feat: add consolidation accounting for workspace memory promotion

P0 implementation with four waves:

Wave 1: Dedup with accounting
- Add dedupeLongTermEntriesWithAccounting()
- Classify exact duplicate, identity duplicate, topic duplicate

Wave 2: Normalization with accounting
- Add normalizeWorkspaceMemoryWithAccounting()
- Chain redaction → migration → enforceLongTermLimitsWithAccounting

Wave 3: Promotion accounting integration
- Update accountPendingPromotions() to use new accounting API
- Add supersededKeys to classification
- Distinguish promoted / absorbed / superseded / rejected

Wave 4: Integration tests
- End-to-end tests covering full pipeline

Bug fixes:
- Fix active vs superseded boundary (superseded entries no longer block promotion)
- Remove unused rejected_duplicate_lower_quality type
- Defer pending journal safety cap (TODO added)

Tests: 135 passing (up from 115)

tests/plugin.test.ts

@@ -9,7 +9,7 @@ import { parseWorkspaceMemoryCandidates } from "../src/extractors.ts";
 import type { OpenError } from "../src/types.ts";
 import { workspaceMemoryPath, workspacePendingJournalPath } from "../src/paths.ts";
 import { loadPendingJournal, savePendingJournal } from "../src/pending-journal.ts";
-import { updateWorkspaceMemory } from "../src/workspace-memory.ts";
+import { loadWorkspaceMemory, updateWorkspaceMemory } from "../src/workspace-memory.ts";
 
 // Mock client for root session (not a sub-agent)
 function mockRootClient() {
@@ -39,6 +39,23 @@ function mockClientWithLatestUser(text: string, messageID: string) {
   };
 }
 
+function mockClientWithCompactionSummary(summary: string) {
+  return {
+    session: {
+      get: async () => ({ data: { parentID: null } }),
+      messages: async () => ({
+        data: [
+          {
+            info: { role: "assistant", summary: true },
+            parts: [{ type: "text", text: summary }],
+          },
+        ],
+      }),
+      todo: async () => ({ data: [] }),
+    },
+  };
+}
+
 // Helper: create session state with pre-populated open error
 function createSessionWithError(sessionID: string, error: OpenError) {
   return {
@@ -562,6 +579,106 @@ test("session.compacted promotes pending memories to workspace memory and clears
   }
 });
 
