Card 60 wired end-to-end — every lesson from cards 78 and 59 applied up front 11/16

The time-arrow detector got its plumbing — and the batch's accumulated playbook made it the cleanest wiring pass yet. Same eleven hand-off points as before (database blueprint, feature catalogue, two columnar serializers, the Python bridge, the master column list, the documentation, four exact-count tripwires), but this time every lesson the previous two features paid for was applied before any watchdog could complain:

• The compat bookkeeping counts (68 features / 15 bar-close) — the class of miss that card 78's attacker had to catch — bumped proactively.
• The catalogue's own header counts — the stale-metadata trap card 59's attacker found — kept honest (68 / 15).
• The narrative "all N columns" comments — the remnant class card 59's defender had to force a sweep for — updated in the same pass, everywhere.
• The final gate runs with the arrow feature flag pinned — closing the "a quarter of coverage silently skipped" gap the defender exposed (N5).

Result: 62 of 62 suite checks green on the first full run after wiring. The four-way schema contract agrees on exactly 15 bar-close measurements; the emergency-spool rehearsal file now carries 93 columns and reads back perfectly in Python; the round-trip test proves the new number (0.0625 as the test value) survives serialize→disk→read intact. The renamed column — …_meangap, honestly describing the signed mean-gap it actually is — is now what every surface speaks.

What remains for feature 3: the decision record (which will permanently document the two traps and the renaming), the six typed commands, the full quality gate, the adversarial trial, and the stacked pull request. And then a decision point: feature 4 (card 50) is contractually GATED on a human ruling about its formula that hasn't arrived — if it's still pending when card 60 ships, the loop's contract says: write the morning handoff and stop.