# Invar Project Development

This is the Invar project itself. Follow INVAR.md (the source, not a copy) and CLAUDE.md.

## Entry Verification

Before writing any code, execute:

```
invar_guard (changed=true)   # or: invar guard --changed
invar_map (top=10)           # or: invar map --top 10
```

Use MCP tools if available, otherwise use CLI commands.

## Quick Reference

- Core (`src/invar/core/`): @pre/@post contracts, doctests, pure (no I/O)
- Shell (`src/invar/shell/`): Result[T, E] return type
- Workflow: Understand -> Specify -> Build -> Validate (USBV)
- Task complete only when final invar_guard passes.

## Project-Specific

- INVAR.md here is the **source**, templates are in `src/invar/templates/`
- Do NOT run `invar update` on this project
