diff --git a/F-progress.md b/F-progress.md
index f13bc96..c5e60f8 100644
--- a/F-progress.md
+++ b/F-progress.md
@@ -15,7 +15,8 @@ Full tracking in [`LANE_F_NOTES §10`](docs/LANES/LANE_F_NOTES.md).
 | **archive R3/R4 instruction claims** (F4) | ✅ Added "SUPERSEDED by R5" banner to `ROUND3_INSTRUCTIONS.md` + `ROUND4_INSTRUCTIONS.md`. |
 | **v2 flags table** (F4) | ✅ Scaffolded in LANE_F_NOTES §10 (`?plansrc=osm` A, `?winmap=1` B, `?dig=1` C, `?roster=stream` D) — all pending owning-lane specs. |
 | **F1 tag v1.1** | ✅ **TAGGED.** C1 (`aa9c140`: record_crate fixed + counter_till re-map) + E1 (`c522464`: 6 hero props baked 288k→48k, ≤8k each, live on depot) landed. Verified: depot serves baked props (counter_till 7999, drinks_fridge 8000, listening_booth 7986 tris ≤8k), C's `glb.js` maps them, record/opshop interiors render the **counter_till GLB** with keeper stand pose working + no double till, bins upgraded. Re-captured the 2 interior tour shots (fresh chromium → baked props). qa GREEN. `git tag v1.1` (local). |
-| **F2 wire v2 seams** | ⏳ pending lanes documenting call-sites (esp. C's `?dig=1` interior-mode input seam — real work, F owns the mode machine). |
+| **F2 wire `?dig=1`** | ✅ **DONE + verified.** C shipped `dig.js` + the flag but left the in-game input/mode hook to F (LANE_C_NOTES §C2). Wired the consumer pattern into `interior_mode.js` (F-owned): aim at a `userData.kind==='bin'` fitting + press **E** → `createDig`/`dig.open` (per-bin seed via `binSeed(shop.seed,pos)`); the dig owns the frame (render `dig.scene`, no interior walk); WALK OUT / Esc closes → back to the room. Shell seam (`index.html`): `?dig=1` → `dig:` opt; `procity:digOpen` releases pointer-lock (riffle is cursor-driven); unlock→leaveShop guard reads `interiorMode.digActive` so opening a bin ≠ leaving. **Fresh-chromium smoke:** E opens riffle (seeded sleeves + prices render), WALK OUT closes to interior, **leak-free** (steady-state geo/tex flat over 3 cycles), **0 console errors**. Flag off ⇒ no listener/no dig ⇒ byte-identical to v1. |
+| **F2 — other v2 seams** | B `?winmap` / D `?roster=stream` are self-contained (no shell input hook needed); smoked clean (boot, 0 errors, budget OK). A `?plansrc` not taken. |
 | **F3 v2 QA harness** | ⏳ determinism gate (first-interior-hash per seed) · flags-off regression check (v2-prime-law enforcement) · v2 smoke → qa.sh warn-gate. Build as flags land. |
 
