feat(pi-hermes-memory): 导入上游 v0.9.10 源码快照

从官方 Git 仓库导入 chandra447/pi-hermes-memory 在 tag v0.9.10
（df624056a2e8c68bc89ba0a81e1c120856ec9665，2026-10-02）的源码快照。
本次仅导入源码，尚未接入组合包：package.json、加载顺序、依赖与权限策略
均未改动。

- 原样导入 src/、tests/、docs/、scripts/、README、CHANGELOG、PLAN、
  AGENTS 与 LICENSE；该快照共 156 个上游文件。
- 剔除嵌套 .git、上游 .github 工作流、.ralph/、.claude/、node_modules、
  覆盖率与构建产物。
- 新增中文 UPSTREAM.md，记录来源，以及启用前必须完成的待决事项：
  在 pi-compaction 之前注册加载顺序、better-sqlite3 版本与根 allowScripts
  对齐、strip-ansi 解析确认。
- 说明选择 tag 而非 main 的原因：导入时上游 main 已领先至
  24fcd8ad26fc27badb8d7dbaf8034645de07b893（2026-10-11），选 tag 是为
  对应一个已发布、可复现的版本。

尚未接线。启用前还需反转 tests/extension-load.test.ts 中"不得加载
Hermes"的断言，并同步 pi-tool-search 分组、权限策略与文档。

验证：快照 156 个上游文件全部导入，目录内仅多出 UPSTREAM.md 一份；
已确认与上游 main 内容存在差异，证明取的是 tag 而非 main。

pi-hermes-memory/docs/0.4/TASKS.md

@@ -0,0 +1,113 @@
+# v0.4 Tasks: SQLite FTS5 Session Search + Hybrid Memory
+
+## Status Legend
+- `[ ]` Not started
+- `[~]` In progress
+- `[x]` Done
+
+---
+
+## Epic 1: SQLite Foundation ✅
+
+### Task 1.1: Install better-sqlite3 and create DB module
+- [x] Install `better-sqlite3` + `@types/better-sqlite3`
+- [x] Create `src/store/db.ts` — DatabaseManager class
+- [x] Create `tests/store/db.test.ts` — 14 tests passing
+
+### Task 1.2: Create schema and migrations
+- [x] Define schema in `src/store/schema.ts`
+- [x] Add triggers to keep FTS index in sync
+- [x] Test: schema creates cleanly on fresh DB, idempotent on existing DB
+
+---
+
+## Epic 2: Session History Indexing ✅
+
+### Task 2.1: JSONL parser
+- [x] Create `src/store/session-parser.ts`
+- [x] Create `tests/store/session-parser.test.ts` — 14 tests passing
+
+### Task 2.2: Session indexer
+- [x] Create `src/store/session-indexer.ts`
+- [x] Create `tests/store/session-indexer.test.ts` — 12 tests passing
+
+### Task 2.3: /memory-index-sessions command
+- [x] Create `src/handlers/index-sessions.ts`
+- [x] Wire into `src/index.ts`
+
+---
+
+## Epic 3: Session Search ✅
+
+### Task 3.1: Session search store
+- [x] Create `src/store/session-search.ts` — FTS5 search
+- [x] Create `tests/store/session-search.test.ts` — 11 tests passing
+
+### Task 3.2: session_search tool
+- [x] Create `src/tools/session-search-tool.ts`
+- [x] Register in `src/index.ts`
+
+---
+
+## Epic 4: Extended Memory Store ✅
+
+### Task 4.1: SQLite memory store
+- [x] Create `src/store/sqlite-memory-store.ts`
+- [x] Create `tests/store/sqlite-memory-store.test.ts` — 19 tests passing
+
+### Task 4.2: memory_search tool
+- [x] Create `src/tools/memory-search-tool.ts`
+- [x] Register in `src/index.ts`
+
+---
+
+## Epic 5: Char Limit Increase ✅
+
+### Task 5.1: Update defaults
+- [x] Update `src/constants.ts` — 5000 defaults
+- [x] Update `src/types.ts` — updated comments
+- [x] Update README configuration table
+
+### Task 5.2: Update tests
+- [x] Updated all tests that depend on char limits
+- [x] Verified consolidation still works at new limits
+
+---
+
+## Epic 6: Integration & Polish ✅
+
+### Task 6.1: Wire everything into index.ts
+- [x] Initialize DatabaseManager on extension load
+- [x] Register `session_search` and `memory_search` tools
+- [x] Register `/memory-index-sessions` command
+- [x] Auto-index session on `session_shutdown` event
+
+### Task 6.2: Add session indexing to background review
+- [x] Auto-index on session_shutdown (indexes most recent session)
+
+### Task 6.3: Update README
+- [x] Added session history search and extended memory sections
+- [x] Updated char limits: 2200/1375 → 5000
+- [x] Updated configuration table and JSON example
+- [x] Updated Where Data Lives with sessions.db
+- [x] Updated Known Limitations
+
+### Task 6.4: Version bump & release
+- [x] Bump version to `0.4.0`
+- [x] Run full test suite — 272 tests passing
+- [x] Publish to npm
+- [x] Create GitHub release
+
+---
+
+## Summary
+
+| Epic | Files Created | Tests |
+|---|---|---|
+| 1. SQLite Foundation | db.ts, schema.ts | 14 |
+| 2. Session Indexing | session-parser.ts, session-indexer.ts, index-sessions.ts | 26 |
+| 3. Session Search | session-search.ts, session-search-tool.ts | 11 |
+| 4. Extended Memory | sqlite-memory-store.ts, memory-search-tool.ts | 19 |
+| 5. Char Limits | constants.ts, types.ts | — |
+| 6. Integration | index.ts, README.md, learn-memory-tool skill | — |
+| **Total** | **12 new files** | **272 tests** |