vision / 9cca78edaf09

add file/directory verbs (read/write/mkdir/fsync/atomic-rename/remove) with byte payloads and but-if failures; FAIL_UNWRITABLE; files oracle + 110 harden cases (771/771); reflect decided surfaces in VISION.md

dev · 2 days ago · 2026-06-23 · 476.1 KB

session: stone 2 file verbs · agent: claude-opus-4-8

parent: a2ebc42faad4