Add AGENTS.md file

Author: johnthagen

AGENTS.md

@@ -0,0 +1,7 @@
+# Repository Guidelines
+
+## General Instructions
+
+- ALWAYS format the code via `uv run nox --session fmt` AFTER you're done with your task
+- ALWAYS check for lint errors via `uv run nox --session lint` and fix them
+- ALWAYS check for type errors via `uv run nox --session type_check` and fix them

README.md

@@ -417,6 +417,11 @@ To run the image in a container:
 docker run --rm --interactive --tty fact 5
 ```
 
+# AI Agents
+
+AI agentic coding tools are configured in [AGENTS.md](./AGENTS.md). For more details, see
+<https://agents.md/>.
+
 # Miscellaneous
 
 ## Shebang Line