@parkerbrowndev hooks Jev before tool calls in a Pi/Harbor setup with Haiku; reports better safety, half the tokens, higher API $ from broken caching.

Parker Brown @parkerbrowndev

2026-10-19EN

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About this case

Agent experiment with video. Design: Haiku + Pi harness + Harbor eval, Jev before tool calls. Results: better safety/reliability, 1.5x API cost (prompt caching broken), half token cost, comparable speed; in-house frame generation noted. For people routing agent tool calls with Jev.

Original posthttps://x.com/parkerbrowndev/status/2112332326881653215

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