[Critical] Test failure: backupTime assertion expects a Date instance but receives undefined.

The test "restores persisted file-history snapshots when resuming a session" fails because snapshots[0]?.trackedFileBackups['/tmp/src/app.ts']?.backupTime is undefined instead of a Date. This indicates that the snapshot restoration path through FileHistoryService.restoreFromSnapshots() is not properly hydrating the backupTime field when the input uses a string-typed-but-cast-as-Date value (as happens when snapshots are deserialized from JSONL).

This is the core feature of this PR — if the restoration test itself fails, the feature is not working as intended.

— DeepSeek/deepseek-v4-pro via Qwen Code /review

[Critical] restoreFromSnapshots() called without try/catch — a single malformed snapshot makes file history permanently broken for the session.

In getFileHistoryService(), the restoreFromSnapshots() call is not wrapped in try/catch. If it throws (e.g., corrupted trackedFileBackups from a malformed JSONL record), fileHistoryRestoredFromSessionData stays false while this.fileHistoryService has already been assigned. Every subsequent call to getFileHistoryService() will retry the restore and throw again — an unrecoverable persistent failure. This propagates to TUI render paths (DialogManager.tsx passes config.getFileHistoryService() as a prop) and tool execution, potentially crashing the RewindSelector dialog or blocking file operations.

— DeepSeek/deepseek-v4-pro via Qwen Code /review

[Critical] restoreFromSnapshots() lacks structural guards against malformed snapshot data.

The method iterates Object.entries(snapshot.trackedFileBackups) and spreads ...backup without checking whether snapshot, snapshot.trackedFileBackups, or backup are actually the expected types. A corrupted JSONL record (e.g., trackedFileBackups: null or a backup entry that is null instead of an object) would throw TypeErrors with no diagnostic context about which snapshot or file path caused the failure. Combined with the missing try/catch in the caller (config.ts), this becomes a persistent unrecoverable error.

— DeepSeek/deepseek-v4-pro via Qwen Code /review

[Suggestion] The catch block's error message is misleading: it always logs "makeSnapshot failed" but the try block now also calls getFileHistoryService() (which can throw from restoreFromSnapshots), getSnapshots(), and recordFileHistorySnapshot(). Any exception from those operations will be misattributed to makeSnapshot, sending anyone debugging the issue on a wild goose chase.

— DeepSeek/deepseek-v4-pro via Qwen Code /review

[Suggestion] extractFileHistorySnapshots() validates payload?.version !== 1 || !snapshot but never checks that snapshot has the required fields (promptId, trackedFileBackups, timestamp) or that trackedFileBackups is an object. A record with { version: 1, snapshot: { promptId: "x" } } (missing trackedFileBackups) would pass through, reach restoreFromSnapshots(), and throw a TypeError on Object.entries(undefined). Validation closer to the ingestion point improves debuggability.

— DeepSeek/deepseek-v4-pro via Qwen Code /review

[Suggestion] The new snapshot recording integration (lines 1244-1251) has zero test coverage in client.test.ts. This is the central hook where makeSnapshot output is persisted to the session JSONL log — the success path (promptId matches), the mismatch path (snapshot was a no-op), and the error path are all untested. Consider adding at least a unit test that verifies recordFileHistorySnapshot is called with the correct snapshot after makeSnapshot.

— DeepSeek/deepseek-v4-pro via Qwen Code /review

[Suggestion] Path traversal risk from session JSONL data. The new data flow lets file paths from session JSONL records enter restoreFromSnapshots() → maybeShortenFilePath() and ultimately into trackedFiles set. Paths containing ../ sequences that survive maybeShortenFilePath (which passes non-absolute paths through unchanged) would later be expanded via maybeExpandFilePath (join(this.cwd, filePath)) and used in filesystem ops (stat, readFile, copyFile). While the JSONL files are user-owned, consider adding a resolved.startsWith(this.cwd) check in restoreFromSnapshots as defense-in-depth to prevent restored paths from escaping the project root.

