- Introduced selective adoption fixture with README and package.json to ensure core facade exposure without browser adapter import. - Implemented core functionality in core.mjs and browser adapter in browser.mjs, ensuring no global state mutation. - Created verification script to validate selective adoption behavior and module exports. - Added streaming cleanup fixture with README and collect.mjs to implement lazy resource acquisition and async iterable return. - Developed verification script for streaming cleanup to ensure proper resource management and disposal. - Updated sources.json with new references related to library design and resource management. - Created build-libraries initialization report detailing the scope, accepted skill surface, ecosystem position, and verification processes. Signed-off-by: Okiki Ojo <hey@okikio.dev>