---
schema_version: "newruntime-agent-readable-v0.2"
type: "raw_signal"
stable_id: "signal:langfuse-com-build-custom-evals-they-say"
id: "x-2079953168562069879"
slug: "langfuse-com-build-custom-evals-they-say"
title: "langfuse.com: \"Build custom evals,\" they say."
description: "A public X post from langfuse.com with a linked primary source flags \"Build custom evals,\" they say. Yes, but \"custom\" doesn't mean \"from scratch.\" We built a demo docs chatbot and connected it to a public Langfuse instance. Check out and copy how..."
retrieval_nugget: "A public X post from langfuse.com with a linked primary source flags \"Build custom evals,\" they say. Yes, but \"custom\" doesn't mean \"from scratch.\" We built a demo docs chatbot and connected it to a public Langfuse instance. Check out and copy how..."
observed_at: "2026-07-22"
record_date: "2026-07-22"
date_kind: "observed_at"
why_it_matters: "This X-discovered record adds fresh evidence to the goal scoped loops replace manual continuation, model answers become task interfaces lens and lets the site trend graph move as public product and research signals arrive."
novelty: "structural"
verification_level: "source-linked"
signal_type: "research"
evidence_kind: "creator-source"
status: "published"
source_platform: "x"
source_record_id: "2079953168562069879"
source_url: "https://x.com/langfuse/status/2079953168562069879"
topics: ["agents","interfaces","evals","ai"]
entities: ["langfuse.com"]
related_patterns: ["goal-scoped-loops-replace-manual-continuation","model-answers-become-task-interfaces","skills-become-portable-capability-layer","verification-bandwidth-is-the-scarce-resource"]
source_urls: ["https://x.com/langfuse/status/2079953168562069879","https://cloud.langfuse.com/project/clkpwwm0m000gmm094odg11gi"]
import_batch: "x-analyzer-20260723-first-controlled-all-unique"
routes: {"html":"https://newruntime.com/signals/langfuse-com-build-custom-evals-they-say/","markdown":"https://newruntime.com/signals/langfuse-com-build-custom-evals-they-say.md","json":"https://newruntime.com/signals/langfuse-com-build-custom-evals-they-say.json"}
source_format: "x-api-normalized-json"
---

# langfuse.com: "Build custom evals," they say.

## Retrieval answer

A public X post from langfuse.com with a linked primary source flags "Build custom evals," they say. Yes, but "custom" doesn't mean "from scratch." We built a demo docs chatbot and connected it to a public Langfuse instance. Check out and copy how...

## Observation

A public X post from langfuse.com with a linked primary source flags "Build custom evals," they say. Yes, but "custom" doesn't mean "from scratch." We built a demo docs chatbot and connected it to a public Langfuse instance. Check out and copy how...

## Why it matters

This X-discovered record adds fresh evidence to the goal scoped loops replace manual continuation, model answers become task interfaces lens and lets the site trend graph move as public product and research signals arrive.

## Provenance

This public record is an English normalization of an approved X watchlist post. Linked source_urls carry the publishable evidence boundary.