refactor(librarian): switch fallback to minimax-m2.5-free → gemini-3-flash → big-pickle

src/shared/model-requirements.test.ts

@@ -44,19 +44,19 @@ describe("AGENT_MODEL_REQUIREMENTS", () => {
     expect(last.model).toBe("big-pickle")
   })
 
-  test("librarian has valid fallbackChain with glm-5 as primary", () => {
+  test("librarian has valid fallbackChain with minimax-m2.5-free as primary", () => {
     // given - librarian agent requirement
     const librarian = AGENT_MODEL_REQUIREMENTS["librarian"]
 
     // when - accessing librarian requirement
-    // then - fallbackChain exists with glm-5 as first entry
+    // then - fallbackChain exists with minimax-m2.5-free as first entry
     expect(librarian).toBeDefined()
     expect(librarian.fallbackChain).toBeArray()
     expect(librarian.fallbackChain.length).toBeGreaterThan(0)
 
     const primary = librarian.fallbackChain[0]
-    expect(primary.providers[0]).toBe("zai-coding-plan")
-    expect(primary.model).toBe("glm-5")
+    expect(primary.providers[0]).toBe("opencode")
+    expect(primary.model).toBe("minimax-m2.5-free")
   })
 
   test("explore has valid fallbackChain with grok-code-fast-1 as primary", () => {

src/shared/model-requirements.ts

@@ -38,9 +38,9 @@ export const AGENT_MODEL_REQUIREMENTS: Record<string, ModelRequirement> = {
   },
    librarian: {
      fallbackChain: [
-       { providers: ["zai-coding-plan"], model: "glm-5" },
+       { providers: ["opencode"], model: "minimax-m2.5-free" },
+       { providers: ["google", "github-copilot", "opencode"], model: "gemini-3-flash" },
        { providers: ["opencode"], model: "big-pickle" },
-       { providers: ["anthropic", "github-copilot", "opencode"], model: "claude-sonnet-4-6" },
      ],
    },
   explore: {