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orca/AGENTS.md
Neil 057fbfcffc perf(windows): read the process table natively instead of forking PowerShell (#15749)
* perf(windows): read the process table natively instead of forking PowerShell

Seven independent readers each forked powershell.exe to run
Get-CimInstance Win32_Process, with a wmic fallback that Windows 11 24H2
has removed. On a domain-joined host with PowerShell Transcription
enabled by policy, one of them running every ~2s recorded ~289GB across
1.4 million files (#15209). The same scan cost ~700ms and ran per pane
(#15036), and a Group Policy or AV block turned it into 'unavailable',
which callers read as 'no evidence' -- which is how a PTY tree survives
its own teardown (#9045, #10475).

A Toolhelp32 snapshot answers the same question with no child process.
Measured on Windows 11 with 1050 processes, p50/p95:

  pid+ppid+name          15.9 / 17.5 ms
  +memory +command line  30.6 / 33.7 ms
  Get-CimInstance         706 / 723  ms

Two upstream defects needed patching, both found by running it on real
hardware. The binding requires Spectre-mitigated libraries our agents do
not carry (node-pty is patched the same way). And enumeration stopped
after 1024 processes: on a host with 1051 the module returned exactly
1024, and the querying process was itself among the 27 missing -- a
truncated snapshot silently hides the descendants teardown is looking
for, which is the failure this whole change exists to remove.

Migrated: the foreground/descendant reader (the #15209 scraper and the
teardown identity gate) and the port scanner's PID attribution. NOT
migrated: the memory collector and three identity probes, which need
Win32_Process.CreationDate and have no native equivalent. Start time is
a proxy for identity anyway; an inherited job handle is the real answer,
so those belong with the job-object work rather than here.

Packaging follows the windows-native-registry contract exactly:
optional, absent from onlyBuiltDependencies so macOS/Linux never run
node-gyp, win32-only in the packaged runtime. Asserted by the existing
contract test, which also stops pinning a whole source literal that only
tested its own formatting.

* chore(process): ratchet the child_process allowlist down

windows-foreground-process-rows.ts no longer spawns anything, so its
allowlist line is stale. The guard fails on a stale entry as well as a
new one, precisely so a migrated file cannot keep a slot open and hide
the next regression in the same path.

* fix(ports): import the process-table reader the scanner uses

Missing import: the migration replaced the PowerShell call but the new
symbol was never imported, so tsc failed. Vitest transpiles without
typechecking, which is why the port-scanner suite stayed green.

* fix(deps): sync this branch's lockfile with its patch set

Same class as the fix on the tip branch: pnpm records a hash per patched
dependency, and this branch introduces the windows-process-tree patch
without its lockfile entry matching. Every job here failed at install
with ERR_PNPM_LOCKFILE_CONFIG_MISMATCH.

Verified with --frozen-lockfile, which is what CI runs and what my local
runs were not.

* test(relay): drive the relay's Windows fixtures from the native snapshot

Two relay cases fed a PowerShell CIM payload through a mocked execFile.
That reader is gone, so both failed -- deterministically, on every PR
run for this branch and the one above it.

I did not catch it because my own verification sweep was
'src/main src/shared config/scripts' and never included src/relay. The
relay is a first-class consumer of the process table; leaving it out of
the sweep is how a deterministic failure survived six review rounds.
2026-08-21 21:54:57 -07:00

