diff --git a/README.md b/README.md
index 87f935e..c6e6f07 100644
--- a/README.md
+++ b/README.md
@@ -133,6 +133,31 @@ Persists across sessions within the same workspace. Automatically extracted duri
 - `compaction` - Extracted during compaction (confidence: 0.75)
 - `manual` - Added programmatically (confidence: varies)
 
+### Explicit Memory Triggers
+
+Workspace memory is automatic, but you can also explicitly ask the agent to remember durable facts for future sessions.
+
+Use memory triggers for preferences, decisions, project conventions, and stable references — not temporary progress updates or secrets.
+
+| Language | Example trigger phrases |
+|----------|--------------------------|
+| English | `remember this`, `save to memory`, `commit to memory`, `from now on`, `my preference` |
+| Chinese | `记住`, `記住`, `记得`, `記得`, `请帮我记住`, `幫我記住` |
+| Japanese | `覚えて`, `覚えておいて`, `忘れないで`, `メモして` |
+| Korean | `기억해`, `기억해줘`, `잊지 마`, `메모해줘` |
+
+Negative requests are respected too, such as "don't remember this", `不要記住`, `覚えないで`, or `기억하지 마`.
+
+**Good examples:**
+- "Remember this: we prefer Vitest for new unit tests."
+- "覚えておいて: API clients should use the shared retry helper."
+- "기억해줘: this project uses pnpm, not npm."
+
+**Avoid:**
+- "Remember my password is hunter2." — credentials are redacted.
+- "Remember Sprint 3 is 40% done." — temporary progress snapshots are filtered.
+- "Remember the last command output." — session-specific details usually are not durable.
+
 ### Hot Session State (Short-term)
 
 Automatically tracks current session context:
diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index f800396..e0004ac 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,5 +1,30 @@
 # Release Notes
 
+## 1.2.2 (2026-04-27)
+
+### Safer Multilingual Memory Capture
+
+This release strengthens explicit memory handling across languages while keeping sensitive credentials out of stored workspace memory.
+
+### Key Features
+
+- **Always-on credential redaction**: Credentials are redacted both when memory is loaded and when it is saved
+- **Multilingual memory triggers**: Added Japanese and Korean explicit-memory phrases, plus expanded Chinese coverage
+- **Expanded snapshot filtering**: Rejects Wave/Sprint/Milestone/Task progress snapshots that should not become durable memory
+- **Higher memory quality bar**: Extraction now focuses on durable facts that will change future behavior
+
+### Fixed
+
+- **Credential leakage risk**: Password/PIN-style values are now redacted with delimiter-preserving patterns, including multilingual labels such as `パスワード`, `비밀번호`, `contraseña`, `mot de passe`, and `Passwort`.
+- **Missing non-English explicit memory requests**: Japanese (`覚えて`, `メモして`), Korean (`기억해`, `메모해줘`), and additional Chinese triggers are now recognized.
+- **Progress snapshots polluting memory**: Wave/Sprint/Milestone/Task status updates are filtered from long-term memory unless they contain durable facts.
+
+### Migration
+
+- Runs one-time cleanup for legacy snapshot entries: `2026-04-26-p0-cleanup`
+
+---
+
 ## 1.2.1 (2026-04-26)
 
