meta-transport-ipfs/CLAUDE.md

CLAUDE.md — meta-transport-ipfs

meta-share's IPFS tier, split out 2026-10 (packages/meta-share/docs/transport-plugins.md). Behaviour must stay identical to the monolith's swarm / blockstore / ingress.

Load-bearing invariants

1. The swarm is transport-only: identify/kad/mdns/bitswap. No kamilata, no gossipsub, no request_response — search is meta-search's.
2. MAX_MULTIHASH_SIZE = 64 must match meta-gateway and meta-search.
3. core2 is patched in Cargo.toml (every libp2p-0.56 bitswap impl needs the yanked ^0.4.0); mirror changes in meta-gateway.
4. ipfs_chunk.rs is kubo-identical (256 KiB raw leaves, fanout 174), in sync with meta-gateway's hash.rs and meta_feeder_sdk::hash.
5. Records are never blocks; scrub_record_blocks removes legacy MSR1 rows at boot.
6. Fetch for our user implies seed; the swarm side is provider-only — unattributed blocks over META_SHARE_LOOSE_BLOCK_MAX_BYTES are dropped.
7. gateway_discovery.rs is a MIRRORED file (meta-share hull + meta-search); scripts/check-mirrors.sh checks it.
8. Identify announces the hull's URL, never this container's.
9. Seed rows, material index and meta-core are the hull's — report them as events (seed, promoted), don't write them.
10. Mark, don't meter: dag-range /raw answers carry x-metamesh-meter: egress; single blocks don't (posters were never throttled).