Merge origin/master into codex/send-one-turn

# Conflicts:
#	docs/cordis-catalog/events.md
#	docs/event-producer-consumer.md
#	docs/persistence-catalog.md
#	packages/core/agent-loop/src/loop.ts
#	packages/core/agent/README.md
#	website/zh-CN/api/harness/events.md

packages/ui/stdio/src/index.ts

@@ -145,6 +145,10 @@ export function createStdioChat(ctx: Context, config: Config, runtime: StdioRunt
       inReasoning = false
       output.write(`\n  [tool call] ${toolName}(${args})`)
     } else if (event.type === 'tool/result') {
+      // A surface replacement changes future model context; it is not another
+      // execution. Keep the original full-fidelity terminal presentation and
+      // suppress duplicate output during live delivery or log replay.
+      if (event.surfaceOp !== undefined && event.surfaceOp !== 'append') return
       const { content } = event.data
       const text = content.filter(block => block.type === 'text').map(block => block.text).join('')
       output.write(`\n  [tool result] ${text}\n  `)