666aecfc7c
Add clientDetector utility to identify CLI tools (Claude Code, Gemini CLI, Antigravity, Codex) from request headers. When the CLI tool and provider are a native pair, skip all translation — only swap model and Bearer token. Made-with: Cursor
53 lines
1.8 KiB
JavaScript
53 lines
1.8 KiB
JavaScript
/**
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* Detect CLI tool identity from request headers/body.
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* Used to determine if a request can be passed through losslessly.
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*/
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// Map of CLI tool identifiers to provider IDs they are "native" to
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const NATIVE_PAIRS = {
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"claude": ["claude", "anthropic"],
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"gemini-cli": ["gemini-cli"],
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"antigravity": ["antigravity"],
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"codex": ["codex"],
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};
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/**
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* Detect which CLI tool is making the request.
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* Returns one of: "claude" | "gemini-cli" | "antigravity" | "codex" | null
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* @param {object} headers - Lowercase header key/value object
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* @param {object} body - Parsed request body
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*/
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export function detectClientTool(headers = {}, body = {}) {
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const ua = (headers["user-agent"] || "").toLowerCase();
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const xApp = (headers["x-app"] || "").toLowerCase();
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// Antigravity: detected via body field (not header)
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if (body.userAgent === "antigravity") return "antigravity";
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// Claude Code / Claude CLI
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if (ua.includes("claude-cli") || ua.includes("claude-code") || xApp === "cli") return "claude";
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// Gemini CLI
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if (ua.includes("gemini-cli")) return "gemini-cli";
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// Codex CLI
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if (ua.includes("codex-cli")) return "codex";
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return null;
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}
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/**
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* Check if this CLI tool + provider pair should be passed through losslessly.
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* @param {string|null} clientTool - Result of detectClientTool()
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* @param {string} provider - Provider ID (e.g. "claude", "gemini-cli")
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*/
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export function isNativePassthrough(clientTool, provider) {
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if (!clientTool) return false;
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const nativeProviders = NATIVE_PAIRS[clientTool];
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if (!nativeProviders) return false;
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// Support anthropic-compatible-* variants
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const normalizedProvider = provider.startsWith("anthropic-compatible")
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? "anthropic"
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: provider;
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return nativeProviders.includes(normalizedProvider);
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}
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