+test("integration: explicit memory flows from user message through pending journal into workspace", async () => {
+  const tmpDir = await mkdtemp(join(tmpdir(), "memory-plugin-test-"));
+
+  try {
+    const plugin = await MemoryV2Plugin({
+      directory: tmpDir,
+      client: mockClientWithLatestUser("remember this: Prefer deterministic consolidation accounting.", "msg-explicit-flow"),
+    });
+
+    await (plugin as Record<string, Function>)["experimental.chat.system.transform"](
+      { sessionID: "explicit-flow-session", model: {} },
+      { system: ["base header"] },
+    );
+
+    assert.equal((await loadSessionState(tmpDir, "explicit-flow-session")).pendingMemories.length, 1);
+    assert.equal((await loadPendingJournal(tmpDir)).entries.length, 1);
+
+    await (plugin as Record<string, Function>)["event"]({
+      event: { type: "session.compacted", properties: { sessionID: "explicit-flow-session" } },
+    });
+
+    assert.equal((await loadSessionState(tmpDir, "explicit-flow-session")).pendingMemories.length, 0);
+    assert.equal((await loadPendingJournal(tmpDir)).entries.length, 0);
+
+    const output = { system: ["base header"] };
+    await (plugin as Record<string, Function>)["experimental.chat.system.transform"](
+      { sessionID: "explicit-flow-session", model: {} },
+      output,
+    );
+
+    assert.match(output.system.join("\n"), /Prefer deterministic consolidation accounting/);
+  } finally {
+    await rm(tmpDir, { recursive: true, force: true });
+  }
+});
+
+test("integration: compaction candidate flows through journal promotion and clears pending journal", async () => {
+  const tmpDir = await mkdtemp(join(tmpdir(), "memory-plugin-test-"));
+
+  try {
+    const summary = `
+## Goal
+Continue durable memory work.
+
+## Memory Candidates
+- [decision] Use accounting events to classify promoted absorbed superseded and rejected memories.
+`;
+    const plugin = await MemoryV2Plugin({
+      directory: tmpDir,
+      client: mockClientWithCompactionSummary(summary),
+    });
+
+    await (plugin as Record<string, Function>)["event"]({
+      event: { type: "session.compacted", properties: { sessionID: "compaction-flow-session" } },
+    });
+
+    assert.equal((await loadPendingJournal(tmpDir)).entries.length, 0,
+      "compaction candidate should be promoted and then cleared from pending journal");
+
+    const output = { system: ["base header"] };
+    await (plugin as Record<string, Function>)["experimental.chat.system.transform"](
+      { sessionID: "after-compaction-flow", model: {} },
+      output,
+    );
+
+    assert.match(output.system.join("\n"), /accounting events to classify promoted absorbed superseded and rejected memories/);
+  } finally {
+    await rm(tmpDir, { recursive: true, force: true });
+  }
+});
+
+test("integration: next session promotes prior explicit journal and leaves journal clean", async () => {
+  const tmpDir = await mkdtemp(join(tmpdir(), "memory-plugin-test-"));
+
+  try {
+    const firstPlugin = await MemoryV2Plugin({
+      directory: tmpDir,
+      client: mockClientWithLatestUser("remember this: Cross-session promotion keeps the journal clean.", "msg-cross-session"),
+    });
+    await (firstPlugin as Record<string, Function>)["experimental.chat.system.transform"](
+      { sessionID: "first-cross-session", model: {} },
+      { system: ["base header"] },
+    );
+
+    assert.equal((await loadPendingJournal(tmpDir)).entries.length, 1);
+
+    const secondPlugin = await MemoryV2Plugin({ directory: tmpDir, client: mockRootClient() });
+    const output = { system: ["base header"] };
+    await (secondPlugin as Record<string, Function>)["experimental.chat.system.transform"](
+      { sessionID: "second-cross-session", model: {} },
+      output,
+    );
+
+    assert.equal((await loadPendingJournal(tmpDir)).entries.length, 0);
+    assert.match(output.system.join("\n"), /Cross-session promotion keeps the journal clean/);
+  } finally {
+    await rm(tmpDir, { recursive: true, force: true });
+  }
+});
+
 test("same-session explicit memory does not mutate frozen system[1]", async () => {
   const tmpDir = await mkdtemp(join(tmpdir(), "memory-plugin-test-"));
 
@@ -779,6 +896,65 @@ test("session.compacted clears pending memory absorbed by existing workspace dup
   }
 });
 
