Action Hooks For Triggering Mcp Tool Invocations From Widget Events

via “hook-based tool-use interception and transformation”

The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.

Unique: Implements a pre/post-tool-use hook system that integrates directly into the MCP execution pipeline with session-scoped lifecycle management and async support, enabling middleware-style transformations without requiring agent code modifications. Hook testing infrastructure provides validation patterns for complex hook logic.

More flexible than static tool schemas or prompt-based guardrails because hooks execute in the execution path with full access to tool context, enabling dynamic validation and transformation that adapts to runtime conditions.