Wire format for serving + fetching type docs (plans/fed-sx-host-types.md
step 3).
http_server.erl:
- new type_doc Accept format + content type
(application/vnd.fed-sx.type-doc), distinct from actor-doc.
- GET /types/<cid> -> the cached TypeRecord term_codec-encoded, 404 if
not in the peer_types cache. Reads peer_types via a Cfg
{peer_types, peer_types} guard (hardcoded registered atom, mirroring
the actor-doc route's kernel guard).
discovery_type_fetch.erl — sibling of discovery_fetch. make_fetch_fn
produces the fun/2 peer_types:lookup_or_fetch calls: GET
<base>/types/<cid> with the type-doc Accept header, returning the RAW
bytes (peer_types owns the term_codec decode, so the wire format lives
in one place — the route encodes, the cache decodes). Cfg carries
type_url / type_url_fn for TypeCid -> base URL resolution.
Tests: next/tests/peer_types_route.sh (13, in-process route dispatch),
next/tests/discovery_type_fetch.sh (9, closure vs a python type-doc
stub, end-to-end through peer_types:lookup_or_fetch).
No regression: http_accept, http_actors, http_get_format,
discovery_fetch all still green. Conformance 771/771.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
giles
441a895737