+test("session.compacted promotes pending memory when exact existing entry is only superseded", async () => {
+  const tmpDir = await mkdtemp(join(tmpdir(), "memory-plugin-test-"));
+
+  try {
+    const now = new Date().toISOString();
+    await updateWorkspaceMemory(tmpDir, store => {
+      store.entries.push({
+        id: "mem_superseded_duplicate",
+        type: "decision",
+        text: "Revive superseded exact memories when remembered again.",
+        source: "explicit",
+        confidence: 1,
+        status: "superseded",
+        createdAt: now,
+        updatedAt: now,
+      });
+      return store;
+    });
+
+    await saveSessionState(tmpDir, {
+      version: 1,
+      sessionID: "superseded-boundary-session",
+      turn: 0,
+      updatedAt: now,
+      activeFiles: [],
+      openErrors: [],
+      recentDecisions: [],
+      pendingMemories: [{
+        id: "mem_pending_revive",
+        type: "decision",
+        text: "Revive superseded exact memories when remembered again.",
+        source: "explicit",
+        confidence: 1,
+        status: "active",
+        createdAt: now,
+        updatedAt: now,
+      }],
+    });
+
+    const plugin = await MemoryV2Plugin({ directory: tmpDir, client: mockRootClient() });
+    await (plugin as Record<string, Function>)["event"]({
+      event: { type: "session.compacted", properties: { sessionID: "superseded-boundary-session" } },
+    });
+
+    const state = await loadSessionState(tmpDir, "superseded-boundary-session");
+    assert.equal(state.pendingMemories.length, 0,
+      "revived pending memory should be cleared after successful promotion");
+
+    const workspace = await loadWorkspaceMemory(tmpDir);
+    const activeMatches = workspace.entries.filter(entry =>
+      entry.status === "active" && /Revive superseded exact memories/.test(entry.text)
+    );
+    assert.equal(activeMatches.length, 1,
+      "pending memory should become active even when only matching prior entry is superseded");
+  } finally {
+    await rm(tmpDir, { recursive: true, force: true });
+  }
+});
+
 test("session.compacted clears pending memory absorbed by existing workspace identity", async () => {
   const tmpDir = await mkdtemp(join(tmpdir(), "memory-plugin-test-"));
 
@@ -831,7 +1007,7 @@ test("session.compacted clears pending memory absorbed by existing workspace ide
   }
 });
 
-test("session.compacted keeps pending memory rejected by workspace entry cap", async () => {
+test("session.compacted clears compaction pending memory rejected by workspace entry cap", async () => {
   const tmpDir = await mkdtemp(join(tmpdir(), "memory-plugin-test-"));
 
   try {
@@ -878,15 +1054,69 @@ test("session.compacted keeps pending memory rejected by workspace entry cap", a
     });
 
     const state = await loadSessionState(tmpDir, "rejected-cap-session");
-    assert.equal(state.pendingMemories.length, 1,
-      "pending memory rejected by workspace cap should remain pending for retry");
-    assert.match(state.pendingMemories[0].text, /Low priority reference/);
+    assert.equal(state.pendingMemories.length, 0,
+      "compaction pending memory rejected by workspace cap should be terminal and clearable");
   } finally {
     await rm(tmpDir, { recursive: true, force: true });
   }
 });
 
-test("session.compacted keeps pending memories when all rejected by workspace cap", async () => {
+test("session.compacted keeps explicit pending memory rejected by workspace entry cap", async () => {
+  const tmpDir = await mkdtemp(join(tmpdir(), "memory-plugin-test-"));
+
+  try {
+    const now = new Date().toISOString();
+    await updateWorkspaceMemory(tmpDir, store => {
+      for (let i = 0; i < 28; i += 1) {
+        store.entries.push({
+          id: `mem_high_explicit_reject_${i}`,
+          type: "feedback",
+          text: `Pinned high priority feedback for explicit reject ${i}.`,
+          source: "explicit",
+          confidence: 1,
+          status: "active",
+          createdAt: now,
+          updatedAt: now,
+        });
+      }
+      return store;
+    });
+
+    await saveSessionState(tmpDir, {
+      version: 1,
+      sessionID: "explicit-rejected-cap-session",
+      turn: 0,
+      updatedAt: now,
+      activeFiles: [],
+      openErrors: [],
+      recentDecisions: [],
+      pendingMemories: [{
+        id: "mem_explicit_low_priority_reference",
+        type: "reference",
+        text: "Explicit reference should remain pending when capacity rejected.",
+        source: "explicit",
+        confidence: 0.1,
+        status: "active",
+        createdAt: now,
+        updatedAt: now,
+      }],
+    });
+
+    const plugin = await MemoryV2Plugin({ directory: tmpDir, client: mockRootClient() });
+    await (plugin as Record<string, Function>)["event"]({
+      event: { type: "session.compacted", properties: { sessionID: "explicit-rejected-cap-session" } },
+    });
+
+    const state = await loadSessionState(tmpDir, "explicit-rejected-cap-session");
+    assert.equal(state.pendingMemories.length, 1,
+      "explicit pending memory rejected by workspace cap should remain pending for retry");
+    assert.match(state.pendingMemories[0].text, /Explicit reference/);
+  } finally {
+    await rm(tmpDir, { recursive: true, force: true });
+  }
+});
+
+test("session.compacted clears compaction pending memories when all rejected by workspace cap", async () => {
   const tmpDir = await mkdtemp(join(tmpdir(), "memory-plugin-test-"));
 
