PromptVault

A local-first prompt library for LLM workflows. Store, organize, search, and reuse prompt templates with {{variable}} placeholders — fill in the variables, see the rendered result live, and copy the final text when you're done. No accounts, no cloud, no external LLM calls: everything runs locally.

Features

• Prompt templates — create, edit, and delete prompts with {{variable}} placeholders (strict rendering: only declared variables are accepted, unknown ones are left untouched).
• Live preview — type into the generated variable inputs and watch the rendered output update as you type.
• Use a prompt — server-side render with validation; if a variable is missing you get a 422 plus the exact list of missing variables.
• Tags — free-form, normalized (lowercased) tags with suggestions and tag-based filtering.
• Favorites, duplicates, clipboard — star prompts, clone one (stats reset), copy the template text.
• Catalog controls — full-text search, tag/favorites filters, sorting (name, created, last used), 10-per-page pagination.

Tech stack

Layer	Technology
Backend	Laravel 13 (PHP 8.3+)
Database	SQLite (zero-config, local file)
Frontend	Vue 3 + Inertia 3 (@inertiajs/vue3)
Styling	Tailwind CSS 4
Build	Vite 8
Tests	PHPUnit 12 (PHP, Xdebug coverage) · Vitest 5 (JS, v8 coverage)

Getting started

Requirements: PHP 8.3+, Composer, Node 20+ (any recent LTS).

# Install PHP + JS dependencies, create .env, generate key, migrate, build
composer setup

…or manually:

composer install
npm install
cp .env.example .env
php artisan key:generate
php artisan migrate --force

Then run the app (two terminals):

php artisan serve     # → http://localhost:8000 (redirects to /prompts)
npm run dev           # Vite dev server with HMR

Testing

The application code (app/ + resources/js/) is tested to ≥ 95% code coverage (vendor excluded).

PHP (unit + feature tests of app/):

vendor/bin/phpunit                          # run the suite
XDEBUG_MODE=coverage ./vendor/bin/phpunit --coverage-text   # with coverage

Current state: 60 tests, 522 assertions, all green — 99.05% line coverage.

JavaScript (Vitest + Vue Test Utils under tests/js/, Inertia mocked via a shared stub):

npm run test:js            # run the suite
npm run test:js:coverage   # with coverage (v8 provider)

Current state: 64 tests across 10 files, all green — 100% line coverage (99.57% statements, 96.31% branches, 98.82% functions).

Disclosed exclusions (see SPECS.md): resources/js/app.js is Vite/Inertia entry wiring; two defensive preg_*-failure guards in PromptRenderer are unreachable with the app's static pattern and deliberately uncovered.

Project layout

app/
  Actions/Prompts/          # CQRS-lite actions: ListPrompts, StorePrompt, UpdatePrompt
  Exceptions/               # PromptRenderException
  Http/Controllers/         # PromptController (thin — delegates to services)
  Http/Requests/            # StorePromptRequest, UpdatePromptRequest, PromptFormRequest
  Models/                   # Prompt, Tag
  Services/                 # PromptService (writes), PromptCatalog (reads), PromptRenderer (pure)
resources/js/
  Components/               # PromptForm, RenderPreview, ConfirmDialog, TagPill
  Layouts/AppLayout.vue
  Pages/Prompts/            # Index, Show, Create, Edit
  lib/format.js
routes/web.php              # /prompts resource + duplicate, toggle-favorite, use
tests/
  Feature/, Unit/           # PHPUnit (app/)
  js/                       # Vitest (resources/js/) + shared Inertia stub (stubs/inertia.js)
SPECS.md                    # application specification — source of truth

License

MIT