blast_repo fixes (dart-lang/json_rpc_2#89)

auto-publish
diff --git a/pkgs/json_rpc_2/.github/workflows/publish.yaml b/pkgs/json_rpc_2/.github/workflows/publish.yaml
new file mode 100644
index 0000000..fcb7ccb
--- /dev/null
+++ b/pkgs/json_rpc_2/.github/workflows/publish.yaml
@@ -0,0 +1,14 @@
+# A CI configuration to auto-publish pub packages.
+
+name: Publish
+
+on:
+  pull_request:
+    branches: [ master ]
+  push:
+    tags: [ 'v[0-9]+.[0-9]+.[0-9]+*' ]
+
+jobs:
+  publish:
+    if: ${{ github.repository_owner == 'dart-lang' }}
+    uses: dart-lang/ecosystem/.github/workflows/publish.yaml@main
diff --git a/pkgs/json_rpc_2/README.md b/pkgs/json_rpc_2/README.md
index 2564d8a..e95a2e8 100644
--- a/pkgs/json_rpc_2/README.md
+++ b/pkgs/json_rpc_2/README.md
@@ -133,3 +133,8 @@
 class, which implements both `Client` and `Server`. It supports the same methods
 as those classes, and automatically makes sure that every message from the other
 endpoint is routed and handled correctly.
+
+## Publishing automation
+
+For information about our publishing automation and release process, see
+https://github.com/dart-lang/ecosystem/wiki/Publishing-automation.