feat: enhance CommandCode integration with improved message handling

open-sse/translator/request/openai-to-commandcode.js

@@ -1,17 +1,32 @@
 /**
  * OpenAI → CommandCode request translator
  *
- * CommandCode endpoint expects an envelope:
- *   { threadId, memory, config, params: { model, messages, stream, max_tokens, temperature, tools? } }
- * where `params.messages` are Anthropic-style content blocks ([{type:"text", text}, ...]).
- *
- * The model id received here is the upstream id (e.g. "deepseek/deepseek-v4-pro") thanks to the
- * `provider/model` registration in providerModels.js.
+ * Upstream `/alpha/generate` schema (verified live with curl 2026-05-07):
+ *  - params.system: STRING at top level (Anthropic-style; system messages NOT allowed in messages[])
+ *  - params.messages[*].role ∈ {"user","assistant","tool"}
+ *  - params.messages[*].content: Array of content blocks (NEVER a string)
+ *  - tool_use blocks (assistant): {type:"tool-call", toolCallId, toolName, input}
+ *  - tool_result blocks (role=user): {type:"tool-result", toolCallId, toolName, output}
+ *  - tools[*]: Anthropic plain {name, description, input_schema}
  */
 import { register } from "../index.js";
 import { FORMATS } from "../formats.js";
 import { randomUUID } from "crypto";
 
+function flattenText(content) {
+  if (content == null) return "";
+  if (typeof content === "string") return content;
+  if (Array.isArray(content)) {
+    const parts = [];
+    for (const p of content) {
+      if (typeof p === "string") parts.push(p);
+      else if (p && typeof p === "object" && typeof p.text === "string") parts.push(p.text);
+    }
+    return parts.join("\n");
+  }
+  return String(content);
+}
+
 function toContentBlocks(content) {
   if (content == null) return [{ type: "text", text: "" }];
   if (typeof content === "string") return [{ type: "text", text: content }];
@@ -24,8 +39,6 @@ function toContentBlocks(content) {
         if (part.type === "text" && typeof part.text === "string") {
           blocks.push({ type: "text", text: part.text });
         } else if (part.type === "image_url" || part.type === "image") {
-          // CommandCode currently rejects multimodal blocks via this gateway;
-          // collapse to a textual placeholder so the request still validates.
           blocks.push({ type: "text", text: "[image omitted]" });
         } else if (typeof part.text === "string") {
           blocks.push({ type: "text", text: part.text });
@@ -37,25 +50,101 @@ function toContentBlocks(content) {
   return [{ type: "text", text: String(content) }];
 }
 
+function safeParseJson(s) {
+  if (s == null) return {};
+  if (typeof s !== "string") return s;
+  try { return JSON.parse(s); } catch { return {}; }
+}
+
 function convertMessages(messages = []) {
-  return messages.map((m) => {
-    const role = m.role === "tool" ? "user" : (m.role || "user");
-    return { role, content: toContentBlocks(m.content) };
-  });
+  const out = [];
+  const systemTexts = [];
+
+  for (const m of messages) {
+    if (!m) continue;
+    const role = m.role;
+
+    if (role === "system") {
+      const t = flattenText(m.content);
+      if (t) systemTexts.push(t);
+      continue;
+    }
+
+    if (role === "tool") {
+      const value = typeof m.content === "string" ? m.content : flattenText(m.content);
+      out.push({
+        role: "tool",
+        content: [{
+          type: "tool-result",
+          toolCallId: m.tool_call_id || "",
+          toolName: m.name || "",
+          output: { type: "text", value },
+        }],
+      });
+      continue;
+    }
+
+    if (role === "assistant") {
+      const blocks = [];
+      const text = flattenText(m.content);
+      if (text) blocks.push({ type: "text", text });
+      if (Array.isArray(m.tool_calls)) {
+        for (const tc of m.tool_calls) {
+          const fn = tc.function || {};
+          blocks.push({
+            type: "tool-call",
+            toolCallId: tc.id || "",
+            toolName: fn.name || "",
+            input: safeParseJson(fn.arguments),
+          });
+        }
+      }
+      out.push({ role: "assistant", content: blocks.length ? blocks : [{ type: "text", text: "" }] });
+      continue;
+    }
+
+    out.push({ role: "user", content: toContentBlocks(m.content) });
+  }
+
+  return { messages: out, system: systemTexts.join("\n\n") };
+}
+
+function convertTools(tools) {
+  if (!Array.isArray(tools) || tools.length === 0) return undefined;
+  const result = [];
+  for (const t of tools) {
+    if (!t) continue;
+    if (t.type === "function" && t.function) {
+      result.push({
+        name: t.function.name,
+        description: t.function.description,
+        input_schema: t.function.parameters || { type: "object" },
+      });
+    } else if (t.name && (t.input_schema || t.parameters)) {
+      result.push({
+        name: t.name,
+        description: t.description,
+        input_schema: t.input_schema || t.parameters,
+      });
+    }
+  }
+  return result.length ? result : undefined;
 }
 
 export function openaiToCommandCode(model, body, stream /* , credentials */) {
+  const { messages, system } = convertMessages(body.messages);
   const params = {
     model,
-    messages: convertMessages(body.messages),
+    messages,
     stream: stream !== false,
     max_tokens: body.max_tokens ?? body.max_output_tokens ?? 64000,
     temperature: body.temperature ?? 0.3,
   };
 
-  if (Array.isArray(body.tools) && body.tools.length > 0) {
-    params.tools = body.tools;
-  }
+  if (system) params.system = system;
+
+  const tools = convertTools(body.tools);
+  if (tools) params.tools = tools;
   if (body.top_p != null) params.top_p = body.top_p;
 
   const today = new Date().toISOString().slice(0, 10);