 ### Compaction Memory Quality — Four-Layer Defense
diff --git a/docs/superpowers/plans/2026-04-26-workspace-memory-cleanup-migration.md b/docs/superpowers/plans/2026-04-26-workspace-memory-cleanup-migration.md
new file mode 100644
index 0000000..4be4717
--- /dev/null
+++ b/docs/superpowers/plans/2026-04-26-workspace-memory-cleanup-migration.md
@@ -0,0 +1,702 @@
+# Workspace Memory Cleanup Migration Plan (v2)
+
+## Status: APPROVED (v3)
+
+## Problem Statement
+
+Audit of recent workspace memories found quality issues in pre-v1.2.1 stores:
+
+### Issue 1: Snapshot Violations (P0)
+
+| Workspace | Entry | Type |
+|-----------|-------|------|
+| opencode-record | `測試套件：1237 tests pass, 226 suites` | Test count |
+| opencode-record | `USB 同步：37 個文件（...）` | File count (Chinese) |
+| opencode-record | `pathology-playground...已完成 Phase 1-4` | Phase progress |
+| pathology-agent-reports | `Waves 1-5, 7 已完成，Wave 6 deferred` | Wave progress |
+
+**Root Cause**: These entries were created before P0c/P0d fix (08:02:32). Current code would reject them.
+
+**Risk**: Medium. Pollutes long-term memory, wastes tokens.
+
+### Issue 2: Sensitive Credentials (P0)
+
+| Workspace | Entry | Risk |
+|-----------|-------|------|
+| opencode-record | `Admin PIN 是 456123` | **High** - Raw credential |
+| Pre-cancer-atlas | `測試用戶名：shihlab，密碼：sushi` | **High** - Raw credential |
+
+**Root Cause**: No credential redaction in compaction extraction or storage normalization.
+
+**Risk**: High. Credentials sent to model in every compaction prompt.
+
+### Issue 3: Wave/Sprint Not Filtered (P0)
+
+| Pattern | Status |
+|---------|--------|
+| `Phase 1-4 已完成` | ✅ Filtered by P0c |
+| `Wave 1-5 已完成` | ❌ Not filtered |
+
+**Root Cause**: P0c filter only covers `Phase`, not `Wave/Sprint/Milestone/Task`.
+
+**Risk**: Medium. New snapshots still enter memory.
+
+### Issue 4: Duplicates (P1)
+
+| Workspace | Entry | Issue |
+|-----------|-------|-------|
+| Pre-cancer-atlas | `認證使用 Basic Auth...` x2 | Exact duplicate |
+| Pre-cancer-atlas | `IP 隱私...` x2 | Semantic duplicate |
+| Pre-cancer-atlas | `Cloud Run...` project + reference | Cross-type duplicate |
+
+**Root Cause**: `extractEntityKey()` only recognizes `opencode-agenthub`. Natural canonical dedup handles exact duplicates.
+
+**Risk**: Low. Wastes tokens but not dangerous.
+
+---
+
+## Architect Review Failures (v1, v2)
+
+### v1 Failures
+
+| Issue | Problem |
+|-------|---------|
+| Regex | `Waves` not matched, Chinese `\b` unreliable |
+| Superseded entries | Would be deleted by `enforceLongTermLimits()` |
+| Credential redaction | Was migration-gated, must be always-on |
+| Wave filter | Deferred to future, must be now |
+| Over-broad | `Upload limit is 10 files` would be flagged |
+| Rationale | Only redacted `text`, not `rationale` |
+
+### v2 Failures
+
+| Issue | Problem |
+|-------|---------|
+| File context | `upload` matches `Upload limit`, false positive |
+| Explicit check | Missing `source === "explicit"` check before marking |
+| Credential regex | `\S+` captures through Chinese comma tail |
+| Filter location | Don't filter in `getFrozenWorkspaceMemory()` |
+
+---
+
+## Proposed Solution (v3)
+
+### Architecture Principle
+
+```
+                    ┌─────────────────────────────────┐
+                    │ normalizeWorkspaceMemory()      │
+                    │                                 │
+                    │  1. ALWAYS redact credentials  │
+                    │     (not migration-gated)       │
+                    │                                 │
+                    │  2. Mark legacy snapshots as    │
+                    │     superseded (migration-gated)│
+                    │                                 │
+                    │  3. Preserve superseded entries │
+                    │     in storage, exclude from    │
+                    │     render                       │
+                    └─────────────────────────────────┘
+```
+
+### Key Design Decisions
+
+1. **Credential redaction is always-on** - runs on every normalize, independent of migration ID
+2. **Snapshot marking is migration-gated** - one-time cleanup for legacy entries
+3. **Superseded entries preserved in storage** - but excluded from render
+4. **Type restriction for snapshots** - only `project` type, avoid false positives
+5. **Wave/Sprint/Milestone filter added now** - not deferred
+
+---
+
+## Implementation
+
+### 1. Add Migration Tracking to Type
+
+```typescript
+// src/types.ts
+
+interface WorkspaceMemoryStore {
+  version: number;
+  workspace: { root: string; key: string };
+  limits: { maxRenderedChars: number; maxEntries: number };
+  entries: LongTermMemoryEntry[];
+  migrations?: string[];  // NEW: track applied migrations
+  updatedAt: string;
+}
+
+const MIGRATION_ID = "2026-04-26-p0-cleanup";
+```
+
+### 2. Snapshot Detection (Revised Regex)
+
+```typescript
+// src/workspace-memory.ts
+
+/**
+ * Detect snapshot violations in text.
+ * Only apply to 'project' type entries with source !== 'explicit'.
+ */
+function isProjectSnapshotViolation(text: string): boolean {
+  // Test/suite counts
+  if (/\d+\s+tests?\s+pass(?:ed)?/i.test(text)) return true;
+  if (/\d+\s+suites?\s+(?:pass|fail)/i.test(text)) return true;
+  
+  // File counts (Chinese/English) - require sync/completion context
+  // And must NOT be a limit/maximum statement
+  if (/\d+\s*(?:個|个)?\s*(?:files?|文件)/i.test(text)) {
+    const hasSnapshotContext = /同步|synced|uploaded|downloaded|completed|generated|created|modified|processed|完成/i.test(text);
+    const hasLimitContext = /limit|max|maximum|min|minimum|supports?|allowed|per\s+(?:batch|request|upload)/i.test(text);
+    if (hasSnapshotContext && !hasLimitContext) return true;
+  }
+  
+  // Phase/Wave/Sprint/Milestone progress
+  // English: Phase 1-4 completed, Waves 1-5 done
+  if (/(?:phases?|waves?|sprints?|milestones?|tasks?)\s*\d+(?:\s*[-–]\s*\d+)?/i.test(text)) {
+    if (/completed|done|finished|完成/i.test(text)) return true;
+  }
+  // Chinese: 已完成 Phase 1-4
+  if (/(?:已完成|完成).{0,30}(?:phases?|waves?|sprints?|milestones?|tasks?)/i.test(text)) return true;
+  
+  return false;
+}
+```
+
+### 3. Credential Redaction (Always-On)
+
+```typescript
+// src/workspace-memory.ts
+
+/**
+ * Bounded secret value pattern - stops at delimiters and Chinese punctuation.
+ * Avoids capturing through Chinese commas: 密碼：sushi，用於測試
+ */
+const SECRET_VALUE = String.raw`[^` + "`" + String.raw`'",，,\s]+`;
+
+/**
+ * Multilingual credential labels.
+ * These are used in both detection and redaction patterns.
+ */
+const PASSWORD_LABELS = /password|passwd|pwd|密碼|密码|パスワード|비밀번호|contraseña|mot de passe|passwort/i;
+const USERNAME_LABELS = /username|user name|用戶名|用户名|ユーザー名|사용자명|usuario|utilisateur|benutzer/i;
+
+/**
+ * Prefix patterns that capture label + delimiter together.
+ * This preserves the delimiter in output: 密碼：secret → 密碼：[REDACTED]
+ */
+const PASSWORD_PREFIX = String.raw`(${PASSWORD_LABELS.source}\s*(?:是|=|:|：)?\s*)`;
+const USERNAME_PREFIX = String.raw`(${USERNAME_LABELS.source}\s*(?:是|=|:|：)?\s*)`;
+
+/**
+ * Redact sensitive credentials from text.
+ * This runs on EVERY normalize, not just migration.
+ * Idempotent - [REDACTED] doesn't match patterns again.
+ * 
+ * Order matters:
+ * 1. PIN (standalone)
+ * 2. Username+password pairs (must run before standalone password)
+ * 3. Standalone password
+ */
+function redactCredentials(text: string): string {
+  let result = text;
+  
+  // 1. PIN patterns (language-neutral, supports 是, =, :, ：)
+  result = result.replace(
+    new RegExp(String.raw`\b(PIN|pin)\s*(?:是|=|:|：)?\s*[`'"]?(${SECRET_VALUE})`, 'gi'),
+    '$1 [REDACTED]'
+  );
+  
+  // 2. Username+Password pairs (multilingual)
+  // Must run BEFORE standalone password to match full pairs.
+  // 測試用戶名：xxx，密碼：yyy
+  // username: xxx, password: yyy
+  result = result.replace(
+    new RegExp(
+      String.raw`${USERNAME_PREFIX}[\`'"]?(${SECRET_VALUE})((?:，|,)\s*)${PASSWORD_PREFIX}[\`'"]?(${SECRET_VALUE})`,
+      'gi'
+    ),
+    '$1[REDACTED]$3$4[REDACTED]'
+  );
+  
+  // 3. Standalone password patterns (multilingual)
+  // Matches: password: secret, 密碼：secret, パスワード: secret, etc.
+  result = result.replace(
+    new RegExp(String.raw`${PASSWORD_PREFIX}[\`'"]?(${SECRET_VALUE})`, 'gi'),
+    '$1[REDACTED]'
+  );
+  
+  return result;
+}
+```
+
+### 4. Migration Function (One-Time)
+
+```typescript
+// src/workspace-memory.ts
+
+function runMigrationP0Cleanup(
+  store: WorkspaceMemoryStore,
+  nowIso: string
+): WorkspaceMemoryStore {
+  // Check if already run
+  if (store.migrations?.includes(MIGRATION_ID)) {
+    return store;
+  }
+  
+  const entries = store.entries.map(entry => {
+    // Skip explicit entries - user-added memories are preserved
+    if (entry.source === "explicit") {
+      return entry;
+    }
+    
+    // Skip non-project types for snapshot marking
+    // (Only project entries had snapshot pollution)
+    if (entry.type !== "project") {
+      return entry;
+    }
+    
+    // Mark legacy snapshot violations as superseded
+    if (isProjectSnapshotViolation(entry.text)) {
+      return {
+        ...entry,
+        status: "superseded" as const,
+        updatedAt: nowIso,
+      };
+    }
+    
+    return entry;
+  });
+  
+  return {
+    ...store,
+    entries,
+    migrations: [...(store.migrations || []), MIGRATION_ID],
+    updatedAt: nowIso,
+  };
+}
+```
+
+### 5. Normalize with Always-On Credential Redaction
+
+```typescript
+// src/workspace-memory.ts
+
+// Preserve existing normalization behavior
+async function normalizeWorkspaceMemory(
+  root: string,
+  store: WorkspaceMemoryStore,
+): Promise<WorkspaceMemoryStore> {
+  const nowIso = new Date().toISOString();
+  
+  // Start with existing store normalization
+  let result: WorkspaceMemoryStore = {
+    ...store,
+    workspace: { root, key: await workspaceKey(root) },
+    limits: {
+      maxRenderedChars: store.limits?.maxRenderedChars ?? LONG_TERM_LIMITS.maxRenderedChars,
+      maxEntries: store.limits?.maxEntries ?? LONG_TERM_LIMITS.maxEntries,
+    },
+    entries: Array.isArray(store.entries) ? store.entries : [],
+    updatedAt: nowIso,
+  };
+  
+  // ALWAYS-ON: Redact credentials in all entries
+  // This must run regardless of migration status
+  result.entries = result.entries.map(entry => {
+    const text = redactCredentials(entry.text);
+    const rationale = entry.rationale 
+      ? redactCredentials(entry.rationale) 
+      : undefined;
+    
+    if (text === entry.text && rationale === entry.rationale) {
+      return entry;
+    }
+    
+    return {
+      ...entry,
+      text,
+      rationale,
+      updatedAt: nowIso,
+    };
+  });
+  
+  // ONE-TIME: Mark legacy snapshots as superseded
+  result = runMigrationP0Cleanup(result, nowIso);
+  
+  // Remove superseded from active rendering
+  const activeEntries = result.entries.filter(e => e.status !== "superseded");
+  
+  // Apply dedup and limits to active entries only
+  const processed = enforceLongTermLimits(activeEntries);
+  
+  // Merge back: active entries + superseded entries (preserved in storage)
+  const superseded = result.entries.filter(e => e.status === "superseded");
+  
+  return {
+    ...result,
+    entries: [...processed, ...superseded],
+    updatedAt: nowIso,
+  };
+}
+```
+
+### 6. Extend P0c Snapshot Filter (Not Deferred)
+
+```typescript
+// src/extractors.ts
+
+// Add to isProjectSnapshotViolation() or equivalent filter
+
+// File counts - require snapshot context AND NOT limit context
+const FILE_COUNT_PATTERN = /\d+\s*(?:個|个)?\s*(?:files?|文件)/i;
+const FILE_SNAPSHOT_CONTEXT = /同步|synced|uploaded|downloaded|completed|generated|created|modified|processed|完成/i;
