ai: tighten public surface and document CuaProvider + supported models

packages/agent/src/agent.ts

@@ -54,7 +54,7 @@ function defaultSystemPrompt(provider: ReturnType<typeof providerForModel>): str
 	switch (provider) {
 		case "anthropic":
 			return anthropic.buildAnthropicSystemPrompt();
-		case "gemini":
+		case "google":
 			return gemini.buildGeminiSystemPrompt();
 		case "tzafon":
 			return tzafon.buildTzafonSystemPrompt();

packages/agent/src/tools.ts

@@ -37,7 +37,7 @@ export function createCuaComputerTools(args: CuaComputerToolsOptions): AgentTool
 			return createOpenAIComputerTools(args);
 		case "anthropic":
 			return createAnthropicComputerTools(args);
-		case "gemini":
+		case "google":
 			return createGeminiComputerTools(args);
 		case "tzafon":
 			return createTzafonComputerTools(args);

packages/ai/README.md

@@ -12,9 +12,6 @@ npm install @onkernel/cua-ai
 
 ## Quick Start
 
-See [`examples/quickstart.ts`](./examples/quickstart.ts) for a runnable version
-that reads `examples/screenshot.png` and uses `OPENAI_API_KEY`.
-
 ```ts
 import { readFile } from "node:fs/promises";
 import { complete, getCuaModel, openai } from "@onkernel/cua-ai";
@@ -56,20 +53,38 @@ computer-use model catalog and provider/tool metadata.
 
 ### Model Refs
 
-`getCuaModel()` accepts only provider-qualified model refs:
+`getCuaModel()` accepts only provider-qualified model refs of the form
+`<provider>:<model-id>`:
 
 ```ts
 getCuaModel("openai:gpt-5.5");
 getCuaModel("anthropic:claude-opus-4-7");
-getCuaModel("gemini:gemini-2.5-computer-use-preview-10-2025");
+getCuaModel("google:gemini-2.5-computer-use-preview-10-2025");
 getCuaModel("tzafon:tzafon.northstar-cua-fast");
 getCuaModel("yutori:n1.5-latest");
 ```
 
-`getCuaModel(ref)` returns a pi-ai `Model<Api>` object. You pass that model to
-pi-ai functions like `complete(model, context)` or `stream(model, context)`.
+`getCuaModel(ref)` returns a pi-ai `Model<Api>` you can pass to `complete()`
+or `stream()`.
+
+See [`docs/supported-models.md`](./docs/supported-models.md) for the current
+list of CUA-supporting models per provider.
+
+### CuaProvider
+
+`CuaProvider` is the string union of provider IDs this package targets:
+
+```ts
+type CuaProvider = "openai" | "anthropic" | "google" | "tzafon" | "yutori";
+```
+
+The IDs match pi-ai's `Model.provider` values exactly. `providerForModel(model)`
+narrows a pi-ai `Model<Api>` to a `CuaProvider`.
 
-`listCuaModels(provider?)` returns:
+### Listing Models
+
+`listCuaModels(provider?)` returns every CUA-supporting model, optionally
+filtered to one provider:
 
 ```ts
 interface CuaModelInfo {
@@ -86,12 +101,8 @@ Top-level exports:
 
 - `getCuaModel(ref: CuaModelRef): Model<Api>`
 - `listCuaModels(provider?: CuaProvider): CuaModelInfo[]`
-- `parseCuaModelRef(ref: string): { provider: CuaProvider; model: string }`
-- `formatCuaModelRef(provider: CuaProvider, model: string): CuaModelRef`
 - `providerForModel(model: Model<Api>): CuaProvider`
-- `CUA_PROVIDERS: readonly CuaProvider[]`
-- `CuaBatchSchema`, `CuaActionSchema`, `CuaNavigationSchema` TypeBox schemas
-- `createCuaActionSchema(actions?)`, `createCuaBatchSchema(actions?)`
+- `isCuaProvider(value: string): value is CuaProvider`
 
 Provider namespaces expose `createComputerToolDefinitions({ actions? })` for
 building model-facing pi-ai `Tool[]` definitions. Omit `actions` for the
@@ -130,9 +141,8 @@ Current coordinate contracts:
 - `yutori`: normalized coordinates in the 0-1000 range ([source](https://docs.yutori.com/reference/navigator), [SDK helper](https://github.com/yutori-ai/yutori-sdk-python/blob/main/yutori/navigator/coordinates.py))
 - `tzafon`: normalized coordinates in the 0-999 range ([source](https://docs.lightcone.ai/guides/coordinates/), [model card](https://huggingface.co/Tzafon/Northstar-CUA-Fast))
 