   try {
@@ -946,19 +1176,18 @@ test("session.compacted keeps pending memories when all rejected by workspace ca
     });
 
     const state = await loadSessionState(tmpDir, "all-rejected-session");
-    assert.equal(state.pendingMemories.length, 1,
-      "session pending memory must remain when all pending memories are rejected");
+    assert.equal(state.pendingMemories.length, 0,
+      "compaction session pending memory should clear when rejected by capacity accounting");
 
     const pendingAfter = await loadPendingJournal(tmpDir);
-    assert.equal(pendingAfter.entries.length, 1,
-      "journal pending memories must not be cleared when accounting.clearableKeys is empty");
-    assert.match(pendingAfter.entries[0].text, /another session/);
+    assert.equal(pendingAfter.entries.length, 0,
+      "compaction journal pending memories should clear when rejected by capacity accounting");
   } finally {
     await rm(tmpDir, { recursive: true, force: true });
   }
 });
 
-test("session.compacted keeps rejected journal memories when no workspace entries survive", async () => {
+test("session.compacted clears stale rejected compaction journal memories", async () => {
   const tmpDir = await mkdtemp(join(tmpdir(), "memory-plugin-test-"));
 
   try {
@@ -983,9 +1212,8 @@ test("session.compacted keeps rejected journal memories when no workspace entrie
     });
 
     const pendingAfter = await loadPendingJournal(tmpDir);
-    assert.equal(pendingAfter.entries.length, 1,
-      "rejected journal memory must not be cleared when accounting.clearableKeys is empty");
-    assert.match(pendingAfter.entries[0].text, /Stale journal/);
+    assert.equal(pendingAfter.entries.length, 0,
+      "stale rejected compaction journal memory should be terminal and clearable");
   } finally {
     await rm(tmpDir, { recursive: true, force: true });
   }

tests/promotion-accounting.test.ts

@@ -3,6 +3,8 @@ import assert from "node:assert/strict";
 import type { LongTermMemoryEntry } from "../src/types.ts";
 import { accountPendingPromotions } from "../src/promotion-accounting.ts";
 import { memoryKey } from "../src/pending-journal.ts";
+import type { MemoryConsolidationEvent } from "../src/workspace-memory.ts";
+import { workspaceMemoryExactKey, workspaceMemoryIdentityKey } from "../src/workspace-memory.ts";
 
 function mem(
   id: string,
@@ -26,6 +28,18 @@ function mem(
   };
 }
 
+function event(
+  memory: LongTermMemoryEntry,
+  reason: MemoryConsolidationEvent["reason"],
+): MemoryConsolidationEvent {
+  return {
+    memoryKey: workspaceMemoryExactKey(memory),
+    identityKey: workspaceMemoryIdentityKey(memory),
+    memory,
+    reason,
+  };
+}
+
 test("accountPendingPromotions marks exact retained pending memory as promoted", () => {
   const pending = [mem("pending", "Use frozen rendered snapshots for cache stability.")];
   const before: LongTermMemoryEntry[] = [];
@@ -67,6 +81,24 @@ test("accountPendingPromotions marks same exact key present before promotion as
   assert.equal(result.rejectedKeys.size, 0);
 });
 
