Session Preserve — durable, verifiable Codex session preservation, now multi-provider

[davidqyc]

Update: the project I originally posted here as codex-preserve has grown into Session Preserve v0.2.0.

The Codex use case is still the same: take an already-persisted local Codex session, create an independent readable preservation package outside Codex, and verify that package later.

It now uses one schema-3 package format across:

• OpenAI Codex
• Claude Code
• Kimi Code
• ZCode

Repo: https://github.com/davidqyc/session-preserve
PyPI: https://pypi.org/project/session-preserve/

Install:

python -m pip install session-preserve

For Codex:

session-preserve export codex \
  --session-id <uuid> \
  --output-dir ./exports

session-preserve verify ./exports/<package-dir>

Schema 3.0 uses provider-neutral member names such as:

conversation.md
export.receipt.json
package.manifest.json

so the localization question in my original post is now resolved.

The integrity claim remains deliberately narrow: verification checks the files attested by the package manifest against their recorded sizes and SHA-256 values. It does not prove authenticity or authorship, and a coordinated rewrite of both a payload and its manifest can still verify.

It is also still not codex archive, not a restore/import tool, and not a sync service. Source sessions are read-only.

The old codex-preserve 0.1.3 release remains available, and Session Preserve continues to verify legacy schema 2.1 / 2.2 packages.

This is an independent, unofficial project and is not affiliated with or endorsed by OpenAI.