---
schema_version: "newruntime-agent-readable-v0.2"
type: "raw_signal"
stable_id: "signal:effective-harnesses-for-long-running-agents"
id: "tg-858"
slug: "effective-harnesses-for-long-running-agents"
title: "Effective harnesses for long-running agents"
description: "The archive captures Effective harnesses for long-running agents as a dated public record from Anthropic / Effective Harnesses For Long Running Agents. It documents evaluation, review, and observability becoming the bottleneck after generation accelerates and is retained as supporting evidence for the verification bandwidth trend."
retrieval_nugget: "The archive captures Effective harnesses for long-running agents as a dated public record from Anthropic / Effective Harnesses For Long Running Agents. It documents evaluation, review, and observability becoming the bottleneck after generation accelerates and is retained as supporting evidence for the verification bandwidth trend."
observed_at: "2025-11-27"
record_date: "2025-11-27"
date_kind: "observed_at"
why_it_matters: "This dated record strengthens the verification bandwidth thesis by documenting evaluation, review, and observability becoming the bottleneck after generation accelerates. It keeps the trend review tied to public evidence instead of treating the item as an isolated release note."
novelty: "notable"
verification_level: "source-linked"
signal_type: "research"
evidence_kind: "primary-source"
status: "published"
source_platform: "telegram"
source_record_id: "TG-858"
source_url: "https://t.me/qwgai/858"
telegram_message_id: 858
telegram_url: "https://t.me/qwgai/858"
topics: ["evals","verification","observability","agent-protocols","mcp","interoperability","agents"]
entities: []
related_patterns: ["verification-bandwidth-is-the-scarce-resource","agent-protocols-become-interoperability-layer","agent-ready-software-exposes-capabilities"]
source_urls: ["https://anthropic.com/engineering/effective-harnesses-for-long-running-agents"]
import_batch: "telegram-2026-07-24-trend-prism-v1"
routes: {"html":"https://newruntime.com/signals/effective-harnesses-for-long-running-agents/","markdown":"https://newruntime.com/signals/effective-harnesses-for-long-running-agents.md","json":"https://newruntime.com/signals/effective-harnesses-for-long-running-agents.json"}
source_format: "telegram-export-normalized-json"
---

# Effective harnesses for long-running agents

## Retrieval answer

The archive captures Effective harnesses for long-running agents as a dated public record from Anthropic / Effective Harnesses For Long Running Agents. It documents evaluation, review, and observability becoming the bottleneck after generation accelerates and is retained as supporting evidence for the verification bandwidth trend.

## Observation

The archive captures Effective harnesses for long-running agents as a dated public record from Anthropic / Effective Harnesses For Long Running Agents. It documents evaluation, review, and observability becoming the bottleneck after generation accelerates and is retained as supporting evidence for the verification bandwidth trend.

## Why it matters

This dated record strengthens the verification bandwidth thesis by documenting evaluation, review, and observability becoming the bottleneck after generation accelerates. It keeps the trend review tied to public evidence instead of treating the item as an isolated release note.

## Provenance

This public record is an English normalization of QWG AI Telegram message 858. The complete original-language post remains the canonical raw message.