2026-07-14 (layout): ADOPTED "default to the local tier when in doubt". An artefact

2026-07-14 (layout): ADOPTED "default to the local tier when in doubt". An artefact whose home is unclear (tool exports, oracle/review output, traces, intermediate analysis) goes to .abcd/.work.local/scratch/ or logs/ FIRST — never the repo root, never a tracked directory on a guess. Promotion to .abcd/work/ or .abcd/development/ is cheap and always available later; demotion is not, because a wrongly-committed artefact is already in the history. Guessing upward is irreversible; guessing downward costs nothing. Prompted by a RepoPrompt oracle export landing in a top-level prompt-exports/ during this session (moved to .abcd/.work.local/scratch/prompt-exports/). Recorded in AGENTS.md § Working-tree layout, the canonical home, rather than a new doc.