three-pillars vs harness
three-pillars is a plugin bundle for AI coding tools published by CurtisThe. Marketplaces we read that list it: 1 (Claude Code: claude-plugins-community). harness is a plugin bundle for AI coding tools published by revfactory. Marketplaces we read that list it: 1 (Claude Code: claude-plugins-community). As of our marketplace pass on 2026-10-12. 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 | ||
|---|---|---|
| Claude Code: claude-plugins-community | Listed Version: 2.3.0 Forks (GitHub): 1 Stars (GitHub): 4 Not marked · First seen |
Listed Version: 1.2.0 Forks (GitHub): 1 311 Stars (GitHub): 9 163 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 | three-pillars | harness |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 4 (worse) | 9 163 (better) |
| Forks (GitHub) (differs) | 1 (worse) | 1 311 (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 |
| Parts of the bundle (differs) | 58 | 1 |
| Licence | Apache-2.0 | Apache-2.0 |
| Repository (differs) | github.com/curtisthe/three-pillars-plugin | github.com/revfactory/harness |
| Changes in the last 7 days | 0 | 0 |
| First seen (differs) | 2026-10-12 | 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
three-pillars
Structured development framework for Claude Code with design-first pipelines, multi-persona deliberation, and session continuity. Includes a full TDD pipeline (design → detailed design → plan → implement → audit), a spike pipeline for hypothesis-driven experiments, a Council of 18 historical thinker personas for complex decisions, and session management for continuity across conversations. 23 skills, 18 agents.
harness
Harness leverages Claude Code's agent team system to decompose complex tasks into coordinated teams of specialized agents. Say "build a harness for this project" and it automatically generates agent definitions (.claude/agents/) and skills (.claude/skills/) tailored to your domain.
How to run each
three-pillars
No data for an automatic command: what its marketplaces declare does not say unambiguously how to connect it.
harness
No data for an automatic command: what its marketplaces declare does not say unambiguously how to connect it.
Commands 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: three-pillars · What it can do: harness · Compare two other plugins
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.