[CI/Build][Rust Frontend] Retire Buf schema publishing (#57046)

Co-authored-by: OpenAI Codex <noreply@openai.com>
Co-authored-by: Bugen Zhao <i@bugenzhao.com>
Signed-off-by: Julien Darve <jdarve@NVIDIA.com>

.github/workflows/buf.yml

@@ -5,12 +5,6 @@ on:
     paths:
       - "rust/proto/**"
       - ".github/workflows/buf.yml"
-  push:
-    tags:
-      - "v*"
-  schedule:
-    - cron: "0 8 * * *"
-  workflow_dispatch:
 
 permissions:
   contents: read
@@ -21,37 +15,14 @@ concurrency:
 
 jobs:
   proto:
-    if: github.repository_owner == 'vllm-project'
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
-        with:
-          fetch-depth: 0
       - uses: bufbuild/buf-action@8c6a16e16f12ba20b6470afa9c2ba9b5ba8c97c3 # v1.5.0
         with:
           version: 1.72.0
           input: rust/proto
-          token: ${{ github.repository == 'vllm-project/vllm' && github.event_name != 'pull_request' && secrets.BUF_TOKEN || '' }}
           format: false
           breaking: false
           pr_comment: false
           push: false
-      - name: Publish nightly schema
-        if: github.repository == 'vllm-project/vllm' && (github.event_name == 'schedule' || github.event_name == 'workflow_dispatch')
-        run: >-
-          buf push rust/proto
-          --create
-          --create-default-label main
-          --create-visibility public
-          --label nightly
-          --source-control-url "${{ github.server_url }}/${{ github.repository }}/commit/${{ github.sha }}"
-      - name: Publish release schema
-        if: github.repository == 'vllm-project/vllm' && github.event_name == 'push'
-        run: >-
-          buf push rust/proto
-          --create
-          --create-default-label main
-          --create-visibility public
-          --label main
-          --label "${GITHUB_REF_NAME}"
-          --source-control-url "${{ github.server_url }}/${{ github.repository }}/commit/${{ github.sha }}"

rust/proto/README.md

@@ -2,14 +2,10 @@
 
 This directory is the canonical source for vLLM's gRPC schema.
 
-The schema is published to `buf.build/vllm-project/vllm`:
-
-- A daily workflow publishes the latest Git `main` schema to the `nightly` label.
-- The workflow can be run manually to retry nightly publication.
-- Tags matching `v*` update the Buf `main` label and publish the corresponding release label.
-- Buf commits and generated SDK versions are immutable and can be pinned by consumers.
-
-Repository setup requires a `BUF_TOKEN` GitHub Actions secret with permission to create and push the public Buf module. Register the Prost and Tonic generated SDKs for the `main` and `nightly` labels once so subsequent pushes generate them automatically.
+Schema updates are no longer published to the Buf Schema Registry. Rust consumers
+should use `vllm-proto` from crates.io; consumers in other languages can generate
+bindings from the `.proto` files in this directory. Buf still builds and lints
+the schemas on pull requests, including on forks.
 
 ## Rust crate
 
@@ -47,8 +43,7 @@ change PR. This check becomes available after the first manual publication.
    The `proto-crate.yml` workflow checks that the tag matches the crate version,
    verifies the package, and publishes it to crates.io.
 
-Use `proto-v*` tags so they do not trigger Buf's `v*` release workflow. There is
-no scheduled crate publication. Pull requests and manual workflow runs only
+There is no scheduled crate publication. Pull requests and manual workflow runs only
 verify packaging, including on forks. Retry a failed release by rerunning its
 tag workflow; crates.io versions cannot be overwritten.
 

rust/proto/buf.md

@@ -1,8 +0,0 @@
-# vLLM gRPC API
-
-Protocol definitions for the optional gRPC server exposed by the vLLM Rust frontend.
-
-- `Inference` provides unary and streaming generation.
-- `Control` provides discovery and request control.
-
-The `nightly` label is updated daily from vLLM's `main` branch. The `main` label tracks the latest vLLM release, and version labels match tags such as `v0.27.0`. Pin a Buf commit or generated SDK version for reproducible builds.

rust/proto/buf.yaml

@@ -1,7 +1,6 @@
 version: v2
 modules:
   - path: .
-    name: buf.build/vllm-project/vllm
 lint:
   use:
     - MINIMAL