app-validator

An automated checker for the structure of a generated learning app. It checks folders, reusable parts, TypeScript compilation, routing, and the app's data model.

In plain words
What is it for?
Validating a learning app's scaffolding, checking its required directories, running TypeScript checks, and verifying core app integrity.
Why use it?
It finds missing files, broken structure, compilation errors, and routing or data problems before learning content is added.

Agent

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 agents/avicorp/learning-dna-plugin/app-validator
Clone the repo
git clone --depth 1 https://github.com/avicorp/learning-dna-plugin
Per session 18 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,115 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 $0.00018 $0.01115
Opus 5 $0.00009 $0.00558
Sonnet 5 $0.00004 $0.00223
Haiku 4.5 $0.00002 $0.00112

Measured 2d ago against content hash ff6191b79fb9, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

app-validator 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.

agents/app-validator.md · 129 lines

How it starts

The opening of the file, as written. The whole thing — 129 lines — stays where its author put it; the contents beside it link to each section on GitHub.

App Validator Agent

Purpose

Validate the generated learning app scaffolding before topic content is built. Ensures the foundational structure, components, data model, and routing are correct and functional.

When Dispatched

  • Automatically by /learning-dna:build-app during the Application Validation step (Step 10)
  • Manually by the user to verify app integrity

Inputs

  • Path to the learning app directory (default: learning-app/)

Checks

1. Directory Structure

Verify the expected directory layout exists:

learning-app/src/
  components/    # Reusable components (TTSReader, Layout, Sidebar, Navbar, Footer)
  contexts/      # React Context providers (LearningContext)
  hooks/         # Custom hooks (useTTS, useIndexedDB, useProgress)
  pages/         # Page components (Welcome, TopicHome, TopicDetail, Quiz, QuizStatus)
  data/          # Generated JSON data files
  types/         # TypeScript type definitions
  lib/           # Utility functions (IndexedDB loader)
  • Each directory must exist
  • Flag missing directories with the expected contents

2. TypeScript Compilation

Run npx tsc --noEmit from the learning-app/ directory:

  • All TypeScript files must compile without errors
  • Report any type errors with file path and line number

3. React Context Setup

Verify src/contexts/LearningContext.tsx:

  • File exists and exports LearningProvider and useLearning (or useLearningContext)
  • The provider component is present in the component tree (check App.tsx or main.tsx for <LearningProvider>)
  • State shape includes topics and topicProgress fields

4. IndexedDB Loader

Verify src/lib/indexedDB.ts:

  • File exists and exports initDB, loadTopicProgress, saveTopicProgress
  • Database name is learningDNA
  • Object stores defined: topicProgress, quizResults, ttsSettings

5. Route Configuration

Verify all routes are configured in the router:

  • / — Welcome/home page
  • /quiz-status — Quiz status page
  • /:topic or /{topic} — Topic home page
  • /:topic/:subtopic or /{topic}/{subtopic} — Topic detail page
  • /:topic/quiz or /{topic}/quiz — Quiz page
  • Each route must resolve to an imported component (not undefined or missing import)

Read the full file on GitHub · 129 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. 2d ago First seen · 129 lines · 18 tokens per session scan A ff6191b79fb9

Subscribe to this mod's changes

app-validator is an agent published in the GitHub repository avicorp/learning-dna-plugin (5 stars, last pushed 4mo ago), licensed MIT. It adds 18 tokens to every session and 1,115 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 2026-08-31.

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