refactor(agent): unify sourced message delivery

scripts/smoke-python-runtime.py

@@ -732,8 +732,6 @@ def scrub_snapshot_header(value: dict[object, object]) -> None:
                 tool.get("name") if isinstance(tool, dict) else "{{tools}}"
                 for tool in tools
             ]
-        if isinstance(header.get("messagePrefix"), list):
-            header["messagePrefix"] = ["{{messagePrefix}}" for _ in header["messagePrefix"]]
 
 
 def render_jsonl(records: list[object]) -> str:

scripts/type-equiv.manifest.json

@@ -151,16 +151,6 @@
       "symbol": "SendOptions",
       "source": "packages/core/agent/src/types.ts"
     },
-    {
-      "doc": "docs/core-data-structures/core.md",
-      "symbol": "AliasSendOptions",
-      "source": "packages/core/agent/src/types.ts"
-    },
-    {
-      "doc": "docs/core-data-structures/core.zh.md",
-      "symbol": "AliasSendOptions",
-      "source": "packages/core/agent/src/types.ts"
-    },
     {
       "doc": "docs/core-data-structures/core.md",
       "symbol": "AgentMessageId",
@@ -211,16 +201,6 @@
       "symbol": "Agent",
       "source": "packages/core/agent/src/types.ts"
     },
-    {
-      "doc": "docs/core-data-structures/core.md",
-      "symbol": "AdditionalContext",
-      "source": "packages/core/agent/src/types.ts"
-    },
-    {
-      "doc": "docs/core-data-structures/core.zh.md",
-      "symbol": "AdditionalContext",
-      "source": "packages/core/agent/src/types.ts"
-    },
     {
       "doc": "docs/core-data-structures/core.md",
       "symbol": "PromptDecision",