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BILLU BHAIYA · FREE GUIDE

AI Agent: Demo se Production tak

6 fixes + copy-paste code — demo ek script hai, production ek poora system.

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6 fixes, ek nazar mein

  1. 1Memory — LangGraph + Postgres checkpointer, pgvector
  2. 2Queue — FastAPI job_id → Redis → Celery worker
  3. 3Reliability — retries, backoff + jitter, idempotency, human approval
  4. 4Cost — prompt caching, Haiku vs Sonnet, LiteLLM budgets
  5. 5Security — prompt injection, Pydantic, sandbox, secrets
  6. 6Evals + Observability — Langfuse, promptfoo in CI
  7. ★Deploy — Docker + Railway, "laptop band" test

Poora guide (11 pages)

Cover: AI Agent — Demo se Production tak Laptop band karo test aur poora stack Fix 1: Memory with LangGraph, Postgres and pgvector Fix 2: Queue with FastAPI, Redis and Celery Fix 3: Reliability with retries, backoff and jitter Fix 3 part 2: Stripe idempotency and human-in-the-loop Fix 4: Cost control with prompt caching, model routing and budgets Fix 5: Security against prompt injection Fix 6: Evals and observability with Langfuse and promptfoo Deploy with Docker and Railway, laptop band test Demo vs Production comparison
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