - `zoom` moves from the transcript column onto the scroll container. Item measurements are in the zoomed content's pixels while `scrollTop` is not, so with the two split across the boundary the window's arithmetic was off by exactly the font scale — correct at the top of a transcript and blank deep inside it. The column's padding moves to a new inner element to keep the layout it had. This does mean the scrollbar itself zooms with the text. - The three siblings that made up a row — the message, the turn status, the turn's diff rollup — move into one wrapper that carries the spacing they used to take from the column. The spacing between rows is the window's `gap`, never the height estimate, which would otherwise be counted twice. - Messages that draw nothing no longer take a slot. Counted but undrawn, each one would reserve estimated height for a row that never appears. - Paging in older history is driven by scroll events alone. Every row that resolves its real height moves the content and re-fires the size observers, so the old "am I near the top?" test would have asked for another page once per measurement. It now also requires the view to have moved upwards and requires new items since the last request. Anchoring is the virtualizer's: `anchorTo: 'end'` re-resolves the row at the current offset across a count change, which replaces the hand-rolled prepend anchor, and `followOnAppend` keeps a reader at the bottom pinned there. The document-level bottom pin stays, because the typing indicator, the activity line and the column's end padding all live past the last row. Revealing a diff from a turn rollup can target a row that isn't mounted, so that row is pinned into the window and the card still reports its own position — a turn that touched four files lands on the one that was asked for. * fix(native-chat): let a pinned row reach the mounted window Two faults the windowing tests turned up, plus the handles they needed. The virtualizer memoizes its mounted index list on the range extractor's identity. Holding that identity stable — which is right for the measurement memo, and was the reason it was written that way — meant a row pinned after the fact was never picked up: revealing a diff in a row the window had left behind pointed at a row that stayed unmounted. The extractor now changes identity with the pinned set, which is not a dependency of the measurement memo, so nothing expensive is rebuilt. The offset a row sits at is read off the `offsetParent` chain, with a rect-based fallback for the case where there is none. Using that fallback for the window's own scroll margin was wrong in kind: with no layout to measure, it returns the scroll position itself, so the margin tracked the offset and the window sat at the top of the transcript wherever the reader scrolled. The margin now takes the offset chain or nothing; the fallback stays where it belongs, on the reveal. The scroll root and the window's spacer are named, so measurement can find the scroll root without depending on which utility class makes it scroll, and so a test can tell a window from a whole transcript. * test(native-chat): cover the windowed transcript, and prove the window engaged The integration harness stubs `offsetHeight` — on the scroll root and on every row — because that is what the virtualizer measures with, and a DOM without layout answers zero to all of it. Rows report the height their own estimate predicted, which keeps the reserved totals exact no matter which rows have been mounted long enough to be measured. Every case reads the window through one helper that refuses to pass when there is no window. Without that, raising the usability gate would send all of them down the whole-transcript path, where "fewer rows mounted than messages" is false but every other assertion still holds — and they would go on reporting green while covering nothing. Reserved height is asserted as an exact total rather than "greater than zero", which a degenerate empty window also satisfies, and the mounted range is asserted to bracket the offset rather than merely to be smaller than the transcript. Covered: the window mounts a subset and moves with the reader; the newest row and a reveal's target stay mounted from outside it; an opened tool run is still open when its row comes back; a message that draws nothing takes no slot; and the scroll root with no usable height still renders every row as a direct child of the transcript column. What the environment cannot show is stated where it matters rather than faked: its ResizeObserver never fires and a scroll assignment emits no event, so measurement settling, the bottom pin under a streaming turn, prepend anchoring and smooth scrolling are covered as pure decisions — height estimation, the pinned set, range extraction, and whether a position should page in older history — and left to a real renderer as behaviour. * docs(native-chat): say that one offset path does read rects * test(native-chat): pin the window against a row that grows in place Whole-message appends were covered; a row being replaced by a taller version of itself — what a streaming reply is — was not. The existing windowing harness gains two things it needs to see that: a scroll root with a real document (a height, a viewport, and a scrollTop that clamps), and a resize observer that delivers when a target's height actually changed, since happy-dom's never fires and nothing re-measures without it. Frame by frame, while one row grows from 24px to 6358px: the view stays 0px from the bottom, the row stays mounted, and the reserved total tracks the measurement rather than the estimate. A reader who scrolls up mid growth keeps the exact offset they chose for the rest of it. * test(native-chat): guard history prepend anchoring * test(native-chat): strengthen prepend anchor contract * fix(native-chat): preserve provider tool call identity * fix(native-chat): harden transcript windowing lifecycle * test(native-chat): install virtualizer viewport for turn timing * fix(native-chat): reject blank tool call identities --------- Co-authored-by: Merge Sim <sim@local>
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 0.0.48 · Install guide
Community & Support
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Discord: Join the community on Discord.
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Twitter / X: Follow @orca_build for updates and announcements.
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WeChat: Scan to join the Orca community WeChat group 8. Group 8 may be full; if so, scan the Group 9 QR code instead.
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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.
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.