feat(converters): centralize model field normalization across targets (#442)

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/model-utils.test.ts

@@ -0,0 +1,75 @@
+import { describe, expect, test } from "bun:test"
+import {
+  resolveClaudeFamilyAlias,
+  normalizeModelWithProvider,
+  addProviderPrefix,
+  CLAUDE_FAMILY_ALIASES,
+} from "../src/utils/model"
+
+describe("resolveClaudeFamilyAlias", () => {
+  test("resolves bare aliases to full Claude model names", () => {
+    expect(resolveClaudeFamilyAlias("haiku")).toBe("claude-haiku-4-5")
+    expect(resolveClaudeFamilyAlias("sonnet")).toBe("claude-sonnet-4-6")
+    expect(resolveClaudeFamilyAlias("opus")).toBe("claude-opus-4-6")
+  })
+
+  test("passes through non-alias model names unchanged", () => {
+    expect(resolveClaudeFamilyAlias("claude-sonnet-4-20250514")).toBe("claude-sonnet-4-20250514")
+    expect(resolveClaudeFamilyAlias("gpt-5.4")).toBe("gpt-5.4")
+    expect(resolveClaudeFamilyAlias("anthropic/claude-opus")).toBe("anthropic/claude-opus")
+  })
+})
+
+describe("addProviderPrefix", () => {
+  test("prefixes Claude models with anthropic/", () => {
+    expect(addProviderPrefix("claude-sonnet-4-6")).toBe("anthropic/claude-sonnet-4-6")
+    expect(addProviderPrefix("claude-haiku-4-5")).toBe("anthropic/claude-haiku-4-5")
+  })
+
+  test("prefixes OpenAI models with openai/", () => {
+    expect(addProviderPrefix("gpt-5.4")).toBe("openai/gpt-5.4")
+    expect(addProviderPrefix("o3-mini")).toBe("openai/o3-mini")
+  })
+
+  test("prefixes Google models with google/", () => {
+    expect(addProviderPrefix("gemini-2.0")).toBe("google/gemini-2.0")
+  })
+
+  test("prefixes Qwen models with qwen/", () => {
+    expect(addProviderPrefix("qwen-max")).toBe("qwen/qwen-max")
+    expect(addProviderPrefix("qwen-3.5-plus")).toBe("qwen/qwen-3.5-plus")
+  })
+
+  test("defaults unknown models to anthropic/ prefix", () => {
+    expect(addProviderPrefix("some-model")).toBe("anthropic/some-model")
+  })
+
+  test("passes through already-prefixed models unchanged", () => {
+    expect(addProviderPrefix("anthropic/claude-opus")).toBe("anthropic/claude-opus")
+    expect(addProviderPrefix("openai/gpt-5.4")).toBe("openai/gpt-5.4")
+    expect(addProviderPrefix("google/gemini-2.0")).toBe("google/gemini-2.0")
+  })
+})
+
+describe("normalizeModelWithProvider", () => {
+  test("resolves bare aliases and adds provider prefix", () => {
+    expect(normalizeModelWithProvider("sonnet")).toBe("anthropic/claude-sonnet-4-6")
+    expect(normalizeModelWithProvider("haiku")).toBe("anthropic/claude-haiku-4-5")
+    expect(normalizeModelWithProvider("opus")).toBe("anthropic/claude-opus-4-6")
+  })
+
+  test("adds provider prefix to full Claude model names", () => {
+    expect(normalizeModelWithProvider("claude-sonnet-4-20250514")).toBe("anthropic/claude-sonnet-4-20250514")
+  })
+
+  test("passes through already-prefixed models unchanged", () => {
+    expect(normalizeModelWithProvider("anthropic/claude-opus")).toBe("anthropic/claude-opus")
+    expect(normalizeModelWithProvider("google/gemini-2.0")).toBe("google/gemini-2.0")
+  })
+})
+
+describe("exported constants", () => {
+  test("CLAUDE_FAMILY_ALIASES covers all three tiers", () => {
+    expect(Object.keys(CLAUDE_FAMILY_ALIASES)).toEqual(["haiku", "sonnet", "opus"])
+  })
+})