+const FILE_LIMIT_CONTEXT = /limit|max|maximum|min|minimum|supports?|allowed|per\s+(?:batch|request|upload)/i;
+
+if (FILE_COUNT_PATTERN.test(text)) {
+  if (FILE_SNAPSHOT_CONTEXT.test(text) && !FILE_LIMIT_CONTEXT.test(text)) {
+    return true; // snapshot violation
+  }
+}
+
+// Test/suite counts
+if (/\d+\s+tests?\s+pass(?:ed)?/i.test(text)) return true;
+if (/\d+\s+suites?\s+(?:pass|fail)/i.test(text)) return true;
+
+// Phase/Wave/Sprint/Milestone progress
+if (/(?:phases?|waves?|sprints?|milestones?|tasks?)\s*\d+(?:\s*[-–]\s*\d+)?/i.test(text)) {
+  if (/completed|done|finished|完成/i.test(text)) return true;
+}
+if (/(?:已完成|完成).{0,30}(?:phases?|waves?|sprints?|milestones?|tasks?)/i.test(text)) return true;
+```
+
+**Note**: Do NOT use bare `upload|download` as context. Use past-tense verbs or process states.
+
+---
+
+## Test Cases
+
+### Credential Redaction (Always-On)
+
+| Input | Expected Output |
+|-------|-----------------|
+| `Admin PIN 是 456123` | `Admin PIN 是 [REDACTED]` |
+| `Admin PIN = 456123` | `Admin PIN = [REDACTED]` |
+| `Admin PIN 456123` | `Admin PIN [REDACTED]` |
+| `密碼：sushi` | `密碼：[REDACTED]` |
+| `密码：sushi` | `密码：[REDACTED]` |
+| `password: abc-123!` | `password: [REDACTED]` |
+| `パスワード：secret` | `パスワード：[REDACTED]` |
+| `비밀번호: secret` | `비밀번호: [REDACTED]` |
+| `測試用戶名：shihlab，密碼：sushi` | `測試用戶名：[REDACTED]，密碼：[REDACTED]` |
+| `密碼：sushi，用於測試` | `密碼：[REDACTED]，用於測試` |
+| Credential in rationale | Redacted in both text and rationale |
+| Explicit entry with PIN | Redacted, preserved |
+| `[REDACTED]` in text | No change (idempotent) |
+
+### Snapshot Detection
+
+| Input | type | source | Is Violation? |
+|-------|------|--------|---------------|
+| `1237 tests pass, 226 suites` | project | compaction | ✅ Yes |
+| `USB 同步：37 個文件` | project | compaction | ✅ Yes |
+| `Phase 1-4 已完成` | project | compaction | ✅ Yes |
+| `Waves 1-5 已完成` | project | compaction | ✅ Yes |
+| `Upload limit is 10 files` | project | compaction | ❌ No (has "limit" context) |
+| `Project supports 5 test suites` | project | compaction | ❌ No (no pass/fail) |
+| `Phase 1-4 已完成` | project | explicit | ❌ No (explicit preserved) |
+| Snapshot text | feedback | compaction | ❌ No (only project type) |
+| Snapshot text | decision | compaction | ❌ No (only project type) |
+
+### Migration Behavior
+
+| Test | Description |
+|------|-------------|
+| Run once | Migration ID added |
+| Run twice | No duplicate ID, entries unchanged |
+| Non-project entry | Not marked superseded |
+| Project snapshot | Marked superseded |
+| Explicit project snapshot | Not marked (source check before type) |
+| Credential in snapshot | Redacted, then marked superseded |
+
+### Integration Tests
+
+| Test | Description |
+|------|-------------|
+| `saveWorkspaceMemory()` | Superseded entries preserved in JSON |
+| `updateWorkspaceMemory()` | Credential redaction runs on second normalize |
+| New entry with PIN | Redacted on save (always-on) |
+| `normalizeWorkspaceMemory()` | Preserves workspace root/key, limits, updatedAt |
+| Memory render | Superseded entries excluded via `enforceLongTermLimits()` |
+
+### Extractor Tests
+
+| Input | Expected |
+|-------|----------|
+| `Upload limit is 10 files` | NOT a snapshot violation (has "limit" context) |
+| `USB uploaded 37 files` | Snapshot violation (has "uploaded" process context) |
+| `Project supports 5 test suites` | NOT a snapshot violation (no pass/fail context) |
+| `1237 tests passed` | Snapshot violation (test count with pass) |
+
+---
+
+## Edge Cases
+
+| Case | Handling |
+|------|----------|
+| Entry is explicit + snapshot | Not marked (source check before type check) |
+| Entry has both snapshot + credential | Credential redacted, snapshot marked |
+| Entry is already superseded | Keep status, still redact credentials |
+| Migration runs twice | Skip if ID present |
+| Store has no migrations field | Create empty array |
+| `Upload limit is 10 files` | Not marked (has "limit" context) |
+| Password with punctuation `abc-123!` | Captured by bounded pattern |
+| Chinese comma after credential `密碼：sushi，用於測試` | Redact preserves `，用於測試` |
+| Simplified Chinese `密码` | Preserved as `密码：[REDACTED]` |
+
+---
+
+## Implementation Order
+
+1. Add `migrations` field to `WorkspaceMemoryStore` type
+2. Add snapshot patterns to `src/extractors.ts` (not deferred)
+3. Add `isProjectSnapshotViolation()` to `src/workspace-memory.ts`
+4. Add `redactCredentials()` to `src/workspace-memory.ts`
+5. Add `runMigrationP0Cleanup()` to `src/workspace-memory.ts`
+6. Update `normalizeWorkspaceMemory()` with always-on redaction + migration
+7. Do NOT add filtering to `getFrozenWorkspaceMemory()` - filtering happens in `enforceLongTermLimits()`
+8. Add test cases for all patterns
+
+---
+
+## What We Will NOT Do
+
+### Do NOT Add Project-Specific Entity Keys
+
+Cloud Run, Basic Auth, IP privacy — these are project-specific. Natural canonical dedup handles exact duplicates.
+
+### Do NOT Delete Superseded Entries
+
+Mark as `status: "superseded"`, preserve in storage, exclude from render.
+
+### Do NOT Gate Credential Redaction on Migration
+
+Credential redaction is always-on. Migration only marks legacy snapshots.
+
+---
+
+## Summary
+
+| Issue | Priority | Solution |
+|-------|----------|----------|
+| Sensitive credentials | P0 | Always-on redaction |
+| Snapshot violations | P0 | Migration-gated marking (project type only) |
+| Wave progress not filtered | P0 | Add to extractors.ts now |
+| Project-specific duplicates | N/A | Natural dedup |
+
+**Credential redaction runs on every normalize.**
+
+**Snapshot marking is one-time migration for legacy entries.**
+
+**Superseded entries preserved in storage, excluded from render.**
+
+**Wave/Sprint/Milestone filter added now, not deferred.**
+
+---
+
+## Multilingual Scope
+
+### Snapshot Detection: Chinese + English Only
+
+Do **not** add Japanese/Korean/Spanish/French/German snapshot regexes now.
+
+Reasons:
+- False positives silently suppress valid durable memories
+- Audit evidence only shows Chinese and English pollution
+- Words like "completed", "terminé", "abgeschlossen" can appear in durable process descriptions
+- Extraction is always-on, so every false positive becomes permanent blind spot
+
+Add languages only after seeing real polluted memories in those languages.
+
+### Credential Redaction: Add Multilingual Labels
+
+For credentials, false negatives leak secrets. Add high-signal multilingual labels now.
+
+**Password labels:**
+
+```typescript
+const PASSWORD_LABELS =
+  /password|passwd|pwd|密碼|密码|パスワード|비밀번호|contraseña|mot de passe|passwort/i;
+```
+
+**Username labels:**
+
+```typescript
+const USERNAME_LABELS =
+  /username|user name|用戶名|用户名|ユーザー名|사용자명|usuario|utilisateur|benutzer/i;
+```
+
+PIN remains language-neutral: `/\bPIN\b/i`
+
+### Memory Trigger Patterns: Add Chinese Expansion + Japanese + Korean
+
+#### Chinese Expansion
+
+Add common phrases:
+
+```typescript
+// Current: 记住/記住
+// Add: 记得/記得, 记下来/記下來
+
+/(?:^|\n)\s*(?:请|請)?(?:帮我|幫我)?(?:记住|記住|记得|記得|记下来|記下來)(?:这一点|這一點|这点|這點|这个|這個)?[:：,，]?\s*(.+)$/gim
+```
+
+#### Japanese Positive Triggers
+
+```typescript
+/(?:^|\n)\s*(?:覚えておいて|覚えて|忘れないで|メモして)[:：,，]?\s*(.+)$/gim
+```
+
+Note: `覚えておいて` must come before `覚えて` to prevent partial match in body.
+Note: `忘れないで` ("don't forget") is a positive memory request despite negative morphology.
+
+#### Japanese Negation
+
+```typescript
+/(?:覚えないで|記憶しないで|メモしないで)\s*$/u
+```
+
+#### Korean Positive Triggers
+
+```typescript
+/(?:^|\n)\s*(?:기억해줘|기억해|잊지 마|잊지마|메모해줘|메모해)[:：,，]?\s*(.+)$/gim
+```
+
+Note: `기억해줘` must come before `기억해`, `메모해줘` must come before `메모해` to prevent partial match in body.
+Note: `잊지 마` ("don't forget") is a positive memory request despite negative morphology.
+
+#### Korean Negation
+
+```typescript
+/(?:기억하지\s*마|기억하지마|메모하지\s*마|메모하지마)\s*$/u
+```
+
+#### Priority
+
+1. Chinese: `记得/記得`, `记下来/記下來` (small expansion)
+2. Japanese (full patterns + negation)
+3. Korean (full patterns + negation)
+4. Defer: Spanish/German/French (higher collision risk with normal text)
+
+### Tests Required
+
+**Credential redaction:**
+
+```text
+パスワード：secret → [REDACTED]
+비밀번호: secret → [REDACTED]
+contraseña: secret → [REDACTED]
+mot de passe: secret → [REDACTED]
+Passwort: secret → [REDACTED]
+```
+
+**Memory triggers (positive):**
+
+```text
+记得：这个项目使用 pnpm
+記下來：这个项目使用 pnpm
+覚えて: このプロジェクトは pnpm を使う
+覚えておいて: このプロジェクトは pnpm を使う
+忘れないで: このプロジェクトは pnpm を使う
+メモして: このプロジェクトは pnpm を使う
+기억해: 이 프로젝트는 pnpm을 사용한다
+기억해줘: 이 프로젝트는 pnpm을 사용한다
+잊지 마: 이 프로젝트는 pnpm을 사용한다
+메모해: 이 프로젝트는 pnpm을 사용한다
+메모해줘: 이 프로젝트는 pnpm을 사용한다
+```
+
+**Memory triggers (body extraction - must not include trigger suffix):**
+
+```text
+覚えておいて: このプロジェクトは pnpm を使う
+→ body is "このプロジェクトは pnpm を使う" (not "おいて: この...")
+
+기억해줘: 이 프로젝트는 pnpm을 사용한다
+→ body is "이 프로젝트는 pnpm을 사용한다" (not "줘: 이...")
+
+메모해줘: 이 프로젝트는 pnpm을 사용한다
+→ body is "이 프로젝트는 pnpm을 사용한다" (not "줘: 이...")
+```
+
+**Memory triggers (negation - should NOT trigger):**
+
+```text
+覚えないで 覚えて: temporary note only
+メモしないで メモして: temporary note only
+기억하지 마 기억해: temporary note only
+메모하지 마 메모해: temporary note only
+```
+
+---
+
+## Memory Quality Bar (Prompt Improvement)
+
+### Problem
+
+Current extraction accepts "facts that were mentioned" instead of "facts that will change future behavior."
+
+Examples of low-value trivia:
+- `Cloud Run revision: pre-cancer-atlas-website-00066-j8c` — transient deployment state
+- `UI 要統一風格：兩個表格都要 scrollable，約 20 rows` — local implementation detail
+- Paths observed from code/logs without stable contract
+
+### Solution: Prompt Quality Bar
+
+Add to compaction memory extraction prompt:
+
+```text
+Memory quality bar:
+Extract only durable facts that will change future behavior: user preferences, decisions with rationale, stable constraints, or hard-to-rediscover references.
+
+Do not extract trivia: transient IDs/revisions, task progress, test/file counts, bare status updates, local UI details, or facts easily rediscovered from the repo.
+
+When unsure, skip it. Fewer high-signal memories are better than many low-value ones.
+```
+
+### Example Pair (Optional)
+
+If model still stores junk, add one example:
+
+```text
+Bad: Cloud Run revision: xyz-00066
+Good: Revision xyz-00066 is the last known good deploy before the auth regression.
+```
+
+### What This Captures
+
+| Keep | Reject |
+|------|--------|
+| User preferences | Transient IDs/revisions |
+| Decisions with rationale | Task progress, test/file counts |
+| Stable constraints | Bare status updates |
+| Hard-to-rediscover references | Local UI details |
+| | Rediscoverable facts |
+
+### Why Prompt Instead of Code Filters
+
+- Context matters: "Cloud Run revision" might be useful if framed as "last known good before regression"
+- Avoid regex whack-a-mole for every trivia pattern
+- Model can judge wording and context
+- Easier to iterate on prompt than code
+
+### Code Filters (Stay Minimal)
+
+Keep only hard invariants:
+- Credentials (security)
+- Obvious snapshots (test counts, phase progress)
+
+Do NOT add new filters for deployment revisions, status updates, or UI trivia. Let prompt handle those.
+
+---
+
+## Summary
\ No newline at end of file
diff --git a/package.json b/package.json
index d6c8ef7..acec170 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "opencode-working-memory",
-  "version": "1.2.1",
+  "version": "1.2.2",
   "description": "Three-layer memory architecture for OpenCode with workspace memory and hot session state",
   "type": "module",
   "main": "index.ts",
diff --git a/src/extractors.ts b/src/extractors.ts
index b44a8f8..7296bf8 100644
--- a/src/extractors.ts
+++ b/src/extractors.ts
@@ -27,6 +27,16 @@ function isNegatedMemoryRequest(text: string, matchIndex: number): boolean {
     return true;
   }
 
