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Changelog

All notable changes to this project will be documented in this file.

[2.2.0] - 2026-07-18

Added

  • type<T>() Casting Helper: Added the runtime helper and export of type(value) in core and typings to support explicit type casting for custom element properties.
  • useObjectState Hook: Introduced useObjectState to manage grouped local states with partial updates and shallow property comparisons, reducing rendering overhead.
  • SYMBOL_EVENT Branding: Added internal SYMBOL_EVENT marker to the dispatchers created by event().

Changed

  • Compiler Compatibility (TypeScript 7.0/6.0): Migrated types/tsconfig.json compiler options to target NodeNext module resolution and added "ignoreDeprecations": "6.0". Removed deprecated "baseUrl": "./".
  • useEvent Brand Verification: Updated useEvent to verify if a property/method on the custom element is an actual event dispatcher created by event() via the SYMBOL_EVENT brand check before calling it, preventing runtime crashes.
  • usePromise Default Behavior: Configured the autorun option to default to true when options are supplied as an object.
  • useListener Type Signature: Changed the event listener argument type from (event: unknown) => any to (event: any) => any to restore ergonomics for specific handler types (like MouseEvent) under strict compiler checks.

Optimized

  • TS Server Performance & Memory Usage: Replaced the expensive global constructor resolution mapping over globalThis with abstract new type constructor constraints (Types = Type<abstract new (...args: any[]) => any>), eliminating infinite loops and hangs in the IDE.
  • JSX Tag Performance (DOMCleanKeys): Substituted dynamic template literal patterns in DOMCleanKeys with a flat Exclude statement over native DOM prototypes, preventing costly string wildcards for 150+ HTML/SVG elements.
  • Default Config Fallbacks: Removed default type parameter constraints on component initialization in types/component.d.ts to ensure components without configurations default strictly to SchemaComponentGenericConfig (with empty props {}) rather than wide PropTypes, resolving type degradation on currentTarget.

Agent Skills Model Upgrades (Advantages of the New Model)

In this release, we consolidated the workspace instruction set under .agents/skills/ by replacing 14 separate, fragmented sub-skills with a single unified, structured atomico skill directory.

This restructuring offers major advantages for agentic coding and developer guidance:

  1. Drastically Reduced Context Overhead: Instead of loading multiple redundant agent skill definitions (which polluted the context window and consumed large token budgets), a single router skill manages all references.
  2. Modular Directory Structure: Reference guides and coding standards are organized into clean subdirectories (/rules and /examples). The agent only indexes what is necessary when it needs it, keeping prompt sizes minimal and reasoning speed fast.
  3. Unified Validation Pipeline: The validation checks and testing scripts (Phase 1 Semantic Lints and Phase 2 Compiler Verification) are centralized in one document, enforcing a strict contract for all code generation.
  4. Improved Maintenance and Discoverability: Developers can easily update and discover workspace guidelines in one central folder rather than maintaining fragmented skill packages.