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https://github.com/getcompanion-ai/co-mono.git
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feat: initial impl
- add GitHub Copilot model discovery (env token fallback, headers, compat) plus fallback list and quoted provider keys in generated map - surface Copilot provider end-to-end (KnownProvider/default, env+OAuth token refresh/save, enterprise base URL swap, available only when creds/env exist) - tweak interactive OAuth UI to render instruction text and prompt placeholders gpt-5.2-high took about 35 minutes. It had a lot of trouble with `npm check` and went off on a "let's adjust every tsconfig" side quest. Device code flow works, but the ai/scripts/generate-models.ts impl is wrong as models from months ago are missing and only those deprecated are accessible in the /models picker.
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cau1k
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10 changed files with 727 additions and 101 deletions
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@ -29,6 +29,162 @@ interface ModelsDevModel {
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};
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}
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const COPILOT_STATIC_HEADERS = {
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"User-Agent": "GitHubCopilotChat/0.35.0",
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"Editor-Version": "vscode/1.105.1",
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"Editor-Plugin-Version": "copilot-chat/0.35.0",
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"Copilot-Integration-Id": "copilot-developer-cli",
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"Openai-Intent": "conversation-edits",
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"X-Initiator": "agent",
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} as const;
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function getGitHubTokenFromEnv(): string | null {
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return process.env.COPILOT_GITHUB_TOKEN || process.env.GH_TOKEN || process.env.GITHUB_TOKEN || null;
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}
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function isDeprecatedCopilotModel(model: unknown): boolean {
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if (!model || typeof model !== "object") return false;
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const m = model as Record<string, unknown>;
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if (m.deprecated === true) return true;
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if (m.is_deprecated === true) return true;
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if (m.status === "deprecated") return true;
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if (m.lifecycle === "deprecated") return true;
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const id = typeof m.id === "string" ? m.id : "";
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return id.includes("deprecated");
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}
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function supportsToolsCopilotModel(model: unknown): boolean {
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if (!model || typeof model !== "object") return true;
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const m = model as Record<string, unknown>;
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const caps = m.capabilities;
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if (!caps || typeof caps !== "object") return true;
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const tools = (caps as Record<string, unknown>).tools;
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if (tools === undefined) return true;
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return tools !== false;
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}
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function supportsVisionCopilotModel(model: unknown): boolean {
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if (!model || typeof model !== "object") return false;
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const m = model as Record<string, unknown>;
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const caps = m.capabilities;
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if (!caps || typeof caps !== "object") return false;
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const vision = (caps as Record<string, unknown>).vision;
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if (vision === true) return true;
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const modalities = (caps as Record<string, unknown>).modalities;
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if (Array.isArray(modalities)) return modalities.includes("vision") || modalities.includes("image");
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return false;
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}
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function getNumberField(model: unknown, keys: string[], fallback: number): number {
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if (!model || typeof model !== "object") return fallback;
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const m = model as Record<string, unknown>;
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for (const key of keys) {
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const value = m[key];
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if (typeof value === "number" && Number.isFinite(value)) return value;
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}
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return fallback;
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}
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async function fetchCopilotModels(githubToken: string): Promise<Model<any>[]> {
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try {
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console.log("Fetching models from GitHub Copilot API...");
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const response = await fetch("https://api.githubcopilot.com/models", {
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headers: {
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Accept: "application/json",
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Authorization: `Bearer ${githubToken}`,
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...COPILOT_STATIC_HEADERS,
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},
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});
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if (!response.ok) {
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const text = await response.text();
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console.warn(`Failed to fetch GitHub Copilot models: ${response.status} ${text}`);
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return [];
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}
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const data = (await response.json()) as unknown;
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const list =
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Array.isArray(data) ? data : Array.isArray((data as any)?.models) ? (data as any).models : (data as any)?.data;
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if (!Array.isArray(list)) {
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console.warn("Failed to parse GitHub Copilot models response");
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return [];
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}
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const models: Model<any>[] = [];
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for (const item of list) {
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if (isDeprecatedCopilotModel(item)) continue;
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if (!supportsToolsCopilotModel(item)) continue;
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const id = typeof (item as any)?.id === "string" ? (item as any).id : typeof item === "string" ? item : null;
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if (!id) continue;
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const name = typeof (item as any)?.name === "string" ? (item as any).name : id;