+  // Japanese negative
+  if (/(?:覚えないで|記憶しないで|メモしないで)\s*$/u.test(prefix)) {
+    return true;
+  }
+
+  // Korean negative
+  if (/(?:기억하지\s*마|기억하지마|메모하지\s*마|메모하지마)\s*$/u.test(prefix)) {
+    return true;
+  }
+
   return false;
 }
 
@@ -35,7 +45,11 @@ export function extractExplicitMemories(text: string): LongTermMemoryEntry[] {
   // Pattern 必須在行首匹配，避免匹配到句子中間的非指令式用法
   const patterns = [
     // 中文：請/幫我 + 記住 + 可選後綴
-    /(?:^|\n)\s*(?:请|請)?(?:帮我|幫我)?(?:记住|記住)(?:这一点|這一點|这点|這點|这个|這個)?[:：,，]?\s*(.+)$/gim,
+    /(?:^|\n)\s*(?:请|請)?(?:帮我|幫我)?(?:记住|記住|记得|記得|记下来|記下來)(?:这一点|這一點|这点|這點|这个|這個)?[:：,，]?\s*(.+)$/gim,
+    // 日文（長詞優先）：覚えておいて must come before 覚えて
+    /(?:^|\n)\s*(?:覚えておいて|覚えて|忘れないで|メモして)[:：,，]?\s*(.+)$/gim,
+    // 韓文（長詞優先）：기억해줘/메모해줘 must come before 기억해/메모해
+    /(?:^|\n)\s*(?:기억해줘|기억해|잊지 마|잊지마|메모해줘|메모해)[:：,，]?\s*(.+)$/gim,
     // 英文：remember this/that - 必須在行首，避免 "to remember" 非指令匹配
     /(?:^|\n)\s*(?:please\s+)?remember\s+(?:this|that)?[:：,，]?\s*(.+)$/gim,
     // save/add to memory
@@ -179,6 +193,31 @@ export function classifyCommand(command: string): OpenError["category"] | null {
   return null;
 }
 
