[Root Cause] kernel-compression (auto-maintained, do not disable manually) | [根因] kernel-compression（自动维护，勿手动关闭） #6389

同一根本原因（kernel-compression）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 [Feature] fold toward autoFoldTargetTokens while the session is idle — folding only happens on the request path, so idle sessions never converge and active ones stall every ~4.5 min #2670（GitHub [Feature] fold toward autoFoldTargetTokens while the session is idle — folding only happens on the request path, so idle sessions never converge and active ones stall every ~4.5 min #2670） — [Feature] fold toward autoFoldTargetTok…
  根因: folding only ever runs on the request path (preflightCompressIfNeeded awaited i…
• 镜像 [PR] fix(storage): pre-hydration receipt no longer blocks the notice-store legacy→kv migration (#5761) #5768（GitHub Request two capabilities: compression block "decommissioning" and summary "external rewrite" | 请求两个能力：压缩块「退役」与摘要「外部重写」 #5766） — Request two capabilities: compression b…
  根因: feature request: no surface exists to retire a folded block (remove from reside…
• 镜像 [PR] fix(fastpath-v6): tunnel-origin requests without the identity channel are cohort exclusions, not faults (#5760) #5773（GitHub feat(design): preserve in-progress implementation state across folds (coding sessions lose just-written details → re-read + self-contradiction loops) #5771） — feat(design): preserve in-progress impl…
  根因: design request: folds discard just-written implementation details (incident: 10…
• 镜像 sessions.gc doesn't clean up thoroughly | sessions.gc清理不干净 #5778（GitHub T2 nudge repeatedly recommends block merges rejected by turn-integrity gate #5776） — T2 nudge repeatedly recommends block me…
  根因: pendingByTier in kernel/src/compress.ts treats every active tier-1/2 block as a…
• 镜像 [Bug][dsh] Proxy OOMs by self-hitting the 8 GiB heap in ~30-90 min: resident pool budget (512 MiB) is smaller than a single session, so every round thrashes cold-load/evict and allocates giant temporaries #5782（GitHub UNCOVERED HISTORY advertises a protected-boundary turn fragment that compress always rejects | [Bug] UNCOVERED HISTORY 报出的 run 是保护区边界的 turn 片段，compress 必然拒绝，且整批回滚把相邻的合法区间一起废掉 #5780） — UNCOVERED HISTORY advertises a protecte…
  根因: uncoveredHistoryRuns (src/uncovered.ts, the [Bug] compress reports 'no compressible ranges remain' while mid-history spans sit outside every block #4331 audit surface) never runs the…
• 镜像 Compression conflict banner (bili v0.1.212, node v24.19.0, win32-x64) #5786（GitHub kernel authorization request: export the projectUnit screening entry so UNCOVERED HISTORY runs can carry verdict-backed foldability tags #5784） — kernel authorization request: export th…
  根因: decision request (owner-gated kernel boundary): export projectUnit/buildProject…
• 镜像 Scheduled full test failed: c3dfbe6b | 定时全量测试失败: c3dfbe6b #5832（GitHub compress merges disjoint ranges into earlier coverage but retains only the last summary #5830） — compress merges disjoint ranges into ea…
  根因: one compress batch carried four disjoint ranges (m01508-m01533, m01539-m01627, …
• 镜像 提案：快照表式压缩底座（六段固定链，单一存储真源） #5874（GitHub [Bug] post-compress "not at its minimum" footer drives single-message compress retries (18/19 streaks; 83% of retried ranges are the model's own pending-reply notes) #5872） — [Bug] post-compress "not at its minimum…
  根因: postCompressTail receipt ends successful folds with 'Uncovered history remains.…
