fix(compact): address manual compaction review

packages/client/runtime/README.i18n.yaml

@@ -2,5 +2,5 @@
 # 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 packages/client/runtime/README.md
-README.md: fbb979ad410e520e01220519b57dd428bbda14f1
-README.zh.md: 29e3f0ef46e4b016679cf17dc58d8fe1a67fca6c
+README.md: 2d0e3228931f9a5dd467c996e69d1ea6a81352cc
+README.zh.md: 07c0ac90e82d11c71581f96b2fab64cf686fdd52

packages/client/runtime/README.md

@@ -28,7 +28,7 @@ Because the projection is log-ordered, the node array is seq-monotonic by constr
 
 ## Request inspection
 
-`SessionHistoryInspection.requests` is one chronological, purpose-discriminated provider-request stream. Assistant requests always carry their numeric `turn` and `step`; compaction requests carry `step: 0` and a `turn` owner that may be `null`. That null owner means a manual compaction ran standalone between turns, not that it belongs to either adjacent turn.
+`SessionHistoryInspection.requests` is one chronological, purpose-discriminated provider-request stream. Assistant requests always carry their numeric `turn` and `step`; compaction requests carry `step: 0` and a `turn` owner that may be `null`. That null owner means a manual compaction ran standalone between turns, not that it belongs to either adjacent turn. A `session/end-seed` boundary closes an unmatched compaction request as an error at the boundary time with `Compaction was interrupted before completion.`; a later start projects as an independent request instead of overwriting the orphan.
 
 ## Code Mode sub-dispatch index
 

packages/client/runtime/README.zh.md

@@ -28,7 +28,7 @@ SlotsService 分别为 renderer 提供 `useSessions` 与 `useWorkspaces` 的裸
 
 ## 请求检查
 
-`SessionHistoryInspection.requests` 是一条按时间顺序排列、以用途为判别字段的提供方请求流。助手请求始终携带数值型 `turn` 与 `step`；压缩请求携带 `step: 0`，其 `turn` 所有者可以是 `null`。这个 null 所有者表示手动压缩独立运行在两个轮次之间，并不表示它属于任一相邻轮次。
+`SessionHistoryInspection.requests` 是一条按时间顺序排列、以用途为判别字段的提供方请求流。助手请求始终携带数值型 `turn` 与 `step`；压缩请求携带 `step: 0`，其 `turn` 所有者可以是 `null`。这个 null 所有者表示手动压缩独立运行在两个轮次之间，并不表示它属于任一相邻轮次。`session/end-seed` 边界会在边界时刻将未匹配的压缩请求以错误状态结束，错误固定为 `Compaction was interrupted before completion.`；后续 start 会投影为独立请求，而不会覆盖这项遗留的未匹配请求。
 
 ## Code Mode 子调用索引
 

packages/client/runtime/src/client/sessions/request-inspection.ts

@@ -367,6 +367,15 @@ function deriveRequests(events: readonly SessionEvent[]): readonly RequestView[]
     }
 
     const type = sourceEvent.type as string
+    if (type === 'session/end-seed' && activeCompaction !== undefined) {
+      updateCompaction(activeCompaction, {
+        completedAt: sourceEvent.time,
+        status: 'error',
+        error: 'Compaction was interrupted before completion.',
+      })
+      activeCompaction = undefined
+      continue
+    }
     if (type === 'compact/start') {
       const event = sourceEvent as unknown as CompactionStartEvent
       activeCompaction = requests.length

packages/client/runtime/tests/request-inspection.spec.ts

@@ -116,6 +116,37 @@ describe('inspectRequests', () => {
     }
   })
 
+  it('interrupts an orphaned compaction at end-seed before projecting a new attempt', () => {
+    const snapshot = inspectRequests(entriesOf([
+      at(0, 'compact/start', { turn: null }),
+      at(1, 'session/end-seed', {}),
+      at(2, 'compact/start', { turn: null }),
+      at(3, 'compact/summary', {
+        summary: [{ type: 'text', text: 'replacement summary' }],
+        provider: 'fake',
+        model: 'compact-model',
+      }),
+      at(4, 'compact/end', { turn: null }),
+    ]))
+
+    expect(snapshot.requests).toMatchObject([
+      {
+        purpose: 'compaction',
+        startSeq: 0,
+        status: 'error',
+        completedAt: 1_700_000_000_001,
+        error: 'Compaction was interrupted before completion.',
+      },
+      {
+        purpose: 'compaction',
+        startSeq: 2,
+        status: 'complete',
+        completedAt: 1_700_000_000_004,
+        summary: [{ type: 'text', text: 'replacement summary' }],
+      },
+    ])
+  })
+
   it('captures schemas for nested tool dispatches from the active request header', () => {
     const snapshot = inspectRequests(entriesOf([
       at(0, 'request/header', {