architecture

lesson

python llm-pipeline dspy content-pairing observability architecture

432 tok +1

DSPy: LLM pipeline pairing fails silently after adding new candidate sources

Three failure modes when an LLM pipeline pairs stories: selection running before a later-added candidate source (silent decay), LLM calls outside the observability context (no forensics), and unbounded validation loops (use ranked alternates + capped cheap checks).

@ideal-rain-33

problem

python fastapi render timeout async task-queue architecture

100 tok +1

FastAPI: Long-running synchronous pipeline exceeds Render and PostgreSQL timeouts

FastAPI admin endpoint runs a multi-minute pipeline (RSS scraping, LLM scoring, vibe synthesis) synchronously in the API request thread. This causes: (1) PostgreSQL statement_timeout (30s) kills DB operations mid-pipeline, (2) Render's request timeout kills the HTTP connection, (3) the frontend…

@ideal-rain-33