+function normalizeCandidateBody(body: string): { text: string; hadTrigger: boolean } | null {
+  const text = body.trim();
+  const triggerPatterns = [
+    /(?:请|請)?(?:帮我|幫我)?(?:记住|記住|记得|記得|记下来|記下來)(?:这一点|這一點|这点|這點|这个|這個)?[:：,，]?\s*(.+)$/im,
+    /(?:覚えておいて|覚えて|忘れないで|メモして)[:：,，]?\s*(.+)$/im,
+    /(?:기억해줘|기억해|잊지 마|잊지마|메모해줘|메모해)[:：,，]?\s*(.+)$/im,
+    /(?:please\s+)?remember\s+(?:this|that)?[:：,，]?\s*(.+)$/im,
+    /(?:please\s+)?(?:save|add)\s+(?:this|that)?\s*(?:to|in)\s+memory[:：,，]?\s*(.+)$/im,
+    /(?:please\s+)?commit\s+(?:this|that)?\s*to memory[:：,，]?\s*(.+)$/im,
+  ];
+
+  for (const pattern of triggerPatterns) {
+    const match = pattern.exec(text);
+    if (!match) continue;
+
+    const triggerIndex = match.index + (match[0].match(/^\s*/)?.[0]?.length || 0);
+    if (isNegatedMemoryRequest(text, triggerIndex)) return null;
+
+    const extracted = match[1]?.trim();
+    return extracted ? { text: extracted, hadTrigger: true } : null;
+  }
+
+  return { text, hadTrigger: false };
+}
+
 function extractFirstPath(text: string): string | undefined {
   return text.match(/[\w./-]+\.(ts|tsx|js|jsx|json|md|py|go|rs)/)?.[0];
 }
@@ -187,16 +226,22 @@ function extractFirstPath(text: string): string | undefined {
  * Quality gate for workspace memory candidates.
  * Rejects low-quality entries like git hashes, error messages, etc.
  */
-function shouldAcceptWorkspaceMemoryCandidate(entry: {
-  type: LongTermType;
-  text: string;
-}): boolean {
+function shouldAcceptWorkspaceMemoryCandidate(
+  entry: {
+    type: LongTermType;
+    text: string;
+  },
+  options: {
+    fromMemoryTrigger?: boolean;
+  } = {},
+): boolean {
   const text = entry.text.trim();
+  const minLength = options.fromMemoryTrigger ? 6 : 20;
 
   // Too short (with type-specific allowlist for stable config values)
   if (entry.type === "reference" && /\b(?:admin\s+)?pin\s|scrypt|n=\d+|r=\d+|p=\d+/i.test(text)) {
     // Stable config values can be short — allow below generic min length
-  } else if (text.length < 20) {
+  } else if (text.length < minLength) {
     return false;
   }
 
@@ -224,19 +269,33 @@ function shouldAcceptWorkspaceMemoryCandidate(entry: {
 
   // Session-specific progress snapshots for project type
   if (entry.type === "project") {
-    if (/\b\d+\s+tests?\s+pass(?:ed)?\b/i.test(text)) return false;
-    if (/\b\d+\s+suites?\b/i.test(text)) return false;
-    if (/\b\d+\s*(?:個|个)?\s*(?:files?|文件)/i.test(text)) return false;
-    // Reject "Phase N completed" using semantic window (within 20 chars either direction)
-    if (/\bphase\s*\d+(?:\s*[-–]\s*\d+)?\b.{0,20}\b(?:completed|done|finished)\b/i.test(text)) return false;
-    if (/\b(?:completed|done|finished)\b.{0,20}\bphase\s*\d+(?:\s*[-–]\s*\d+)?\b/i.test(text)) return false;
-    if (/已完成.{0,20}Phase\s*\d+(?:\s*[-–]\s*\d+)?/i.test(text)) return false;
-    if (/Phase\s*\d+(?:\s*[-–]\s*\d+)?.{0,20}已完成/i.test(text)) return false;
+    if (isProjectSnapshotViolation(text)) return false;
   }
 
   return true;
 }
 
+function isProjectSnapshotViolation(text: string): boolean {
+  // Test/suite counts
+  if (/\d+\s+tests?\s+pass(?:ed)?/i.test(text)) return true;
+  if (/\d+\s+suites?\s+(?:pass|fail)/i.test(text)) return true;
+
+  // File counts with snapshot/process context only, not static limits
+  if (/\d+\s*(?:個|个)?\s*(?:files?|文件)/i.test(text)) {
+    const hasSnapshotContext = /同步|synced|uploaded|downloaded|completed|generated|created|modified|processed|完成/i.test(text);
+    const hasLimitContext = /limit|max|maximum|min|minimum|supports?|allowed|per\s+(?:batch|request|upload)/i.test(text);
+    if (hasSnapshotContext && !hasLimitContext) return true;
+  }
+
+  // Phase/Wave/Sprint/Milestone/Task progress
+  if (/(?:phases?|waves?|sprints?|milestones?|tasks?)\s*\d+(?:\s*[-–]\s*\d+)?/i.test(text)) {
+    if (/completed|done|finished|完成/i.test(text)) return true;
+  }
+  if (/(?:已完成|完成).{0,30}(?:phases?|waves?|sprints?|milestones?|tasks?)/i.test(text)) return true;
+
+  return false;
+}
+
 /**
  * Extract candidate block from summary using multiple formats.
  * Supports: Plain text label, Markdown section, legacy XML.
@@ -275,16 +334,22 @@ export function parseWorkspaceMemoryCandidates(summary: string): LongTermMemoryE
     );
     if (!item) continue;
     const type = (item[1] ?? item[2]).toLowerCase() as LongTermType;
-    const body = item[3].trim();
-    if (body.length < 12) continue;
+    const normalizedBody = normalizeCandidateBody(item[3]);
+    if (!normalizedBody) continue;
+
+    const minLength = normalizedBody.hadTrigger ? 6 : 12;
+    if (normalizedBody.text.length < minLength) continue;
 
     // Apply quality gate
-    if (!shouldAcceptWorkspaceMemoryCandidate({ type, text: body })) continue;
+    if (!shouldAcceptWorkspaceMemoryCandidate(
+      { type, text: normalizedBody.text },
+      { fromMemoryTrigger: normalizedBody.hadTrigger },
+    )) continue;
 
     entries.push({
       id: id("mem"),
       type,
-      text: body.slice(0, LONG_TERM_LIMITS.maxEntryTextChars),
+      text: normalizedBody.text.slice(0, LONG_TERM_LIMITS.maxEntryTextChars),
       source: "compaction",
       confidence: 0.75,
       status: "active",
diff --git a/src/plugin.ts b/src/plugin.ts
index 4c8e80d..5447274 100644
--- a/src/plugin.ts
+++ b/src/plugin.ts
@@ -90,6 +90,14 @@ function buildCompactionPrompt(privateContext: string): string {
     "## Relevant Files",
     "",
     "At the end of the summary, extract durable memory entries for future sessions.",
+    "",
+    "Memory quality bar:",
+    "Extract only durable facts that will change future behavior: user preferences, decisions with rationale, stable constraints, or hard-to-rediscover references.",
+    "",
+    "Do not extract trivia: transient IDs/revisions, task progress, test/file counts, bare status updates, local UI details, or facts easily rediscovered from the repo.",
+    "",
+    "When unsure, skip it. Fewer high-signal memories are better than many low-value ones.",
+    "",
     "Only extract facts that are likely to stay true across sessions.",
     "Do not extract session-specific progress like exact test counts, file counts, or phase numbers.",
     "For progress, extract the stable goal or durable milestone, not the current number.",
diff --git a/src/types.ts b/src/types.ts
index ed97498..1a5e58d 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -28,6 +28,7 @@ export type WorkspaceMemoryStore = {
     maxEntries: number;
   };
   entries: LongTermMemoryEntry[];
+  migrations?: string[];
   updatedAt: string;
 };
 
diff --git a/src/workspace-memory.ts b/src/workspace-memory.ts
index 624bd18..24b90e5 100644
--- a/src/workspace-memory.ts
+++ b/src/workspace-memory.ts
@@ -5,6 +5,16 @@ import { atomicWriteJSON, readJSON, updateJSON } from "./storage.ts";
 
