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/core/agent-loop/src/agent.ts

@@ -252,7 +252,6 @@ export class ReactLoopAgent implements Agent {
     const context = {
       content,
       source,
-      ...options?.envelope !== undefined ? { envelope: options.envelope } : {},
       ...options?.meta !== undefined ? { meta: options.meta } : {},
     }
     if (isTurnOpen(this.session)) {

packages/core/agent-loop/src/loop.ts

@@ -258,11 +258,10 @@ async function runTurn(
       session.append('user/message', { content, source: message.source }, { surfaceOp: 'append' })
       // Every `allow.additionalContexts` entry is a separate context/message the
       // next request also sees. The turn is open, so inject() appends each one
-      // into THIS turn without flattening provenance, framing, or metadata.
+      // into THIS turn without flattening provenance or metadata.
       for (const context of promptDecision.additionalContexts ?? []) {
         agent.inject(context.content, {
           source: context.source,
-          ...context.envelope !== undefined ? { envelope: context.envelope } : {},
           ...context.meta !== undefined ? { meta: context.meta } : {},
         })
       }