---
type: reference
title: PX3 SDK
description: Everything needed to run PX3 governance on your own corpus — schema spec, document templates, a conformance validator, and a tier-aware MCP server.
tags: [px3, sdk]
px3_tier: operational
status: draft
---

The PX3 SDK is the standard, packaged: everything an organization needs to run
PX3 governance on **its own** body of knowledge.

- **Schema specification** — the three tiers, the document types, the identifier
  grammar, supersession and conflict rules. *(Held until its gates clear.)*
- **Document templates** — the eight working shapes, ready to copy.
- **Conformance validator** — a CLI that answers one question: is this corpus
  PX3-conformant?
- **px3-mcp** — an MCP server that exposes a governed corpus to AI agents with
  tier-aware scoping: the working layer is agent-actionable, the consistency layer
  is read-only, the structural tier is not exposed at all.

The boundary is simple: a component ships if it helps you run PX3 on *your*
corpus. The machine that runs it at the source stays private.

**The standard is open; the machine is ours.**

The repository link lands here when v1 opens — its release gates are named in
the working record, and they have not cleared.