Projects under organizations with fixed URL name and feature ID
prefix, three visibility levels, open contribution, per-project
roles, settings and typed-confirmation delete. Hidden projects 404.
Leaving an org drops its project roles. Project access rules live in
intent/access.py alongside org access.
Features numbered per project (INT-12) in a tree. Every change is a
revision with a required note; history, old revisions, and
side-by-side field and line diffs between any two. Cycles and
superseded-without-replacement are rejected. Markdown renders safely
with source-line attributes for Phase 3 line comments and headings
shifted below the page h1. Server-side preview works without JS.
Structural accessibility check runs on every page in tests.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
