Endor Labs Agent Kit vs harness-kit
Endor Labs Agent Kit is a plugin bundle for AI coding tools published by endorlabs. Marketplaces we read that list it: 2 (Claude Code: claude-plugins-official, Claude Code: claude-plugins-community). harness-kit is a plugin bundle for AI coding tools published by romabeckman. Marketplaces we read that list it: 1 (Claude Code: claude-plugins-community). As of our marketplace pass on 2026-10-13. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.
Where each is published
| Marketplace |  Endor Labs Agent Kit |  harness-kit |
|---|---|---|
| Claude Code: claude-plugins-official | Listed Version: 2de0088 Forks (GitHub): 2 Stars (GitHub): 10 Not marked · First seen |
Not listed |
| Claude Code: claude-plugins-community | Listed Version: 1.0.0 Forks (GitHub): 2 Stars (GitHub): 10 Not marked · First seen |
Listed Version: 1.3.8 Forks (GitHub): 7 Stars (GitHub): 30 Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | Endor Labs Agent Kit | harness-kit |
|---|---|---|
| Marketplaces that list it (differs) | 2 (better) | 1 (worse) |
| Stars (GitHub) (differs) | 10 (worse) | 30 (better) |
| Forks (GitHub) (differs) | 2 (worse) | 7 (better) |
| Last release | Not published | Not published |
| Where it runs | Installs as a plugin bundle | Installs as a plugin bundle |
| Transport | Not stated | Not stated |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| Hooks it runs (differs) | 4 | Not published |
| Parts of the bundle (differs) | 15 | 19 |
| Licence | MIT | MIT |
| Repository (differs) | github.com/endorlabs/ai-plugins | github.com/romabeckman/harness-kit |
| Changes in the last 7 days | 0 | 0 |
| First seen | 2026-10-11 | 2026-10-11 |
Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.
What each says it does
Endor Labs Agent Kit
Set up endorctl and use Endor Labs to scan, prioritize, and fix security risks across your software supply chain
harness-kit
HarnessKit is a professional-grade engineering framework that empowers AI agents with a robust 'harness' of structured controls and specialized personas. Built on the principles of Harness Engineering, it enforces a disciplined development workflow—from domain-driven scope refinement to strict TDD implementation and Socratic technical reviews—ensuring your AI assistant maintains architectural integrity, comprehensive test coverage, and persistent project memory throughout the entire software lifecycle.
How to run each
Endor Labs Agent Kit As a Claude Code plugin
/plugin install ai-plugins@claude-plugins-officialharness-kit As a Claude Code plugin
/plugin marketplace add anthropics/claude-plugins-community
/plugin install harness-kit@claude-communityCommands built only from what the marketplaces declare; the full set for every client is on each card.
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
Neither one's marketplaces publish the settings it asks for.
What it can do: Endor Labs Agent Kit · What it can do: harness-kit · Compare two other plugins
Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-official/blob/HEAD/.claude-plugin/marketplace.json. Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-community/blob/HEAD/.claude-plugin/marketplace.json. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.