Reference

These pages are the lookup-it-when-you-need-it reference. They restate material from earlier sections in compressed, denormalized form.

Page	What it covers
Subject naming reference	Conventions for op names, event names, and mount paths.
Envelope schemas	Full JSON schemas for the request, response, and error envelopes.
Error codes	The standardized error-code catalog (target).
Reserved subjects	Every facet name reserved by the protocol with its meaning.
Compatibility rules	Additive-only schema evolution; what may change, what may not.

See also

• Subjects — conceptual.
• Subject grammar — formal grammar.
• Request envelope — body shape.
• CLAUDE.md — Rule 9 §"Coding standards" including the additive-only rule.