> ## Documentation Index
> Fetch the complete documentation index at: https://docs.instructorphp.com/llms.txt
> Use this file to discover all available pages before exploring further.

# V1.18.3

# Release Notes - v1.18.3

## Highlights

* Tool discovery registry with metadata/full-spec layering for progressive tool discovery.
* New `tools` tool for list/help/search of available tools without loading full specs.
* Capability to wire tool registries into agents for dynamic tool catalogs.

## New Features

### Tool Registry

* Added `ToolRegistryInterface` and `ToolRegistry` for registering tool instances or factories.
* Added `ToolPolicy` filtering for allow/deny tool lists.
* Added metadata and full-spec resolution helpers to support progressive discovery.

### Tools Tool

* Added `ToolsTool` for `list`, `help`, and `search` actions (plus CLI-like `command` parsing).
* Supports locale-aware metadata/full spec rendering via registry.

### Agent Capability

* Added `UseToolRegistry` capability for agent blueprints to expose registries as tools.

## Tests

* Added registry and tools discovery tests for metadata/full spec, search, and help flows.