What is ToolRegistry AGENTS.md?

A guide for ToolRegistry, a library that registers and runs tools for AI models across providers such as OpenAI, Anthropic, and Gemini. It also connects tools from standards including MCP, OpenAPI, and LangChain.

Use it when modifying tool registration, schemas, enabling or disabling tools, provider integrations, or the shared library used by ToolRegistry’s server and hub packages.

It explains the library’s role in a larger package ecosystem and how its mixins divide responsibilities, making changes easier to place safely.

How Oaklight/ToolRegistry configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to Oaklight/ToolRegistry. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/Oaklight/ToolRegistry/master/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/Oaklight/ToolRegistry

Made for: Codex, OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/oaklight/toolregistry/agents-md/github.svg)](https://agentmods.dev/instructions/oaklight/toolregistry/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/oaklight/toolregistry/agents-md"><img src="https://agentmods.dev/badge/instructions/oaklight/toolregistry/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/oaklight/toolregistry/agents-md"><img src="https://agentmods.dev/badge/instructions/oaklight/toolregistry/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 2,147 This file is loaded in full into every session.

When invoked 2,147 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.02147	$0.02147
Opus 5.5	$0.00859	$0.00859
Sonnet 5.5	$0.00429	$0.00429
Haiku 4.5	$0.00215	$0.00215

Measured 2mo ago against content hash 5be746c6bbce, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ToolRegistry AGENTS.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

AGENTS.md · 197 lines

How it starts

The opening of the file, as written. The whole thing — 197 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md — ToolRegistry

Context file for AI coding assistants. Symlinked as CLAUDE.md.

What this project is

ToolRegistry is a protocol-agnostic tool management library for function-calling LLMs. It unifies tool registration, schema generation, and execution across multiple LLM providers (OpenAI, Anthropic, Gemini) and external ecosystems (MCP, OpenAPI, LangChain).

This is the core package in a three-package ecosystem:

Package	Role	Depends on
`toolregistry` (this)	Core library: `Tool` model, `ToolRegistry`, client integrations	—
`toolregistry-server`	Server infrastructure: `RouteTable`, OpenAPI/MCP adapters, auth, CLI	`toolregistry`
`toolregistry-hub`	Tool implementations + default server configuration	`toolregistry-server`

Downstream packages are notified on release via notify-downstream.yml.

Architecture

ToolRegistry is organized around a central ToolRegistry class composed of 7 orthogonal mixins:

Mixin	File	Responsibility
RegistrationMixin	`_mixins/registration.py`	Register/unregister tools from functions, classes, MCP, OpenAPI
EnableDisableMixin	`_mixins/enable_disable.py`	Enable/disable tools, track reasons, metadata updates
NamespaceMixin	`_mixins/namespace.py`	Namespace prefixing, merge, spinoff sub-registries
PermissionsMixin	`_mixins/permissions.py`	Tag-based permission policies, sync/async handlers
ExecutionLoggingMixin	`_mixins/logging.py`	In-memory call history (name, args, result, duration)
AdminMixin	`_mixins/admin.py`	Web admin panel lifecycle
ChangeCallbackMixin	`_mixins/callbacks.py`	Event subscriptions (register, enable, error, etc.)

Key standalone modules:

Module	Purpose
`tool.py`	`Tool`, `ToolMetadata`, `ToolTag`, `TOOLCALL_REASON_PROPERTY`
`tool_discovery.py`	BM25-based fuzzy tool search (`ToolDiscoveryTool`)
`parameter_models.py`	JSON Schema generation from Python signatures
`_rosetta.py`	Multi-provider schema bridge (via `llm-rosetta`)
`truncation.py`	Result truncation with temp file persistence
`admin/`	HTTP server, REST handlers, execution log, auth, static assets
`executor/`	Thread/process pool execution backends
`permissions/`	Policy engine, handler protocol, built-in rules
`config/`	Declarative JSONC/YAML config loader
`integrations/`	Native, MCP, OpenAPI, LangChain integration packages

Read the full file on GitHub · 197 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 197 lines · 2,147 tokens per session scan A 5be746c6bbce

Subscribe to this mod's changes

ToolRegistry AGENTS.md is an instructions file published in the GitHub repository Oaklight/ToolRegistry (67 stars, last pushed 4d ago), licensed MIT. It adds 2,147 tokens to every session, about $0.0086 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Backend and APIs Building agents LLM Tool Calling agentic-ai function-calling mcp tool-use

ToolRegistry AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
ToolRegistry AGENTS.mdOaklight/ToolRegistry	Instructions file	67	4d ago	MIT	A	2,147	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

ToolRegistry: Instructions file for Codex