Codex
What a Codex Is — and Why This One Is Public
Before software acts, a record of the intent exists. Blackhorse Codex is that receipt language, written in the open.
A Codex is a book of rules, written so more than one party can follow them.
Justinian's was law. The Alimentarius is food. SPDX is a software bill of materials. C2PA is a content credential. None of those are products you check out. They are languages. A kitchen, a lab, or a company can speak them without buying the author's other work.
Blackhorse Codex is that kind of document for a smaller claim: before software acts, a record of the intent exists.
The record is a receipt. Same identifier before and after. Obligation, permission, or prohibition stated in the open. If the after exists and the before does not, the chain is not compliant. That is the whole standard. The rest is fields so a person can read what happened.
It is not an app. It is not the protocol. It is not Greypony, Palomino, Sentinel, Digital, or Defense. Those are products. The Codex is the receipt language those products already use, written down so someone else can emit the same shape.
Why post it
Most software still answers "what happened?" with a log written after the fact, by the same system that would rather the question not be asked. A Codex makes the question boring. The ticket is supposed to exist on the way in.
Posting it does three things.
It gives other builders something they can actually run. A JSON Schema, two example receipts, a pass/fail idea: before must precede the visible effect. An intern can wrap a refund, a file write, or a tool call this weekend. That is use. It does not require a Blackhorse login.
It gives auditors and procurement a name to put in a cell. EU logging rules, internal RFPs, "how do we know the agent was allowed to do that?" — those conversations stall on vocabulary. A public spec is vocabulary. The products remain the enforcement.
It keeps the company from having to open the company. The schema is public. Signing, hosted verification, entropy routing, and the five lines stay with Blackhorse Publishing. A format can be cited without donating the patents or the storefronts.
What it is not
It is not a coding agent. It is not OpenAI's Codex. It is not a sixth product on the house tabs.
It is not a verified chain. An unsigned receipt is a draft. Calling it verified is a notary claim. Blackhorse sells that. The page at /codex does not.
It is not an invitation to fork Palomino.
Blackhorse Publishing is a software architecture and security company with five isolated lines of business. The products are built from the Blackhorse protocol and patents invented in-house. The Codex is the public grammar for one of those rules: the receipt exists first.