Sessionfold 0.1.0a1

Sessionfold 0.1.0a1

This started when my 20-day-old 1 TB Mac reached 80 MB of free space. I blamed
the healthcare datasets I was working with, but the real culprit was about 566
GiB of Codex session JSONL. My honest reaction was, "what the shit?" Many of
those files contained the same screenshots repeated through compaction and
related sessions.

Sessionfold helps recover disk space from large Codex and Claude Code history
files. It finds repeated inline screenshots, stores each unique image once, and
keeps enough information to restore the original JSONL file byte for byte.

This first alpha includes:

• read-only scanning and duplicate estimates;
• streaming archives with a shared SHA-256 content store;
• verification without creating a source-sized temporary file;
• byte-exact restore to a new path;
• an explicitly confirmed reclaim command that rechecks the archive and source;
• optional Codex and Claude Code plugin bundles.

The tool has no telemetry or network client. Source removal is off by default.
This is an alpha because agent transcript formats can change and independent
user testing has not started yet.