The Composer

BETA · 2026

The Composer is an agentic editorial framework: a 10-persona board reviews drafts, a multi-step pipeline takes notes through interview → draft → review → approve, and the operator stays on direction-setting work. Masthead is the productized expansion that turns this into a multi-tenant editorial OS.

Multi-Agent10 PersonasEditorial PipelineMasthead Expansion

In active development

Project 02 / 04

DRAFT · REVIEW · APPROVE · PUBLISH

An agentic editorial framework — the operator's newsroom, run by ten personas, built around context engineering as the scarce resource.

PROBLEM

Drafting in public is a quality risk.

Newsletters that publish raw operator thinking have a quality ceiling — readers stop forwarding. Persona-based review preserves the voice while raising the floor.

SYSTEM

Notes → Structured → Interview → Draft → Editor → Reader → Approved.

An explicit state machine. Each transition gates on a persona pass/fail. Two consecutive editor failures escalate to the operator. Rejected drafts return to interview, not to notes — preserving the operator's previous thinking work.

BOARD

Strategist, Architect, Editor, Journalist, Peer, Revenue Partner, PM Reader, Founder Reader, Chief of Staff, CDO.

Each persona is an LLM agent with a system prompt anchored to a real editorial archetype. They evaluate the draft from a single, narrow lens — rigor of argument, narrative arc, voice authenticity, conversion mechanism, design judgment.

MASTHEAD

The product layer on top.

Multi-tenant Turborepo build: Clerk auth, Neon Postgres + RLS, direct Anthropic SDK, Vercel AI SDK for streaming UI. Free tier ships council reviews; paid tier opens the pipeline editor + agent customization + analytics.