From baa45e9a67a2f510bd75df0deab655aeab66af76 Mon Sep 17 00:00:00 2001
From: Markus Hartung <diegosouzapw@users.noreply.github.com>
Date: Wed, 2 Sep 2026 01:25:34 -0300
Subject: [PATCH] feat(providers): add chatgpt-session model route table

---
 open-sse/executors/chatgpt-session/models.ts | 47 +++++++++++++++++++
 tests/unit/chatgpt-session-models.test.ts    | 48 ++++++++++++++++++++
 2 files changed, 95 insertions(+)
 create mode 100644 open-sse/executors/chatgpt-session/models.ts
 create mode 100644 tests/unit/chatgpt-session-models.test.ts

diff --git a/open-sse/executors/chatgpt-session/models.ts b/open-sse/executors/chatgpt-session/models.ts
new file mode 100644
index 0000000000..e2745212d6
--- /dev/null
+++ b/open-sse/executors/chatgpt-session/models.ts
@@ -0,0 +1,47 @@
+/**
+ * Public model routes for the ChatGPT Session provider.
+ *
+ * Each public slug pins one backend model plus one reasoning effort. The vendored browser
+ * adapter accepts only the two backend ids and reads the effort from
+ * `CodexParsedRequest.options.reasoning`, so the slug is the only knob a client turns.
+ */
+
+export type ChatGptSessionEffort = "low" | "medium" | "high" | "xhigh" | "max";
+
+export interface ChatGptSessionRoute {
+  id: string;
+  backendModel: "gpt-5.6-sol" | "gpt-5.6-luna";
+  effort: ChatGptSessionEffort;
+  /** Requires an account whose browser probe reported Pro. */
+  pro: boolean;
+  /** Requires the Sol model selector; Luna-only accounts get the luna/think routes. */
+  sol: boolean;
+}
+
+const ROUTES: ReadonlyMap<string, ChatGptSessionRoute> = new Map([
+  ["luna", { id: "luna", backendModel: "gpt-5.6-luna", effort: "low", pro: false, sol: false }],
+  [
+    "think",
+    { id: "think", backendModel: "gpt-5.6-luna", effort: "medium", pro: false, sol: false },
+  ],
+  ["instant", { id: "instant", backendModel: "gpt-5.6-sol", effort: "low", pro: false, sol: true }],
+  [
+    "medium",
+    { id: "medium", backendModel: "gpt-5.6-sol", effort: "medium", pro: false, sol: true },
+  ],
+  ["high", { id: "high", backendModel: "gpt-5.6-sol", effort: "high", pro: false, sol: true }],
+  [
+    "extra-high",
+    { id: "extra-high", backendModel: "gpt-5.6-sol", effort: "xhigh", pro: true, sol: true },
+  ],
+  ["pro", { id: "pro", backendModel: "gpt-5.6-sol", effort: "max", pro: true, sol: true }],
+] as const);
+
+export const CHATGPT_SESSION_ROUTE_IDS: readonly string[] = [...ROUTES.keys()];
+
+export function requireChatGptSessionRoute(model: string): ChatGptSessionRoute {
+  const normalized = model.trim().replace(/^(?:chatgpt-session|cgpt-session)\//, "");
+  const route = ROUTES.get(normalized);
+  if (!route) throw new Error(`Unsupported ChatGPT Session model: ${model}`);
+  return route;
+}
diff --git a/tests/unit/chatgpt-session-models.test.ts b/tests/unit/chatgpt-session-models.test.ts
new file mode 100644
index 0000000000..8289c37fa7
--- /dev/null
+++ b/tests/unit/chatgpt-session-models.test.ts
@@ -0,0 +1,48 @@
+import { test } from "node:test";
+import assert from "node:assert/strict";
+
+import {
+  CHATGPT_SESSION_ROUTE_IDS,
+  requireChatGptSessionRoute,
+} from "../../open-sse/executors/chatgpt-session/models.ts";
+
+test("exposes the seven public routes", () => {
+  assert.deepEqual(
+    [...CHATGPT_SESSION_ROUTE_IDS],
+    ["luna", "think", "instant", "medium", "high", "extra-high", "pro"]
+  );
+});
+
+test("maps a slug to its backend model and effort", () => {
+  assert.deepEqual(requireChatGptSessionRoute("high"), {
+    id: "high",
+    backendModel: "gpt-5.6-sol",
+    effort: "high",
+    pro: false,
+    sol: true,
+  });
+});
+
+test("strips the provider prefix from a qualified model id", () => {
+  assert.equal(requireChatGptSessionRoute("chatgpt-session/pro").id, "pro");
+  assert.equal(requireChatGptSessionRoute("cgpt-session/pro").id, "pro");
+});
+
+test("luna routes target the luna backend and never require sol", () => {
+  const luna = requireChatGptSessionRoute("luna");
+  assert.equal(luna.backendModel, "gpt-5.6-luna");
+  assert.equal(luna.sol, false);
+  assert.equal(requireChatGptSessionRoute("think").effort, "medium");
+});
+
+test("pro routes are flagged pro", () => {
+  assert.equal(requireChatGptSessionRoute("pro").pro, true);
+  assert.equal(requireChatGptSessionRoute("extra-high").pro, true);
+});
+
+test("rejects an unknown slug", () => {
+  assert.throws(
+    () => requireChatGptSessionRoute("gpt-4"),
+    /Unsupported ChatGPT Session model: gpt-4/
+  );
+});