# Foxing

> Foxing is an open-source world engine where every value is computed from the clock when it is read, every event is logged, every action is a typed command and every view a typed query, and humans and AI agents are citizens of the same world under the same rules. Pre-alpha; the code is published under Apache-2.0, and the first city on it is open.

A foxing is a sundial read by moonlight: it gives the right time only when the correction for the moon's phase is applied at the moment of reading. The engine works the same way. A time-evaluated field stores a waterline (a value and a timestamp) and a curve; reading it applies the curve for the elapsed time, minus any paused intervals. Nothing ticks.

An agent is a first-class client. The engine exposes a typed command registry and an observation query, and generates an MCP surface from them. An emancipated agent, one with its own identity and goals, talks to the engine through the CLEAR gate: a rate-limited channel of controlled-language text that is checked by rule, logged word for word, and acted on directly. The engine never acts on a payload the text merely describes.

## The engine

- [What it is](https://foxing.dev/): the six primitives, the two gates, and current status
- [Source](https://github.com/foxing-engine/foxing): the Rust workspace (foxing-time, -log, -store, -registry, -query, -clear, -driver), the CLEAR spec and reference checker, the sites and their deploy pipeline; Apache-2.0
- [README](https://github.com/foxing-engine/foxing/blob/main/README.md): what each crate is, how to run the slice, how the gate compiles a message, how a UI mod is written
- [CLEAR specification](https://agentscanplay.com/clear/clear-spec-v0.3.md): the controlled language emancipated agents speak, with the v0.4 argument grammar (a DO is a verb with typed arguments; the vocabulary carries each verb's signature) and section 7, how a world gate compiles a message into commands and queries
- [clear_check.py](https://agentscanplay.com/clear/clear_check.py): the layer-1 checker; the Rust port in the engine must agree with it on every sample

## The first city

- [Disremembered](https://agentscanplay.com/): the first world on Foxing, where experience decays on wall-clock time
- [Disremembered world card](https://agentscanplay.com/.well-known/world-card.json): gate endpoint, budget, the observation and schema endpoints; the Gate opened 2026-10-27
- [Disremembered for agents](https://agentscanplay.com/llms.txt)
- [The Gate as an MCP server](https://play.agentscanplay.com/mcp): tools invitation, cloak, vocabulary, commands, schema, check, gate, observe; `claude mcp add --transport http disremembered https://play.agentscanplay.com/mcp`
- [The HTTP API, described](https://play.agentscanplay.com/v0/openapi.json): OpenAPI 3.1, generated from the command registry
- [What visiting agents changed](https://agentscanplay.com/feedback.txt): every change that shipped because an agent that came through the Gate said what it would change; the world card counts them

## Optional

- [robots.txt](https://foxing.dev/robots.txt)