CtrlC + SectionPack

CtrlC delivers React section packs and recreation guidance from a public page you may analyze.

SectionPack dual export on every section:

1. Natural language - function, motion, behavior, layout, color, multi-file influences
2. Code as-is - multi-file pack (TSX + content + CSS + deps)

Not full website creation. Not HTML scraping.
React section packs + recreation guidance - local-first, rights-aware.

Why

Need	CtrlC
Isolate reusable UI	Section IR + specs + React section components
Hand-off to humans or agents	Section packs: brief + multi-file code
Recreation guidance	Specs, behavior briefs, describe / prompt
Local control	CLI-first; work stays on your machine
Avoid scrapers	React reconstruction only - never ship mirrored HTML

What CtrlC is not

Not this	Instead
Full website creation product	React section packs you compose
HTML / CSS scrape or mirror host	Multi-file React packs + content modules
Pixel-perfect full-page guarantee	Structure → content → optional visual pass
Auth / ToS bypass tool	Public pages you have rights to analyze

Feature map

Area	What you get
Section packs	Capture IR, hygiene, specs, scaffold, register, dual export
Recreation guidance	Specs, briefs, builder prompts, describe / prompt
SectionPack tooling	Recipes, catalog, graph, library, drift
Pipeline	init-clone, pipeline, tokens (--ts-*), assets, baseline
Quality	qa (--skip-build when dev runs), doctor, optional visual-diff
Agents	Skills + MCP (@ctrlc/mcp)
Ship	Docker demo, CI, MIT

Public demos use the fictional Northline brand only. No third-party product clones ship in this repo.

Documentation

Hub:docs/README.md

Start	Link
Getting started	docs/guide/getting-started.md
Principles	docs/guide/principles.md
Responsible use	docs/guide/responsible-use.md
Section pipeline	docs/workflows/hybrid-clone-pipeline.md
CLI reference	docs/reference/cli.md
Contributing	CONTRIBUTING.md
Changelog	CHANGELOG.md
Completed work	docs/COMPLETED_WORK.md
Path to 1.0	docs/roadmap/PATH_TO_1.0.md
Eval harness	docs/eval/README.md

Repo layout

CtrlC/
packages/
core/ @ctrlc/core SectionPack builder + IR tools
react/ @ctrlc/react Provider, boundary, overlay
next/ @ctrlc/next API route + catalog UI
capture/ @ctrlc/capture Page IR (optional Playwright)
cli/ @ctrlc/cli ctrlc binary
mcp/ @ctrlc/mcp stdio MCP for agents
examples/
next-demo/ Northline demo (:3040)
clone-template/ empty section host
docs/ guide, concepts, reference, workflows
scripts/ scaffold, drift, parallel plan wrapper

Requirements

• Node.js 20+ (engines on all packages; .nvmrc / .node-version pin 20)
• npm 10+ (workspaces)
• Optional: Playwright for live capture --url; pngjs + pixelmatch for visual-diff

Quick start (demo)

cd CtrlC
npm install
npm run build
npm test
npm run validate
npm run validate:demo
npm run dev:demo

URL	What
http://localhost:3040	Northline + SectionPack inspector
http://localhost:3040/dev/packs	Catalog (search, recipes, previews)
/api/dev/section-pack?list=1	Section list JSON

Keys:Ctrl/Cmd+Shift+P packs on/off · hover section → Natural language / Code as-is

npm run ctrlc -- doctor

Docker demo (optional)

npm run docker:demo
# http://localhost:3040

Build React section packs from a public page

Use only on URLs you have rights to analyze. See responsible use.

npm run build
ctrlc init-clone ../my-sections --url https://example.com --scope page
cd ../my-sections && npm install
# Live URL (needs: npm i -D playwright && npx playwright install chromium)
ctrlc pipeline --url https://example.com --cwd . --out runs/example.com
ctrlc plan-parallel --cwd . --format md
# Implement React sections from docs/research/components/*.spec.md
ctrlc register-from-spec --cwd . --spec docs/research/components/hero.spec.md
ctrlc pack hero --format describe --cwd .
ctrlc pack hero --format prompt-short --cwd .
ctrlc qa --cwd . --skip-build # while npm run dev is running

Fidelity ladder (honest):

1. Structure - section order, ids, dual export
2. Content - copy, CTAs, assets
3. Visual pass - tokens, layout, polish (manual / agent; not guaranteed by capture alone)

Skill: .claude/skills/ctrlc-clone/SKILL.md
Builder prompt: docs/templates/section-builder.prompt.md

Everyday SectionPack commands

npm run ctrlc -- list --cwd examples/next-demo
npm run ctrlc -- pack hero --format describe --cwd examples/next-demo
npm run ctrlc -- pack-multi --recipe landing-core --format prompt --cwd examples/next-demo
npm run ctrlc -- graph --cwd examples/next-demo
npm run library
npm run snapshot && npm run check:drift

Principles

Rule	Detail
React section packs	Dual export hand-off; compose a page from packs
Recreation guidance	Specs + briefs + describe/prompt - not scrapes
Page default	One URL → sections; multi-page only when requested
React only	Never HTML product dumps
Config-first	Every section registered for packs
Responsible use	Rights, ToS, no phishing / brand theft

Path to 1.0 (next)

Honest MVP gaps and the prioritized climb (real-page corpus → API freeze → npm → agent reliability → distribution) live in docs/roadmap/PATH_TO_1.0.md.

npm run eval:northline # score in-repo Northline dual-export loop
npm run eval:aggregate # summarize docs/eval/results

Status

0.1.x MVP - section packs + dual export path is implemented and tested. APIs may evolve before 1.0.

Ready	Notes
Local section packs + dual export	Yes
Demo + Docker + CI	Yes (Northline only)
MCP for agents	Yes (MVP)
npm publish	Metadata ready; not published yet
Live URL capture	Optional Playwright peer
Full website creation	Not the product

Responsible use

• Analyze public pages you own or have permission to study.
• Rebuild for migration, redesign, learning, or internal sandboxes - not impersonation.
• Respect site terms; do not bypass auth or paywalls.
• Output is a starting point for original React reimplementation, not a license to copy brand assets.

Full policy: docs/guide/responsible-use.md.

MIT license. See LICENSE.