Two rulings (2026-07-29). Copy flows that stamp descendants preflight the whole subtree and refuse loudly naming the offender — the nested-uneditable silent skip is reversed; nothing partial ever lands, and post-preflight failures clean up wholesale per the construct-then-clean precedent; whole-board forks stamp nothing and stay exempt. No-sensible-reading fallbacks now log field, path, and raw text as coerce-tier Defect-stream entries — the one silent-and-unlogged recovery joins the family posture, and the stream is where real-world shapes get promoted to heuristic heals. The doctrine both rulings flow from is now stated in the taxonomy preamble: leniency recovers recoverable issues through reliable service-owned heuristics, never accepts loss that could surprise the user, and "proceed partially, lose a little" is never a verdict.
Board: Minor cards 70b3e4ba + fcc5a70b → Resolved. Code realign queued: stampCopiedDescendant leniency → subtree preflight; FrontmatterFields fallbacks → Defect stream.
Claude-Session: https://claude.ai/code/session_01CqjXB7ASoWtbyoGod68k97
18 golden fixture boards as real on-disk trees under Fixtures/ — ten
valid/tolerated cases (rich board, interrupted create, non-UUID strays,
stray files, tombstones, tie-breaks, unknown-key order, coercion,
last-wins duplicates, board-level deleted) and eight fail-fast cases,
each pinned to its exact error reason and path; the rich board's whole
tree round-trips byte-identically. Pins two contract subtleties now
recorded in the design: tombstone flags are not inherited (renderers
walk ancestors) and last-wins resolves before order strictness. README
gains the storage-foundation feature entry. 146 tests total.
Claude-Session: https://claude.ai/code/session_018BjQRYBR6jQja3jCRi5S3A
rzen