- lib/system-prompts.ts: delete the extended prompt kept only to reach
the 4096-token cache threshold of two old Claude models; describe the
current canvas-first UI in the App Features section
- app/api/chat/route.ts: remove the server-side example cache (the
browser answers examples itself), the ENABLE_HISTORY_XML_REPLACE
option and its helper, the unread messageMetadata fields; the
DEBUG_LLM_PAYLOAD blocks become one describeMessages summary
- app/api/log-feedback and log-save share scoreLatestTrace in
lib/langfuse.ts
- app/api/admin/test-model and validate-model call a shared
testModelConnection() instead of one route faking a request to the
other and passing trust through the body
- lib/dynamo-quota-manager.ts reads the failing item from the
conditional update instead of a second GetItem
- lib/ai-providers.ts: geminiThinkingOptions helper for the google and
vertexai cases, drop the unused fourth resolveBaseURL parameter
- edge-functions: always stream, shrink messageSchema, drop model
aliases nothing sends
- delete app/api/chat/xml_guide.md, parseOutputTokenLimit, unused type
exports and export keywords on file-internal symbols
- env.example: drop variables nothing reads, document the quota,
validation and analytics variables, mention the apiKeyEnv array form
(also in docs/*/ai-providers.md)
