Feature Request

Problem

When using multiple auth profiles (e.g. anthropic:manual as primary and anthropic:payg as fallback), there's currently no way to see:

1. Which auth profile was actually used for a given API call
2. Per-call cost (input/output tokens × model pricing)

Use Case

I have a free-tier Anthropic key (anthropic:manual) as primary and a pay-as-you-go key (anthropic:payg) as fallback. When the free tier is exhausted and fallback kicks in, I'd like to know:

• That the payg profile was used (not the free one)
• How much that specific call cost (rounded to the cent)

Current Behavior

session_status shows the current auth profile and cumulative token counts, but:

• No per-call breakdown
• No indication when a fallback profile was used vs primary
• No cost calculation based on model pricing

Proposed Solution

Options (any would help):

1. Per-call metadata in session transcript: Include authProfile and cost fields in the transcript/response metadata
2. Cost summary in session_status: Show cost breakdown per auth profile (e.g. "anthropic:manual: $0.00 | anthropic:payg: $0.42")
3. System event on fallback: Emit a system event when a fallback profile is used, so the agent can inform the user

Environment

• OpenClaw 2026.2.6-3
• Two Anthropic profiles (manual + payg) with Sonnet 4.6