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…100/101, 200/201, 4xx/5xx error taxonomy); xlyAi writes pending+100 only; legacy values read-compat; migration maps existing rows
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…expired key; preview save name-keyed + empty=abandon-change; previewId atomic claim; transactional batch queue + column truncation; digest zone token-budgeted; window-orphan tool_result trim; convId length cap; readFormData authoritative moduleId + /form/options permission gate (security audit); WRITE_CLAIM state-statement lookahead