 Base state: v1.0 (`2698b40`), `qa.sh --strict` GREEN 4/4, tree clean.
diff --git a/docs/shots/laneF/dig_closed.png b/docs/shots/laneF/dig_closed.png
new file mode 100644
index 0000000..aa77495
Binary files /dev/null and b/docs/shots/laneF/dig_closed.png differ
diff --git a/docs/shots/laneF/dig_open.png b/docs/shots/laneF/dig_open.png
new file mode 100644
index 0000000..75cfa95
Binary files /dev/null and b/docs/shots/laneF/dig_open.png differ
diff --git a/web/index.html b/web/index.html
index 9cb1d87..728aeaf 100644
--- a/web/index.html
+++ b/web/index.html
@@ -134,7 +134,13 @@ const minimap = createMinimap(plan);
 const fleet = NOASSETS ? null : loadPedFleet('models/peds/');
 if (!NOASSETS) preloadManifest();   // prime the manifest so the first interior can upgrade its fittings
 // [Lane F integration] interior bridge — owns the 'interior' branch (Lane C buildInterior + Lane D keeper)
-const interiorMode = createInteriorMode({ THREE, renderer, camera, plan, fleet, useGLB: !NOASSETS });
+// [Lane F §F2] ?dig=1 enables Lane C's crate-riffle inside record interiors (v2). Off ⇒ byte-identical to v1.
+const DIG_ON = params.has('dig') && params.get('dig') !== '0';
+const interiorMode = createInteriorMode({ THREE, renderer, camera, plan, fleet, useGLB: !NOASSETS, dig: DIG_ON });
+// [Lane F §F2] the riffle is cursor-driven (DOM buttons + click-a-sleeve), so release pointer-lock while it's
+// open and re-lock (on click) after. digActive gates the unlock→leaveShop guard below so opening a bin
+// doesn't read as "walked out of the shop".
+window.addEventListener('procity:digOpen', () => player.unlock());
 // [Lane F integration] street pedestrians (Lane D). graph = plan.streets directly; with the rig fleet the
 // near tier shares GLB meshes (cheap). `?pop=` tunable. setTimeOfDay/update in the street loop.
 const citizens = new CitizenSim({ renderer, scene, camera, citySeed: plan.citySeed, graph: plan.streets, fleet });
@@ -198,9 +204,9 @@ addEventListener('blur', () => keys.clear());
 const startPanel = document.getElementById('pc-start');
 document.getElementById('pc-startseed').textContent = `${plan.name} · seed ${plan.citySeed}`;
 document.getElementById('pc-go').addEventListener('click', () => { startPanel.style.display = 'none'; player.lock(); });
-player.controls.addEventListener('unlock', () => { keys.clear(); if (MODE === 'interior') leaveShop(); });  // [Lane F] Esc leaves the shop
+player.controls.addEventListener('unlock', () => { keys.clear(); if (MODE === 'interior' && !interiorMode.digActive) leaveShop(); });  // [Lane F] Esc leaves the shop — but not when the unlock is us opening a dig (§F2)
 // click the world to (re)grab the pointer when walking
-canvas.addEventListener('click', () => { if (MODE === 'street' && !player.isLocked) player.lock(); });
+canvas.addEventListener('click', () => { if (!player.isLocked && !interiorMode.digActive && (MODE === 'street' || MODE === 'interior')) player.lock(); });  // [Lane F §F2] re-lock for interior walk after closing a dig
 
 addEventListener('resize', () => {
   camera.aspect = innerWidth / innerHeight; camera.updateProjectionMatrix();
diff --git a/web/js/world/interior_mode.js b/web/js/world/interior_mode.js
index c9c90f1..502f4c1 100644
--- a/web/js/world/interior_mode.js
+++ b/web/js/world/interior_mode.js
@@ -17,6 +17,7 @@
 
 import { buildInterior } from '../interiors/interiors.js';
 import { KeeperManager } from '../citizens/keepers.js';   // Lane D — shopkeeper behind the counter
+import { createDig, binSeed } from '../interiors/dig.js';  // Lane C — crate-riffle (v2, gated on ?dig=1)
 
 const EYE = 1.6;        // interior eye height (matches interior_test.html; rooms tuned for it)
 const RADIUS = 0.30;    // player collision radius inside the room
@@ -24,7 +25,7 @@ const SPEED = 3.2;      // interior walk speed (matches the Lane C tester)
 const ARM_DIST = 2.0;   // must step this far from the door before the exit arms (spawn is ~1.5m away)
 const EXIT_DIST = 1.0;  // …then coming back within this distance leaves to the street
 
-export function createInteriorMode({ THREE, renderer, camera, plan, fleet = null, useGLB = false }) {
+export function createInteriorMode({ THREE, renderer, camera, plan, fleet = null, useGLB = false, dig: digEnabled = false }) {
   const scene = new THREE.Scene();
   scene.background = new THREE.Color('#0e0b07');
 
@@ -33,12 +34,56 @@ export function createInteriorMode({ THREE, renderer, camera, plan, fleet = null
   const keepers = new KeeperManager({ camera, citySeed: plan.citySeed, fleet });
 
   let current = null;      // active Lane C interior handle
+  let currentShop = null;  // the shop record for the active interior (dig per-bin seeding)
   let doorReturn = null;   // { x, y, z, ry } on the street to restore on exit
   let exitArmed = false;   // disarmed at spawn (spawn sits by the door); arms once player steps inside
+  let dig = null;          // [F2] Lane C crate-riffle instance, created lazily on first use (only if ?dig=1)
 
