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Agents / GPT-6 Astra

Astra beats Portal

Astra beats Portal

About this project

GPT-6 Astra finished Portal in ~23h 43m. Controller, SourcePauseTool patch, setup guide, and session log are open source. You need your own copy of Portal.

CodexMCPSourcePauseToolPortal

Published prompt

Prompt excerpt

This is a published excerpt or workflow note. Open the source for the complete context.

After the initial goal, the only additional instruction was to leave the credits rolling. The agent sees screenshots, player position, and camera angles, chooses inputs, then lets the game advance.

The repo describes the goal and control loop; it is not a copy-paste spell.

Creator & source notes

Author-reported 23h43m, 3,336 tool calls, list-price ~$571; run used a $200 Codex sub

Needs the tested Windows setup and a licensed Portal copy.

Agents

Greg Isenberg's 9 agent prompts

Nine published workflow prompts: bill negotiation, competitor watch, nightly QA, browser operator. A prompt pack, not one demo.