Add anthropics/buffa and anthropics/connect-rust plugins

plugins/anthropics/buffa/source.yaml

@@ -0,0 +1,3 @@
+source:
+  crates:
+    crate_name: protoc-gen-buffa

plugins/anthropics/buffa/v0.5.2/.dockerignore

@@ -0,0 +1,2 @@
+*
+!Dockerfile

plugins/anthropics/buffa/v0.5.2/Dockerfile

@@ -0,0 +1,15 @@
+# syntax=docker/dockerfile:1.23
+FROM rust:1.95.0-alpine3.23@sha256:606fd313a0f49743ee2a7bd49a0914bab7deedb12791f3a846a34a4711db7ed2 AS builder
+RUN apk add --no-cache musl-dev
+WORKDIR /app
+ENV CARGO_REGISTRIES_CRATES_IO_PROTOCOL=sparse
+RUN --mount=type=cache,target=/usr/local/cargo/registry,sharing=locked --mount=type=cache,target=/root/target \
+    cargo install protoc-gen-buffa --version 0.5.2 --locked --root /app
+
+FROM gcr.io/distroless/static-debian13:latest@sha256:47b2d72ff90843eb8a768b5c2f89b40741843b639d065b9b937b07cd59b479c6 AS base
+
+FROM scratch
+COPY --link --from=base / /
+COPY --link --from=builder /app/bin/protoc-gen-buffa /protoc-gen-buffa
+USER nobody
+ENTRYPOINT ["/protoc-gen-buffa"]

plugins/anthropics/buffa/v0.5.2/buf.plugin.yaml

@@ -0,0 +1,45 @@
+version: v1
+name: buf.build/anthropics/buffa
+plugin_version: v0.5.2
+source_url: https://github.com/anthropics/buffa
+description: Generates Rust message types with buffa, a zero-copy Protobuf implementation with editions support and no_std compatibility.
+output_languages:
+  - rust
+spdx_license_id: Apache-2.0
+license_url: https://github.com/anthropics/buffa/blob/v0.5.2/LICENSE
+registry:
+  cargo:
+    rust_version: "1.85"
+    deps:
+      # Runtime: wire format, Message trait, view types, JSON helpers.
+      # https://github.com/anthropics/buffa/blob/v0.5.2/buffa/Cargo.toml
+      - name: "buffa"
+        req: "0.5.2"
+        default_features: true
+        features:
+          - json
+      # Well-known types (Timestamp, Duration, Any, Struct, etc.).
+      # Generated code references these via the auto-injected
+      # extern_path mapping `.google.protobuf` -> `::buffa_types::google::protobuf`.
+      - name: "buffa-types"
+        req: "0.5.2"
+        default_features: true
+        features:
+          - json
+      # Generated code derives `::serde::Serialize` / `::serde::Deserialize`
+      # directly when json=true, so serde must be a direct dep.
+      - name: "serde"
+        req: "1"
+        default_features: true
+        features:
+          - derive
+  opts:
+    # Enable serde derives + proto3 JSON mapping helpers. Required for
+    # downstream plugins that need the Connect protocol's JSON codec.
+    - json=true
+    # Zero-copy view types. Default, but explicit for clarity.
+    - views=true
+    # Emit one `<dotted.package>.rs` per proto package instead of one
+    # file per proto file. Matches the prost/tonic filename convention
+    # the BSR Rust SDK lib.rs synthesis expects.
+    - file_per_package=true

plugins/anthropics/connect-rust/source.yaml

@@ -0,0 +1,3 @@
+source:
+  crates:
+    crate_name: connectrpc-codegen

plugins/anthropics/connect-rust/v0.4.2/.dockerignore

@@ -0,0 +1,2 @@
+*
+!Dockerfile

plugins/anthropics/connect-rust/v0.4.2/Dockerfile

@@ -0,0 +1,17 @@
+# syntax=docker/dockerfile:1.23
+FROM rust:1.95.0-alpine3.23@sha256:606fd313a0f49743ee2a7bd49a0914bab7deedb12791f3a846a34a4711db7ed2 AS builder
+RUN apk add --no-cache musl-dev
+WORKDIR /app
+ENV CARGO_REGISTRIES_CRATES_IO_PROTOCOL=sparse
+# The protoc-gen-connect-rust binary is a [[bin]] target in the
+# connectrpc-codegen crate. cargo install compiles it by crate name.
+RUN --mount=type=cache,target=/usr/local/cargo/registry,sharing=locked --mount=type=cache,target=/root/target \
+    cargo install connectrpc-codegen --version 0.4.2 --locked --root /app
+
+FROM gcr.io/distroless/static-debian13:latest@sha256:47b2d72ff90843eb8a768b5c2f89b40741843b639d065b9b937b07cd59b479c6 AS base
+
+FROM scratch
+COPY --link --from=base / /
+COPY --link --from=builder /app/bin/protoc-gen-connect-rust /protoc-gen-connect-rust
+USER nobody
+ENTRYPOINT ["/protoc-gen-connect-rust"]

