Release v3.3.1

Fixed

• Cratis corpus agents inherit the model selected for the session instead of overriding it with outdated Claude model IDs, in every harness. (#396)
• Pi no longer offers two delegation tools when another extension already provides Agent (such as pi-subagents, which reads the same .pi/agents): the Cratis subagent tool stands down for that session and says so once. Without such a tool it works as before.