- Introduce `@oh-my-pi/omptype` as a new ArkType-compatible schema validation package featuring a lazy JIT runtime, JSON Schema emission, and compatibility adapters.
- Replace `arktype` across workspace packages and test utilities with `@oh-my-pi/omptype`.
- Add benchmark suites, tests, and documentation for the new validation engine and adapters.
- Update workspace build, test runner, and release configurations to include the new package.
- Explicitly prohibited HTML escaping in tool arguments for all dialects to ensure raw data transmission.
- Clarified that tool call bodies are delimiter-parsed rather than XML-parsed where applicable.
- Enforced strict requirements to complete tool call output before emitting stop sequences and halting.
- Added test cases to verify that native tool descriptions are pruned when pruneToolDescriptions is enabled.
- Confirmed that in-band tool descriptions persist for owned dialects (e.g., GLM) even when pruning is enabled for native tools.
- 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.
- Replaced `PI_OWNED_TOOLS` lookups and owned-dialect documentation in `agent-loop.ts` and `types.ts` with `PI_DIALECT`.
- Added `prompt-tools-loop.test.ts` coverage that an unset `config.dialect` still selects Hermes from `Bun.env.PI_DIALECT`.
- Documented the breaking `PI_DIALECT` rename in `packages/agent/CHANGELOG.md`.
- Renamed ToolCallSyntax type to Dialect and Grammar interface to DialectDefinition across all packages.
- Moved grammar directory to dialect and updated all import paths in agent, ai, catalog, and coding-agent packages.
- Added renderTranscript and renderThinking methods to DialectDefinition, enabling native dialect-aware conversation serialization.
- Consolidated rendering utilities into new dialect/rendering.ts with shared helpers for ChatML, legacy text, and dialect-specific formatting.
- Updated conversation serialization in agent and coding-agent to use dialect.renderTranscript() for native turn envelope rendering.
- Added optional Agent and SDK tool-call syntax controls (`toolCallSyntax`, `PI_OWNED_TOOLS`) for owned calls.
- Added in-band grammar scanners and renderers for Anthropic, DeepSeek, GLM, Hermes, Kimi, PI, and Qwen3.
- Added supportsTools propagation and model schema updates to route unsupported models to fallback syntax.
- Replaced stream-markup parsing with syntax-specific in-band scanners and event conversion.
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