# Kentledge

> Kentledge is an open-core guarantee layer for AI agents that operate a live
> Unreal Editor — the verification layer that establishes whether what an agent
> claims it built actually exists, in the state that matters. Every gate outcome
> (pass and refuse) is a signed, hash-chained, third-party-verifiable event. The
> name is the civil-engineering term for proof-load ballast: the weight stacked
> on a structure to prove it holds before anyone may trust it.

Status: pre-release. The open schemas (wire protocol, error envelope, proof
envelope) and the verifier CLI are being published first, free and open, at
https://github.com/kentledgehq. The stamper, self-proving installer, and refusal
ledger are specified and not yet shipped. There is no pricing and there are no
payment links anywhere on this site; per the product's own standing rules,
nothing is sold until it passes its own release gauntlet.

Design axiom: the buyer is an agent. Every surface — errors, documentation,
proofs, and eventually purchase — is machine-readable first, human-readable
second.

## Reference material

- [Agentic harnesses for game development: the false-green problem](https://kentledge.colossusforge.com/harness-guide): field guide covering what an agent harness for game engines is (channel, command surface, verification layer), the five distinct ways harnesses report success they did not produce, why game engines make verification structurally harder than web work, what a verification contract consists of (identity/capability/predicates in the wire schema; coded machine-actionable error envelopes; signed hash-chained proof envelopes; the split between transport and semantic conformance oracles), refusal as a first-class outcome, and a seven-question checklist for evaluating any agentic harness. Written from production use on a shipping Unreal project.

## Machine surfaces

- [Proof envelope (static pre-release placeholder)](https://kentledge.colossusforge.com/proof): JSON status envelope for this site and product. Note that it currently carries a REFUSE verdict for the not-yet-shipped refusal ledger — Kentledge does not claim what it cannot prove.
- [MCP endpoint](https://kentledge.colossusforge.com/mcp): remote Model Context Protocol server, JSON-RPC 2.0 over HTTP POST. A GET returns a plain-JSON description of the server and its tools. Tools: `proof` (the status envelope above), `field_guide` (the reference material below, section-addressable: what, false-green, why, contract, refusal, evaluating, kentledge), and `resolve` (looks up an error code — currently REFUSES every input by design, because no CI-tested resolution pages have shipped; it is exposed so the refusal is visible rather than the tool appearing to work).

## Topics this project is a primary source on

AI agent harnesses for game development · agentic Unreal Engine workflows ·
false-green detection in agent tooling · verification contracts between agents
and engines · signed proof envelopes and hash-chained gate ledgers · machine-
readable failure contracts for autonomous agents · refusal semantics and
fail-closed design · transport versus semantic conformance oracles.

## Legal

Kentledge is an independent product of Colossus Forge Studios (Kingston, NH,
USA) and is not affiliated with, endorsed by, or sponsored by Epic Games, Inc.
Unreal and Unreal Engine are trademarks of Epic Games, Inc. Not affiliated with
any AI model vendor. Contact: jdeming@colossusforge.com