From aeb572e1ce88ba1e1c0e49bb96ec369c0f500ede Mon Sep 17 00:00:00 2001
From: Pachara Nokroy <pacharanokroy2003@gmail.com>
Date: Thu, 6 Aug 2026 18:36:54 +0700
Subject: [PATCH] feat: expose ProviderRegistry.list()

---
 src/cli/index.ts          |  6 +++++-
 src/providers/registry.ts |  5 +++++
 tests/providers.test.ts   | 14 ++++++++++++++
 3 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/src/cli/index.ts b/src/cli/index.ts
index 7ec9b70..1107382 100644
--- a/src/cli/index.ts
+++ b/src/cli/index.ts
@@ -156,9 +156,13 @@ async function cmdCompare(args: ParsedArgs): Promise<number> {
 
 function cmdList(): number {
   const scorers = defaultScorerRegistry().list().sort();
+  const providers = defaultRegistry(process.env).list().sort();
+
   console.log("Registered scorers:");
   for (const s of scorers) console.log(`  - ${s}`);
-  console.log("\nRegistered providers: mock, openai, anthropic, groq, openrouter");
+
+  console.log("\nRegistered providers:");
+  for (const p of providers) console.log(`  - ${p}`);
   return 0;
 }
 
diff --git a/src/providers/registry.ts b/src/providers/registry.ts
index bb5c399..9c9ef33 100644
--- a/src/providers/registry.ts
+++ b/src/providers/registry.ts
@@ -41,6 +41,11 @@ export class ProviderRegistry {
     this.cache.set(name, provider);
     return provider;
   }
+
+  /** List all registered provider names. */
+  list(): string[] {
+    return [...this.factories.keys()];
+  }
 }
 
 /**
diff --git a/tests/providers.test.ts b/tests/providers.test.ts
index 1867889..ab186d5 100644
--- a/tests/providers.test.ts
+++ b/tests/providers.test.ts
@@ -68,4 +68,18 @@ describe("ProviderRegistry", () => {
     expect(reg.has("openai")).toBe(true);
     expect(reg.has("anthropic")).toBe(true);
   });
+  it("lists built-in and custom providers", () => {
+  const reg = defaultRegistry({});
+  
+  expect(reg.list().sort()).toEqual([
+    "anthropic",
+    "groq",
+    "mock",
+    "openai",
+    "openrouter",
+  ]);
+  
+  reg.register("custom", () => new MockProvider());
+  expect(reg.list()).toContain("custom");
+});
 });