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2 Commits
Author SHA1 Message Date
mathiasandClaude Opus 5.5 32dedb318d feat(brain): stamp server-owned write provenance; surface it in brain_query
CI / Lint / Test / Vet (pull_request) Successful in 43s
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brain_write was an ungated, durable prompt-injection path: a session that
just read an untrusted page could write an entry every later session
retrieves as trusted guidance (OWASP MCP06). Decision (#145): tag
provenance rather than stage writes.

Every write and update stamps origin (static | jwt | unknown) and
written_by (the authenticated principal) into frontmatter. Server-owned:
origin/written_by in caller content or an update fragment are discarded,
so a caller cannot claim a more trusted origin. No principal stamps
origin: unknown, never silence. brain_update re-stamps to the last
writer. capture (the claude.ai connector door) stamps too, via a new
server-derived CaptureContext.AuthPath set by both capture doors after
decode. REST POST /write carries no principal and stamps unknown.

brain_query results carry origin/written_by when the note has them;
older notes omit them rather than fabricate. brain_get already returns
frontmatter.

Refs #145

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-01 20:49:11 +02:00
mathiasandClaude Opus 5.5 a9a9eebe26 feat(brain-mcp): audit-log every tools/call with principal and scope
brain_query and brain_read left no record of who read what; only capture
and governance edits reached the audit sink (OWASP MCP08).

One slog record per call: tool, principal, origin (static/jwt/unknown),
wing/hall when given, outcome, duration. Content is reduced to
content_bytes so the audit line never copies brain content.

Refs #144

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-01 20:44:21 +02:00