— DeepSeek/deepseek-v4-pro via Qwen Code /review

[Blocker] 整个文件 1860/1860 行都是 CRLF（grep -c $'\\r$' 实测）。和 main 比真实语义改动只有 15 行，但 raw diff 是 3415 行。这条 commit 落地后：

• git blame 完全断（每一行都看似在 fix(core): restore file history snapshots on resume #4253 被改过）
• 此后改这个文件的每条 PR 都会跟 main 冲突
• 历史导航不可用

建议在本地 PR 分支上：

dos2unix packages/core/src/core/client.ts
git add packages/core/src/core/client.ts && git commit --amend --no-edit

对 config.ts / sessionService.ts / fileHistoryService.ts 三个文件做同样的操作。仓库根加 .gitattributes * text=auto eol=lf 防止后续再发生。

[Suggestion, post-approve carry-over] 新加的 snapshot 录入 hook（L1244-1252）在 client.test.ts 里零覆盖。这是 makeSnapshot → JSONL 持久化的中心 hook，断了的话整个 resume 路径都不能恢复 snapshot 状态。

至少补一个 client.test.ts 用例：

• 设 messageType = UserQuery，stub fileHistoryService.makeSnapshot 返回一个带 promptId 的 snapshot
• 断言 chatRecordingService.recordFileHistorySnapshot 被以该 snapshot 调用
• 再加一个 negative case：makeSnapshot 抛错时不传播到调用方（被 try/catch 兜住），但 debugLogger.error 记录了

EOL 修完之后顺手补，不必单独再发一轮。

[Suggestion, post-approve carry-over] 路径遍历 defense-in-depth：session JSONL 数据 → restoreFromSnapshots() → maybeShortenFilePath() → trackedFiles Set → maybeExpandFilePath()（join(this.cwd, filePath)）→ filesystem ops (stat/readFile/copyFile)。

含 ../ 的相对路径会被 maybeShortenFilePath 原样穿过，后面 join 出来的路径可以逃出 cwd。JSONL 是用户自有，attack surface 窄，但加一行 defense-in-depth 防 future regression 很便宜：

const trackingPath = this.maybeShortenFilePath(p);
const resolved = path.resolve(this.cwd, trackingPath);
if (!resolved.startsWith(this.cwd + path.sep) && resolved !== this.cwd) {
  debugLogger.warn(`Skipping snapshot path outside cwd: ${p}`);
  continue;
}
trackedFiles.add(trackingPath);

EOL 修完之后顺手补即可。

[Critical] Systematic UTF-8 encoding corruption across ~40 lines in 3 files (config.ts, fileHistoryService.test.ts, sessionService.test.ts). The third byte of multi-byte UTF-8 sequences is replaced with 0x3F (ASCII ?): em-dash — (U+2014, e2 80 94) → e2 80 3f, arrow → (U+2192) → e2 86 92 3f, ≥ (U+2265) → e2 89 65 3f. Verified at byte level via xxd. This is not a rendering artifact — the files are actually corrupted on disk, likely caused by a tool/editor that processed files through a non-UTF-8-aware pipeline.

Impact: comments become mojibake, CI encoding checks would fail, and readability is permanently degraded.

Fix: revert all encoding-only changes and re-apply the semantic changes on top of unmodified source text. On the PR branch:

git checkout origin/main -- packages/core/src/config/config.ts packages/core/src/services/fileHistoryService.test.ts packages/core/src/services/sessionService.test.ts
# Then re-apply only the semantic changes

— qwen-latest-series-invite-beta-v28 via Qwen Code /review

[Suggestion] fileHistoryRestoredFromSessionData = true is set unconditionally after the try/catch, so if restoreFromSnapshots throws (transient I/O error, corrupted data), the flag prevents any retry on subsequent getFileHistoryService() calls — permanently disabling file-history restoration for the session with only a debug-level log.

Move the flag assignment inside the try block so it only flips on success, allowing retry on the next access.

— qwen-latest-series-invite-beta-v28 via Qwen Code /review

[Suggestion] The type guard isFileHistoryBackupRecord accepts any non-null object (!!value && typeof value === 'object'), including arrays and objects without any FileHistoryBackup fields. While downstream toValidDate(backup.backupTime) catches entries missing backupTime, an object with a valid backupTime but missing backupFileName would pass through and produce undefined in path resolution.

— qwen-latest-series-invite-beta-v28 via Qwen Code /review

[Suggestion] restoreFromSnapshots sets this.state.snapshots = migrated without enforcing the MAX_SNAPSHOTS = 100 cap. Eviction only runs inside makeSnapshot. If the JSONL contains more than 100 snapshot records (long session, data corruption), all are loaded into memory and the orphaned-backup cleanup that eviction triggers is never reached for the extras.

Consider capping before assignment:

if (migrated.length > MAX_SNAPSHOTS) {
  migrated = migrated.slice(migrated.length - MAX_SNAPSHOTS);
}

— qwen-latest-series-invite-beta-v28 via Qwen Code /review

[Nice to have] Indentation regression: this it(...) line was re-indented from 4 spaces to 2 spaces, breaking alignment with sibling test cases in the same describe block. Likely an accidental edit during rebase.

— qwen-latest-series-invite-beta-v28 via Qwen Code /review