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a3bc572c37
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import type {
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ExtensionAPI,
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ExtensionContext,
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BeforeAgentStartEvent,
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BeforeAgentStartEventResult,
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ExtensionCommandContext,
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} from "@earendil-works/pi-coding-agent";
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// Global state for manual model lock
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let isLocked = false;
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let lockedModel: any = null;
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// Model ID mappings for routing
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const MODELS: Record<string, { provider: string; id: string }> = {
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"free-core": { provider: "openrouter", id: "openrouter/owl-alpha" },
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"router-eval": { provider: "openrouter", id: "openrouter/owl-alpha" },
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"economy-devops": { provider: "openrouter", id: "qwen/qwen3.6-flash" },
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"economy-code": { provider: "openrouter", id: "deepseek/deepseek-v4-flash" },
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"precision-devops": { provider: "openrouter", id: "qwen/qwen-2.5-72b-instruct" },
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"precision-code-high":{ provider: "openrouter", id: "deepseek/deepseek-v4-pro" },
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"precision-react": { provider: "openrouter", id: "qwen/qwen3-coder-plus" },
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"context-heavy": { provider: "openrouter", id: "moonshotai/kimi-k2.6" },
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};
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function getModel(ctx: ExtensionContext, key: string): any {
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const mapping = MODELS[key];
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if (!mapping) return undefined;
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return ctx.modelRegistry.find(mapping.provider, mapping.id);
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}
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export default function (pi: ExtensionAPI) {
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// 1. Register /lock-model command
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pi.registerCommand("lock-model", {
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description: "Lock to a specific model. Disables dynamic routing until /unlock-model.",
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handler: async (args: string, ctx: ExtensionCommandContext) => {
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const modelId = (args || "").trim();
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if (!modelId) {
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ctx.ui.notify(
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"Usage: /lock-model <provider/model-id>\nExample: /lock-model openrouter/anthropic/claude-3.5-sonnet",
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"error"
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);
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return;
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}
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const slashIdx = modelId.indexOf("/");
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if (slashIdx < 0) {
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ctx.ui.notify("Invalid model ID format. Use: provider/model-id", "error");
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return;
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}
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const provider = modelId.substring(0, slashIdx);
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const id = modelId.substring(slashIdx + 1);
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const model = ctx.modelRegistry.find(provider, id);
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if (!model) {
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ctx.ui.notify(`Model not found: ${modelId}`, "error");
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return;
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}
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isLocked = true;
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lockedModel = model;
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pi.setModel(model);
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ctx.ui.notify(`Router disabled. Model locked to: ${modelId}`, "info");
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},
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});
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// 2. Register /unlock-model command
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pi.registerCommand("unlock-model", {
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description: "Re-enable dynamic prompt routing.",
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handler: async (_args: string, ctx: ExtensionCommandContext) => {
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isLocked = false;
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lockedModel = null;
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ctx.ui.notify("Router enabled. Prompts will be dynamically analyzed and routed.", "info");
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},
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});
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// 3. Intercept prompts before agent starts
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pi.on("before_agent_start", async (event: BeforeAgentStartEvent, ctx: ExtensionContext): Promise<BeforeAgentStartEventResult | undefined> => {
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const prompt = event.prompt;
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// Pass-through if user locked the model manually
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if (isLocked && lockedModel) {
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pi.setModel(lockedModel);
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return;
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}
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// Skip routing for short prompts / simple greetings
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if (prompt.trim().length < 15) {
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const model = getModel(ctx, "router-eval");
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if (model) pi.setModel(model);
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return;
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}
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try {
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const OPENROUTER_API_KEY = process.env["OPENROUTER_API_KEY"] || "";
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const response = await fetch("https://openrouter.ai/api/v1/chat/completions", {
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method: "POST",
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headers: {
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"Authorization": `Bearer ${OPENROUTER_API_KEY}`,
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"Content-Type": "application/json",
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},
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body: JSON.stringify({
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model: "openrouter/owl-alpha",
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messages: [
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{
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role: "system",
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content:
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'You are a minimal command interceptor router. Analyze the prompt and output ONLY a minified JSON object containing the tag and language. No markdown, no conversation.\n\nValid Tags:\n- "read" (reading/ingesting logs, docs, read-only code)\n- "discuss" (general chat, architectural concepts)\n- "search" (requires web search/external lookups)\n- "devops-low" (editing yaml, single dockerfile, basic bash, env adjustments)\n- "devops-high" (complex multi-container network layers, server crashes)\n- "code-analysis-low" (finding a bug in a short file)\n- "code-analysis-high" (refactoring multiple complex files, tracking syntax errors)\n- "codewrite-low" (generating simple syntax boilerplate or standard functions)\n- "codewrite-high" (complex features, heavy React state, complex PHP architectures)\n\nRespond exactly like this: {"tag":"tag-name","lang":"react|php|python|rust|bash|none"}',
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},
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{ role: "user", content: prompt },
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],
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max_tokens: 35,
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temperature: 0,
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}),
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});
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const payload = await response.json();
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const content = payload?.choices?.[0]?.message?.content?.trim();
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if (!content) {
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const fallback = getModel(ctx, "free-core");
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if (fallback) pi.setModel(fallback);
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return;
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}
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const decision = JSON.parse(content);
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const tag: string = decision.tag || "read";
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const lang: string = decision.lang || "none";
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// Deterministic routing tree
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let modelKey: string;
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switch (tag) {
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case "read":
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case "discuss":
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case "search":
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modelKey = "free-core";
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break;
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case "devops-low":
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modelKey = "economy-devops";
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break;
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case "devops-high":
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modelKey = "precision-devops";
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break;
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case "code-analysis-low":
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modelKey = "free-core";
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break;
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case "code-analysis-high":
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modelKey = "context-heavy";
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break;
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case "codewrite-low":
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modelKey = "economy-code";
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break;
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case "codewrite-high":
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modelKey = lang === "react" ? "precision-react" : "precision-code-high";
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break;
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default:
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modelKey = "free-core";
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}
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const model = getModel(ctx, modelKey);
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if (model) {
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pi.setModel(model);
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}
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} catch (_error) {
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// Fallback gracefully on network drops
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const fallback = getModel(ctx, "free-core");
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if (fallback) pi.setModel(fallback);
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}
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});
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}
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