 // Minimum length for workspace_memory envelope: <workspace_memory>\n...\n</workspace_memory>
 const MIN_ENVELOPE_LENGTH = 80;
+const MIGRATION_ID = "2026-04-26-p0-cleanup";
+
+const SECRET_VALUE = String.raw`[^` + "`" + String.raw`'",，,\s\[]+`;
+
+const PASSWORD_LABELS = /password|passwd|pwd|密碼|密码|パスワード|비밀번호|contraseña|mot de passe|passwort/i;
+const USERNAME_LABELS = /username|user name|用戶名|用户名|ユーザー名|사용자명|usuario|utilisateur|benutzer/i;
+
+const PIN_PREFIX = String.raw`(\bPIN\b(?:\s*(?:是|=|:|：)\s*|\s+(?![是=:：])))`;
+const PASSWORD_PREFIX = String.raw`((?:${PASSWORD_LABELS.source})(?:\s*(?:是|=|:|：)\s*|\s+(?![是=:：])))`;
+const USERNAME_PREFIX = String.raw`((?:${USERNAME_LABELS.source})(?:\s*(?:是|=|:|：)\s*|\s+(?![是=:：])))`;
 
 export async function emptyWorkspaceMemory(root: string): Promise<WorkspaceMemoryStore> {
   return {
@@ -15,20 +25,53 @@ export async function emptyWorkspaceMemory(root: string): Promise<WorkspaceMemor
       maxEntries: LONG_TERM_LIMITS.maxEntries,
     },
     entries: [],
+    migrations: [],
     updatedAt: new Date().toISOString(),
   };
 }
 
 export async function loadWorkspaceMemory(root: string): Promise<WorkspaceMemoryStore> {
+  const path = await workspaceMemoryPath(root);
   const fallback = await emptyWorkspaceMemory(root);
-  const loaded = await readJSON(await workspaceMemoryPath(root), () => fallback);
-  loaded.workspace = { root, key: await workspaceKey(root) };
-  loaded.limits = {
-    maxRenderedChars: loaded.limits?.maxRenderedChars ?? LONG_TERM_LIMITS.maxRenderedChars,
-    maxEntries: loaded.limits?.maxEntries ?? LONG_TERM_LIMITS.maxEntries,
+  const loaded = await readJSON(path, () => fallback) as Partial<WorkspaceMemoryStore>;
+
+  const store: WorkspaceMemoryStore = {
+    version: loaded.version ?? 1,
+    workspace: loaded.workspace ?? { root, key: await workspaceKey(root) },
+    limits: {
+      maxRenderedChars: loaded.limits?.maxRenderedChars ?? LONG_TERM_LIMITS.maxRenderedChars,
+      maxEntries: loaded.limits?.maxEntries ?? LONG_TERM_LIMITS.maxEntries,
+    },
+    entries: Array.isArray(loaded.entries) ? loaded.entries : [],
+    migrations: Array.isArray(loaded.migrations) ? loaded.migrations : [],
+    updatedAt: loaded.updatedAt ?? fallback.updatedAt,
   };
-  loaded.entries = Array.isArray(loaded.entries) ? loaded.entries : [];
-  return loaded;
+
+  // Always normalize on load so redaction/migrations are always-on.
+  const normalized = await normalizeWorkspaceMemory(root, store);
+
+  // Persist only when meaningful content changed (ignore timestamps).
+  if (didStoreMeaningfullyChange(store, normalized)) {
+    await atomicWriteJSON(path, normalized);
+  }
+
+  return normalized;
+}
+
+function didStoreMeaningfullyChange(
+  before: WorkspaceMemoryStore,
+  after: WorkspaceMemoryStore,
+): boolean {
+  const sanitize = (store: WorkspaceMemoryStore) => ({
+    ...store,
+    updatedAt: "",
+    entries: store.entries.map(entry => ({
+      ...entry,
+      updatedAt: "",
+    })),
+  });
+
+  return JSON.stringify(sanitize(before)) !== JSON.stringify(sanitize(after));
 }
 
 export async function saveWorkspaceMemory(root: string, store: WorkspaceMemoryStore): Promise<void> {
@@ -52,14 +95,130 @@ async function normalizeWorkspaceMemory(
   root: string,
   store: WorkspaceMemoryStore,
 ): Promise<WorkspaceMemoryStore> {
-  store.workspace = { root, key: await workspaceKey(root) };
-  store.limits = {
-    maxRenderedChars: store.limits?.maxRenderedChars ?? LONG_TERM_LIMITS.maxRenderedChars,
-    maxEntries: store.limits?.maxEntries ?? LONG_TERM_LIMITS.maxEntries,
+  const nowIso = new Date().toISOString();
+
+  let result: WorkspaceMemoryStore = {
+    ...store,
+    workspace: { root, key: await workspaceKey(root) },
+    limits: {
+      maxRenderedChars: store.limits?.maxRenderedChars ?? LONG_TERM_LIMITS.maxRenderedChars,
+      maxEntries: store.limits?.maxEntries ?? LONG_TERM_LIMITS.maxEntries,
+    },
+    entries: Array.isArray(store.entries) ? store.entries : [],
+    migrations: Array.isArray(store.migrations) ? store.migrations : [],
+    updatedAt: nowIso,
+  };
+
+  // Always-on credential redaction
+  result.entries = result.entries.map(entry => {
+    const text = redactCredentials(entry.text);
+    const rationale = entry.rationale ? redactCredentials(entry.rationale) : undefined;
+
+    if (text === entry.text && rationale === entry.rationale) {
+      return entry;
+    }
+
+    return {
+      ...entry,
+      text,
+      rationale,
+      updatedAt: nowIso,
+    };
+  });
+
+  // One-time migration for legacy snapshot violations
+  result = runMigrationP0Cleanup(result, nowIso);
+
+  // Enforce limits on active entries while preserving superseded entries in storage
+  const activeEntries = result.entries.filter(entry => entry.status !== "superseded");
+  const supersededEntries = result.entries.filter(entry => entry.status === "superseded");
+  const processedActive = enforceLongTermLimits(activeEntries);
+
+  return {
+    ...result,
+    entries: [...processedActive, ...supersededEntries],
+    updatedAt: nowIso,
+  };
+}
+
+export function redactCredentials(text: string): string {
+  let result = text;
+
+  // 1. PIN
+  result = result.replace(
+    new RegExp(String.raw`${PIN_PREFIX}[\`'"]?(${SECRET_VALUE})`, "gi"),
+    "$1[REDACTED]",
+  );
+
+  // 2. Username+password pair
+  result = result.replace(
+    new RegExp(
+      String.raw`${USERNAME_PREFIX}[\`'"]?(${SECRET_VALUE})((?:，|,)\s*)${PASSWORD_PREFIX}[\`'"]?(${SECRET_VALUE})`,
+      "gi",
+    ),
+    "$1[REDACTED]$3$4[REDACTED]",
+  );
+
+  // 3. Standalone password
+  result = result.replace(
+    new RegExp(String.raw`${PASSWORD_PREFIX}[\`'"]?(${SECRET_VALUE})`, "gi"),
+    "$1[REDACTED]",
+  );
+
+  return result;
+}
+
+export function isProjectSnapshotViolation(text: string): boolean {
+  // Test/suite counts
+  if (/\d+\s+tests?\s+pass(?:ed)?/i.test(text)) return true;
+  if (/\d+\s+suites?\s+(?:pass|fail)/i.test(text)) return true;
+
+  // File counts with snapshot context, excluding limit statements
+  if (/\d+\s*(?:個|个)?\s*(?:files?|文件)/i.test(text)) {
+    const hasSnapshotContext = /同步|synced|uploaded|downloaded|completed|generated|created|modified|processed|完成/i.test(text);
+    const hasLimitContext = /limit|max|maximum|min|minimum|supports?|allowed|per\s+(?:batch|request|upload)/i.test(text);
+    if (hasSnapshotContext && !hasLimitContext) return true;
+  }
+
+  // Phase/Wave/Sprint/Milestone/Task progress
+  if (/(?:phases?|waves?|sprints?|milestones?|tasks?)\s*\d+(?:\s*[-–]\s*\d+)?/i.test(text)) {
+    if (/completed|done|finished|完成/i.test(text)) return true;
+  }
+
+  if (/(?:已完成|完成).{0,30}(?:phases?|waves?|sprints?|milestones?|tasks?)/i.test(text)) return true;
+
+  return false;
+}
+
+export function runMigrationP0Cleanup(
+  store: WorkspaceMemoryStore,
+  nowIso: string,
+): WorkspaceMemoryStore {
+  if (store.migrations?.includes(MIGRATION_ID)) {
+    return store;
+  }
+
+  const entries = store.entries.map(entry => {
+    if (entry.source === "explicit") return entry;
+    if (entry.type !== "project") return entry;
+
+    if (isProjectSnapshotViolation(entry.text)) {
+      return {
+        ...entry,
+        status: "superseded" as const,
+        updatedAt: nowIso,
+      };
+    }
+
+    return entry;
+  });
+
+  return {
+    ...store,
+    entries,
+    migrations: [...(store.migrations || []), MIGRATION_ID],
+    updatedAt: nowIso,
   };
-  store.entries = enforceLongTermLimits(store.entries);
-  store.updatedAt = new Date().toISOString();
-  return store;
 }
 
