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gemini-cli - 💡(How to fix) Fix Missing projectHash makes a real JSONL session unlistable [1 participants]

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google-gemini/gemini-cli#27275•Fetched 2026-05-20 03:59:37
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jpmartins98jpmartins98
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Root Cause

The JSONL loader requires both sessionId and projectHash. If sessionId exists but projectHash is missing, it falls back to the legacy parser. The legacy parser tries to parse the entire file with JSON.parse(fileContent). But JSONL is multiple JSON records separated by newlines, not one JSON document. So the fallback fails and returns null. A session with real messages can become invisible because one metadata field is missing.

Code Example

if (!metadata.sessionId || !metadata.projectHash) {
    return await parseLegacyRecordFallback(filePath, options);
  }

  packages/core/src/services/chatRecordingService.ts:994

  const fileContent = await fs.promises.readFile(filePath, 'utf8');
  const parsed = JSON.parse(fileContent) as unknown;

---

╭─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
│                                                                                                                                                                                                                                                                                 │
│ About Gemini CLI                                                                                                                                                                                                                                                                │
│                                                                                                                                                                                                                                                                                 │
│ CLI Version                                                                                    0.42.0                                                                                                                                                                           │
│ Git Commit                                                                                     68e2196d5                                                                                                                                                                        │
│ Model                                                                                          Auto (Gemini 3)                                                                                                                                                                  │
│ Sandbox                                                                                        no sandbox                                                                                                                                                                       │
│ OS                                                                                             linux                                                                                                                                                                            │
│ Auth Method                                                                                    Signed in with Google                                                                                                                             │
│ Tier                                                                                           Gemini Code Assist in Google One AI Pro                                                                                                                                          │
│                                                                                                                                                                                                                                                                                 │
╰─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯
RAW_BUFFERClick to expand / collapse

What happened?

The JSONL loader requires both sessionId and projectHash. If sessionId exists but projectHash is missing, it falls back to the legacy parser. The legacy parser tries to parse the entire file with JSON.parse(fileContent). But JSONL is multiple JSON records separated by newlines, not one JSON document. So the fallback fails and returns null. A session with real messages can become invisible because one metadata field is missing.

packages/core/src/services/chatRecordingService.ts:237

  if (!metadata.sessionId || !metadata.projectHash) {
    return await parseLegacyRecordFallback(filePath, options);
  }

  packages/core/src/services/chatRecordingService.ts:994

  const fileContent = await fs.promises.readFile(filePath, 'utf8');
  const parsed = JSON.parse(fileContent) as unknown;

What did you expect to happen?

If a JSONL file has a valid sessionId and real user/gemini messages, it should still be recoverable. projectHash is useful metadata, but it should not be required to decide whether the session exists. The loader could infer the project from the containing directory or tolerate the missing value. At minimum, it should not fall into a parser that is guaranteed to fail for normal JSONL.

Client information

<details> <summary>Client Information</summary>

Run gemini to enter the interactive CLI, then run the /about command.


╭─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
│                                                                                                                                                                                                                                                                                 │
│ About Gemini CLI                                                                                                                                                                                                                                                                │
│                                                                                                                                                                                                                                                                                 │
│ CLI Version                                                                                    0.42.0                                                                                                                                                                           │
│ Git Commit                                                                                     68e2196d5                                                                                                                                                                        │
│ Model                                                                                          Auto (Gemini 3)                                                                                                                                                                  │
│ Sandbox                                                                                        no sandbox                                                                                                                                                                       │
│ OS                                                                                             linux                                                                                                                                                                            │
│ Auth Method                                                                                    Signed in with Google                                                                                                                             │
│ Tier                                                                                           Gemini Code Assist in Google One AI Pro                                                                                                                                          │
│                                                                                                                                                                                                                                                                                 │
╰─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯
</details>

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