Harness Lens catalogs 17 open-source agent harnesses, system prompts and compaction methods

yb2698 · x · 2026-10-21

A new project called Harness Lens aggregates 17 open-source agent harnesses, along with a registry of existing tools, their system prompts, and context compaction methods.

For developers studying how mainstream coding agents organize tool calls and manage context, it's a rare side-by-side reference; the author walks through the details in a thread.

Related event: Harness Lens Launches to Compare Coding Agent Prompts and Tools Side by Side(4 posts)→

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