- B1: search.extractProvenance locates the frontmatter with
frontmatter.Split (fence at column 0), so an indented "---" inside a
block scalar no longer hides provenance from brain_query.
- B2: brain_edit refuses to edit without a snapshot, and if the stamp
cannot be verified restores the note and reports failure; a failed
restore is reported as exactly that, never as "rolled back".
- B3: internal/provenance gets direct tests for the whole-document
backstop (a stamp that cannot read back is refused), standalone group
decoding, duplicates, lone CR, tab continuations and unclosable
fences. Removing verify or the restore now fails the suite.
- Principals YAML would read as non-strings (true, 123, null, ~) are
quoted instead of refused. An unclosable fence ("---x") is refused
rather than demoted into the body. writeHallNote creates the hall
directory only after the note passes, so a refused write leaves
nothing behind (brain#21).
- MCP brain_ingest (stub LLM) asserted to stamp the caller.
Refs #145#144
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
