https://eshagh.dev Eshagh — systems engineer, co-founder at Fenext (Istanbul). Production LLM pipelines, RAG and multi-role B2B platforms with explicit authority and audit trails. Next.js, PostgreSQL, pgvector, LiveKit. en https://eshagh.dev/blog/confidence-gatehttps://eshagh.dev/blog/confidence-gateA confidence gate is the rule set that decides whether a language model's extraction is allowed to reach a customer without a human. Automate the reading — classification and extraction — and keep a person on the deciding. Anything below the gate still gets acknowledged, then queued with the reason it was held.Sun, 26 Jul 2026 00:00:00 GMTAI systemshttps://eshagh.dev/blog/long-term-memoryhttps://eshagh.dev/blog/long-term-memoryStoring conversations is not memory. In a care platform for families raising autistic children, memory is three separate tables — what happened, what is generally true, and what has actually worked — with a scheduled job promoting events into patterns, effectiveness computed as arithmetic rather than model opinion, and every answer citing the family's own record.Sun, 26 Jul 2026 00:00:00 GMTAI systemshttps://eshagh.dev/blog/nl-to-sql-guardrailshttps://eshagh.dev/blog/nl-to-sql-guardrailsLetting recruiters ask questions in plain Turkish means letting a model write SQL against a multi-tenant database. The safety is not in the prompt — it is in a guardrail layer between generation and execution: an allow-listed schema, a forced LIMIT, rejected mutations, and a tenant filter bound as a parameter the model never sees.Sun, 26 Jul 2026 00:00:00 GMTAI systems