 function sourcePriority(source: LongTermMemoryEntry["source"]): number {
@@ -181,7 +340,7 @@ export function enforceLongTermLimits(entries: LongTermMemoryEntry[]): LongTermM
 
   // Phase 1: filter active, prune by age
   const phase1 = entries
-    .filter(entry => entry.status === "active")
+    .filter(entry => entry.status !== "superseded")
     .filter(entry => !isPrunableByAge(entry, now))
     .map(entry => ({ ...entry, text: entry.text.slice(0, LONG_TERM_LIMITS.maxEntryTextChars) }));
 
diff --git a/tests/extractors.test.ts b/tests/extractors.test.ts
index c2ffd69..40a6f2c 100644
--- a/tests/extractors.test.ts
+++ b/tests/extractors.test.ts
@@ -304,6 +304,31 @@ Memory candidates:
   assert.equal(items.length, 0, "Phase progress is session snapshot, not durable milestone");
 });
 
+test("parseWorkspaceMemoryCandidates rejects wave/sprint/milestone/task progress snapshots", () => {
+  const summary = `
+Memory candidates:
+- project Waves 1-5 已完成，Wave 6 deferred
+- project Sprint 3 completed
+- project Milestone 2 done
+- project Task 8 finished
+`;
+
+  const items = parseWorkspaceMemoryCandidates(summary);
+  assert.equal(items.length, 0, "Wave/Sprint/Milestone/Task progress should be rejected as snapshots");
+});
+
+test("parseWorkspaceMemoryCandidates keeps file limits but rejects file sync snapshots", () => {
+  const summary = `
+Memory candidates:
+- project Upload limit is 10 files per request
+- project USB uploaded 37 files for sync verification
+`;
+
+  const items = parseWorkspaceMemoryCandidates(summary);
+  assert.equal(items.length, 1, "Should keep static file-limit facts and reject processed file-count snapshots");
+  assert.match(items[0].text, /Upload limit is 10 files/);
+});
+
 test("parseWorkspaceMemoryCandidates accepts durable project facts", () => {
   const summary = `
 Memory candidates:
@@ -360,4 +385,53 @@ Memory candidates:
 
   const items = parseWorkspaceMemoryCandidates(summary);
   assert.equal(items.length, 0, "Phase snapshot mid-description should still be rejected");
-});
\ No newline at end of file
+});
+
+test("parseWorkspaceMemoryCandidates extracts Japanese triggers", () => {
+  const summary = `
+Memory candidates:
+- project 覚えて: このプロジェクトは pnpm を使う
+- project 覚えておいて: 日本語でメモ
+`;
+  const items = parseWorkspaceMemoryCandidates(summary);
+  assert.equal(items.length, 2);
+  assert.match(items[0].text, /pnpm/);
+});
+
+test("parseWorkspaceMemoryCandidates extracts Korean triggers", () => {
+  const summary = `
+Memory candidates:
+- project 기억해: 이 프로젝트는 pnpm을 사용한다
+- project 메모해줘: 한국어 메모
+`;
+  const items = parseWorkspaceMemoryCandidates(summary);
+  assert.equal(items.length, 2);
+});
+
+test("parseWorkspaceMemoryCandidates rejects negated Japanese triggers", () => {
+  const summary = `
+Memory candidates:
+- project 覚えないで 覚えて: 一時的なメモ
+`;
+  const items = parseWorkspaceMemoryCandidates(summary);
+  assert.equal(items.length, 0, "Negated Japanese trigger should be rejected");
+});
+
+test("parseWorkspaceMemoryCandidates rejects negated Korean triggers", () => {
+  const summary = `
+Memory candidates:
+- project 기억하지 마 기억해: 일시적인 메모
+`;
+  const items = parseWorkspaceMemoryCandidates(summary);
+  assert.equal(items.length, 0, "Negated Korean trigger should be rejected");
+});
+
+test("parseWorkspaceMemoryCandidates body extraction excludes trigger suffix", () => {
+  const summary = `
+Memory candidates:
+- project 覚えておいて: このプロジェクトは pnpm を使う
+`;
+  const items = parseWorkspaceMemoryCandidates(summary);
+  assert.equal(items[0].text, "このプロジェクトは pnpm を使う");
+  assert.equal(items[0].text.includes("おいて"), false);
+});
diff --git a/tests/workspace-memory.test.ts b/tests/workspace-memory.test.ts
index 371af6c..e48931d 100644
--- a/tests/workspace-memory.test.ts
+++ b/tests/workspace-memory.test.ts
@@ -1,7 +1,20 @@
 import test from "node:test";
 import assert from "node:assert/strict";
+import { mkdtemp, rm } from "node:fs/promises";
+import { join, dirname } from "node:path";
+import { tmpdir } from "node:os";
 import type { LongTermMemoryEntry, WorkspaceMemoryStore } from "../src/types.ts";
-import { renderWorkspaceMemory, enforceLongTermLimits } from "../src/workspace-memory.ts";
+import { LONG_TERM_LIMITS } from "../src/types.ts";
+import { workspaceMemoryPath } from "../src/paths.ts";
+import {
+  renderWorkspaceMemory,
+  enforceLongTermLimits,
+  redactCredentials,
+  isProjectSnapshotViolation,
+  runMigrationP0Cleanup,
+  loadWorkspaceMemory,
+  saveWorkspaceMemory,
+} from "../src/workspace-memory.ts";
 
