# i2

> The middleware toolbox


## Pages

- [i2](index.html.md): Core tools for minting code.
- [API reference](api.html.md): | `i2`   | Meta-programming tools to build declarative frameworks   |
- [i2](_autosummary/i2.html.md): Meta-programming tools to build declarative frameworks
- [i2.base](_autosummary/i2.base.html.md): Tools to provide meta-interfaces (“mints”) of python objects.
- [i2.castgraph](_autosummary/i2.castgraph.html.md): A lightweight transformation service for Python that solves the “stable role,
- [i2.chain_map](_autosummary/i2.chain_map.html.md): Merge mappings
- [i2.deco](_autosummary/i2.deco.html.md): Decorator tools
- [i2.doc_mint](_autosummary/i2.doc_mint.html.md): Meta-interfaces
- [i2.errors](_autosummary/i2.errors.html.md): Error objects
- [i2.footprints](_autosummary/i2.footprints.html.md): Analyzing what attributes of an input object a function actually uses
- [i2.io_trans](_autosummary/i2.io_trans.html.md): Tools to make input and output transforming decorators.
- [i2.itypes](_autosummary/i2.itypes.html.md): | `dot_string_of_callable_typ`(typ)                   | A `inputs -> Callable -> output` string, wit...
- [i2.key_path](_autosummary/i2.key_path.html.md): Flattening maps and manipulating key paths
- [i2.multi_object](_autosummary/i2.multi_object.html.md): A few fundamental tools to operate on a fixed collection of objects (e.g. functions).
- [i2.routing_forest](_autosummary/i2.routing_forest.html.md): Tools to specify functions through trees and forests.
- [i2.signatures](_autosummary/i2.signatures.html.md): Signature calculus: Tools to make it easier to work with function’s signatures.
- [i2.util](_autosummary/i2.util.html.md): Misc util objects
- [i2.wrapper](_autosummary/i2.wrapper.html.md): A wrapper object and tools to work with it
- [For AI agents](ai-agents.html.md): `i2` ships artifacts for coding agents alongside its code. This page lists
- [About this build](about-this-build.html.md): This documentation was built on **2026-09-22 15:20 UTC** from commit <a href="https://github.com/i2m...

## Optional

- [i2.md](i2.md): Complete documentation in a single file.

## Build

- [build_info.json](build_info.json): build provenance (commit, version, tool versions, whether the docs match the package)