[meowbot-agent]

Failing

Scheduled run 43139974718:

• mcp 1.10.0 (ruby 3.4)
• mcp 1.10.0 (ruby 3.3)
• mcp 1.10.0 (ruby 4.0)

Cause

mcp 1.10.0 registers a ServerContext autoload, so const_defined? returns true before the class loads. The fresh-process regression test mistakes that registration for an already loaded class and aborts with MCP::ServerContext is already loaded.

Evidence

• First failure: PrivateMembersTest#test_probes_server_context_in_a_process_that_has_not_loaded_mcp_server [test/test_private_members.rb:34], followed by MCP::ServerContext is already loaded.
• Ruby 3.4 failure at 2026-11-12T02:15:30.3265116Z: 779 runs, 2828 assertions, 1 failures, 0 errors, 0 skips.
• Ruby 3.3 and 4.0 report the same failure and totals in the linked run.
• Last green run 42944486471 and the failed run use commit a53ca4c72b33a9393dadfad2a3163a837c3d45df. The failed matrix adds mcp 1.10.0.
• Upstream release, published 2026-11-11T14:05:34Z: “Autoload MCP::ServerContext from the gem entry point (#656)”.
• Upstream diff: lib/mcp.rb adds autoload :ServerContext, "mcp/server_context".

Change

• Distinguish pending autoloads from loaded classes with autoload?.
• Assert that neither Server nor ServerContext loads before the probes run, and retain both probe-result assertions.
• Correct comments about older MCP versions without changing runtime behavior, dependencies, or the supported matrix.

Test

• Local: git diff --check passed.
• CI only for Ruby commands because Ruby and Bundler are not installed in this worktree.
• Compatibility CI 43143572044 passed all 42 MCP/Ruby jobs at commit e5046d8c5d3519c603eefa3107b06815a8aef5be with bundle exec rake.
• Each mcp 1.10.0 job on Ruby 3.3, 3.4, and 4.0 reports 779 runs, 2829 assertions, 0 failures, 0 errors, 0 skips.
• Pull-request CI 43143571925 passed all seven jobs. COVERAGE=1 bundle exec rake and bundle exec rake test:e2e passed on Ruby 3.3, 3.4, and 4.0.
• bundle exec standardrb, bundle exec srb tc, bundle audit check --update, bundle exec rake type_coverage, and bundle exec rake rbi_freshness passed in that CI run.
• Push CI 43143564244 also passed on the same commit.

Thread

The task supplied the failed-run URL above but no Slack permalink.