-`CuaActionSchema` validates one normalized computer action. The action
-vocabulary is intentionally provider-neutral and OpenAI-shaped because it maps
-cleanly to most browser computer-use APIs:
+The action vocabulary is intentionally provider-neutral and OpenAI-shaped
+because it maps cleanly to most browser computer-use APIs:
 
 ```ts
 type CuaAction =
@@ -171,21 +181,21 @@ type CuaActionGoto = {
 };
 ```
 
-`CuaBatchSchema` validates the input for a batched computer tool:
+The provider namespace `createComputerToolDefinitions()` emits a
+`batch_computer_actions` tool whose input is:
 
 ```ts
 type CuaBatchInput = {
   actions: CuaAction[];
 };
 ```
 
-Use it for a tool like `batch_computer_actions`, where the model can plan
-several writes and reads in one call. Read actions such as `screenshot`, `url`,
-and `cursor_position` can be interleaved with writes so your executor can return
-fresh state in the same order.
+The model can plan several writes and reads in one call. Read actions such as
+`screenshot`, `url`, and `cursor_position` can be interleaved with writes so
+your executor can return fresh state in the same order.
 
-`CuaNavigationSchema` validates a smaller convenience tool for high-level
-navigation:
+When `actions` is omitted, the OpenAI namespace also emits a `computer_use_extra`
+navigation tool whose input is:
 
 ```ts
 type CuaNavigationInput = {
@@ -194,9 +204,6 @@ type CuaNavigationInput = {
 };
 ```
 
-Use it for a simple `computer_use_extra`-style tool when you want navigation
-available without exposing the full batch action surface.
-
 Provider namespaces:
 
 - `openai`: `createComputerToolDefinitions`, `COMPUTER_TOOL_COORDINATES`, OpenAI CUA action schemas, and `OPENAI_BATCH_INSTRUCTIONS`

packages/ai/docs/supported-models.md

@@ -0,0 +1,65 @@
+# Supported CUA Models
+
+`@onkernel/cua-ai` accepts any pi-ai model whose ID is annotated as
+CUA-supporting in `CUA_MODEL_ANNOTATIONS` (see
+[`src/models.ts`](../src/models.ts)). Annotations are either a `family`
+match (root + dated snapshots) or an `exact` ID match. Each annotation
+cites the provider's CUA docs.
+
+The list below is the current snapshot. Run
+`listCuaModels(provider?)` for the live list — it merges pi-ai's registry
+with CUA-only entries that pi-ai does not ship yet.
+
+## `openai`
+
+API: `openai-responses` · coordinates: pixel
+
+Family matches (all dated snapshots accepted):
+
+- `gpt-5.4` ([docs](https://developers.openai.com/api/docs/models/gpt-5.4))
+- `gpt-5.5` ([docs](https://developers.openai.com/api/docs/models/gpt-5.5))
+
+## `anthropic`
+
+API: `anthropic-messages` · coordinates: pixel
+
+Family matches (all dated snapshots accepted):
+
+- `claude-3-7-sonnet`
+- `claude-opus-4`
+- `claude-sonnet-4`
+- `claude-haiku-4`
+
+Source: [Anthropic computer use docs](https://docs.anthropic.com/en/docs/build-with-claude/computer-use).
+
+## `google`
+
+API: `google-generative-ai` · coordinates: normalized 0–999
+
+Exact IDs:
+
+- `gemini-3-flash-preview`
+- `gemini-2.5-computer-use-preview-10-2025`
+
+Source: [Gemini computer use docs](https://ai.google.dev/gemini-api/docs/computer-use).
+
+## `tzafon`
+
+API: `tzafon-responses` · coordinates: normalized 0–999
+
+Exact IDs:
+
+- `tzafon.northstar-cua-fast` ([model card](https://huggingface.co/Tzafon/Northstar-CUA-Fast))
+
+## `yutori`
+
+API: `yutori-chat-completions` · coordinates: normalized 0–1000
+
+Exact IDs:
+
+- `n1-latest`
+- `n1-20260203`
+- `n1.5-latest`
+- `n1.5-20260428`
+
+Source: [Yutori Navigator reference](https://docs.yutori.com/reference/navigator).

