Add design for session cost pill in the composer dock

Records what was verified against the live routerai API and the harness code: the provider reports usage.cost on every response, the harness discards it in mapUsage, and the cost can still be recovered by wrapping globalThis.fetch while session attribution rides the llm/stream seam.
2026-10-15 13:00:55 +03:00
commit 82f8b7baef
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+# Recon scratch: throwaway probes, extracted harness files, asar tooling.
+# Kept out of the repo: these are working notes, not deliverables.
+.recon/
+
+# Visual companion session files (brainstorm mockups).
+.superpowers/
+
+node_modules/