feat(tui): /details command sets card visibility and reasoning display

/details reports the transcript detail state bare, jumps tool cards to
collapsed|expanded|hidden, and sets or toggles reasoning blocks, sharing
the closure state behind Ctrl+O/Ctrl+R via setToolsVisibility/setReasoning.

Also fixes a replay defect the reasoning rebuild exposed: rebuildTranscript
reused a settled StreamingAssistantComponent for a later assistant/message
of the same step, overwriting the earlier content; the settled check now
lives in renderEvent for both live and replay paths (untrusted-controls
re-recorded with the previously dropped content present).
This commit is contained in:
Turtle
2026-07-30 18:26:26 +08:00
parent 651417e01c
commit 3899a26c87
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# Bilingual-pair consistency record (docs/i18n/README.md): the git blob hash of each
# side as of the last confirmed-consistent state. Both languages carry equal authority;
# after editing either side, bring the other along and re-record with:
# pnpm run verify-translation-pairing --write .agents/notes/implemented/feature/2026-07-30-tui-details-command.md
2026-07-30-tui-details-command.md: f17c168cb87d546ca158eddef7dd96fb0ab8be2d
2026-07-30-tui-details-command.zh.md: 48e9a8d3f18c51982b8678e39d9315ffe08b015f

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# Agent Note: /details command for transcript detail state
Status: implemented
English | [中文](2026-07-30-tui-details-command.zh.md)
## Problem
The TUI's transcript detail state — tool-card visibility (`collapsed`/`expanded`/`hidden`, per the [consolidated TUI presentation](../architecture/2026-07-28-consolidated-tui-presentation.md)) and reasoning-block display — was reachable only through the Ctrl+O cycle and the Ctrl+R toggle. A user who wants a specific mode must cycle through the others, cannot set both dimensions in one action, and has no way to query the current state; a terminal that swallows those control keys has no fallback at all.
## Decision
`dsh-tui` registers `/details` beside its other agent-scoped commands. Bare `/details` reports the current state in one notice. Arguments name target states directly: `collapsed|expanded|hidden` jumps tool cards to that phase, `reasoning on|off` sets reasoning display, bare `reasoning` toggles it, and directives combine in one invocation. An unknown token returns a command error carrying the usage line. The command mutates the same closure state as the shortcuts, refactored so the cycle and toggle are thin wrappers over `setToolsVisibility`/`setReasoning`; the shortcuts and their notices are unchanged.
A combined invocation applies reasoning before visibility because `setReasoning` rebuilds the transcript from session events, which drops non-durable notice components; applying it last would erase the just-appended visibility notice.
The reasoning rebuild exposed a replay defect that this change fixes in `renderEvent`: the live path cleared a settled `StreamingAssistantComponent` before a later `assistant/message` of the same step (so the second message got a fresh component), but `rebuildTranscript` replay reused the settled component and `settle()` overwrote its content, silently dropping the earlier message's text. The settled check now lives in `renderEvent`'s `assistant/message` case — one home for both paths — and the previously wrong `untrusted-controls` snapshot (an empty `Assistant` header where reasoning and text had been dropped) was re-recorded with the content present.
## Alternatives considered
**Cycle on bare `/details`, mirroring Ctrl+O.** Rejected: the command's value over the shortcut is naming an absolute state; a cycling command is the shortcut with more keystrokes, and bare invocation is more useful as a state report.
**Separate `/tools` and `/reasoning` commands.** Rejected: both dimensions are one presentation concern ("how much detail does the transcript show"), and a single command keeps the registry and `/help` list small while allowing one combined invocation.
**Config-key defaults per mode.** Out of scope: `showReasoning` already exists as config; the command is runtime state on top of it, matching the shortcuts.
## Consequences
- A user can jump to any detail mode, set both dimensions at once, and query the state — including on terminals that intercept Ctrl+O/Ctrl+R.
- The parser accepts order-free tokens, so `/details reasoning expanded` toggles reasoning and expands cards; last directive wins per dimension. This leniency is deliberate and documented in the README.
- Transcript rebuilds no longer lose assistant messages when a step carries more than one `assistant/message` event; the `details-command` snapshot pins the command surface and the fixed replay together.

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# Agent Note: 用于 transcript 细节状态的 /details 命令
Status: implemented
[English](2026-07-30-tui-details-command.md) | 中文
## Problem
TUI 的 transcript文本记录细节状态——工具卡片可见性`collapsed`/`expanded`/`hidden`,见[整合的 TUI 展示](../architecture/2026-07-28-consolidated-tui-presentation.md))与 reasoning 块显示——过去只能通过 Ctrl+O 循环和 Ctrl+R 切换来触达。想要某个特定模式的用户必须循环经过其他模式,无法一次操作同时设置两个维度,也无法查询当前状态;吞掉这些控制键的终端更是完全没有替代途径。
## Decision
`dsh-tui` 在其他 agent 作用域命令旁注册 `/details`。裸 `/details` 用一条通知报告当前状态。参数直接命名目标状态:`collapsed|expanded|hidden` 让工具卡片跳到该阶段,`reasoning on|off` 设置 reasoning 显示,裸 `reasoning` 切换它,且指令可在一次调用中组合。未知 token 返回携带用法行的命令错误。命令改动的是与快捷键相同的闭包状态,重构后循环与切换成为 `setToolsVisibility`/`setReasoning` 之上的薄封装;快捷键及其通知保持不变。
组合调用先应用 reasoning 再应用可见性,因为 `setReasoning` 会从会话事件重建 transcript而重建会丢弃非持久的通知组件若最后才应用它会抹掉刚追加的可见性通知。
reasoning 重建暴露了一个重放缺陷,本变更在 `renderEvent` 中修复:实时路径会在同一步骤的后续 `assistant/message` 之前清除已结算的 `StreamingAssistantComponent`(因此第二条消息获得新组件),但 `rebuildTranscript` 重放复用了已结算组件,`settle()` 覆盖其内容,静默丢掉了前一条消息的文本。已结算检查现在位于 `renderEvent``assistant/message` 分支——两条路径共用一个归属地——此前错误的 `untrusted-controls` 快照reasoning 与文本被丢弃后只剩空 `Assistant` 标题)已重录为包含内容的版本。
## Alternatives considered
**裸 `/details` 像 Ctrl+O 一样循环。** 否决:命令相对快捷键的价值在于命名绝对状态;循环命令只是按键更多的快捷键,裸调用作为状态报告更有用。
**拆分 `/tools` 与 `/reasoning` 两个命令。** 否决两个维度同属一个展示关注点“transcript 显示多少细节”),单一命令让注册表与 `/help` 列表更小,同时允许一次组合调用。
**按模式提供配置键默认值。** 超出范围:`showReasoning` 已作为配置存在;命令是其上的运行时状态,与快捷键一致。
## Consequences
- 用户可以跳到任意细节模式、一次设置两个维度并查询状态——包括在拦截 Ctrl+O/Ctrl+R 的终端上。
- 解析器接受无序 token因此 `/details reasoning expanded` 会切换 reasoning 并展开卡片;每个维度以最后一个指令为准。这一宽松是刻意的,并记录在 README 中。
- 当一个步骤携带多条 `assistant/message` 事件时transcript 重建不再丢失 assistant 消息;`details-command` 快照同时固定命令表面与修复后的重放。