Establish OpenCode compatibility certification corpus

ruby/opencode_ruby_fixture_contract.rb

@@ -0,0 +1,69 @@
+# frozen_string_literal: true
+
+require "json"
+
+root = File.expand_path("..", __dir__)
+gem_path = File.expand_path(ENV.fetch("OPENCODE_RUBY_PATH"))
+$LOAD_PATH.unshift(File.join(gem_path, "lib"))
+require "opencode-ruby"
+
+manifest = JSON.parse(File.read(File.join(root, "fixtures/manifest.json")))
+failures = []
+
+manifest.fetch("fixtures").each do |entry|
+  reply = Opencode::Reply.new
+  event_path = File.join(root, "fixtures", entry.fetch("events"))
+  expected_path = File.join(root, "fixtures", entry.fetch("expected"))
+
+  File.foreach(event_path) do |line|
+    next if line.strip.empty?
+
+    reply.apply(JSON.parse(line, symbolize_names: true))
+  end
+
+  result = reply.result
+  expected = JSON.parse(File.read(expected_path))
+  actual = {
+    "full_text" => result.full_text,
+    "reasoning_text" => result.reasoning_text,
+    "tool_count" => result.tool_parts.length,
+    "prompt_blocked" => reply.prompt_blocked?,
+    "total_cost" => reply.total_cost,
+    "total_input_tokens" => reply.total_input_tokens,
+    "total_output_tokens" => reply.total_output_tokens
+  }
+
+  if (tool_expectation = expected["tool"])
+    tool = result.tool_parts.first || reply.parts.find { |part| part["type"] == "tool" }
+    actual["tool"] = {
+      "tool" => tool&.fetch("tool", nil),
+      "status" => tool&.fetch("status", nil),
+      "callID" => tool&.fetch("callID", nil),
+      "opencode_request_id" => tool&.dig("input", "opencode_request_id")
+    }
+    expected["tool"] = tool_expectation
+  end
+
+  expected.each do |key, value|
+    next if actual[key] == value
+
+    failures << "#{entry.fetch("id")}: #{key} expected #{value.inspect}, got #{actual[key].inspect}"
+  end
+
+  unless failures.any? { |failure| failure.start_with?("#{entry.fetch("id")}:") }
+    puts "PASS #{entry.fetch("id")}"
+  end
+end
+
+unless failures.empty?
+  warn failures.join("\n")
+  exit 1
+end
+
+puts JSON.generate(
+  status: "pass",
+  adapter: "opencode-ruby",
+  adapter_version: Opencode::VERSION,
+  adapter_commit: ENV["OPENCODE_RUBY_COMMIT"],
+  fixture_count: manifest.fetch("fixtures").length
+)