The PR #147 review forged origin: static as a JWT principal through three tools the first version never touched (brain_edit, brain_ingest_raw, ingest_raw + brain_promote), and through YAML spellings a key-name match missed (quoted, escaped, tagged, flow-mapped, merge keys, lone CR). - api.StampProvenance removes every spelling of origin/written_by from the frontmatter and appends the real values. A line is dropped if EITHER yaml.v3 (decoding quotes, escapes, tags, flow maps) or the brain's line-oriented readers would read it as provenance; complex keys, orphan values and merge keys are dropped outright. Lone CRs in frontmatter become LF. Principal values that are not bare words are quoted. - Applied as the last step of writeHallNote, UpdateNote, PromoteNote (re-attributed to the promoter), brain_edit (re-attributed to the editor) and both ingests (every page written or merged). REST /write and /promote carry no principal and stamp unknown. - Ingest: newlines in scalar fields fold to spaces; a page type must be a plain lower-case name (../raw wrote outside wiki/, pre-existing). - Audit: outcome is ok|error, never the error text, which echoed argument values. Tests: every escape from the review is a table case asserting the invariant on the file (parses as YAML, yaml.v3 and brain_get agree, exactly the stamped lines). Plus REST /write, REST capture AuthPath, body-line provenance in search, and quoted principals; two of the review's surviving flips now go red. Three tests renamed so names claim only what they assert. Refs #145 #144 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>