`[2026-07-01]` **env.sh now PERSISTS the web Bifrost-bind vars (gitignored, local-only).** `ratatoskr-web`'s in-browser bind needs three server-held values; env.sh sources `provider.env` for the Heimdall key and exports `RATATOSKR_BIFROST_CONSUMER_KEY` + `RATATOSKR_PROVIDER_VISIBLE_HOST=10.100.10.50` + `RATATOSKR_AFFECT_READ_URL=:8392`. **The HS256 byte-match trap (re-hit + documented):** the bind's consumer key must equal the key the `:8392` combined provider validates against = `RATATOSKR_HEIMDALL_KEY` (provider.env, fp `45a0…`), NOT `WORLDTREE_API_KEY` (env.sh, fp `7c2f…`) — both are the SAME `ratatoskr` identity but DIFFERENT 40-char strings; signing with the wrong one → `bifrost.auth_rejected`. Single-sourced (env.sh sources provider.env) to avoid a rotation footgun; guarded with a stderr warning if provider.env is missing. [auto-memory: HS256-key-is-the-consumer-Heimdall-key-string]
