Nuvyn

Install

dotnet tool install -g NuvyntraLabs.Nuvyn.Cli --source https://api.nuget.org/v3/index.json
nuvyn init ClinicApp --agent cursor

Nuvyn is a standalone PackAsTool CLI. It depends only on System.CommandLine and Spectre.Console. nuvyn init copies an embedded three-project host, adds the default Nuvyntra packages from nuget.org, writes .nuvyn/ standing law, and installs slash commands for the Spec Kit coding-agent set — Cursor, GitHub Copilot, Claude Code, Gemini CLI, Codex, Windsurf, and 30+ more. nuvyn adopt attaches that slash chain to an existing MAUI app and writes .nuvyn/, skills, and adopt-report.md only — it does not change host architecture, UI kit, or HTTP. init never overlays an existing folder. init / adopt / check compose maui-dev doctor --path when MauiDev is on PATH. On an interactive terminal it asks every 4 hours whether to update from nuget.org.

Adopt an existing app

Attach the slash chain without rewriting MVVM, UI kit, or HTTP. Refuses a non-MAUI folder or a tree that already has .nuvyn/. Then run the same slash chain; read adopt-report.md before /nuvyn.plan.

cd FieldApp
nuvyn adopt
nuvyn adopt --agent cursor
nuvyn adopt --path ../FieldApp --agent copilot

Step-by-step: Adopt an existing app.

Refresh skills

After you update the global CLI, refresh templates and slash files in an existing Nuvyn app (from init or adopt). Host code, specs/, .nuvyn/constitution.md, and .nuvyn/adopt-report.md stay as they are. PackageReference versions are not changed.

cd ClinicApp
nuvyn update
nuvyn update --agent cursor

Step-by-step: Refresh skills.

Default host

Five product packages on the MAUI app, plus MVVMExpress satellites on Core and Tests. Versions are the latest nuget.org stable — not pinned. Do not add anything else until the spec asks.

• Plugin.Maui.MVVMExpressApp shell, ViewModels, navigationDocs →
• NuvyntraLabs.UIKitLumina NV* controls and page recipesDocs →
• Plugin.Maui.HttpForgeTyped REST clientDocs →
• Plugin.Maui.FormValidationForm rules on the hostDocs →
• Plugin.Maui.KeyboardManagerSoft keyboard hide / show / resizeDocs →

Slash chain

Open the project in the agent you selected at init or adopt. Run these in order. Domain comes from your spec.

Coding agents

Omit --agent for a searchable Spec Kit picker. Pass a key to skip the prompt. Slash commands land in the folder that agent already reads.

Also: agy, alquimia, amp, auggie, bob, cline, codebuddy, command-code, cursor-agent, devin, docker-agent, droid, dsh, firebender, forge, grok, hermes, iflow, junie, kilocode, kimi, kiro-cli (kiro), lingma, muse, omp, opencode, pi, qodercli, qwen, roo, rovodev, shai, tabnine, trae, vibe, zcode, zed.

Read next

• Technical docs

  What SDD is, and why agents need it

  Spec-driven development, agentic coding, and how the CLI is built.

• User guide

  Install, init, adopt, and grow the app

  Requirements, host tree, adopt an existing app, slash workflow, catalog rules, and troubleshooting.