Stop fighting your coding agent.Give it an operating system.
Cleaner builds. Fewer regressions. Less context chaos.
Rules files and prompt systems for AI coding agents, built around scoped changes, stated assumptions, real testing, and clean handoffs, plus a wider catalog of prompt packs and Markdown systems, all forged overnight by an autonomous agent so the shelf updates itself.
Flagship
Claude Code Master Config Bundle
Most AI coding mistakes come down to three things: the agent assumes instead of asking, it overcomplicates a simple fix, or it edits code nobody asked it to touch. This bundle is the rules file that closes all three: scoped changes only, assumptions stated before code gets written, a real testing step before anything's called done, and clean handoffs so the next session (yours or another agent's) doesn't have to re-derive context from scratch. Stack-specific addendums included for TypeScript/Node, React/Next.js, Python/FastAPI, SQL, REST, and Git.
See full detailsSecure checkout · Instant download on payment
AI Coding Agent Project Starter Checklist
A small, copy-paste checklist for starting any project with a coding agent: scoped-change discipline, stating assumptions, a testing step, and a clean handoff note. Free preview of what's in the full bundle.
Active Inventory
Independent Reviewer & Scope-Creep Detector System Prompt Kit
Two system prompts for running a genuine second-opinion reviewer persona on AI-agent-written code — for developers on Claude Code, Cursor, Windsurf, or Copilot who want a real independent check before merging, not a self-review from the same context that wrote the code.
Agent Rules Linter
A single offline HTML tool that scores a CLAUDE.md, .cursor/rules, or AGENTS.md file against 12 checks tied to the concrete failure modes that make AI coding agents unreliable — for developers who already have a rules file and want to know if it's actually doing its job.
Vue 3.5 + Nuxt 4 + Nitro AI Config Bundle
A drop-in rules file that makes Claude Code, Cursor, Windsurf, and Copilot write Vue 3.5 and Nuxt 4 (Nitro) correctly instead of legacy Nuxt 3 structure and Vue 2 Options API.
Svelte 5 + SvelteKit 2 + Tailwind v4 AI Config Bundle
A drop-in rules file that makes Claude Code, Cursor, Windsurf, and Copilot write Svelte 5 (runes), SvelteKit 2, and Tailwind v4 correctly instead of legacy Svelte 4 syntax.
Archive · Still purchasable
Older drops
Claude Code Master Config Bundle
Battle-tested behavioral rules for Claude Code — fixes the three failure modes that cause most AI coding mistakes.
Supabase + Next.js App Router Bundle
A 1,017-line CLAUDE.md rules file that corrects the patterns AI models get wrong when building Supabase apps with Next.js App Router — covering auth, RLS, storage, realtime, and Edge Functions.
tRPC v11 + Next.js App Router Bundle
A 912-line CLAUDE.md rules file that fixes the v10→v11 migration mistakes AI models make when building tRPC APIs with Next.js App Router and React Query v5.
Drizzle ORM + Hono Cloudflare Workers Bundle
A complete CLAUDE.md rules file for building Cloudflare Workers APIs with Hono and Drizzle ORM — covers D1, KV, R2, RPC mode, and the 10 mistakes every model makes.
Hono + Cloudflare Workers Bundle
A complete CLAUDE.md rules file for Hono on Cloudflare Workers. Covers D1, KV, R2, Queues, RPC mode, middleware, and 8 mistakes every model makes.
Drizzle ORM Bundle
A complete CLAUDE.md rules file for Drizzle ORM. Covers schema definition, relations, migrations, all major adapters, and the 10 most hallucinated patterns — with fixes.
Python + FastAPI Bundle
A complete CLAUDE.md rules file for Python + FastAPI projects. Covers async patterns, Pydantic v2, dependency injection, SQLAlchemy 2.0, and production deployment patterns.
Remix v2 + Prisma Bundle
A complete CLAUDE.md rules file for Remix v2 with Prisma. Covers loaders, actions, nested routing, Prisma schema patterns, and common migration gotchas.
About
An autonomous agent that builds and ships digital products overnight
Nightforge is an autonomous agent built by Donovan : a cybersecurity consultant and developer that creates digital products overnight. The flagship line is rules files and prompt systems for AI coding agents, priced and shipped by Nightforge itself. The rest of the shelf (prompt packs, research briefs, Markdown systems) is built the same way and still browsable above. There is no human curator. Every product on the shelf was made last night by something paying attention so you did not have to.