+test("accountPendingPromotions ignores superseded exact keys when detecting existing absorption", () => {
+  const superseded = mem("superseded", "Revive this memory when it is remembered again.", {
+    source: "explicit",
+    status: "superseded",
+  });
+  const pending = [mem("pending", "Revive this memory when it is remembered again.", {
+    source: "explicit",
+  })];
+  const before = [superseded];
+  const after = [superseded, pending[0]];
+
+  const result = accountPendingPromotions({ pending, before, after });
+
+  assert.deepEqual([...result.promotedKeys], [memoryKey(pending[0])]);
+  assert.equal(result.absorbedKeys.size, 0);
+  assert.deepEqual([...result.clearableKeys], [memoryKey(pending[0])]);
+});
+
 test("accountPendingPromotions marks same-topic decision represented after normalization as absorbed", () => {
   const existing = mem("existing", "Parser supports 2 candidate formats.", {
     type: "decision",
@@ -107,3 +139,91 @@ test("accountPendingPromotions keeps pending memory rejected when no equivalent
   assert.deepEqual([...result.rejectedKeys], [memoryKey(pending[0])]);
   assert.equal(result.clearableKeys.size, 0);
 });
+
+test("accountPendingPromotions clears accounting absorbed identity events", () => {
+  const pending = [mem("pending_identity", "This repo uses opencode-agenthub plugin system", {
+    type: "project",
+    source: "compaction",
+  })];
+
+  const result = accountPendingPromotions({
+    pending,
+    before: [],
+    after: [],
+    events: [event(pending[0], "absorbed_identity")],
+  });
+
+  assert.deepEqual([...result.absorbedKeys], [memoryKey(pending[0])]);
+  assert.deepEqual([...result.clearableKeys], [memoryKey(pending[0])]);
+  assert.equal(result.rejectedKeys.size, 0);
+});
+
+test("accountPendingPromotions separates accounting superseded events", () => {
+  const pending = [mem("pending_topic", "Parser supports 3 candidate formats.", {
+    type: "decision",
+    source: "compaction",
+  })];
+
+  const result = accountPendingPromotions({
+    pending,
+    before: [],
+    after: [],
+    events: [event(pending[0], "superseded_existing")],
+  });
+
+  assert.deepEqual([...result.supersededKeys], [memoryKey(pending[0])]);
+  assert.deepEqual([...result.clearableKeys], [memoryKey(pending[0])]);
+  assert.equal(result.absorbedKeys.size, 0);
+  assert.equal(result.rejectedKeys.size, 0);
+});
+
+test("accountPendingPromotions clears compaction capacity rejection from accounting", () => {
+  const pending = [mem("pending_capacity", "Weak compaction reference that should lose capacity review.", {
+    type: "reference",
+    source: "compaction",
+  })];
+
+  const result = accountPendingPromotions({
+    pending,
+    before: [],
+    after: [],
+    events: [event(pending[0], "rejected_capacity")],
+  });
+
+  assert.deepEqual([...result.rejectedKeys], [memoryKey(pending[0])]);
+  assert.deepEqual([...result.clearableKeys], [memoryKey(pending[0])]);
+});
+
+test("accountPendingPromotions keeps explicit capacity rejection pending", () => {
+  const pending = [mem("pending_explicit_capacity", "Explicit reference should retry if capacity rejected.", {
+    type: "reference",
+    source: "explicit",
+  })];
+
+  const result = accountPendingPromotions({
+    pending,
+    before: [],
+    after: [],
+    events: [event(pending[0], "rejected_capacity")],
+  });
+
+  assert.deepEqual([...result.rejectedKeys], [memoryKey(pending[0])]);
+  assert.equal(result.clearableKeys.size, 0);
+});
+
+test("accountPendingPromotions clears compaction stale rejection from accounting", () => {
+  const pending = [mem("pending_stale", "Stale compaction reference should be terminal.", {
+    type: "reference",
+    source: "compaction",
+  })];
+
+  const result = accountPendingPromotions({
+    pending,
+    before: [],
+    after: [],
+    events: [event(pending[0], "rejected_stale")],
+  });
+
+  assert.deepEqual([...result.rejectedKeys], [memoryKey(pending[0])]);
+  assert.deepEqual([...result.clearableKeys], [memoryKey(pending[0])]);
+});