packages/ai/examples/quickstart.ts

@@ -19,7 +19,7 @@ const screenshot = await readFile(screenshotPath);
 // const tools = anthropic.createComputerToolDefinitions({ actions: ["click"] });
 //
 // const apiKey = process.env.GOOGLE_API_KEY;
-// const modelRef = "gemini:gemini-2.5-computer-use-preview-10-2025";
+// const modelRef = "google:gemini-2.5-computer-use-preview-10-2025";
 // const model = getCuaModel(modelRef);
 // const tools = gemini.createComputerToolDefinitions({ actions: ["click"] });
 

packages/ai/src/index.ts

@@ -2,8 +2,45 @@ import { registerCuaProviders } from "./providers.js";
 
 export * from "@earendil-works/pi-ai";
 
-export * from "./models.js";
-export * from "./providers/common.js";
+export {
+	getCuaModel,
+	isCuaProvider,
+	listCuaModels,
+	providerForModel,
+} from "./models.js";
+export type { CuaModelInfo, CuaModelRef, CuaProvider } from "./models.js";
+
+export {
+	CUA_ACTION_TYPES,
+	CUA_BATCH_TOOL_NAME,
+	CUA_NAVIGATION_TOOL_NAME,
+	createComputerToolDefinitions,
+} from "./providers/common.js";
+export type {
+	ComputerToolCoordinateSystem,
+	CreateComputerToolDefinitionsOptions,
+	CuaAction,
+	CuaActionBack,
+	CuaActionClick,
+	CuaActionCursorPosition,
+	CuaActionDoubleClick,
+	CuaActionDrag,
+	CuaActionForward,
+	CuaActionGoto,
+	CuaActionKeypress,
+	CuaActionMouseDown,
+	CuaActionMouseUp,
+	CuaActionMove,
+	CuaActionScreenshot,
+	CuaActionScroll,
+	CuaActionType,
+	CuaActionTypeText,
+	CuaActionUrl,
+	CuaActionWait,
+	CuaBatchInput,
+	CuaNavigationInput,
+} from "./providers/common.js";
+
 export * as anthropic from "./providers/anthropic/index.js";
 export * as gemini from "./providers/gemini/index.js";
 export * as openai from "./providers/openai/index.js";

packages/ai/src/models.ts

@@ -5,7 +5,7 @@ import {
 	getModels,
 } from "@earendil-works/pi-ai";
 
-export type CuaProvider = "openai" | "anthropic" | "gemini" | "tzafon" | "yutori";
+export type CuaProvider = "openai" | "anthropic" | "google" | "tzafon" | "yutori";
 export type CuaModelRef = `${CuaProvider}:${string}`;
 
 export interface CuaModelInfo {
@@ -15,7 +15,7 @@ export interface CuaModelInfo {
 	name: string;
 }
 
-export const CUA_PROVIDERS: readonly CuaProvider[] = ["openai", "anthropic", "gemini", "tzafon", "yutori"];
+export const CUA_PROVIDERS: readonly CuaProvider[] = ["openai", "anthropic", "google", "tzafon", "yutori"];
 
 // CUA support annotations.
 //
@@ -52,7 +52,7 @@ export const CUA_MODEL_ANNOTATIONS: Record<CuaProvider, readonly CuaModelAnnotat
 		{ match: { kind: "family", family: "claude-sonnet-4" }, source: "https://docs.anthropic.com/en/docs/build-with-claude/computer-use" },
 		{ match: { kind: "family", family: "claude-haiku-4" }, source: "https://docs.anthropic.com/en/docs/build-with-claude/computer-use" },
 	],
-	gemini: [
+	google: [
 		{ match: { kind: "exact", id: "gemini-3-flash-preview" }, source: "https://ai.google.dev/gemini-api/docs/computer-use" },
 		{ match: { kind: "exact", id: "gemini-2.5-computer-use-preview-10-2025" }, source: "https://ai.google.dev/gemini-api/docs/computer-use" },
 	],
@@ -78,8 +78,8 @@ const CUA_MODEL_OVERRIDES: Record<CuaProvider, readonly Model<Api>[]> = {
 		cuaModel("openai", "gpt-5.5-2026-04-23", "GPT-5.5 (2026-04-23)"),
 	],
 	anthropic: [],
-	gemini: [
-		cuaModel("gemini", "gemini-2.5-computer-use-preview-10-2025", "Gemini 2.5 Computer Use Preview"),
+	google: [
+		cuaModel("google", "gemini-2.5-computer-use-preview-10-2025", "Gemini 2.5 Computer Use Preview"),
 	],
 	tzafon: [
 		cuaModel("tzafon", "tzafon.northstar-cua-fast", "Tzafon Northstar CUA Fast"),
@@ -106,7 +106,6 @@ export function parseCuaModelRef(ref: string): { provider: CuaProvider; model: s
 }
 
 export function formatCuaModelRef(provider: CuaProvider, model: string): CuaModelRef {
-	if (!model.trim()) throw new Error("model id is empty");
 	return `${provider}:${model}` as CuaModelRef;
 }
 
