🎙️ Podcast Distribution AI

An all-in-one AI platform that takes you from a topic idea to a finished, publishable podcast episode in minutes — it writes the script (GPT-4), records realistic multi-voice audio (ElevenLabs), and designs the cover art (DALL·E), then lets you fine-tune, download, and repurpose the result.

Stack

Concern	Choice
Framework	Next.js (App Router) + TypeScript
UI	Tailwind CSS + shadcn/ui + Recharts
Database	PostgreSQL + Prisma
Auth	Better Auth (email/password + Google, admin + organization plugins)
Queue	pg-boss (Postgres-backed, no Redis) + a separate worker process
Storage	Local disk on a persistent volume (swappable `StorageProvider` → S3/R2)
AI	OpenAI (GPT-4 + DALL·E), ElevenLabs (TTS + dialogue)
Billing	Stripe and PayPal → one unified `Subscription` model
Email	Resend
Deploy	Dokploy (Docker Compose + Traefik) — see `deploy/README.md`

Architecture

Browser ──► Next.js web (PM2)  ──enqueue──►  Postgres (app data + pgboss queue)
                │  SSE status                      ▲ claim job (SKIP LOCKED)
                ▼                                   │
          /api/assets (private mp3)          Worker (PM2, ffmpeg)
                                              script → segment → ElevenLabs
                                              → ffmpeg stitch → DALL·E → save → meter
                                                       │
                                                       ▼
                                              Local disk  storage/{mp3,art}

Local development

npm install
cp .env.example .env        # fill DATABASE_URL, BETTER_AUTH_SECRET, OPENAI_API_KEY, ELEVENLABS_API_KEY…
npx prisma migrate dev      # create tables
npm run db:seed             # seed the plan catalog

# Two processes:
npm run dev                 # web (http://localhost:3000)
npm run worker:dev          # generation worker (needs ffmpeg on PATH)

ffmpeg must be installed and on PATH for audio stitching (brew install ffmpeg / apt install ffmpeg / choco install ffmpeg).

Make yourself an admin after signing up:

npm run make-admin you@email.com   # then visit /admin

Key directories

app/(marketing)   public landing + pricing
app/(auth)        sign-in / sign-up / password reset
app/(app)         user dashboard (episodes, wizard, usage, billing, team, api-keys, settings)
app/(admin)       admin dashboard (users, subscriptions, AI cost, moderation, health, flags, audit)
app/api           auth, webhooks/{stripe,paypal}, episodes/[id]/stream (SSE), assets, v1 (API)
lib/ai            provider abstraction + pipeline (generate-episode, segment, stitch, repurpose)
lib/billing       plans, stripe, paypal, catalog, unified subscription writer, webhooks
lib/queue         pg-boss client + job definitions
lib/storage       StorageProvider interface + local-disk impl
worker/           pg-boss consumer (runs the generation pipeline)

How generation works

The 3-step wizard creates an Episode (QUEUED) + speaker config, then enqueues a pg-boss job (after enforceLimit checks the plan).
The worker runs the pipeline, updating Episode.status at each stage.
The episode page subscribes to /api/episodes/[id]/stream (SSE) and shows a live stepper, then renders the script editor, audio player, and cover art when READY.

Long scripts are chunked to stay under ElevenLabs' ~2k-char dialogue limit, synthesized per segment, then concatenated and loudness-normalized with ffmpeg.

Deployment

Containerized for Dokploy (Docker Compose: web + worker, Traefik for domain/TLS/SSE, a persistent storage volume). See deploy/README.md for the full runbook (env, domain, migrations-on-boot, webhooks, backups).

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