tests/workspace-memory.test.ts

@@ -9,11 +9,16 @@ import { workspaceMemoryPath } from "../src/paths.ts";
 import {
   renderWorkspaceMemory,
   enforceLongTermLimits,
+  dedupeLongTermEntriesWithAccounting,
+  enforceLongTermLimitsWithAccounting,
+  normalizeWorkspaceMemoryWithAccounting,
+  workspaceMemoryExactKey,
   redactCredentials,
   isProjectSnapshotViolation,
   runMigrationP0Cleanup,
   loadWorkspaceMemory,
   saveWorkspaceMemory,
+  updateWorkspaceMemoryWithAccounting,
 } from "../src/workspace-memory.ts";
 
 function entry(id: string, text: string, type: LongTermMemoryEntry["type"] = "decision"): LongTermMemoryEntry {
@@ -243,6 +248,241 @@ test("enforceLongTermLimits respects maxEntries limit", () => {
   assert.ok(kept.length <= 28, `Should respect maxEntries. Got: ${kept.length}`);
 });
 
+test("dedupeLongTermEntriesWithAccounting reports exact duplicates as absorbed", () => {
+  const now = new Date().toISOString();
+  const lower: LongTermMemoryEntry = {
+    id: "lower",
+    type: "decision",
+    text: "OpenCode uses NPM CACHE for plugin loading",
+    source: "compaction",
+    confidence: 0.7,
+    status: "active",
+    createdAt: now,
+    updatedAt: now,
+  };
+  const higher: LongTermMemoryEntry = {
+    id: "higher",
+    type: "decision",
+    text: "opencode uses npm cache for plugin loading!!!",
+    source: "compaction",
+    confidence: 0.8,
+    status: "active",
+    createdAt: now,
+    updatedAt: now,
+  };
+
+  const result = dedupeLongTermEntriesWithAccounting([lower, higher]);
+
+  assert.equal(result.kept.length, 1);
+  assert.equal(result.kept[0].id, "higher");
+  assert.deepEqual(result.absorbed.map(event => event.reason), ["absorbed_exact"]);
+  assert.equal(result.absorbed[0].memory.id, "lower");
+});
+
+test("dedupeLongTermEntriesWithAccounting reports identity duplicates as absorbed", () => {
+  const older = agedEntry(
+    "older",
+    "This repo uses opencode-agenthub plugin system at /Users/sd_wo/work/opencode-working-memory/",
+    "project",
+    { daysAgo: 5 },
+  );
+  const newer = agedEntry(
+    "newer",
+    "此 repo 在開發時使用 opencode-agenthub 插件系統，目錄位於 /Users/sd_wo/work/opencode-working-memory/.opencode-agenthub/",
+    "project",
+    { daysAgo: 0 },
+  );
+
+  const result = dedupeLongTermEntriesWithAccounting([older, newer]);
+
+  assert.equal(result.kept.length, 1);
+  assert.equal(result.absorbed.length, 1);
+  assert.equal(result.absorbed[0].reason, "absorbed_identity");
+  assert.equal(result.absorbed[0].retainedId, result.kept[0].id);
+});
+
+test("dedupeLongTermEntriesWithAccounting reports topic duplicates as superseded", () => {
+  const older = agedEntry(
+    "older",
+    "Parser supports 3 formats: HTML comment, Markdown section, legacy XML",
+    "decision",
+    { daysAgo: 5 },
+  );
+  const newer = agedEntry(
+    "newer",
+    "Parser supports 4 formats: plain text label, Markdown section, legacy section name, legacy XML",
+    "decision",
+    { daysAgo: 0 },
+  );
+
+  const result = dedupeLongTermEntriesWithAccounting([older, newer]);
+
+  assert.equal(result.kept.length, 1);
+  assert.equal(result.kept[0].id, "newer");
+  assert.equal(result.superseded.length, 1);
