Astra in Codex: New Context Management Method for Full Context Windows

X postGabriel ChuaAnnouncement

Gabriel Chua introduces Astra, a feature enabling Codex to retain and retrieve details across context windows through persistent notes instead of repeatedly compressing conversation history into a single summary.

Key points

  1. Astra introduces a new approach to context preservation and retrieval in Codex.
  2. It allows Codex to take and maintain notes across context windows when limits are reached.
  3. Accumulated details are kept without undergoing repeated compression into a single summary.
  4. Setup instructions are provided, with the option to screenshot them directly for Codex to configure.

Why it matters

Context window exhaustion in long programming sessions typically leads to loss of nuance due to aggressive summarisation. Retaining structured notes across boundaries helps coding assistants keep track of complex project details over time.

Analysis

The announcement targets a core pain point in LLM-assisted workflows: context degradation. By switching from continuous summarisation to cross-window note-taking, Codex aims to retain operational memory, though user responses highlight questions regarding token usage and its experimental status.

Original post

Gabriel Chua

@gabrielchua · 5 September 2026

"With Astra, we’re introducing a new way for Codex to preserve and retrieve context when the context window fills ... In Codex, Astra can keep notes across context windows, preserving accumulated details without repeatedly compressing them into a single summary..." See the next t.co/4MSt35OnRX

1.1k likes51 replies1.3k bookmarks220.1k views

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More posts in the thread (1)
  1. Instructions below, or appshot this and ask Codex to set it up! t.co/A8YKpKj87h
Selected replies (5)
  • @jlave_dev @gabrielchua it's still experimental for a reason. what drawbacks can we reasonably expect to run into by enabling? increased token use?
  • @rohit3a @gabrielchua Any downsides? Like is it more expensive,
  • @drnaqi @gabrielchua What do you gain by obfuscating the actual instructions for this inside of an image that we need to have an agent process? It's just set 𝚏𝚎𝚊𝚝𝚞𝚛𝚎𝚜.𝚌𝚘𝚗𝚝𝚎𝚡𝚝_𝚖𝚊𝚗𝚊𝚐𝚎𝚖𝚎𝚗𝚝.𝚎𝚡𝚙𝚎𝚛𝚒𝚖𝚎𝚗𝚝𝚊𝚕_𝚖𝚘𝚍𝚎 = 𝚝𝚛𝚞𝚎 right? Do you really need us burning more
  • @30Thrd @gabrielchua How is this different from memory?
  • @datmicahfr @gabrielchua Your context management sucks dude 5hr limit gone in under 10 turns within a single prompt in under 2 mins? BRUH t.co/p27kS1rot5

Mentioned links

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Summary generated by AI (Gemini 3.8 Flash, 27 September 2026). It may contain errors – the original source is authoritative.

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