proof of concept of something like git-lfs but for records to declare where blobs >100MB is hosted
nekomimi.pet
1# pds-lfs
2
3git-lfs works in two ways. One is that it simply declares where files will be hosted. Its derived from the origin remote. For github as an example, it would be `https://github.com/foo/bar.git/info/lfs`. Then files, when commited to the repo, are tracked as pointers to how they're stored on the LFS remote.
4
5Here is an example of the pointer
6```
7version https://git-lfs.github.com/spec/v1
8oid sha256:4d7a214614ab2935c943f9e0ff69d22eadbb8f32b1258daaa5e2ca24d17e2393
9size 12345678
10```
11
12This is what gets tracked in Git's history.
13
14I propose a similar system for atproto records to use to define where blobs larger than 100MB are hosted. People can declare a `com.pds-lfs.host` record declaring a pds-lfs server (or alternatively just ipfs://). And then a `com.pds-lfs.pointer` with fields like
15
16```
17{
18 "$type": "com.lfs.pds.pointer",
19 "cid": "bafybeifzrx7dbmdrorwzye4f3w6slbm6a4pchoexwhfgbgqjh7fwkwvyyq",
20 "mime": "image/png",
21 "size": 206868,
22 "filename": "ljtw.png",
23 "updatedAt": "2025-08-17T19:49:10.154Z"
24}
25```
26
27I initially wanted it to be IPFS first and only, but IPFS is a complete PITA to work with. An issue with centralized pds-lfs servers is that theyre truly not in control of the user, and I would have to figure out how to do cross user auth that a user can then attest that they own the blob uploaded to a pds-lfs server. Leaving this up to garner ideas.