Sandbox
43 repos for engineering · Harnesses · TestingClear
FlyFission/
nuclear-grade-context-engineering

AI agents now operate with authority. Authority without discipline is how complex systems fail. Nuclear’s control loop, ported to AI-assisted software engineering.

33

Practical patterns, starters & CLI tools for loop engineering with AI coding agents. Design systems that prompt and orchestrate agents (inspired by Addy Osmani and Boris Cherny). Includes loop-audit, loop-init, loop-cost.

11k
digipulse-engineering/
GAAI-framework

Turns AI coding tools into reliable software delivery systems. Drop a .gaai/ folder into any project — Discovery defines what to build, Delivery executes autonomously until criteria pass. Works with Claude Code, Codex CLI, Gemini CLI, Cursor, and more. No SDK. No package. Markdown + YAML + bash.

160
deepklarity/
harness-kit

A kit for building with AI agents and also the engineering patterns around it.

97

Professional context and harness engineering for Claude Code and OpenAI Codex. Build production-grade software with spec-driven development, TDD, persistent memory, quality gates, code intelligence, human oversight, and end-to-end verification.

2.1k
MRCalderon3D/
everything-game-dev-code

A universal scaffold for AI-assisted game development. 42 agents, 51 commands, 86 skills. Multi-engine (Unity, Unreal, Godot, HTML). Multi-harness (Claude Code, Codex, Cursor, OpenCode, Kiro).

83
hoangnb24/
repository-harness

Turn any repo into an agent-ready workspace for Claude Code, Codex, Cursor, and other coding agents.

1.2k
striderZA/
OpenCodeGameStudios

Agentic game development taken to the next level: plan, build and test across major engines with any coding agent🤖

85
vdaubry/
bottega

Coding agent orchestration for engineering teams — shipped as a spec plus a working reference implementation.

84
arpitnath/
claude-capsule-kit

A toolkit that makes Claude Code better at engineering — session memory, dependency analysis, large file navigation, 18 specialist agents, and crew teams for parallel multi-branch work.

90
rpamis/cometHarnesses

Comet: agent skill harness for turning ideas into evaluated workflows

3k

Plinth is an AI-native engineering toolkit for modern Java enterprise SDLC, built around reusable Commands, Agents, Skills, and MCP Servers.

438
TheAstrelo/
Claude-Pipeline

Tool-agnostic 13-phase AI development pipeline — turns a task description into reviewed, committed code through automated design, adversarial review, security, test, and code-review gates. One bash engine, balanced Opus/Sonnet routing, self-healing commit review.

45
malevrigns/
atlas-agent-control-plane

AtlasAgent - an auditable AI agent control plane: evidence-backed memory, governed tool runtime, checkpoint DAG recovery, and a 55-chapter engineering tutorial. FastAPI / Next.js PWA / Textual TUI

110
addyosmani/
factory

A reference software factory for Claude Code and Codex

179
clawplays/
ospec

Spec-driven, agentic workflow framework for AI coding agents. Turn a request into a verifiable goal loop — plan, act, verify — with durable specs and evidence in your repo. Works with Claude Code, Codex, Gemini, OpenCode, and plain CLI.

485
jay7793/
solweaver

Solweaver: a Codex software team with GPT-5.6 Sol orchestrating Terra and Luna workers.

62
GammaLabTechnologies/
harmonist

Portable AI agent orchestration with mechanical protocol enforcement. 186 agents, zero runtime dependencies.

2.3k
joe960913/
Jixu

Durable single-Agent Harness for TypeScript: recoverable Threads, context continuity, explicit side effects, and a native TUI.

100
HenryZ838978/
deepseek-harness

Protocol-layer harness for DeepSeek: Python witness stack — posterior verification that keeps the protocol honest. dsh doctor --node probes included.

49