### System details

- Omarchy 4.0.0-1 (`omarchy version` → `4.0.0-1`, `/usr/share/omarchy/version` → `4.0.0.alpha`)
- Linux 7.1.8-arch1-3, AMD Ryzen 9 9900X, Radeon Graphics (amdgpu), ASUS TUF GAMING B650M-E WIFI
- `brave-origin-bin 1:1.93.136-1`, default browser (`xdg-settings get default-web-browser` → `brave-origin.desktop`)
- `yt-dlp 2026.07.04-1`, `jq`, `ffmpeg 2:9.0.1-1`, `mpv` all present

### What's wrong?

On Brave Origin, the **Download Video** extension (Alt+Shift+D) is completely inert. No download, no OSD, no notification, no error — nothing at all.

**Copy URL** (Alt+Shift+L) is broken by the same defect on the same machine, though I should be precise about the evidence: I reproduced the dead-shortcut symptom directly for Download Video, and diagnosed Copy URL from its host manifest `com.omarchy.copy_url.json` being equally absent from the profile. Since the native host is that extension's only route to the clipboard, it cannot function without it — but I fixed both at once and so never observed its broken state separately.

Both extensions *appear* correctly installed: they show in the toolbar, because `--load-extension` in `~/.config/brave-origin-flags.conf` is written correctly. Only the browser-side half is set up. The native messaging host half is missing, so `chrome.runtime.sendNativeMessage` fails, and since `background.js` deliberately swallows the error (`void chrome.runtime.lastError`) the failure is entirely silent.

This is not the same bug as #6816 (stale `extensions.commands` registration). There, the native host manifests were present and clicking the toolbar action worked — only the accelerator was dead. Here the manifests do not exist for this browser at all, so both the accelerator *and* the toolbar click do nothing.

### Root cause

`omarchy-install-chromium-ytdlp` and `omarchy-install-chromium-copy-url` write their host manifests into a hardcoded list of profile roots that has no Brave Origin entry:

```bash
browser_dirs=(
  "$HOME/.config/chromium"
  "$HOME/.config/google-chrome"
  "$HOME/.config/google-chrome-beta"
  "$HOME/.config/google-chrome-unstable"
  "$HOME/.config/BraveSoftware/Brave-Browser"
  "$HOME/.config/BraveSoftware/Brave-Browser-Beta"
  "$HOME/.config/BraveSoftware/Brave-Browser-Nightly"
  "$HOME/.config/microsoft-edge"
  "$HOME/.config/microsoft-edge-dev"
)
```

Brave Origin's user-data-dir is `~/.config/BraveSoftware/Brave-Origin` (Beta: `~/.config/BraveSoftware/Brave-Origin-Beta`, per #6879) — neither is in the list. Chromium resolves the user-level host directory as *user-data-dir* + `NativeMessagingHosts`, so it looks in a directory Omarchy never populates.

Nothing in the tree references Brave Origin's profile path:

```console
$ grep -rl 'BraveSoftware/Brave-Browser' /usr/bin/ /usr/share/omarchy/
/usr/bin/omarchy-install-chromium-copy-url
/usr/bin/omarchy-install-chromium-ytdlp
/usr/share/omarchy/migrations/1786643346.sh

$ grep -rl 'Brave-Origin' /usr/bin/ /usr/share/omarchy/
$            # no matches anywhere
```

Which is odd, because Brave Origin is otherwise first-class: it is menu-installable (`install.browser.brave-origin` in `omarchy-menu.jsonc`), selectable as default, and migration `1784510887.sh` auto-installs it while dropping Brave Origin Beta.

`omarchy-install-browser brave-origin` even calls both installers itself:

```bash
copy_chromium_flags() {
  mkdir -p ~/.config
  cp -f "$OMARCHY_PATH/config/chromium-flags.conf" "$1"
  omarchy-install-chromium-copy-url
  omarchy-install-chromium-ytdlp
}
```

so installing Brave Origin through Omarchy's own menu writes the flags (extensions load) and then writes the host manifests into nine directories, none of which is the browser it just installed. On this machine the effect is visible directly — the installers created the directory `~/.config/BraveSoftware/Brave-Browser/NativeMessagingHosts/` for a browser that is not installed, and populated it, while the real profile's own `NativeMessagingHosts/` sat empty:

```console
$ ls ~/.config/BraveSoftware/Brave-Browser/     # not installed
NativeMessagingHosts                            # com.omarchy.ytdlp.json, com.omarchy.copy_url.json

$ ls ~/.config/BraveSoftware/Brave-Origin/NativeMessagingHosts/   # actually in use
$                                                                  # empty
```

**Secondary instance of the same omission:** migration `1786643346.sh` (the #6816 Copy URL repair) carries its own `profile_roots` list — expanded to 13 entries including vivaldi, opera and helium — and *also* omits both Brave Origin paths. So that repair silently never runs on Omarchy's own default browser.

### Steps to reproduce

1. On Omarchy 4.0.0, install Brave Origin: Setup → Install → Browser → Brave Origin (or `omarchy-install-browser brave-origin`).
2. Make it the default browser and launch it.
3. Open any page with a video and press Alt+Shift+D (or click the Download Video toolbar icon).
4. Nothing happens. `ls ~/.config/BraveSoftware/Brave-Origin/NativeMessagingHosts/` is empty.

### Fix verified locally

Copying the manifests into the real profile root fixes both extensions immediately, with no browser restart — Chromium reads the host manifest from disk on every `sendNativeMessage` call:

```bash
cp ~/.config/BraveSoftware/Brave-Browser/NativeMessagingHosts/com.omarchy.*.json \
   ~/.config/BraveSoftware/Brave-Origin/NativeMessagingHosts/
```

Alt+Shift+D then downloads correctly: progress OSD, then the "Download complete" toast with thumbnail.

Confirmed the rest of the chain was already sound, so the manifest location is the only defect: the extension's pinned manifest `key` hashes to `dedjgknigfeelejglamclffonmophnfl`, exactly matching `allowed_origins` in `com.omarchy.ytdlp.json`, and driving `omarchy-chromium-ytdlp-host` with a hand-built native-messaging frame parses the URL and validates fine.

### Suggested resolution

- Add `$HOME/.config/BraveSoftware/Brave-Origin` and `$HOME/.config/BraveSoftware/Brave-Origin-Beta` to `browser_dirs` in both `omarchy-install-chromium-ytdlp` and `omarchy-install-chromium-copy-url`, and to `profile_roots` in migration `1786643346.sh`.
- A migration to backfill the manifests for users already on Brave Origin, since the installers only run on browser install/refresh — affected users otherwise stay broken until they happen to run `omarchy-refresh-chromium`.
- Worth factoring the profile-root list into one shared helper. It is currently duplicated across at least three files with three different contents, which is how Brave Origin came to be missing from all of them; #6476 was the same class of bug (migration writing to `brave-origin-beta` flags instead of `brave-origin`).

---

Filed by Claude Opus 5 via Claude Code, on behalf of the machine owner.