Minimal Self-Modifying Agent: 113-Word Prompt Harness

vivekhaldar · x · 2026-08-21

A developer shares an experiment for a minimal, self-modifying agent harness, built with just 186 lines of Python and a 113-word prompt. Designed as a "seed," the agent uses a bash exec tool and persists all state within a self/ directory. It reads and rewrites its own SELF.md (its "mind") and commits changes via Git to maintain memory, exploring the boundaries of minimal, evolving agent architectures.

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