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- Add dereferenceJsonSchema() that inlines local $ref pointers and strips $defs/definitions from MCP tool schemas before they reach LLM providers. Previously, Anthropic's convertTools() extracted only properties/required, dropping $defs and leaving dangling $ref — the LLM never saw the actual type definitions (e.g. SourceAnchorInput enum values from nucleus). - Silence Ajv logger (logger: false) on all three instances that use strict: false. MCP servers may declare non-standard format keywords (e.g. "uint") that caused console.warn() to corrupt TUI output. - Cache compiled Ajv validators per schema object identity in validation.ts, eliminating redundant recompilation on every tool call. Co-authored-by: Miroslav Drbal <miroslav.drbal@gendigital.com>