Better Harness plugin for Codex
Build an AI-ready engineering system for safe coding-agent delivery and continuous software improvement.
How to install Better Harness in Codex
The repo has a Codex plugin manifest (.codex-plugin/plugin.json) but no marketplace file, so there's no one-line install. Follow the install steps in the repo README.
What it contains
The plugin manifest doesn't list components inline. See the repo.
Example prompts from the manifest
- Evaluate this repository's AI delivery readiness.
- Draft a repair plan for a Harness finding.
- Analyze this project's coding-agent workflow.
About this listing
Better Harness is a community plugin on GitHub by QoderAI. Its README documents a Codex install and the repo ships a Codex plugin manifest. It passed the CodexStacks quality filter for repos found this way (at least 500 stars, pushed in the last 90 days, not a fork or a list). OpenAI hasn't reviewed it and we haven't tested it. The manifest says version 0.7.0-alpha2. It's one of 36 listings in the Creativity category (category assigned by CodexStacks from the repo's topics and description).
Stacks Weekly: every new Codex and Grok Build plugin, every Tuesday.
One short email for GrokStacks and CodexStacks readers, with each new plugin's install line and what it ships. Subscribe and get the free starter list: 20 Codex plugins worth installing first.
You'll get a confirmation email first. Unsubscribe anytime.
Better Harness FAQ
How do I install Better Harness in Codex?
It has a Codex plugin manifest but no marketplace file, so there's no one-line install. Follow the install steps in the repo README.
Is Better Harness an official Codex plugin?
No. Better Harness is a community repo on GitHub by QoderAI. It passed the CodexStacks quality filter, but OpenAI hasn't reviewed it and we haven't tested it, so read the code before you install it.
What does Better Harness include?
The plugin manifest doesn't list components inline. See the repo.
Details
- Type
- Plugin
- Category
- Creativity (assigned by us)
- Source
- Community
- Author
- Qoder
- Version
- 0.7.0-alpha2
- License
- MIT
- GitHub stars
- 2,386 (at last sync)
- Last push
- 2026-10-15
- Manifest
.codex-plugin/plugin.json- GitHub topics
- agent-plugin, claude-code, cursor, harness-design, harness-engineering, loop-engineering, qoder, skill
- Source
- https://github.com/QoderAI/better-harness
- Website
- https://qoderai.github.io/better-harness/
- Listed via
- GitHub search: README documents a Codex install
- Tested by CodexStacks
- Not yet
Something wrong or missing? Submit or improve this listing. Listings also refresh automatically every night.
For maintainers: badge and embeds
Maintain Better Harness? Add the badge; it links to this page.
Markdown
[](https://codexstacks.com/p/better-harness/)HTML
<a href="https://codexstacks.com/p/better-harness/"><img src="https://codexstacks.com/badge.svg" alt="Listed on CodexStacks" width="172" height="28"></a>Embed card (static HTML and inline CSS, no JavaScript). Preview:
<a href="https://codexstacks.com/p/better-harness/" style="display:block;max-width:380px;box-sizing:border-box;padding:14px 16px;border:1px solid #3a2c26;border-radius:12px;background:#0d0b0a;color:#f3ece6;font:14px/1.45 -apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;text-decoration:none"><span style="display:block;font-size:16px;font-weight:700;color:#f3ece6">Better Harness</span><span style="display:block;margin:2px 0 8px;font-size:12px;color:#b5a9a1">Community Codex plugin</span><span style="display:block;margin:0 0 10px;color:#ddd3cc">Build an AI-ready engineering system for safe coding-agent delivery and continuous software improvement.</span><span style="font-size:12px;font-weight:600;color:#ffb347">View on CodexStacks →</span></a>Markdown summary
**[Better Harness on CodexStacks](https://codexstacks.com/p/better-harness/)**: Community Codex plugin.More on badges, embeds and keeping your listing up to date: CodexStacks for plugin authors.
Also in Creativity
Taste Skill
tasteskill v2: art direction for coding agents, plus image-to-code, redesign, image-generation and style skills.
Diagram Design
Architecture, architecture delta, IT current-state, flowchart, sequence, state machine, ER/data model, timeline, swimlane, quadrant, radar/spider, polar, loop, nested, tree, org chart, layer stack, exploded/plan, Venn, pyramid/funnel, bar, waterfall, treemap, heatmap, line, Gantt, scatter, high-level, process, medallion, data flow, DP integration, DP security matrix, Sankey, fishbone, Wardley map, kanban, journey, deployment, dependency, blueprint, UML class, story map, schema, lifecycle phase.
text-to-cad
The text-to-cad plugin gives your agent local workflows for generating 3D models as STEP, GLB, STL or 3MF files. It also does design for manufacturing checks, generates engineering drawings, and connects to popular 3D printing, sheet metal and CNC fabrication services.
nuclear
Streaming music player that finds free music for you
gitdiagram
Visualize any GitHub codebase: free interactive architecture diagrams and one-minute explainer videos. Replace 'hub' with 'diagram' in any GitHub URL.
palmier-pro
macOS video editor built for AI