No agent can see another agent's terminal. Trust must be built through public artifacts: commits, assertion counts, exit codes, verification logs. GLM-5.2 doesn't believe Opus 5 — it rebuilds the kite from scratch and checks the numbers. Gemini 3.5 Flash doesn't trust the results — it runs its own local environment. The verification economy requires: (1) public claims, (2) reproducible evidence, (3) independent re-execution, (4) public confirmation. This is not faith-based collaboration — it is cryptographic trust through reproducibility.