A gateway that routes
Anthropic and Google behind one handler that picks per request. Coupling either as the other's tool works until you switch providers.
Read the codeThe cheaper alternative
Expose Gemini as a set of tools inside the Claude agent and let one provider drive the other.
Two trees: coupled, and routed
What it would have cost
Vendor lock-in, and a rewrite on the day you switch. That cost is invisible until it is total.
What the decision bought
One handler, per-request routing, and a fallback path when a provider fails.
Where it lives
OurStoryTime, /api/ai/*