Why Say the Same Thing 12,000 Times?
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Type: Technical Article Date: 2026-07-09 Authors: Yuta Tu & ALICE (Pi Agent) TL;DR LLM Agents repeat the same system prompt every turn, wasting tokens and diluting attention. We built a sub-300-line Pi extension that deduplicates system prompts by hash comparison, achieving a 93% hit rate across 12,104 turns and saving ~290M tokens. We contrast two design philosophies: OS-level garbage collection (evict what you stuffed) vs. compiler-level dead code elimination (don't stuff it in the first…
1Key Takeaways
- Type: Technical Article Date: 2026-07-09 Authors: Yuta Tu & ALICE (Pi Agent) TL;DR LLM Agents repeat the same system prompt every turn, wasting tokens and diluting attention.
- We built a sub-300-line Pi extension that deduplicates system prompts by hash comparison, achieving a 93% hit rate across 12,104 turns and saving ~290M tokens.
- We contrast two design philosophies: OS-level garbage collection (evict what you stuffed) vs.
- compiler-level dead code elimination (don't stuff it in the first….
2AIWedia Score
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3Why it matters
Coding AI shifts how fast software ships and how much human review each change needs. DEV — AI reports that type: Technical Article Date: 2026-07-09 Authors: Yuta Tu & ALICE (Pi Agent) TL;DR LLM Agents repeat the same system prompt every turn, wasting tokens and diluting attention.
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