---
title: Reference
summary: Current-contract snapshots of Holon's CLI, configuration, and control-plane surfaces.
order: 40
---

# Reference

Reference pages describe Holon's current public surface as it actually behaves —
not as it is planned or promised. They are verified against the compiled
runtime (`holon --help`, `holon config schema`) and should be refreshed when
behavior changes.

> **Stability note:** The runtime is pre-1.0. CLI shapes, config keys, and HTTP
> endpoints may change without prior notice. Each reference page records the
> version it was last regenerated against where applicable. See the repository
> [RFC index](https://github.com/holon-run/holon/tree/main/docs/rfcs) for design direction and stability status.

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- [CLI reference](./cli.md)
  Holon's current command-line interface — verified against holon --help (v0.14.1).
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- [CLI contract inventory](./cli-contract-inventory.md)
  First-pass stability inventory for Holon's command-line parameters, outputs, and follow-up contract work.
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- [CLI stability policy](./cli-stability-policy.md)
  Support policy for Holon's command-line surfaces and machine-readable output contracts.
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- [CLI exit codes](./cli-exit-codes.md)
  Exit-code and stream-routing contract for Holon's command-line interface.
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- [Configuration](./configuration.md)
  Holon configuration files, keys, credentials, environment variables, and diagnostics.
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- [HTTP control plane](./http-control-plane.md)
  How to think about Holon's headless integration surface.
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- [API contract inventory](./api-contract-inventory.md)
  Post-baseline stability inventory for Holon's HTTP control-plane API parameters, responses, and Phase 2 contract work.
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- [Model tool schema inventory](./model-tool-schema-inventory.md)
  Versioned inventory for Holon's model-facing built-in tool schemas, result envelopes, and stability labels.
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- [Supported Models](./models.md)
  Complete reference of all built-in models and providers supported by Holon.
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