@@ -119,7 +118,7 @@ export function listCuaModels(provider?: CuaProvider): CuaModelInfo[] {
 			const ref = formatCuaModelRef(p, model.id);
 			byRef.set(ref, { ref, provider: p, model: model.id, name: model.name });
 		}
-		for (const model of getModels(piProviderFor(p) as never) as Model<Api>[]) {
+		for (const model of getModels(p as never) as Model<Api>[]) {
 			if (!supportsCuaProvider(p, model.id)) continue;
 			const ref = formatCuaModelRef(p, model.id);
 			if (byRef.has(ref)) continue;
@@ -140,49 +139,24 @@ export function getCuaModel(ref: CuaModelRef): Model<Api> {
 	if (!supportsCuaProvider(provider, modelId)) {
 		throw new Error(`unsupported CUA model "${ref}"`);
 	}
-	const fromRegistry = getModel(piProviderFor(provider) as never, modelId as never) as Model<Api> | undefined;
+	const fromRegistry = getModel(provider as never, modelId as never) as Model<Api> | undefined;
 	if (fromRegistry) return fromRegistry;
 	const override = CUA_MODEL_OVERRIDES[provider].find((m) => m.id === modelId);
 	if (override) return override;
 	throw new Error(`CUA model "${ref}" is supported but not registered. Add it to pi-ai (models.dev) or CUA_MODEL_OVERRIDES.`);
 }
 
 export function providerForModel(model: Model<Api>): CuaProvider {
-	switch (model.provider) {
-		case "openai":
-			return "openai";
-		case "anthropic":
-			return "anthropic";
-		case "google":
-			return "gemini";
-		case "tzafon":
-			return "tzafon";
-		case "yutori":
-			return "yutori";
-		default:
-			throw new Error(`unsupported CUA model provider "${model.provider}"`);
+	if (!isCuaProvider(model.provider)) {
+		throw new Error(`unsupported CUA model provider "${model.provider}"`);
 	}
+	return model.provider;
 }
 
 export function isCuaProvider(value: string): value is CuaProvider {
 	return (CUA_PROVIDERS as readonly string[]).includes(value);
 }
 
-function piProviderFor(provider: CuaProvider): string {
-	switch (provider) {
-		case "openai":
-			return "openai";
-		case "anthropic":
-			return "anthropic";
-		case "gemini":
-			return "google";
-		case "tzafon":
-			return "tzafon";
-		case "yutori":
-			return "yutori";
-	}
-}
-
 function supportsCuaProvider(provider: CuaProvider, modelId: string): boolean {
 	return findCuaAnnotation(provider, modelId) !== undefined;
 }
@@ -204,8 +178,8 @@ function cuaModel(provider: CuaProvider, id: string, name: string): Model<Api> {
 	const base = {
 		id,
 		name,
-		provider: piProviderFor(provider),
-		reasoning: provider === "openai" || provider === "anthropic" || provider === "gemini",
+		provider,
+		reasoning: provider === "openai" || provider === "anthropic" || provider === "google",
 		input: ["text", "image"],
 		cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
 	} satisfies Partial<Model<Api>>;
@@ -215,7 +189,7 @@ function cuaModel(provider: CuaProvider, id: string, name: string): Model<Api> {
 			return { ...base, api: "openai-responses", baseUrl: "https://api.openai.com/v1", contextWindow: 400_000, maxTokens: 32_768 } as Model<Api>;
 		case "anthropic":
 			return { ...base, api: "anthropic-messages", baseUrl: "https://api.anthropic.com", contextWindow: 200_000, maxTokens: 64_000 } as Model<Api>;
-		case "gemini":
+		case "google":
 			return { ...base, api: "google-generative-ai", baseUrl: "https://generativelanguage.googleapis.com/v1beta", contextWindow: 1_048_576, maxTokens: 65_536 } as Model<Api>;
 		case "tzafon":
 			return { ...base, api: "tzafon-responses", baseUrl: "https://api.lightcone.ai", contextWindow: 128_000, maxTokens: 4_096 } as Model<Api>;