Show HN: Ctx – a /resume that works across Claude Code and Codex

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Article

TL;DR

Ctx lets developers resume and transfer agent sessions between Claude Code and Codex via a shared context layer.

Key Takeaways

  • Normalizes session handoff across harnesses; useful when switching providers mid-task
  • No prompt caching benefit when crossing providers — cache is model and provider specific
  • Highlights total lack of shared session schema standard across competing agent tools

Discussion

Top comments:

  • [realdimas]: Neither Anthropic nor OpenAI expose raw thinking tokens; first-party CLIs hold opacity by design
  • [buremba]: Prompt caching won’t work cross-model so this approach may not beat a simple PR review
  • [tuo-lei]: Session state portability is the real unsolved problem across all agent tools today
  • [LeoPanthera]: Many developers never use /resume at all — each task starts fresh by default

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