refactor(open-sse): translator DRY + schema enums, bug fixes, dead code cleanup

- Bug B1-B7: media UI m.kind||m.type, serviceKinds, gemini mediaPriority, schema kind, models/info lookup by kind
- Dead code D1-D6: safeParseJSON, drop PROVIDER_ENDPOINTS, orphan fetcher, GITHUB_CONFIG derive, getProviderConfig internal, legacy kiro file
- Translator concerns: toOpenAIUsage, toOpenAIFinish (gemini/kiro/ollama + fix kiro tool finish), thinking effort maps
- Reorg helpers/ → concerns/ (logic) + formats/ (per-format) + schema/ (pure enums: roles/blocks/finishReasons/defaults)
- Wire ~280 hardcoded role/block/finish/default literals to schema enums across 20+ files
- collapseTextParts + extractTextContent dedup
- Normalize translator fn names to openaiToXRequest / xToOpenAIResponse
- Golden tests lock behavior; 0 regression (byte-for-byte providers/alias, 26=26 known fails)

Co-authored-by: Cursor <cursoragent@cursor.com>

open-sse/translator/concerns/toolCall.js

@@ -0,0 +1,153 @@
+// Tool call helper functions for translator
+
+// Anthropic tool_use.id must match: ^[a-zA-Z0-9_-]+$
+const TOOL_ID_PATTERN = /^[a-zA-Z0-9_-]+$/;
+
+// Fallback streaming tool_call id when provider omits one (index optional)
+export function fallbackToolCallId(index) {
+  return index === undefined ? `call_${Date.now()}` : `call_${index}_${Date.now()}`;
+}
+
+// Generate deterministic tool call ID from position + tool name (cache-friendly)
+export function generateToolCallId(msgIndex = 0, tcIndex = 0, toolName = "") {
+  const name = toolName ? `_${toolName.replace(/[^a-zA-Z0-9_-]/g, "")}` : "";
+  return `call_msg${msgIndex}_tc${tcIndex}${name}`;
+}
+
+// Sanitize ID to match Anthropic pattern: keep only alphanumeric, underscore, hyphen
+function sanitizeToolId(id) {
+  if (!id || typeof id !== "string") return null;
+  const sanitized = id.replace(/[^a-zA-Z0-9_-]/g, "");
+  return sanitized.length > 0 ? sanitized : null;
+}
+
+// Ensure all tool_calls have valid id field and arguments is string (some providers require it)
+export function ensureToolCallIds(body) {
+  if (!body.messages || !Array.isArray(body.messages)) return body;
+
+  for (let i = 0; i < body.messages.length; i++) {
+    const msg = body.messages[i];
+    if (msg.role === "assistant" && msg.tool_calls && Array.isArray(msg.tool_calls)) {
+      for (let j = 0; j < msg.tool_calls.length; j++) {
+        const tc = msg.tool_calls[j];
+        // Validate or regenerate ID for Anthropic compatibility
+        if (!tc.id || !TOOL_ID_PATTERN.test(tc.id)) {
+          const sanitized = sanitizeToolId(tc.id);
+          tc.id = sanitized || generateToolCallId(i, j, tc.function?.name);
+        }
+        if (!tc.type) {
+          tc.type = "function";
+        }
+        // Ensure arguments is JSON string, not object
+        if (tc.function?.arguments && typeof tc.function.arguments !== "string") {
+          tc.function.arguments = JSON.stringify(tc.function.arguments);
+        }
+      }
+    }
+
+    // Validate tool_call_id in tool messages (role: "tool")
+    if (msg.role === "tool" && msg.tool_call_id && !TOOL_ID_PATTERN.test(msg.tool_call_id)) {
+      const sanitized = sanitizeToolId(msg.tool_call_id);
+      msg.tool_call_id = sanitized || generateToolCallId(i, 0);
+    }
+
+    // Also validate tool_use blocks in content (Claude format)
+    if (Array.isArray(msg.content)) {
+      for (let k = 0; k < msg.content.length; k++) {
+        const block = msg.content[k];
+        if (block.type === "tool_use" && block.id && !TOOL_ID_PATTERN.test(block.id)) {
+          const sanitized = sanitizeToolId(block.id);
+          block.id = sanitized || generateToolCallId(i, k, block.name);
+        }
+        // Validate tool_use_id in tool_result blocks
+        if (block.type === "tool_result" && block.tool_use_id && !TOOL_ID_PATTERN.test(block.tool_use_id)) {
+          const sanitized = sanitizeToolId(block.tool_use_id);
+          block.tool_use_id = sanitized || generateToolCallId(i, k);
+        }
+      }
+    }
+  }
+
+  return body;
+}
+
+// Get tool_call ids from assistant message (OpenAI format: tool_calls, Claude format: tool_use in content)
+export function getToolCallIds(msg) {
+  if (msg.role !== "assistant") return [];
+
+  const ids = [];
+
+  // OpenAI format: tool_calls array
+  if (msg.tool_calls && Array.isArray(msg.tool_calls)) {
+    for (const tc of msg.tool_calls) {
+      if (tc.id) ids.push(tc.id);
+    }
+  }
+
+  // Claude format: tool_use blocks in content
+  if (Array.isArray(msg.content)) {
+    for (const block of msg.content) {
+      if (block.type === "tool_use" && block.id) {
+        ids.push(block.id);
+      }
+    }
+  }
+
+  return ids;
+}
+
+// Check if user message has tool_result for given ids (OpenAI format: role=tool, Claude format: tool_result in content)
+export function hasToolResults(msg, toolCallIds) {
+  if (!msg || !toolCallIds.length) return false;
+
+  // OpenAI format: role = "tool" with tool_call_id
+  if (msg.role === "tool" && msg.tool_call_id) {
+    return toolCallIds.includes(msg.tool_call_id);
+  }
+
+  // Claude format: tool_result blocks in user message content
+  if (msg.role === "user" && Array.isArray(msg.content)) {
+    for (const block of msg.content) {
+      if (block.type === "tool_result" && toolCallIds.includes(block.tool_use_id)) {
+        return true;
+      }
+    }
+  }
+
+  return false;
+}
+
+// Fix missing tool responses - insert empty tool_result if assistant has tool_use but next message has no tool_result
+export function fixMissingToolResponses(body) {
+  if (!body.messages || !Array.isArray(body.messages)) return body;
+
+  const newMessages = [];
+
+  for (let i = 0; i < body.messages.length; i++) {
+    const msg = body.messages[i];
+    const nextMsg = body.messages[i + 1];
+
+    newMessages.push(msg);
+
+    // Check if this is assistant with tool_calls/tool_use
+    const toolCallIds = getToolCallIds(msg);
+    if (toolCallIds.length === 0) continue;
+
+    // Check if next message has tool_result
+    if (nextMsg && !hasToolResults(nextMsg, toolCallIds)) {
+      // Insert tool responses for each tool_call
+      for (const id of toolCallIds) {
+        // OpenAI format: role = "tool"
+        newMessages.push({
+          role: "tool",
+          tool_call_id: id,
+          content: ""
+        });
+      }
+    }
+  }
+
+  body.messages = newMessages;
+  return body;
+}
+