ci: publish Ruby gem to GitHub Packages

Author: nficano

.github/workflows/publish.yml

@@ -12,10 +12,11 @@ on:
 
 permissions:
   contents: read
+  packages: write
 
 jobs:
   publish:
-    name: Publish to RubyGems
+    name: Publish gem
     runs-on: ubuntu-latest
     environment: rubygems
     steps:
@@ -33,6 +34,16 @@ jobs:
       - name: Build gem
         run: gem build arcp.gemspec
 
+      - name: Publish to GitHub Packages
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          mkdir -p ~/.gem
+          printf -- "---\n:github: Bearer %s\n" "$GITHUB_TOKEN" > ~/.gem/credentials
+          chmod 0600 ~/.gem/credentials
+          gem push --key github --host https://rubygems.pkg.github.com/agentruntimecontrolprotocol arcp-*.gem
+          rm -f ~/.gem/credentials
+
       - name: Publish to RubyGems
         env:
           GEM_HOST_API_KEY: ${{ secrets.RUBYGEMS_API_KEY }}

CONTRIBUTING.md

@@ -131,11 +131,13 @@ the changelog. Prefer clarity over cleverness in a library others build on.
 ## Releases
 
 Releases are cut by maintainers. The gem is published to
-[RubyGems.org](https://rubygems.org/gems/arcp); pushing a `v*` tag triggers the
-`publish` GitHub Actions workflow, which builds `arcp.gemspec` and runs
-`gem push`. The SDK is versioned with semantic versioning independently of the
-protocol version it speaks; a protocol version bump is noted in the changelog
-when the negotiated ARCP version changes.
+[RubyGems.org](https://rubygems.org/gems/arcp) and GitHub Packages; pushing a
+`v*` tag triggers the `publish` GitHub Actions workflow, which builds
+`arcp.gemspec`, publishes the gem to GitHub Packages under the
+`agentruntimecontrolprotocol` namespace, and then runs `gem push` for RubyGems.
+The SDK is versioned with semantic versioning independently of the protocol
+version it speaks; a protocol version bump is noted in the changelog when the
+negotiated ARCP version changes.
 
 ## License
 

arcp.gemspec

@@ -15,14 +15,15 @@ Gem::Specification.new do |spec|
     replay, capability negotiation, leases with budget and expiration, streamed
     results, and OpenTelemetry trace propagation. Built on socketry/async.
   DESC
-  spec.homepage    = 'https://github.com/nficano/arpc'
+  spec.homepage    = 'https://github.com/agentruntimecontrolprotocol/ruby-sdk'
   spec.license     = 'Apache-2.0'
 
   spec.required_ruby_version = '>= 3.3.0'
 
-  spec.metadata['changelog_uri']         = "#{spec.homepage}/blob/main/ruby-sdk/CHANGELOG.md"
-  spec.metadata['source_code_uri']       = 'https://github.com/nficano/arpc.git'
+  spec.metadata['changelog_uri']         = "#{spec.homepage}/blob/main/CHANGELOG.md"
+  spec.metadata['source_code_uri']       = "#{spec.homepage}.git"
   spec.metadata['bug_tracker_uri']       = "#{spec.homepage}/issues"
+  spec.metadata['github_repo']           = 'ssh://github.com/agentruntimecontrolprotocol/ruby-sdk'
 
   spec.files = Dir[
     'lib/**/*.rb',