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[Root Cause] dsh-lane (auto-maintained, do not close manually) | [根因] dsh-lane（自动维护，勿手动关闭） #6399
Closed as not planned
Description
同一根本原因（dsh-lane）的 open issue 汇聚，由根因归类板自动维护（10min 刷新，勿手编）。
本批 issue
- 镜像 [feat][dsh] Long sessions have no convergence path: compaction gated off on both sides, incremental lane full-resends on OpenAI wire | 长会话没有收敛通道：compaction 双向封锁 + 增量车道全量重发 #5796（GitHub [feat][dsh] Long sessions have no convergence path: compaction gated off on both sides, incremental lane full-resends on OpenAI wire | 长会话没有收敛通道：compaction 双向封锁 + 增量车道全量重发 #5796） — [feat][dsh] Long sessions have no conve…
根因: dsh compaction is gated off on BOTH sides (profile compaction/compaction-basic/… - 镜像 [PR] test: reproduce legacy folded tool coverage loss after upgrade #5836（GitHub decision request: pinned callers stranded on drifted proxy port after orphan reap — #5449 part 2 #5834） — decision request: pinned callers strand…
根因: decision request: dsh plugin lane bakes the proxy origin into model-channel URL… - 镜像 Fold-adjacent misses can be classified as unexplained seams when geometry exceeds the served context #6261（GitHub [Bug][DSH/Codex] Full system prompt appended each step is concatenated into instructions; once total exceeds 1,048,576 c | [Bug][DSH/Codex] 每步追加的完整 system prompt 被拼进 instructions 超 1,048,576 字符后整会话 400（含精确复算） #6258） — [Bug][DSH/Codex] Full system prompt app…
根因: DSH Desktop profile, bili 0.1.213, openai-codex lane (gpt-6.1-terra): DSH appen… - 镜像 [PR] EN | acp_status: stop recommending BLOCKED sentinel range endpoints (#6168) #6305（GitHub dsh plugin: second no-tools request lane in the same session invalidates all fold blocks;
compressthen resolves against that lane and fails withcannot-anchor#6303） — dsh plugin: second no-tools request lan…
根因: with the dsh plugin, dsh sends two different request shapes under ONE bili sess… - 镜像 [Bug][dsh] A one-off request with no system prompt and no tools, when attached under the main session ID, goes through t | [Bug][dsh] 没有 system、没有工具的一次性请求挂在主会话 id 下会走主管线：被注入 ACP 标签、占掉 ref、它的用量被记成主会话的上下文大小 #6310（GitHub [Bug][dsh] A one-off request with no system prompt and no tools, when attached under the main session ID, goes through t | [Bug][dsh] 没有 system、没有工具的一次性请求挂在主会话 id 下会走主管线：被注入 ACP 标签、占掉 ref、它的用量被记成主会话的上下文大小 #6310） — [Bug][dsh] A one-off request with no sy…
根因: on the dsh lane every one-shot shape is kept off the main pipeline (title dsh 0.2.1 Alpha.2更新了检查适配情况 #2503…
任务
对本批 issue 做一个根本性修复 PR：
- PR 描述里用
Fixes #...逐个列出上面每一个 GitHub issue 号（没有 GitHub 号的写镜像号） - 若某个 issue 已有自己的 PR 且方向一致，cherry-pick 其 commit 并保留原作者署名（
-x）；由你判断是否值得 - 标签按本 PR 的 diff 独立判断（类别 + 优先级），不要抄任何来源 issue
- 修完后回帖本线程：改了什么、为什么一次修了整批
Activity
[-][根因] dsh-lane（自动维护，勿手动关闭）[/-][+][Root Cause] dsh-lane (auto-maintained, do not close manually) | [根因] dsh-lane（自动维护，勿手动关闭）[/+]ranxianglei commentedon Nov 12, 2026
[bot] 🏷 进度汇报（刚才卡住被重启，先同步状态再继续）
已完成的分析（5 个源 issue 全部读完 + 代码定位）：
role:"developer"，openaiSystemTextForPersona（src/session-id.ts:294）只读role:"system"→ persona gate 恒 false → 侧车道骑 raw key 冲掉主车道 fold 状态isDshSingleShotSidecar（src/server/side-request.ts:210 要求非空 system）→ 骑主管线拿 refs/usage 结算当前状态：
2026-11-12_dsh-lane-root-cause（基于 master 33104b1）compressthen resolves against that lane and fails withcannot-anchor#6303 的修改前（读函数时进程挂起）接下来的计划：
compressthen resolves against that lane and fails withcannot-anchor#6303（openaiSystemTextForPersona同时读role:"developer"）+ 回归测试isDshSingleShotSidecar在会话已有历史时放行无 system 一次性请求）+ 回归测试Fixes #6303 #6310 #6258，[feat][dsh] Long sessions have no convergence path: compaction gated off on both sides, incremental lane full-resends on OpenAI wire | 长会话没有收敛通道：compaction 双向封锁 + 增量车道全量重发 #5796/decision request: pinned callers stranded on drifted proxy port after orphan reap — #5449 part 2 #5834 在 PR 描述里如实标注为决策请求继续干活，有进展再同步。