semantic-parity.md is based on Stream eb95c14, but experiment 6 deployed 29705cb. Fifteen commits separate them and three touch bootstrap behaviour the audit has rows for: the byte-budget deletion (e2ab25c), concurrent repository parsing (fb3cea4), and the batch deadlock fix (fcc63f8). Deliberately does NOT rewrite the basis hash to 29705cb. Moving it would assert an audit nobody performed, which is the exact failure the file's opening paragraph forbids. Records the gap, names the three commits owed a re-confirmation, and leaves re-basing as its own explicit act. Also defines Atmos, which appears in four docs and is never explained: the Go atproto library upstream runs, pinned here as a comparison reference rather than as a Stream dependency -- which is why it is correctly absent from build.zig.zon. Notes by contrast that the Zat pin does match. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>