Temporal interval/ordering/elapsed questions are now computed, not generated: SecureContext decomposes the question into events, retrieves and date-grounds each one, and does the arithmetic in code — rendered as a 'Temporal computation' block above the search Timeline. LLMs are unreliable at date math; this removes them from that job entirely. Fails closed (no block rather than a fabricated date). E2E-verified with real terminal agents. Details in CHANGELOG.md.