 function entry(id: string, text: string, type: LongTermMemoryEntry["type"] = "decision"): LongTermMemoryEntry {
   const now = new Date().toISOString();
@@ -413,4 +426,230 @@ test("enforceLongTermLimits feedback: supersession prefers newer shorter over ol
   const feedbackEntries = kept.filter(e => e.type === "feedback");
   assert.equal(feedbackEntries.length, 1, "Newer shorter feedback should supersede older longer");
   assert.ok(feedbackEntries[0].text.includes("template replacement"), "Kept entry should be the newer fix");
-});
\ No newline at end of file
+});
+
+// ============================================
+// Workspace cleanup migration tests
+// ============================================
+
+test("redactCredentials preserves PIN delimiter variants", () => {
+  assert.equal(redactCredentials("Admin PIN 是 456123"), "Admin PIN 是 [REDACTED]");
+  assert.equal(redactCredentials("Admin PIN = 456123"), "Admin PIN = [REDACTED]");
+  assert.equal(redactCredentials("Admin PIN 456123"), "Admin PIN [REDACTED]");
+});
+
+test("redactCredentials handles multilingual passwords", () => {
+  assert.equal(redactCredentials("パスワード：secret"), "パスワード：[REDACTED]");
+  assert.equal(redactCredentials("비밀번호: secret"), "비밀번호: [REDACTED]");
+  assert.equal(redactCredentials("contraseña: secret"), "contraseña: [REDACTED]");
+});
+
+test("redactCredentials handles username+password pair and punctuation boundary", () => {
+  assert.equal(
+    redactCredentials("測試用戶名：shihlab，密碼：sushi"),
+    "測試用戶名：[REDACTED]，密碼：[REDACTED]",
+  );
+  assert.equal(
+    redactCredentials("密碼：sushi，用於測試"),
+    "密碼：[REDACTED]，用於測試",
+  );
+});
+
+test("redactCredentials is idempotent and also redacts rationale text", () => {
+  assert.equal(redactCredentials("password: [REDACTED]"), "password: [REDACTED]");
+
+  const now = new Date().toISOString();
+  const store: WorkspaceMemoryStore = {
+    version: 1,
+    workspace: { root: "/repo", key: "abc" },
+    limits: { maxRenderedChars: 5200, maxEntries: 28 },
+    migrations: [],
+    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 migrated = runMigrationP0Cleanup(
+    {
+      ...store,
+      entries: store.entries.map(entry => ({
+        ...entry,
+        text: redactCredentials(entry.text),
+        rationale: entry.rationale ? redactCredentials(entry.rationale) : undefined,
+      })),
+    },
+    now,
+  );
+  assert.equal(migrated.entries[0].text, "Admin PIN 是 [REDACTED]");
+  assert.equal(migrated.entries[0].rationale, "password: [REDACTED]");
+});
+
+test("isProjectSnapshotViolation detects wave progress and avoids limit context false positives", () => {
+  assert.equal(isProjectSnapshotViolation("1237 tests pass, 226 suites"), true);
+  assert.equal(isProjectSnapshotViolation("USB 同步：37 個文件"), true);
+  assert.equal(isProjectSnapshotViolation("Waves 1-5 已完成，Wave 6 deferred"), true);
+
+  assert.equal(isProjectSnapshotViolation("Upload limit is 10 files"), false);
+  assert.equal(isProjectSnapshotViolation("Project supports 5 test suites"), false);
+});
+
+test("runMigrationP0Cleanup marks only non-explicit project snapshots and runs once", () => {
+  const now = new Date().toISOString();
+  const later = new Date(Date.now() + 1000).toISOString();
+
+  const store: WorkspaceMemoryStore = {
+    version: 1,
+    workspace: { root: "/repo", key: "abc" },
+    limits: { maxRenderedChars: 5200, maxEntries: 28 },
+    migrations: [],
+    entries: [
+      {
+        id: "project-snapshot",
+        type: "project",
+        text: "Phase 1-4 已完成",
+        source: "compaction",
+        confidence: 0.75,
+        status: "active",
+        createdAt: now,
+        updatedAt: now,
+      },
+      {
+        id: "project-explicit",
+        type: "project",
+        text: "Waves 1-5 已完成",
+        source: "explicit",
+        confidence: 1,
+        status: "active",
+        createdAt: now,
+        updatedAt: now,
+      },
+      {
+        id: "feedback-snapshot-like",
+        type: "feedback",
+        text: "1237 tests pass",
+        source: "compaction",
+        confidence: 0.75,
+        status: "active",
+        createdAt: now,
+        updatedAt: now,
+      },
+    ],
+    updatedAt: now,
+  };
+
+  const once = runMigrationP0Cleanup(store, now);
+  assert.deepEqual(once.migrations, ["2026-04-26-p0-cleanup"]);
+  assert.equal(once.entries.find(e => e.id === "project-snapshot")?.status, "superseded");
+  assert.equal(once.entries.find(e => e.id === "project-explicit")?.status, "active");
+  assert.equal(once.entries.find(e => e.id === "feedback-snapshot-like")?.status, "active");
+
+  const twice = runMigrationP0Cleanup(once, later);
+  assert.deepEqual(twice.migrations, ["2026-04-26-p0-cleanup"], "migration id should not duplicate");
+  assert.equal(twice.entries.find(e => e.id === "project-snapshot")?.updatedAt, once.entries.find(e => e.id === "project-snapshot")?.updatedAt);
+});
+
+test("renderWorkspaceMemory excludes superseded entries", () => {
+  const now = new Date().toISOString();
+  const store: WorkspaceMemoryStore = {
+    version: 1,
+    workspace: { root: "/repo", key: "abc" },
+    limits: { maxRenderedChars: 5200, maxEntries: 28 },
+    migrations: ["2026-04-26-p0-cleanup"],
+    entries: [
+      {
+        id: "active-1",
+        type: "decision",
+        text: "Use pnpm for this workspace",
+        source: "compaction",
+        confidence: 0.75,
+        status: "active",
+        createdAt: now,
+        updatedAt: now,
+      },
+      {
+        id: "sup-1",
+        type: "project",
+        text: "Waves 1-5 已完成",
+        source: "compaction",
+        confidence: 0.75,
+        status: "superseded",
+        createdAt: now,
+        updatedAt: now,
+      },
+    ],
+    updatedAt: now,
+  };
+
+  const rendered = renderWorkspaceMemory(store);
+  assert.match(rendered, /Use pnpm/);
+  assert.doesNotMatch(rendered, /Waves 1-5 已完成/);
+});
+
+test("loadWorkspaceMemory normalizes and persists credentials from legacy unredacted store", async () => {
+  const sandbox = await mkdtemp(join(tmpdir(), "wm-redact-"));
+  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();
+    // Write UNREDACTED JSON directly to disk (simulating legacy store)
+    const unredactedStore: WorkspaceMemoryStore = {
+      version: 1,
+      workspace: { root, key: "test" },
+      limits: {
+        maxRenderedChars: LONG_TERM_LIMITS.maxRenderedChars,
+        maxEntries: LONG_TERM_LIMITS.maxEntries,
+      },
+      entries: [
+        {
+          id: "cred-1",
+          text: "Admin PIN 是 456123",
+          type: "project",
+          source: "compaction",
+          confidence: 0.75,
+          status: "active",
+          createdAt: now,
+          updatedAt: now,
+        },
+      ],
+      migrations: [],
+      updatedAt: now,
+    };
+
+    // Write directly to disk WITHOUT using saveWorkspaceMemory (which would redact)
+    const { mkdir, writeFile } = await import("node:fs/promises");
+    const storePath = await workspaceMemoryPath(root);
+    await mkdir(dirname(storePath), { recursive: true });
+    await writeFile(storePath, JSON.stringify(unredactedStore, null, 2), "utf-8");
+
+    // Load should normalize and redact
+    const loaded = await loadWorkspaceMemory(root);
+    assert.equal(loaded.entries[0].text, "Admin PIN 是 [REDACTED]");
+
+    // Verify persisted to disk (not just in-memory)
+    const { readFile } = await import("node:fs/promises");
+    const persistedRaw = await readFile(storePath, "utf-8");
+    const persisted = JSON.parse(persistedRaw);
+    assert.equal(persisted.entries[0].text, "Admin PIN 是 [REDACTED]");
+  } finally {
+    if (previousXdgDataHome === undefined) {
+      delete process.env.XDG_DATA_HOME;
+    } else {
+      process.env.XDG_DATA_HOME = previousXdgDataHome;
+    }
+    await rm(sandbox, { recursive: true, force: true });
+  }
+});