Sessions should survive project directory renames

Problem

Sessions are keyed by the absolute path of the project directory. If a user renames or moves their project folder, all previous sessions become unresumable — claude --resume <session-id> cannot find them.

Reproduction

1. Start a Claude Code session in /path/to/my-project, give it a name
2. Rename the directory: mv my-project my-project-v2
3. cd my-project-v2 && claude --resume <session-id> → session not found

The session .jsonl files remain in ~/.claude/projects/-path-to-my-project/ but Claude Code now looks in ~/.claude/projects/-path-to-my-project-v2/ and finds nothing.

Expected behavior

Sessions should be recoverable after a project rename/move. Possible approaches:

• Allow --resume <session-id> to search across all projects, not just the current directory
• Provide a way to migrate sessions to a new project path
• Key sessions by something more stable than the absolute path (e.g., git remote URL or a project UUID)

Current workaround

Create a symlink from the old path to the new one, then resume from the old path. Works but fragile.

Environment

• Claude Code 2.1.81
• macOS

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