Card 59 — wired and certified in one pass; lessons from card 78 paid off 11/16

Feature 2 went from "computes correctly" to "wired and certified" in a single iteration — half the iterations feature 1 needed for the same ground. Two reasons, both worth understanding:

Reason 1 — the second traveler uses the first one's map. Feature 1 (Hoeffding) had to blaze the trail: discover every hand-off where a computed value could silently vanish (the #556 incident class), bump every exact-count tripwire, and learn — via its adversarial trial — that a forgotten bookkeeping test elsewhere (the "65 features" compat count) breaks the suite on deploy day. Today feature 2 simply walked the same 11 hand-off points in order, and proactively bumped the compat counts (66→67, 13→14) that the card-78 attacker had to catch after the fact. A lesson learned once, institutionalized.

Reason 2 — this feature lives in the shared machinery. Because "how long until price comes back?" reads only closing prices, iteration 07 plugged it into the standard 200-bar window record shared by 12 other features. Today that paid compound interest: the pipeline-wide certification tests — "no crystal ball" (causality), "same answer twice" (determinism) — sweep every column of that shared record across both markets. The moment the wiring landed, those sweeps were already exercising the new column. Certification came almost free; only the restart-continuity and stress-input drills needed explicit new lines.

The watchdog that turned red on purpose in iteration 07 is green again: the database blueprint, the engine's record, the feature catalogue, and the column documentation all agree on exactly 14 bar-close measurements. The rehearsal file written by the emergency spool now carries 92 columns and reads back perfectly in Python. All 43 test suites: green.

What's left: the decision record, the six typed commands (/hvghorizon:*), the full repo quality gate, the adversarial attacker/defender trial, and the pull request — stacked on top of feature 1's, so the human operator can review them in order.