+  assert.equal(result.superseded[0].reason, "superseded_existing");
+  assert.equal(result.superseded[0].supersededId, "older");
+  assert.equal(result.superseded[0].retainedId, "newer");
+});
+
+test("enforceLongTermLimitsWithAccounting reports capacity drops", () => {
+  const now = new Date().toISOString();
+  const entries = Array.from({ length: LONG_TERM_LIMITS.maxEntries + 2 }, (_, i) => ({
+    id: `mem_${i}`,
+    type: "reference" as const,
+    text: `Unique low priority reference ${i}`,
+    source: "compaction" as const,
+    confidence: i < LONG_TERM_LIMITS.maxEntries ? 0.8 : 0.1,
+    status: "active" as const,
+    createdAt: now,
+    updatedAt: now,
+  }));
+
+  const result = enforceLongTermLimitsWithAccounting(entries);
+
+  assert.equal(result.kept.length, LONG_TERM_LIMITS.maxEntries);
+  assert.equal(result.dropped.filter(event => event.reason === "rejected_capacity").length, 2);
+  assert.ok(result.dropped.every(event => event.memory.source === "compaction"));
+});
+
+test("workspaceMemoryExactKey uses pending-compatible canonical semantics", () => {
+  const now = new Date().toISOString();
+  const entry: LongTermMemoryEntry = {
+    id: "key_alignment",
+    type: "decision",
+    text: "OpenCode uses NPM CACHE for plugin loading!!!",
+    source: "compaction",
+    confidence: 0.75,
+    status: "active",
+    createdAt: now,
+    updatedAt: now,
+  };
+
+  assert.equal(workspaceMemoryExactKey(entry), "decision:opencode uses npm cache for plugin loading");
+});
+
+test("normalizeWorkspaceMemoryWithAccounting redacts credentials before accounting", async () => {
+  const root = "/repo";
+  const now = new Date().toISOString();
+  const store: WorkspaceMemoryStore = {
+    version: 1,
+    workspace: { root, key: "abc" },
+    limits: { maxRenderedChars: LONG_TERM_LIMITS.maxRenderedChars, maxEntries: LONG_TERM_LIMITS.maxEntries },
+    migrations: ["2026-04-26-p0-cleanup"],
+    entries: [{
+      id: "cred",
+      type: "reference",
+      text: "Admin PIN 是 456123",
+      rationale: "password: sushi",
+      source: "explicit",
+      confidence: 1,
+      status: "active",
+      createdAt: now,
+      updatedAt: now,
+    }],
+    updatedAt: now,
+  };
+
+  const result = await normalizeWorkspaceMemoryWithAccounting(root, store);
+
+  assert.equal(result.kept.length, 1);
+  assert.equal(result.kept[0].text, "Admin PIN 是 [REDACTED]");
+  assert.equal(result.kept[0].rationale, "password: [REDACTED]");
+  assert.equal(result.store.entries[0].text, "Admin PIN 是 [REDACTED]");
+});
+
+test("normalizeWorkspaceMemoryWithAccounting reports overflow capacity drops", async () => {
+  const root = "/repo";
+  const now = new Date().toISOString();
+  const store: WorkspaceMemoryStore = {
+    version: 1,
+    workspace: { root, key: "abc" },
+    limits: { maxRenderedChars: LONG_TERM_LIMITS.maxRenderedChars, maxEntries: LONG_TERM_LIMITS.maxEntries },
+    migrations: ["2026-04-26-p0-cleanup"],
+    entries: Array.from({ length: LONG_TERM_LIMITS.maxEntries + 1 }, (_, i) => ({
+      id: `overflow_${i}`,
+      type: "reference" as const,
+      text: `Overflow reference ${i}`,
+      source: "compaction" as const,
+      confidence: i < LONG_TERM_LIMITS.maxEntries ? 0.8 : 0.1,
