Miroslav Drbal
8be261cd29
MCP servers using JSON Schema draft 2020-12 (e.g. servers built with Rust rmcp/schemars) emit "$schema": "https://json-schema.org/draft/2020-12/schema" and "nullable": true in tool inputSchemas. AJV (configured for draft-07) throws: Error: no schema with key or ref "https://json-schema.org/draft/2020-12/schema" This causes all tool calls from these servers to fail argument validation silently. Add sanitizeSchema() in convertSchema() — the single chokepoint for all MCP tool schemas (MCPTool and DeferredMCPTool) — that recursively strips before schemas reach AJV or any LLM provider: - $schema: meta-schema declaration, not a validation keyword. AJV rejects unknown URIs. - nullable: OpenAPI 3.0 extension, not standard JSON Schema. AJV rejects unknown keywords in strict mode. This approach keeps AJV on draft-07 with no version switch. Switching to Ajv2020 was considered but rejected: it would introduce the symmetric failure for servers that still emit draft-07 $schema URIs.
@oh-my-pi/pi-coding-agent
Core implementation package for the omp coding agent in the oh-my-pi monorepo.
For installation, setup, provider configuration, model roles, slash commands, and full CLI reference, see:
Package-specific references: