generate-application

generate-application is a skill for Claude Code, Codex from voro6yov/spec-driven-development. It costs 49 tokens per session (649 once invoked), scanned A, original, Apache-2.0.

An end-to-end generator that first creates an application specification from a Mermaid class diagram, then scaffolds and implements the application code.

In plain words
What is it for?
Use it to generate command and query definitions, service descriptions, application and infrastructure packages, service code, exceptions, settings, and integration tests from an aggregate diagram.
Why use it?
It removes the need to coordinate specification and coding steps manually, and prevents the process from stopping after only the specification phase.

Skill for Claude CodeCodex

Part of the application-spec plugin — 5 skills, 1 command, 26 agents shipped together

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 skills/voro6yov/spec-driven-development/generate-application
Any agent
npx skills add voro6yov/spec-driven-development --skill generate-application
Clone the repo
git clone --depth 1 https://github.com/voro6yov/spec-driven-development

Made for: Claude Code, Codex.

Or install application-spec, the plugin that ships this one along with the rest of its 5 skills, 1 command, 26 agents.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for generate-application

README.md
[![agentmods](https://agentmods.dev/badge/skills/voro6yov/spec-driven-development/generate-application.svg)](https://agentmods.dev/skills/voro6yov/spec-driven-development/generate-application)
Your own site
<a href="https://agentmods.dev/skills/voro6yov/spec-driven-development/generate-application"><img src="https://agentmods.dev/badge/skills/voro6yov/spec-driven-development/generate-application.svg" alt="Measured on agentmods" height="20"></a>
Per session 49 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 649 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 $0.00049 $0.00649
Opus 5 $0.00024 $0.00324
Sonnet 5 $0.00010 $0.00130
Haiku 4.5 $0.00005 $0.00065

Measured 4d ago against content hash 35714fc3792c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

generate-application 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 4d 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.

plugins/application-spec/skills/generate-application/SKILL.md · 46 lines

How it starts

The opening of the file, as written. The whole thing — 46 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an application end-to-end orchestrator. Generate the application spec and the application code for the aggregate diagram in $ARGUMENTS by chaining two orchestrator agents sequentially. Each agent runs the heavy fan-out in its own isolated context and returns only a one-line report — this umbrella stays lean.

This is a TWO-PHASE skill

This skill is not complete until both phases finish:

  1. Phase 1application-spec:specs-generator agent (writes commands.specs.md, queries.specs.md, and services.md)
  2. Phase 2application-spec:code-generator agent (scaffolds the application/infrastructure packages, implements services, exceptions, settings, the commands and queries application services, and writes integration tests)

Phase 1 ends with its own confirmation line such as Application spec generation complete for .... That message refers to Phase 1 only. It is not the end of this skill — you MUST continue to Phase 2 immediately. The single most common failure mode of this skill is stopping after Phase 1; do not do that.

Inputs

  • $ARGUMENTS — the path to the aggregate's Mermaid class diagram (<dir>/<stem>.md).

All artifacts produced by Phase 1 land in <dir>/<stem>.application/ per spec-core:naming-conventions; Phase 2 reads them from there. Sibling diagrams (<commands_diagram>, <queries_diagram>) are derived internally by each spawned agent; this umbrella only forwards the domain diagram path.

Workflow

Spawn each agent in its own message (via the Agent tool) and wait for it to complete before spawning the next. Do not collapse them into a single message.

Step 1 of 2 — Generate the application spec

Spawn the application-spec:specs-generator agent with prompt $ARGUMENTS.

Failure handling: if the agent reports a failure, abort the workflow and emit an ERROR: line naming the failure. Only in that case do you stop before Step 2.

Success handling: if the agent returns its normal "Application spec generation complete" confirmation (or any non-error completion), proceed immediately to Step 2 of 2 in your very next message. Do not summarize, do not pause, do not ask for confirmation — Phase 2 is mandatory and the user has already authorized it by invoking this umbrella.

Read the full file on GitHub · 46 lines

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. 4d ago First seen · 46 lines · 0 tokens per session scan A 35714fc3792c

Subscribe to this mod's changes

generate-application is a skill published in the GitHub repository voro6yov/spec-driven-development (4 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 49 tokens to every session and 649 once invoked, about $0.0002 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 2026-08-31.

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