diff --git a/THREADS.md b/THREADS.md
index b7c5bde..b3912bc 100644
--- a/THREADS.md
+++ b/THREADS.md
@@ -10925,3 +10925,54 @@ anchors are your GLB), but the tooling is now waiting, not TODO.
     note: `attach({at, wind})` pre-flies all four corners, so a corner that arrived down is failed
     after the pre-fly rather than during it — measured difference cb1 0.80 vs 0.83 kN, identical
     verdict, and I will take the broken set into `attach` the moment anyone wants it exact.
+
+[I] 2026-07-25 — **SPRINT 18 PART 1 INTEGRATION (main): THE F KEY NEVER WORKED, AND THE WEEK NOW
+    COSTS YOU FOR SAYING NO.** All four builder lanes merged; selftest **574/0/0** on the
+    integrated tree — the exact per-lane sum (522 baseline + A 17 + C 11 + E 11 + B 13),
+    verified in the browser. Zero code conflicts across four lanes for the third sprint
+    running; the only conflicts were THREADS append regions, keep-both.
+
+    ⚖️ **JOHN'S RULING IS LIVE:** `REP.STOOD_UP = −0.5`, the exact mirror of a clean night,
+    recorded at `take()` and charged at dawn in `settle()` (charging at take would drop
+    standing between the board and the sheet, and the fee is priced off standing — the
+    quote-vs-settle lie one card earlier). The offer card says *"the Hendersons are
+    expecting you · −½★ standing"* BEFORE the choice; the invoice carries OFF THE BOARD
+    after it. Two callouts and no booked job reads free in words, behind a vacuity guard.
+
+    🧵 **THE SPRINT'S FINDING, and it is five sprints old: `setFabric` was never called by
+    the shipped game.** Its one call site is `RiggingSession.commit(rig)`, which the real
+    Enter path never reaches — the UI called `onCommit(ids, hw, tension)` and `rigSail` went
+    straight to `attach()`. So the sim flew the WATERPROOF MEMBRANE at full wind load in
+    every playtest ever run, while the prep panel, the SCORE IT card, the HUD row, the
+    invoice and every audit number said shade cloth. B found it hunting D's two-harness
+    disagreement; the lying harness was the GAME. Three harnesses now agree to two decimals
+    on the wildnight's pinned recipe (0/4 lost, garden 63.5) and D's cold play is vindicated
+    as a real bug found by hand. **Consequence nobody may forget: every balance number in
+    this repo was tuned on a fabric the game never flew, in the easier direction. D re-flies
+    the week; nothing gets re-tuned off a pre-fix number.**
+
+    **Two integrator applications, both disclosed.** (1) E's gate-5 hunks applied as
+    specified with A's blessing — the site names its own collateral target, the bake stops
+    clobbering it, and `validateSite` refuses duplicate structure ids and two priced
+    structures resolving to one key. (2) **A's filed instruction to delete the session
+    fallback on the fabric seam was NOT carried out, deliberately, and A may revert on
+    sight:** `rigSail` is exposed on the `SHADES` API, a third caller neither lane
+    enumerated, where a bench or a cold play can still pass three arguments — deleting the
+    fallback reintroduces the exact five-sprint bug through the one door the suite cannot
+    see (the wire lives inside `boot()` behind a WebGL context). One `??`, agrees with the
+    argument on every wired path.
+
+    ⚠️ **AND THE COUNT CAUGHT A LOST TEST, which is the whole reason this repo counts.** The
+    first integrated run read **573** against an expected 574. Rather than absorb one test
+    into a tolerance, the registrations were counted per file across all five trees: base 29
+    · lane/b 33 · merged 32 in `rigging.selftest.js`. Cause: lane/b was merged from a STALE
+    ref — B pushed `afef9ab` (gate 1's `commit(rig,{at})` mid-storm-clock pin, C's finding's
+    own regression guard) after the integrator's last fetch, and the later fetch updated the
+    ref while only lane/a was re-merged. Re-merged; 574 exactly. **The integrator's lesson,
+    earned: fetch immediately before EVERY merge, not once per sitting — a lane that is
+    "done" can still have a commit in flight, and a silently dropped test is invisible to a
+    green suite.**
+
+    **Next: D's second pass** — the knife (B's `cutAway` is live, tallied and printing on the
+    invoice; A authored the shipped emergency FOR it, the cowboy tied to the $180 carport
+    beam), then the re-flown week. Gate 6 is John's.