build

A command for creating a new Lovable app from a written description and optionally publishing it online.

In plain words
What is it for?
Use it to start an app, monitor its initial build, inspect the project links, and choose whether to deploy it.
Why use it?
It organizes the build process across a Lovable workspace and makes the project and preview links available after creation.

Command

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add commands/lovablelabs/mcp/build
Clone the repo
git clone --depth 1 https://github.com/lovablelabs/mcp
Per session 13 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 221 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00013 $0.00221
Opus 5 $0.00006 $0.00111
Sonnet 5 $0.00003 $0.00044
Haiku 4.5 $0.00001 $0.00022

Measured 2d ago against content hash af9566700c86, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

build scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

commands/build.md · 19 lines

What it actually says

Build a new Lovable app described as: $ARGUMENTS

Use the Lovable MCP tools to do this end to end:

  1. Call list_workspaces to find the target workspace. If the user belongs to more than one, ask which to use.
  2. Confirm with the user before spending credits. Then call create_project in that workspace with an initial build prompt derived from the description above.
  3. Follow the agent's progress with send_message / get_message until the initial build completes.
  4. Call get_project and share the editor URL and preview URL with the user.
  5. Ask whether to publish. If yes, call deploy_project and return the live URL.

Notes:

  • create_project and send_message consume Lovable build credits — always confirm first.
  • deploy_project publishes a publicly reachable URL on Free/Pro plans.
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 19 lines · 13 tokens per session scan A af9566700c86

Subscribe to this mod's changes

build is a command published in the GitHub repository lovablelabs/mcp (3 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 13 tokens to every session and 221 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.