Halt + Staleness Collateral Haircut

Layers a feed-staleness, sequencer-downtime, and underlying-halt haircut on top of a base repo haircut for Robinhood Chain stock tokens posted as collateral. 46 percent of first-week stock-token transfers settled outside NYSE hours, and the docs name Chainlink staleness checks plus Arbitrum sequencer-uptime validation as required practice. Downstream of check_tokenized_collateral_eligibility and calculate_repo_haircut in the collateral-haircut chain. Returns a liquidation-risk classification: normal, elevated, or blocked. Zero network, zero PII.

Tool URL: https://ainumbers.co/chaingraph/art-320-rhc-collateral-haircut.html AP2/Policy Mandate export: yes