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Markdown

# Design System
All UI work — layout, color, typography, spacing, component selection, UX behavior — must follow [`docs/STYLEGUIDE.md`](./docs/STYLEGUIDE.md). Use the tokens defined in `src/renderer/src/assets/main.css` (the canonical source) and the shadcn primitives in `src/renderer/src/components/ui/`. Don't invent new color values, font sizes, or shadow tiers when a documented one already covers the role. When STYLEGUIDE.md is silent, follow the resolution order in its final section.
## Electron UI Validation
Use the `$electron` skill and Playwright CDP for rendered Orca UI checks. Do not use computer-use for Orca UI validation.
# Style
## Concise/Brief Non-obviosu comments ONLY
* DO NOT: be verbose, explain the obvious, walk through the code ("WHY not HOW")
* BE CONCISE. 1 LINE if possible
## Lint Rules: Do Not Disable Max Lines
NEVER add a `max-lines` disable (`eslint-disable max-lines`, `oxlint-disable max-lines`, or line-specific variants), and never add a per-file `max-lines` bump in `mobile/.oxlintrc.json`.
## File and Module Naming
Never use vague names like `helpers`, `utils`, `common`, `misc`, or `shared-stuff` for files, folders, or modules. They carry zero info and tend to become dumping grounds. Name files after what they _actually_ contain — prefer the concrete domain concept (e.g. `tab-group-state.ts`, `terminal-orphan-cleanup.ts`) over the generic role (`tabs-helpers.ts`, `terminal-utils.ts`). If you find yourself reaching for `helpers`, the file probably has more than one responsibility and should be split, or there's a better name hiding in the code that describes what the functions operate on.
## Type Declarations: Prefer `.ts` Over `.d.ts`
# Considerations
## Worktree Safety
Always use the primary working directory (the worktree) for all file reads and edits. Never follow absolute paths from subagent results that point to the main repo.
## Cross-Platform Support
Orca targets macOS, Linux, and Windows. Keep all platform-dependent behavior behind runtime checks:
- **Keyboard shortcuts**: Never hardcode `e.metaKey`. Use a platform check (`navigator.userAgent.includes('Mac')`) to pick `metaKey` on Mac and `ctrlKey` on Linux/Windows. Electron menu accelerators should use `CmdOrCtrl`.
- **Shortcut labels in UI**: Display `⌘` / `⇧` on Mac and `Ctrl+` / `Shift+` on other platforms.
- **File paths**: Use `path.join` or Electron/Node path utilities — never assume `/` or `\`.
- **Windows setup scripts**: the setup/issue-command runner is a `.cmd` batch file unless the script starts with a `#!` line — never derive that from the user's terminal-shell preference, and never launch a `.cmd` runner with a bare `cmd.exe /c` from a Git Bash pane (MSYS rewrites the `/c`). See [`docs/reference/windows-setup-shell.md`](./docs/reference/windows-setup-shell.md).
- **Windows child processes**: start them through `runProcess`/`spawnProcess` in `src/shared/child-process/` — never `child_process` directly. It pins `windowsHide`, refuses `shell: true`, and encodes `.cmd`/`.bat` arguments so neither `CommandLineToArgvW` nor `cmd.exe` mangles them. A ratchet test fails on any new direct import.
- **Windows process enumeration**: read the table through `src/main/windows/windows-process-table.ts`, never by forking `powershell.exe`. See [`docs/reference/windows-process-enumeration.md`](./docs/reference/windows-process-enumeration.md).
- **WSL commands**: build argv with `buildWslExecArgs` (always `--exec` — under `--`, `wsl.exe` expands `$name` in every argument and silently rewrites the script), and fence anything whose stdout you parse with `buildWslCapturedLoginShellCommand`, because the interactive login shell prints the distro banner to stdout. See [`docs/reference/wsl-command-execution.md`](./docs/reference/wsl-command-execution.md).
- **Linux native modules**: keep the glibc floor at Ubuntu 20.04 / glibc 2.31. A module compiled from source on a newer runner can reference symbol versions absent on the floor and crash the app on startup. See [`docs/reference/linux-glibc-compatibility.md`](./docs/reference/linux-glibc-compatibility.md); packaging fails if a bundled native binary needs newer glibc.
## SSH Use Case
All changes must consider the SSH use case. Don't assume local-only execution. Before changing anything that reports on, stops, or lists remote work, follow [`docs/reference/ssh-execution-boundary.md`](./docs/reference/ssh-execution-boundary.md): the execution host owns everything that touches execution, and loss of contact is never evidence of process death — the verdict vocabulary is `live` / `unverifiable` / `exited`, with no synonyms.
## Folder Workspace Use Case
All changes must consider folder workspaces as well as git worktrees. Don't assume every workspace is a git worktree.
## Remote Wire Compatibility
Clients and remote Orca servers update independently, so mixed versions are the normal state. Before changing anything a paired client and host exchange — RPC params, stream frames, or the content either side publishes over them — follow [`docs/reference/remote-wire-compatibility.md`](./docs/reference/remote-wire-compatibility.md). A new optional field is safe; a new stream opcode must be capability-negotiated because decoders drop unknown opcodes silently; and changing what the host publishes reaches old clients even with no wire change.
## Git Binary Compatibility
Orca runs the user's Git binary on native, WSL, and SSH hosts, which may all have different versions. Treat Git 2.25 as the core-workflow baseline and follow [`docs/reference/git-compatibility.md`](./docs/reference/git-compatibility.md).
When adding or changing a Git command:
- Check when every subcommand and option was introduced. For newer behavior, keep a baseline-compatible fallback or degrade safely.
- Use `GitCapabilityCache` with a narrow unsupported-error predicate so recurring operations do not retry a known-invalid command. Do not rely only on `git --version`; wrappers such as `simple-git` do not remove host-version differences.
- Scope capability state to the host that executes Git: native, WSL distro, SSH provider, or relay connection. Cover the first fallback, later cached calls, concurrent probes, and relevant host isolation in tests.
- Keep the real-binary compatibility contract in PR CI current. When adopting a newer Git feature, add its version boundary so the preferred command and fallback both run against representative Git releases.
- Preserve commands that begin with global Git options such as `-c` before the subcommand, including auto-maintenance suppression used by worktree-create fetches.
## Git Provider Compatibility
Source-control and review changes must consider GitLab and other supported git providers, not only GitHub. Keep provider-specific behavior behind explicit checks, and avoid GitHub-only naming for generic review concepts.
## GitHub CLI Usage
Be mindful of the user's `gh` CLI API rate limit — batch requests where possible and avoid unnecessary calls. All code, commands, and scripts must be compatible with macOS, Linux, and Windows.