GPT-6 Astra's experimental compaction in Codex saves notes across context windows, off by default
TheMoonMidas · x · 2026-09-05
Daniel Mac8 reveals a new experimental compaction mechanism for GPT-6 Astra in Codex, currently off by default and requiring manual enablement via a prompt.
Once enabled, Astra can:
- Save notes across context windows, carrying memory forward
- Search earlier context windows, including both messages and tool calls
According to the author, this makes Astra behave less like an amnesiac and makes the context window feel massively larger.
More from coding & agent
- Slack's first employee: living specs as source of truth, AI agents maintain the docs — josh_wills · 2026-10-21
- GitHub Copilot's HydraFusion Orchestrates Multiple Models Per Task — WirelessLife · 2026-10-21
- Nous Research's Hermes now launches Cua Spaces for computer-use agents — alexcovo_eth · 2026-10-21
- Headlong from Laude's Slingshots batch is a microharness for persistent agents — lateinteraction · 2026-10-21
- Laude Institute's Slingshots Four ships 14 open-source projects on agent harnesses and open models — lateinteraction · 2026-10-21
- Skills vs MCP vs RAG vs Memory: the four knowledge layers production agents need — MaryamMiradi · 2026-10-21