@appos.space/plugin-types

TypeScript type definitions for the AppOS Plugin API.

Declaration-only package — zero runtime, zero bundle impact. Gives you full autocomplete and type checking for all 43 plugin namespaces and the full PermissionScope union when authoring plugins for AppOS.

Install

npm install --save-dev @appos.space/plugin-types

Usage

Import the types you need (the main entry ships module exports only; the ONE exception is the opt-in globals subpath — see Host-injected globals below):

import type {
  PluginContext,
  PluginManifest,
  ViewDescriptor,
  PermissionScope,
} from "@appos.space/plugin-types";

export async function activate(ctx: PluginContext) {
  const dir = await ctx.fileOps.getActiveDirectory();
  ctx.ui.showNotification({ message: `Hello from ${dir}` });
}

Host-injected globals (opt-in)

AppOS hosts inject a Foundation-bridged URL constructor into the JavaScriptCore plugin runtime (targeted for host 1.1.0). The matching ambient declaration ships as a SEPARATE opt-in subpath, @appos.space/plugin-types/globals, so nothing global leaks into projects that don't reference it. Opt in from your plugin entry file:

/// <reference types="@appos.space/plugin-types/globals" />

or in tsconfig.json:

{ "compilerOptions": { "types": ["@appos.space/plugin-types/globals"] } }

The global is typed URLConstructor | undefined — older hosts, menu-bar JSContext pools, and the appos.jsc.urlGlobal.disabled kill switch all leave it undefined. ALWAYS guard before use. Pinning your manifest's minHostVersion to an injecting host release removes only the older-host reason for absence — it does not override the kill switch or the menu-bar limitation, so unguarded use can still crash at runtime:

if (typeof URL === "function" && URL.canParse(raw)) {
  const u = new URL(raw);
  // u.hostname parses identically to the host's own security validators
}

Notes:

• Foundation (RFC 3986) semantics, not a WHATWG polyfill. The pinned divergences are documented in the subpath's docblock: default ports retained in href/port, empty path stays "", out-of-range ports accepted, hostname lowercased with IPv6 unbracketed (host/origin re-bracket). Pre-encoded query values round-trip verbatim on href (%3A stays %3A) — the %3A → %253A double-encode seen via Foundation's URLComponents.queryItems does not apply to this API.
• url.searchParams is NOT in the v1 subset — the type omits it and the runtime getter throws a TypeError; parse url.search manually. URL.parse is likewise absent, and all accessors are readonly.
• Reference the subpath only from a DOM-free tsconfig (e.g. "lib": ["ES2020"]) — never from webview code compiled against lib.dom, which already has its own URL. The two declarations conflict, but don't rely on that as a safeguard: with skipLibCheck enabled (the default in most scaffolds) TypeScript suppresses declaration-file conflicts and silently merges the interfaces, so browser-only members (searchParams, mutable accessors, unguarded construction) can type-check against the narrower JSC runtime. The DOM-free lib is the only reliable isolation.

What's included

• Core — PluginContext, PluginManifest, activation lifecycle
• Views — ViewDescriptor union for declarative UI
• Namespaces — typed APIs for fileOps, ui, shell, network, storage, actions, and 37 more (the 22 host-core namespaces plus the 21 core-plugin namespaces)
• Permissions — PermissionScope: the 135 canonical permission scopes you can request in plugin.json, plus the dynamic oauth.${string} family for provider-specific OAuth scopes (e.g. oauth.github), plus 5 deprecated legacy aliases kept in the type union for compile-time compatibility only — of those, only network.fetch is recognized by the host (normalized to network.outbound); network, smartFolders, and webview have no host-side entry, and shell.uncontained is never declarable (the uncontained shell tier is inferred from filesystem.readAll)
• Colors / Fonts / Icons — design tokens matching the host app

Version

Tracks the plugin API version — the package's major.minor matches the plugin API's major.minor (e.g. 3.0.x of this package ↔ plugin API 3.0.x).

Related packages

• @appos.space/view-builders — ergonomic vstack() / listItem() / section() helpers for ViewDescriptor
• @appos.space/plugin-utils — shared pure utilities (path conversion, formatting, action routing)

License

MIT © InstantlyEasy