Add OpenCode provider integration and strict model selection

packages/adapters/opencode-local/src/server/parse.test.ts

@@ -0,0 +1,50 @@
+import { describe, expect, it } from "vitest";
+import { parseOpenCodeJsonl, isOpenCodeUnknownSessionError } from "./parse.js";
+
+describe("parseOpenCodeJsonl", () => {
+  it("parses assistant text, usage, cost, and errors", () => {
+    const stdout = [
+      JSON.stringify({
+        type: "text",
+        sessionID: "session_123",
+        part: { text: "Hello from OpenCode" },
+      }),
+      JSON.stringify({
+        type: "step_finish",
+        sessionID: "session_123",
+        part: {
+          reason: "done",
+          cost: 0.0025,
+          tokens: {
+            input: 120,
+            output: 40,
+            reasoning: 10,
+            cache: { read: 20, write: 0 },
+          },
+        },
+      }),
+      JSON.stringify({
+        type: "error",
+        sessionID: "session_123",
+        error: { message: "model unavailable" },
+      }),
+    ].join("\n");
+
+    const parsed = parseOpenCodeJsonl(stdout);
+    expect(parsed.sessionId).toBe("session_123");
+    expect(parsed.summary).toBe("Hello from OpenCode");
+    expect(parsed.usage).toEqual({
+      inputTokens: 120,
+      cachedInputTokens: 20,
+      outputTokens: 50,
+      costUsd: 0.0025,
+    });
+    expect(parsed.errorMessage).toContain("model unavailable");
+  });
+
+  it("detects unknown session errors", () => {
+    expect(isOpenCodeUnknownSessionError("Session not found: s_123", "")).toBe(true);
+    expect(isOpenCodeUnknownSessionError("", "unknown session id")).toBe(true);
+    expect(isOpenCodeUnknownSessionError("all good", "")).toBe(false);
+  });
+});