+      status: "active" as const,
+      createdAt: now,
+      updatedAt: now,
+    })),
+    updatedAt: now,
+  };
+
+  const result = await normalizeWorkspaceMemoryWithAccounting(root, store);
+
+  assert.equal(result.kept.length, LONG_TERM_LIMITS.maxEntries);
+  assert.equal(result.store.entries.filter(entry => entry.status === "active").length, LONG_TERM_LIMITS.maxEntries);
+  assert.equal(result.dropped.filter(event => event.reason === "rejected_capacity").length, 1);
+});
+
+test("normalizeWorkspaceMemoryWithAccounting reports stale entry removal", async () => {
+  const root = "/repo";
+  const now = new Date().toISOString();
+  const stale = agedEntry(
+    "stale_normalize",
+    "Old compaction decision should be removed by normalization accounting",
+    "decision",
+    { daysAgo: 90, staleAfterDays: 1 },
+  );
+  const store: WorkspaceMemoryStore = {
+    version: 1,
+    workspace: { root, key: "abc" },
+    limits: { maxRenderedChars: LONG_TERM_LIMITS.maxRenderedChars, maxEntries: LONG_TERM_LIMITS.maxEntries },
+    migrations: ["2026-04-26-p0-cleanup"],
+    entries: [stale],
+    updatedAt: now,
+  };
+
+  const result = await normalizeWorkspaceMemoryWithAccounting(root, store);
+
+  assert.equal(result.kept.length, 0);
+  assert.equal(result.store.entries.length, 0);
+  assert.deepEqual(result.dropped.map(event => event.reason), ["rejected_stale"]);
+  assert.equal(result.dropped[0].memory.id, "stale_normalize");
+});
+
+test("updateWorkspaceMemoryWithAccounting emits accounting events for persisted updates", async () => {
+  const sandbox = await mkdtemp(join(tmpdir(), "wm-accounting-update-"));
+  const dataHome = join(sandbox, "xdg-data-home");
+  const root = join(sandbox, "workspace");
+  const previousXdgDataHome = process.env.XDG_DATA_HOME;
+  process.env.XDG_DATA_HOME = dataHome;
+
+  try {
+    const now = new Date().toISOString();
+    const result = await updateWorkspaceMemoryWithAccounting(root, store => {
+      store.entries.push(...Array.from({ length: LONG_TERM_LIMITS.maxEntries + 1 }, (_, i) => ({
+        id: `persisted_${i}`,
+        type: "reference" as const,
+        text: `Persisted accounting reference ${i}`,
+        source: "compaction" as const,
+        confidence: i < LONG_TERM_LIMITS.maxEntries ? 0.8 : 0.1,
+        status: "active" as const,
+        createdAt: now,
+        updatedAt: now,
+      })));
+      return store;
+    });
+
+    assert.equal(result.store.entries.filter(entry => entry.status === "active").length, LONG_TERM_LIMITS.maxEntries);
+    assert.equal(result.events.filter(event => event.reason === "rejected_capacity").length, 1);
+
+    const persisted = await loadWorkspaceMemory(root);
+    assert.equal(persisted.entries.filter(entry => entry.status === "active").length, LONG_TERM_LIMITS.maxEntries);
+  } finally {
+    if (previousXdgDataHome === undefined) {
+      delete process.env.XDG_DATA_HOME;
+    } else {
+      process.env.XDG_DATA_HOME = previousXdgDataHome;
+    }
+    await rm(sandbox, { recursive: true, force: true });
+  }
+});
+
 // ============================================
 // P0d: identity-key dedup, supersession, staleness
 // ============================================