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Choose the right Interceptor surface. Use interceptor-browser for page DOM, network, browser tabs, rich editors, screenshots, and browser automation. Use interceptor-macos for native apps, browser chrome, URL bars, OS dialogs, cross-app routing, AX trees, native screenshots, Apple Events, trusted OS input, macOS Electron CDP/app web-content control, and in-process app runtime control. Use interceptor-ios for apps on an owned, unlocked, Developer-Mode iPhone. Use interceptor-research for deep mul
Passed 14 of 18 test cases with the skill, and 4 of 18 without it.
and 12 more in the full report
12 fixed5 passed either way5 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
This benchmark measured an earlier version of the skill.
One of 12 test cases the skill fixed. Same model, same prompt, with and without the skill.
I need to click a submit button on a secondary non-minimized browser window while maintaining my focus on my current terminal session. What subcommand flag ensures the click input is delivered without bringing the window to focus?
| Checked | Without skill | With skill |
|---|---|---|
| Specifies using the --trusted flag for click actions. | Missed | Passed |
The instructions your model reads when the skill loads.
Use this as the routing skill before loading a surface-specific skill.
| Task | Skill |
|---|---|
| Page DOM, text, network, SPA state, browser monitor, screenshots of browser content | interceptor-browser |
| Rich browser editors (Docs/Slides/Canva), canvas/WebGL camera viewers, scene-graph reads, page-world request overrides, blob/export capture, or "cooking" a live page with overlays/HUDs | interceptor-browser |
| Native macOS apps, OS dialogs, browser chrome, URL bars, app windows, menu bars | interceptor-macos |
| Native apps on this computer: element trees, windows, dialogs, menus, background input, native screenshots, system services | interceptor-desktop |
| Electron / Chromium desktop app web contents, such as Slack, VS Code, Notion, or Descript DOM/network/JS | interceptor macos cdp / interceptor macos cdp app via interceptor-macos/references/cdp-app.md |
| Electron / Chromium desktop app web contents, such as Slack, VS Code, Notion, or Descript DOM/network/JS | interceptor desktop cdp via interceptor-desktop |
| Native app runtime internals: live view/object graph, selector calls, rendered text mutation, hooks, MapKit/AppKit/SwiftUI runtime work | interceptor macos runtime via interceptor-macos/references/native-agent.md |
| Open or control a named app such as Brave, Mail, Finder, Signal, or Cursor | interceptor-macos |
| Open or control a named app | interceptor-desktop |
| Backgrounded, occluded, minimized, or cross-Space app capture | interceptor-macos |
| Deep web research: investigate a topic across many sources with breadth + verification | interceptor-research |
| Owned physical iPhone, app automation, runner state and device services | interceptor-ios |
| Capabilities added by an installed extension (operator-supplied) | run interceptor extensions list, then load the extension's own skill (interceptor-ext-<name>) |
Assume the person is working on this Mac while you work. Stay in the background at all costs. Take focus (the frontmost app, the focused window, or the tab showing in a window the user is using) only when the action truly cannot be done any other way. Never take it to make your own work easier, and never to test something. Assume the person is working on this computer while you work. Stay in the background at all costs. Take focus (the app in front, the focused window, or the tab showing in a window the user is using) only when the action truly cannot be done any other way. Never take it to make your own work easier, and never to test something.
Before any focus-moving verb, go down this list and stop at the first rung that works:
--app / --pid / --window on interceptor macos input, and --trusted browser input (a full install delivers it to an unfocused window). --app / --pid / --window on interceptor desktop input. interceptor tab keepalive <id> for a page that will not render while hidden.interceptor window new [url] moves your tab group into its own background window. Tabs there paint, play media, and take trusted clicks, and interceptor tab switch <id> there changes only that window. Never switch tabs in a window the user is working in. interceptor window new [url] moves your tab group into its own background window, and interceptor tab switch <id> there changes only that window. Never switch tabs in a window the user is working in. Known foreground-only cases: launching an app that is not running (it can come forward even from a background launch, and an app updater can raise a password prompt), and a click or drag on a minimized window or hidden app.
Known foreground case: app launch of a Store app starts it through the activation manager, which can bring it forward.
test cases passed, vs 4 / 18 without
More skills from the same source and nearby in the registry, with their headline benchmark lift.