Substack Publisher

Publish markdown posts to Substack as drafts or newsletter articles. Converts markdown to Substack's ProseMirror JSON format.

Requirements

Set these environment variables (add to .env):

• SUBSTACK_SID - Your substack.sid session cookie value
• SUBSTACK_SUBDOMAIN - Your Substack subdomain (e.g., adrianpetcu)
• SUBSTACK_USER_ID - Your Substack user ID (e.g., 106993810)

Quick Start

python scripts/publish_to_substack.py posts/daily-thoughts/03-context-driven-bug-fixing.md --dry-run

Script Usage