a2a.compat.v0_3.extension_headers module

Shared header name constants for v0.3 extension compatibility.

The current spec uses A2A-Extensions. v0.3 used the X- prefixed X-A2A-Extensions form. v0.3 compat servers and clients accept/emit both names so they can interoperate with peers that only know the legacy one.

a2a.compat.v0_3.extension_headers.add_legacy_extension_header(parameters: dict[str, str]) → None

Mirrors the A2A-Extensions parameter under its legacy name in-place.

Used by v0.3 compat client transports so that requests can be understood by older v0.3 servers that only recognize X-A2A-Extensions.