Add includeBuiltins parameter to Brain.getReplState/JavaScriptPlanner.describeGlobals to optionally skip REPL builtins (skip/use/log/forget_conversation), default to excluding builtins in get_state MCP tool to reduce noise (pass includeBuiltins:true to include them), update SKILL.md documenting builtin filtering behavior, add tests verifying get_state calls getReplState with includeBuiltins flag, ad