fix(catalog): advertise Muse Spark image input on OpenCode Go

src/providers/registry.ts

@@ -1409,6 +1409,11 @@ export const PROVIDER_REGISTRY: readonly ProviderRegistryEntry[] = [
       [OPENCODE_OX_ALPHA_FREE_MODEL]: ["text", "image"],
       // Experimental DeepSeek vision preview — expected to merge into deepseek-v4-flash later.
       [DEEPSEEK_VISION_PREVIEW_MODEL]: ["text", "image"],
+      // Muse Spark 1.2 Contributor is natively multimodal on Zen Go: it accepts input_image
+      // parts over /responses (probed 2026-08-26). Without this declaration the catalog
+      // advertises it text-only and the Codex app blocks image attachments client-side with
+      // "This model does not support image inputs" before the request ever reaches the proxy.
+      "muse-spark-1.2-contributor": ["text", "image"],
     },
     modelReasoningEfforts: {
       "gpt-5.6-luna": OPENAI_API_GPT56_REASONING_EFFORTS,

tests/opencode-go-muse-vision.test.ts

@@ -0,0 +1,51 @@
+/**
+ * OpenCode Go Muse Spark 1.2 Contributor multimodal regression.
+ *
+ * Muse Spark answers /responses on Zen Go and accepts input_image parts, but the
+ * registry declared no modelInputModalities for it, so the Codex catalog advertised
+ * it text-only. The app gates image attachments client-side on input_modalities,
+ * so a text-only entry blocks images ("This model does not support image inputs")
+ * before the request ever reaches the proxy. These tests lock the declaration in
+ * and prove the catalog advertises image input for Muse.
+ */
+import { describe, expect, test } from "bun:test";
+import { applyProviderConfigHints } from "../src/codex/catalog";
+import { getProviderRegistryEntry, PROVIDER_REGISTRY } from "../src/providers/registry";
+import { providerConfigSeed } from "../src/providers/derive";
+import type { OcxProviderConfig } from "../src/types";
+
+const MUSE_MODEL = "muse-spark-1.2-contributor";
+
+/** Seeded OpenCode Go provider config for the Muse Spark vision assertions. */
+function opencodeGo(): OcxProviderConfig {
+  const entry = getProviderRegistryEntry("opencode-go");
+  if (!entry) throw new Error("missing opencode-go registry fixture");
+  return { ...providerConfigSeed(entry), apiKey: "test-key" };
+}
+
+describe("OpenCode Go Muse Spark image input (#vision)", () => {
+  test("registry declares Muse as text+image", () => {
+    const entry = PROVIDER_REGISTRY.find(e => e.id === "opencode-go");
+    expect(entry?.modelInputModalities?.[MUSE_MODEL]).toEqual(["text", "image"]);
+  });
+
+  test("the registry seed carries Muse as text+image", () => {
+    const prov = opencodeGo();
+    expect(prov.modelInputModalities?.[MUSE_MODEL]).toEqual(["text", "image"]);
+  });
+
+  test("applyProviderConfigHints advertises image input for Muse", () => {
+    const prov = opencodeGo();
+    const hinted = applyProviderConfigHints("opencode-go", prov, {
+      id: MUSE_MODEL,
+      provider: "opencode-go",
+    });
+    expect(hinted.inputModalities).toEqual(["text", "image"]);
+  });
+
+  test("Muse is NOT in noVisionModels (it is natively multimodal, not sidecar-only)", () => {
+    const prov = opencodeGo();
+    expect(prov.noVisionModels ?? []).not.toContain(MUSE_MODEL);
+    expect(prov.modelInputModalities?.[MUSE_MODEL]).toEqual(["text", "image"]);
+  });
+});