new initial commit (history rewritten)

utils/toolSchemaCache.ts

@@ -0,0 +1,26 @@
+import type { BetaTool } from '@anthropic-ai/sdk/resources/beta/messages/messages.mjs'
+
+// Session-scoped cache of rendered tool schemas. Tool schemas render at server
+// position 2 (before system prompt), so any byte-level change busts the entire
+// ~11K-token tool block AND everything downstream. GrowthBook gate flips
+// (tengu_tool_pear, tengu_fgts), MCP reconnects, or dynamic content in
+// tool.prompt() all cause this churn. Memoizing per-session locks the schema
+// bytes at first render — mid-session GB refreshes no longer bust the cache.
+//
+// Lives in a leaf module so auth.ts can clear it without importing api.ts
+// (which would create a cycle via plans→settings→file→growthbook→config→
+// bridgeEnabled→auth).
+type CachedSchema = BetaTool & {
+  strict?: boolean
+  eager_input_streaming?: boolean
+}
+
+const TOOL_SCHEMA_CACHE = new Map<string, CachedSchema>()
+
+export function getToolSchemaCache(): Map<string, CachedSchema> {
+  return TOOL_SCHEMA_CACHE
+}
+
+export function clearToolSchemaCache(): void {
+  TOOL_SCHEMA_CACHE.clear()
+}