• 镜像 Billion-context documentation addendum: nudge is independent of window occupancy. | billion-context 文档补充：nudge 与窗口占用无关 #5893（GitHub Recent-zone carve strands signed thinking when its Read tool_use folds → thinking ... cannot be modified 400 (0.1.212, Claude Code) #5891） — Recent-zone carve strands signed thinki…
  根因: Claude Code adaptive thinking (signature-only thinking blocks): when compress f…
• 镜像 Client-side and cloud compaction leave folded history unreachable #6215（GitHub Client-side and cloud compaction leave folded history unreachable #6215） — Client-side and cloud compaction leave …
  根因: when a client compacts on its own (Codex cloud compaction context_management.co…
• 镜像 [Bug][blockOps] The receipts for acp_rewrite / acp_retire report success, but as long as the compress call that created | [Bug][blockOps] acp_rewrite / acp_retire 的回执说成功了，但只要创建这个块的 compress 调用还在历史里，下一次请求带的仍是旧摘要 #6311（GitHub [Bug][blockOps] The receipts for acp_rewrite / acp_retire report success, but as long as the compress call that created | [Bug][blockOps] acp_rewrite / acp_retire 的回执说成功了，但只要创建这个块的 compress 调用还在历史里，下一次请求带的仍是旧摘要 #6311） — [Bug][blockOps] The receipts for acp_re…
  根因: a block's summary reaches the model through two paths and only one is updated: …
• 镜像 OpenAI Routing: Requests where the upstream omits cache fields are misrecorded as "unmeasured" and excluded from attribu | OpenAI 路由:上游省略缓存字段的请求被误记为"未测量"并剔除出归因,命中率与归因面板差 12.6pp 无法解释 #6329（GitHub Kernel authorization request: Line-form compress treats summary body lines starting with a ref pair as the header line o | Kernel authorization request: 行形式的 compress 把以 ref 对开头的摘要正文行当成下一块的头行（范围照折但摘要被截短，或多折出一个范围） #6328） — Kernel authorization request: Line-form…
  根因: Kernel Boundary rule-1 authorization request: compress advertises only the stri…
• 镜像 [Bug][compress] A rejected or no-op compress also triggers a one-time ref/ledger alignment: nothing was folded, yet the | [Bug][compress] 被拒绝或 no-op 的 compress 也会触发一次性的 ref/账本对齐：什么都没折叠，下一个请求却改写了所有标签 #6330（GitHub Kernel authorization request: On first write, the visibility watermark for the time attribute is set below the stamped r | Kernel authorization request: 时间属性可见水位线首次写入时定在已盖戳引用之下（从 v0.1.213 更新后的第一个请求会把所有现有标签的 time= 去掉） #6327） — Kernel authorization request: On first …
  根因: Kernel Boundary rule-1 authorization request: v0.1.210-v0.1.213 had message tim…
• 镜像 security: decompress toFile writes to arbitrary paths — model-controlled write primitive, restrict vs document (owner decision) #6333（GitHub Kernel authorization request: Ledger alignment only raises the time-attribute visibility watermark when references have | Kernel authorization request: 账本对齐只在挪动了引用时才抬高时间属性可见水位线（什么都没挪的对齐也会在第一次折叠时去掉所有标签的 time=） #6332） — Kernel authorization request: Ledger al…
  根因: Kernel Boundary rule-1 authorization request: restampRefsToLedger (kernel/src/r…
• 镜像 security: tunnel anti-tunnel marker exception (#1073) omits x-bili-tunnel in exactly the DNS-rebinding topology #6334（GitHub [Bug][compress] A rejected or no-op compress also triggers a one-time ref/ledger alignment: nothing was folded, yet the | [Bug][compress] 被拒绝或 no-op 的 compress 也会触发一次性的 ref/账本对齐：什么都没折叠，下一个请求却改写了所有标签 #6330） — [Bug][compress] A rejected or no-op com…
  根因: # Cache hit collapses to 1–12% for a whole generation, then the very next request returns to 100% — repeated 15× in one day #5608-D (commit 2071e9f, PR [PR] fix(resume): inherit timestamp ledger so resumed sessions re-render provider-cached tag bytes #5609) moved the one-time ref/ledger alignment (#…

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