Technical Papers¶
Design papers and architecture documentation exploring PEtFiSh's engineering decisions.
- :material-layers-outline: **[System Prompt Architecture](sysprompt-design.md)**
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How PEtFiSh structures AI agent instructions with layered injection and on-demand loading.
- :material-currency-usd: **[Token Cost Engineering](compaction.md)**
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Reducing session costs by 20% through compaction frequency reduction and behavioral change.
- :material-gate: **[Companion Gateway Architecture](companion-gateway.md)**
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How the always-on interception layer works β design rationale, step evolution, and implementation mechanics.