ca84ee760d
- Consolidated AI provider imports through register-builtins and moved Gemini/Antigravity header helpers to a shared module. - Added lazy loading for heavy providers and SDK-backed modules with cached initialization to trim startup cost. - Converted markdown conversion helpers to async and awaited htmlToBasicMarkdown in affected scraper and kernel output paths. - Parsed bundled agent definitions on-demand and moved BrowserTool prompt rendering behind a memoized getter. - Added cached validation/error handling paths by replacing AJV runtime checks with Value.Check and trimming validation error output.