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const contextWindow = getNumberField(item, ["context_window", "contextWindow", "max_context_tokens"], 128000);
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const maxTokens = getNumberField(item, ["max_output_tokens", "maxTokens", "max_tokens"], 8192);
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const input: ("text" | "image")[] = supportsVisionCopilotModel(item) ? ["text", "image"] : ["text"];
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models.push({
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id,
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name,
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api: "openai-completions",
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provider: "github-copilot",
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baseUrl: "https://api.githubcopilot.com",
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reasoning: false,
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input,
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cost: {
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input: 0,
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output: 0,
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cacheRead: 0,
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cacheWrite: 0,
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},
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contextWindow,
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maxTokens,
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headers: { ...COPILOT_STATIC_HEADERS },
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compat: {
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supportsStore: false,
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supportsDeveloperRole: false,
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supportsReasoningEffort: false,
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},
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});
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}
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console.log(`Fetched ${models.length} models from GitHub Copilot`);
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return models;
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} catch (error) {
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console.warn("Failed to fetch GitHub Copilot models:", error);
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return [];
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}
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}
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function getFallbackCopilotModels(): Model<any>[] {
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const fallbackModelIds = ["gpt-4o", "gpt-4o-mini", "claude-3.5-sonnet", "o1", "o1-mini"];
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return fallbackModelIds.map((id) => ({
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id,
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name: id,
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api: "openai-completions",
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provider: "github-copilot",
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baseUrl: "https://api.githubcopilot.com",
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reasoning: false,
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input: ["text"],
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cost: {
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input: 0,
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output: 0,
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cacheRead: 0,
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cacheWrite: 0,
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},
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contextWindow: 128000,
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maxTokens: 8192,
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headers: { ...COPILOT_STATIC_HEADERS },
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compat: {
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supportsStore: false,
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supportsDeveloperRole: false,
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supportsReasoningEffort: false,
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},
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}));
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}
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async function fetchOpenRouterModels(): Promise<Model<any>[]> {
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try {
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console.log("Fetching models from OpenRouter API...");
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@ -321,6 +477,20 @@ async function generateModels() {
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// Combine models (models.dev has priority)
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const allModels = [...modelsDevModels, ...openRouterModels];
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const githubToken = getGitHubTokenFromEnv();
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let copilotModels: Model<any>[] = [];
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if (!githubToken) {
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console.warn("No GitHub token found for GitHub Copilot model discovery (set COPILOT_GITHUB_TOKEN, GH_TOKEN, or GITHUB_TOKEN). Using fallback list.");
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copilotModels = getFallbackCopilotModels();
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} else {
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copilotModels = await fetchCopilotModels(githubToken);
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if (copilotModels.length === 0) {
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console.warn("No GitHub Copilot models fetched. Using fallback list.");
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copilotModels = getFallbackCopilotModels();
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}
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}
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allModels.push(...copilotModels);
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// Fix incorrect cache pricing for Claude Opus 4.5 from models.dev
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// models.dev has 3x the correct pricing (1.5/18.75 instead of 0.5/6.25)
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const opus45 = allModels.find(m => m.provider === "anthropic" && m.id === "claude-opus-4-5");
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@ -458,7 +628,7 @@ export const MODELS = {
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// Generate provider sections
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for (const [providerId, models] of Object.entries(providers)) {
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output += `\t${providerId}: {\n`;
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output += `\t${JSON.stringify(providerId)}: {\n`;
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for (const model of Object.values(models)) {
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output += `\t\t"${model.id}": {\n`;
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@ -469,6 +639,12 @@ export const MODELS = {
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if (model.baseUrl) {
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output += `\t\t\tbaseUrl: "${model.baseUrl}",\n`;
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}
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if (model.headers) {
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output += `\t\t\theaders: ${JSON.stringify(model.headers)},\n`;
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}
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if ((model as any).compat) {
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output += `\t\t\tcompat: ${JSON.stringify((model as any).compat)},\n`;
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}
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output += `\t\t\treasoning: ${model.reasoning},\n`;
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output += `\t\t\tinput: [${model.input.map(i => `"${i}"`).join(", ")}],\n`;
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output += `\t\t\tcost: {\n`;
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