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dapp-builder SKILL.md skillA

dapp-builder from freenet/freenet-agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add freenet/freenet-agent-skills/dapp-builder@git:20261103.f9fae8f

Pins git:20261103.f9fae8f in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: freenet/freenet-agent-skills
Path: skills/dapp-builder/SKILL.md
Versions recorded: 7
Latest version: git:20261103.f9fae8f, committed Nov 3, 2026
First version recorded: Oct 7, 2026
Size: 11,554 bytes
Repository stars: 27
License: LGPL-3.0

Build and maintain decentralized applications on Freenet using river as a template. Guides through designing contracts (shared state), delegates (private state), and UI, and through upgrading a live dApp safely. Use when user wants to create a new Freenet dApp, design contract state, implement delegates, build a Freenet-connected UI, OR upgrade an existing dApp — bump freenet-stdlib, ship a new contract/delegate version (v2), fix a bug that re-keys the WASM, or migrate state across a…

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Freenet dApp Builder

Build decentralized apps on Freenet. [River](https://github.com/freenet/river) is the
reference app: `contracts/room-contract/`, `delegates/chat-delegate/`, `ui/`, `common/`.

This file holds the model, the rules for every dApp, and the route to the right reference.
Read the reference for your task before writing code.

## The model

An app has three kinds of component, and most real apps have several contracts and delegates.

- **Contract:** WASM defining the shape and merge rules of shared state. It runs on untrusted
  peers and cannot hold secrets; all state is public unless the client encrypted it. The WASM
  is a table schema, and each parametrized instance is a row with its own key and state.
- **Delegate:** WASM on the user's node that holds secrets and does signing and encryption. It
  runs only when poked: an app message, a contract notification, or an event its manifest
  declares.
- **UI:** a web app talking to the local node over WebSocket, published as the *state* of a web
  container contract.

A key is `BLAKE3(BLAKE3(wasm) ‖ params)`. Any WASM change, including a dependency or compiler
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add freenet/freenet-agent-skills/dapp-builder@sha256:bce7bcca32ffbb36

The line at the top of this page pins the label git:20261103.f9fae8f, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_7z5fj27ksdxiowa4.svg)](https://markdownregistry.com/a/art_7z5fj27ksdxiowa4)

1 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 7 versions of this file, between Oct 7, 2026 and Nov 3, 2026, about one every 4 days. Its first recorded version is graded B and its latest A.

version	committed	commit	size	audit
git:20261103.f9fae8f latest	2026-11-03	f9fae8f	11,554 B	A	view · diff
git:20261026.0f595df	2026-10-26	0f595df	63,563 B	B	view · diff
git:20261022.7117c5a	2026-10-22	7117c5a	63,425 B	B	view · diff
git:20261019.82787d2	2026-10-19	82787d2	62,888 B	B	view · diff
git:20261018.b0d64d8	2026-10-18	b0d64d8	62,397 B	B	view · diff
git:20261017.e27b258	2026-10-17	e27b258	61,785 B	B	view · diff
git:20261007.890ad1b	2026-10-07	890ad1b	61,683 B	B	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (11554 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

freenet/freenet-agent-skills · 27 stars · license LGPL-3.0 · pushed 2026-11-03 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_7z5fj27ksdxiowa4
GET https://markdownregistry.com/api/v1/resolve?ref=freenet/freenet-agent-skills/dapp-builder
GET https://markdownregistry.com/api/v1/blob/bce7bcca32ffbb36f9396a7123a2070dd81ba6647517adedd7c0fc8fdc945b83

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.