plugins/anthropics/connect-rust/v0.4.2/buf.plugin.yaml

@@ -0,0 +1,55 @@
+version: v1
+name: buf.build/anthropics/connect-rust
+plugin_version: v0.4.2
+source_url: https://github.com/anthropics/connect-rust
+description: Generates ConnectRPC service traits, typed clients, and monomorphic dispatchers for Rust. Compatible with the Connect, gRPC, and gRPC-Web protocols. Passes the full ConnectRPC conformance suite.
+deps:
+  - plugin: buf.build/anthropics/buffa:v0.5.2
+output_languages:
+  - rust
+spdx_license_id: Apache-2.0
+license_url: https://github.com/anthropics/connect-rust/blob/v0.4.2/LICENSE
+registry:
+  cargo:
+    rust_version: "1.88"
+    deps:
+      # ConnectRPC runtime: Router, Context, ConnectError, client transports.
+      # https://github.com/anthropics/connect-rust/blob/v0.4.2/connectrpc/Cargo.toml
+      - name: "connectrpc"
+        req: "0.4.2"
+        default_features: true
+      # Generated service stubs use buffa::Message, buffa::view::OwnedView,
+      # buffa::bytes::Bytes directly. Message types live in the buffa SDK
+      # crate (via the plugin dep above); this dep is for the runtime API.
+      - name: "buffa"
+        req: "0.5.2"
+        default_features: true
+      # Well-known types. Service stubs whose request/response types are
+      # WKTs (e.g. google.longrunning.Operations) reference them as
+      # `::buffa_types::google::protobuf::...`, mirroring buffa-codegen's
+      # extern_path mapping for `.google.protobuf`. Must be a direct dep
+      # so the `::buffa_types` path resolves in the generated crate.
+      - name: "buffa-types"
+        req: "0.5.2"
+        default_features: true
+        features:
+          - json
+      # Streaming method signatures use futures::Stream.
+      - name: "futures"
+        req: "0.3"
+        default_features: true
+      # Client transport bounds reference http_body::Body.
+      - name: "http-body"
+        req: "1"
+        default_features: true
+  # The plugin accepts `extern_path=.=<rust_path>` (or the shorthand
+  # `buffa_module=<rust_path>`) to tell it where the buffa-generated message
+  # types live. BSR should inject this based on the buffa dep's SDK crate
+  # name, same as tonic receives extern_path for its prost dep. Leaving
+  # it out here; please advise if an explicit entry is needed.
+  opts:
+    # Emit one `<dotted.package>.rs` per proto package, mirroring the
+    # buffa plugin's `file_per_package=true` opt. Matches the
+    # prost/tonic filename convention the BSR Rust SDK lib.rs
+    # synthesis expects.
+    - file_per_package

tests/plugins_test.go

@@ -75,6 +75,11 @@ exec docker run --log-driver=none --rm -i {{.ImageName}}:{{.Version}} "$@"
 		"buf.build/community/neoeinstein-prost-serde": {"no_include"},
 		"buf.build/community/neoeinstein-tonic":       {"no_include"},
 		"buf.build/community/mercari-grpc-federation": {"paths=source_relative"},
+		// connect-rust generates service stubs only and resolves message types
+		// via extern_path, which the BSR injects from the deps: chain at SDK
+		// build time. The standalone test harness has no dep chain, so provide
+		// a placeholder catch-all mapping.
+		"buf.build/anthropics/connect-rust": {"extern_path=.=crate"},
 	}
 	// Some plugins do not generate any code for the test protos, so we allow an empty plugin.sum file for these
 	// plugins. The format of the map is map[pluginName]map[image]bool, where the bool indicates whether an empty

tests/testdata/buf.build/anthropics/buffa/v0.5.2/eliza/plugin.sum

@@ -0,0 +1 @@
+h1:ktcklOdY2UGmhTov4n3zaTVV0iCPTFbaog1tzH7DP/c=

tests/testdata/buf.build/anthropics/buffa/v0.5.2/petapis/plugin.sum

@@ -0,0 +1 @@
+h1:kF+N9OmF6c28gEY8W515PuHMwC/Cf0aA5oCSzA1URIw=

tests/testdata/buf.build/anthropics/connect-rust/v0.4.2/eliza/plugin.sum

@@ -0,0 +1 @@
+h1:SRIzgpj/ikb2VPSKtC+vrgyo5GRTj/uXOIbVZZlP2W0=

tests/testdata/buf.build/anthropics/connect-rust/v0.4.2/petapis/plugin.sum

@@ -0,0 +1 @@
+h1:StGZ3okU/OTwEG8vTwI/Qgfmo1UZ665jvZD6YjRGR/w=