- Added a test asserting `obfuscate` produces byte-identical output when re-run over the same content across turns, the invariant that keeps obfuscated history prompt-cache-stable.
- Added a test asserting earlier-message placeholders stay stable when a later message reveals a new regex-discovered secret.
- Migrated all wire protocol, schema definitions, and tools validation from Zod to ArkType across multiple packages.
- Updated extension runtimes, custom tools loader, and TypeBox compatibility shim to expose and use ArkType instances.
- Added a comprehensive ArkType migration guide, validation parity tests, and helper utilities.
- Removed redundant PDF asset routing and parsing implementations from the read tool.
Converted provider-facing tool parameters to wire JSON Schema before redaction so live Zod instances are not deep-cloned into plain objects.
Fixes#2146
Redacted configured secrets across provider-facing system prompts, tool definitions, developer reminders, and assistant tool-call payloads before LLM requests.
Fixes#2146
can1357