Dsh File Mount

Key features

• Model sideThe read line range is not repeated into the context (duplication marker removal)
• The missing/changed text is written into the tool result of this read (increment/rehang), and the note only records the ledger statement
• After the file is modified, only the changed lines are appended (line-level diff, log append only appends the new tail)
• Files written by AI itself can be read back for free
• The file_mount_forget tool allows models to actively force rereading.