Bug: /resume command shows incomplete session list

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Bug: /resume command shows incomplete session list

Problem:
The /resume command only displays a subset of available sessions because sessions-index.json is not being updated when sessions are
created/modified.

Evidence:

• history.jsonl contains 35 unique sessionIds for this project
• Actual .jsonl session files on disk: 28
• sessions-index.json entries: only 10
• 18 sessions are invisible to /resume

Root cause:
The session index file (~/.claude/projects/<project>/sessions-index.json) is out of sync with actual session files. New sessions are not being
added to the index.

Reproduction:

1. Work on a project over multiple sessions
2. Run /resume
3. Compare listed sessions vs actual .jsonl files in the project directory
4. Many sessions will be missing from the list

Workaround:
Resume by direct session ID: claude --resume <session-id>

Suggested fix:
Either rebuild the index from .jsonl files when /resume is called, or remove the index dependency entirely.

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Environment Info

• Platform: darwin
• Terminal: vscode
• Version: 2.1.31
• Feedback ID: 0a10576d-a947-470b-a522-5fddb28d3963

Errors

[{"error":"Error\n    at jb (/$bunfs/root/claude:42:1144)\n    at <anonymous> (/$bunfs/root/claude:47:10089)\n    at emit (node:events:92:22)\n    at endReadableNT (internal:streams/readable:861:50)\n    at processTicksAndRejections (native:7:39)\n    at request (/$bunfs/root/claude:49:2149)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-05T07:44:38.402Z"},{"error":"Error\n    at jb (/$bunfs/root/claude:42:1144)\n    at <anonymous> (/$bunfs/root/claude:47:10089)\n    at emit (node:events:92:22)\n    at endReadableNT (internal:streams/readable:861:50)\n    at processTicksAndRejections (native:7:39)\n    at request (/$bunfs/root/claude:49:2149)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-05T07:44:38.477Z"},{"error":"Error\n    at jb (/$bunfs/root/claude:42:1144)\n    at <anonymous> (/$bunfs/root/claude:47:10089)\n    at emit (node:events:92:22)\n    at endReadableNT (internal:streams/readable:861:50)\n    at processTicksAndRejections (native:7:39)\n    at request (/$bunfs/root/claude:49:2149)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-05T07:44:40.756Z"},{"error":"Error: EISDIR: illegal operation on a directory, read\n    at readFileSync (unknown)\n    at <anonymous> (/$bunfs/root/claude:12:742)\n    at d5 (/$bunfs/root/claude:11:40746)\n    at readFileSync (/$bunfs/root/claude:12:701)\n    at bPB (/$bunfs/root/claude:6124:17702)\n    at call (/$bunfs/root/claude:3564:2357)\n    at call (/$bunfs/root/claude:3560:8805)\n    at <anonymous> (/$bunfs/root/claude:3576:1604)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-05T08:04:27.026Z"},{"error":"Error: EISDIR: illegal operation on a directory, read\n    at readFileSync (unknown)\n    at <anonymous> (/$bunfs/root/claude:12:742)\n    at d5 (/$bunfs/root/claude:11:40746)\n    at readFileSync (/$bunfs/root/claude:12:701)\n    at bPB (/$bunfs/root/claude:6124:17702)\n    at call (/$bunfs/root/claude:3564:2357)\n    at call (/$bunfs/root/claude:3560:8805)\n    at <anonymous> (/$bunfs/root/claude:3576:1604)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-05T08:04:27.027Z"},{"error":"Error: EISDIR: illegal operation on a directory, read\n    at readFileSync (unknown)\n    at <anonymous> (/$bunfs/root/claude:12:742)\n    at d5 (/$bunfs/root/claude:11:40746)\n    at readFileSync (/$bunfs/root/claude:12:701)\n    at bPB (/$bunfs/root/claude:6124:17702)\n    at call (/$bunfs/root/claude:3564:2357)\n    at call (/$bunfs/root/claude:3560:8805)\n    at <anonymous> (/$bunfs/root/claude:3576:1604)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-05T08:04:27.027Z"},{"error":"Error: EISDIR: illegal operation on a directory, read\n    at readFileSync (unknown)\n    at <anonymous> (/$bunfs/root/claude:12:742)\n    at d5 (/$bunfs/root/claude:11:40746)\n    at readFileSync (/$bunfs/root/claude:12:701)\n    at bPB (/$bunfs/root/claude:6124:17702)\n    at call (/$bunfs/root/claude:3564:2357)\n    at call (/$bunfs/root/claude:3560:8805)\n    at <anonymous> (/$bunfs/root/claude:3576:1604)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-05T08:04:27.028Z"}]