refactor(agent-loop): drop the steering/message session event

Steer, inject, and followup now land as durable user/message events on the
session surface; the steering/message event type and its ConversationNode
kind are removed from the client projection. Update tests, docs, generated
catalogs, and agent notes to match, and align the steering e2e fixture and
prompt inventory assertions with the durable user/message landing.
This commit is contained in:
_Kerman
2026-08-03 16:04:26 +08:00
parent f4a2e0d10a
commit cb2f01f48c
86 changed files with 243 additions and 458 deletions
@@ -6,7 +6,7 @@ English | [中文](2026-07-29-human-transcript-append-origin.zh.md)
## Problem
The terminal and the host history gateway both treated the model-visible surface as the human transcript. A successful compaction replaces a surface range with one checkpoint node, so the moment that replacement landed the terminal dropped every message it shadowed — conversation the user had already read — and re-ran that destructive rebuild on any later replacement. The same confusion reached pagination: `maxMessages` counted every `user/message`, `assistant/message`, and `steering/message` in the window, so a model-only replacement copy consumed a page slot the human never filled, and the cut could land between a compaction's log-only provenance and the replacement that cites it.
The terminal and the host history gateway both treated the model-visible surface as the human transcript. A successful compaction replaces a surface range with one checkpoint node, so the moment that replacement landed the terminal dropped every message it shadowed — conversation the user had already read — and re-ran that destructive rebuild on any later replacement. The same confusion reached pagination: `maxMessages` counted every `user/message` and `assistant/message` in the window, so a model-only replacement copy consumed a page slot the human never filled, and the cut could land between a compaction's log-only provenance and the replacement that cites it.
Nothing was lost from the log. `Session.events` still held every original message and full tool result; the surface only decides what the model is sent next. The defect was entirely in the projection.
@@ -6,7 +6,7 @@ Status: implemented
## Problem
终端与宿主历史网关都把模型可见的 surface 当作人类可读记录(transcript)。一次成功的压缩(compaction)会用一个检查点节点替换一段 surface 范围,因此该替换一落地,终端就丢弃了它所遮蔽的每条消息——那些是用户已经读过的对话——并在此后任何替换到来时重新执行这次破坏性重建。同样的混淆也波及分页:`maxMessages` 统计窗口内的每个 `user/message``assistant/message``steering/message`,于是仅供模型使用的替换副本占用了一个人类从未填充的页面额度,而切分点还可能落在压缩的仅日志溯源信息与引用它的替换之间。
终端与宿主历史网关都把模型可见的 surface 当作人类可读记录(transcript)。一次成功的压缩(compaction)会用一个检查点节点替换一段 surface 范围,因此该替换一落地,终端就丢弃了它所遮蔽的每条消息——那些是用户已经读过的对话——并在此后任何替换到来时重新执行这次破坏性重建。同样的混淆也波及分页:`maxMessages` 统计窗口内的每个 `user/message``assistant/message`,于是仅供模型使用的替换副本占用了一个人类从未填充的页面额度,而切分点还可能落在压缩的仅日志溯源信息与引用它的替换之间。
日志本身没有丢失任何内容。`Session.events` 仍保存着每条原始消息和完整的工具结果;surface 只决定接下来发送给模型的内容。缺陷完全在投影层。