opencode chat backend

packages/backend/src/routes/ai/opencode.ts

@@ -0,0 +1,65 @@
+export type AIResponse = {
+    text: string;
+    highlighted_issues: number[];
+    suggested_actions: string[] | null;
+    raw: string;
+};
+
+export const callAI = async (prompt: string): Promise<AIResponse> => {
+    const result = Bun.spawn(["opencode", "run", prompt, "--model", "opencode/kimi-k2.5-free"], {
+        stdout: "pipe",
+        stderr: "pipe",
+    });
+
+    // Collect all output
+    let rawOutput = "";
+    for await (const chunk of result.stdout) {
+        rawOutput += new TextDecoder().decode(chunk);
+    }
+
+    let stderrOutput = "";
+    for await (const chunk of result.stderr) {
+        stderrOutput += new TextDecoder().decode(chunk);
+    }
+
+    await result.exited;
+
+    try {
+        const jsonMatch = rawOutput.match(/\{[\s\S]*\}/);
+        const jsonStr = jsonMatch ? jsonMatch[0] : rawOutput;
+
+        const response = JSON.parse(jsonStr);
+
+        if (!response.text || !Array.isArray(response.highlighted_issues)) {
+            throw new Error("Invalid response structure");
+        }
+
+        const output = {
+            text: response.text,
+            highlighted_issues: response.highlighted_issues,
+            suggested_actions: response.suggested_actions || [],
+            raw: rawOutput,
+        };
+
+        return output;
+    } catch (e) {
+        console.log(
+            JSON.stringify(
+                {
+                    error: "Failed to parse AI response as JSON",
+                    parse_error: e instanceof Error ? e.message : String(e),
+                    raw: rawOutput,
+                    stderr: stderrOutput,
+                },
+                null,
+                2,
+            ),
+        );
+        return {
+            text: "Sorry, an error occurred while processing the AI response.",
+            highlighted_issues: [],
+            suggested_actions: [],
+            raw: rawOutput,
+        };
+    }
+};