Public release packet for a two-case study of context compression in long-running AI-agent research lanes. The packet includes aggregate compression metrics, clean preprints, scripts, a public-only 10,856-row latest-version snapshot of the official Model Context Protocol Registry, and a 32,834-row all-version official Registry supplement. Case 1 was a private administrative audit and is represented only by aggregate metrics. No Case 1 raw data, prompts, logs, or internal Tyche Institute files are included.