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

71 points by dchu17

by realdimas

0 subcomment

Claude Code used to have a warning that toggling thinking within a conversation would decrease performance:
> Changing thinking mode mid-conversation will increase latency and may reduce quality. For best results, set this at the start of a session.
Neither OpenAI nor Anthropic exposes raw thinking tokens anymore.
Claude Code redacts thinking by default (you can opt in to get Haiku-produced summaries at best), and OpenAI returns encrypted reasoning items.
Either way, first-party CLIs hold opaque thinking blobs that can't be manipulated or ported between providers without dropping them. So cross-agent resume carries an inherent performance penalty: you keep the (visible) transcript but lose the reasoning.

by LeoPanthera

5 subcomments

I don't think I've ever /resumed a Claude Code session even once. What do people use that for? The way I use it is to make a change, maybe document the change, and then I'm done. New session.

by giancarlostoro

3 subcomments

Tooling like this is why I really want to build my own harness that can replace Claude Code, because I have been building a few different custom tools that would be nice as part of one single harness so I don't have to tweak configurations across all my different environments, projects and even OS' it gets tiresome, and Claude even has separate "memories" on different devices, making the experience even more inconsistent.

by ghm2180

0 subcomment

Interesting. What kind of context usage does it have when switching between the two providers? Like is it smart about using the # tokens when you go from claude -> codex or vice versa for a conversation?
How does ctx "normalize" things across providers in the context window ( e.g. tool/mcp calls, sub-agent results)?

by saadn92

0 subcomment

Very cool: did something similar here as well: https://github.com/saadnvd1/hydra

by buremba

2 subcomments

Since prompt caching won't work across different models, how is this approach better than dropping a PR for the other harnesses to review?

by t0mas88

2 subcomments

Have you considered making it possible to share a stream/context? As an export/import function.

by phoenixranger

0 subcomment

really interesting idea! will check it out. and thanks for making it local-first!

by ramon156

0 subcomment

Can we also get a /last ? 9/10 times i want to resume my last session. I know its only one extra tap, but still

by flowdesktech

0 subcomment

by tuo-lei

0 subcomment