   const _fwd = new THREE.Vector3();
   const _right = new THREE.Vector3();
   const _up = new THREE.Vector3(0, 1, 0);
+  const _digRay = new THREE.Raycaster();
+
+  // [Lane F §F2] crate-riffle wiring (v2, ?dig=1). Lane C ships dig.js + gates the flag; F owns the
+  // in-game *input/mode* hook (its LANE_C_NOTES contract) — the same consumer pattern as Lane C's
+  // interior_test.html: aim at a record bin, press E → open the riffle, which owns the frame + cursor
+  // (pointer must be UNLOCKED — the shell handles that on procity:digOpen). Flag off ⇒ none of this runs.
+  function binUnderAim() {
+    if (!current) return null;
+    const bins = [];
+    current.group.traverse((o) => { if (o.userData && o.userData.kind === 'bin') bins.push(o); });
+    if (!bins.length) return null;
+    _digRay.setFromCamera({ x: 0, y: 0 }, camera);               // crosshair-centre ray
+    const hit = _digRay.intersectObjects(bins, true)[0];
+    if (hit && hit.distance < 3.2) {
+      let o = hit.object;
+      while (o && !(o.userData && o.userData.kind === 'bin')) o = o.parent;
+      return o;
+    }
+    return null;
+  }
+
+  function openDig(bin) {
+    if (!dig) dig = createDig(THREE, renderer);
+    if (dig.active) return;
+    const p = new THREE.Vector3(); bin.getWorldPosition(p);
+    const key = Math.round(p.x * 100) + '_' + Math.round(p.z * 100);   // stable per-bin key (deterministic pos)
+    dig.open({
+      seed: binSeed((currentShop && currentShop.seed) || 1, key), count: 16,
+      shopName: (current && current.recipe && current.recipe.label) || (currentShop && currentShop.name),
+      shop: currentShop,
+      onClose: () => window.dispatchEvent(new CustomEvent('procity:digClose')),
+    });
+    window.dispatchEvent(new CustomEvent('procity:digOpen'));   // shell releases pointer-lock for the cursor
+  }
+
+  if (digEnabled) {
+    addEventListener('keydown', (e) => {
+      if (e.code !== 'KeyE' || !current || (dig && dig.active)) return;
+      const bin = binUnderAim();
+      if (bin) openDig(bin);
+    });
+  }
 
   // a small unobtrusive banner (F-owned; the street HUD is hidden in interior mode)
   const banner = document.createElement('div');
@@ -73,6 +118,7 @@ export function createInteriorMode({ THREE, renderer, camera, plan, fleet = null
   function enter(shop, name) {
     if (current) exit();   // never stack interiors
     current = buildInterior(shop, THREE, { useGLB });   // [Lane F §3.4] depot GLB fittings when assets are on
+    currentShop = shop;
     scene.add(current.group);
     // Lane D keeper at the counter — Lane C tags the stand pose on the counter interactable
     const counter = current.places.find((p) => p.userData && p.userData.keeperStand);
@@ -84,7 +130,10 @@ export function createInteriorMode({ THREE, renderer, camera, plan, fleet = null
     camera.position.set(current.spawn.x, EYE, current.spawn.z);
     camera.rotation.set(0, current.spawn.ry, 0, 'YXZ');   // PointerLockControls re-reads this on next mouse move
     exitArmed = false;
-    banner.textContent = `🚪 ${name || shop.name || 'shop'} — walk out the door or press Esc to leave`;
+    let hasBins = false;
+    if (digEnabled) current.group.traverse((o) => { if (o.userData && o.userData.kind === 'bin') hasBins = true; });
+    banner.textContent = `🚪 ${name || shop.name || 'shop'} — walk out the door or press Esc to leave`
+      + (hasBins ? ' · E: riffle a record bin' : '');
     banner.style.display = 'block';
     return current;
   }
@@ -93,6 +142,14 @@ export function createInteriorMode({ THREE, renderer, camera, plan, fleet = null
   // (the shell then calls exit() + setMode('street') — update never disposes on its own).
   function update(dt, keys) {
     if (!current) return false;
+    // [F2] riffling: the dig owns the whole frame (its own scene/camera + cursor input). No interior
+    // walk, no exit check — the player is "in the crate" until they close it (Esc / WALK OUT button).
+    if (dig && dig.active) {
+      if (dig.update) dig.update(dt);
+      renderer.autoClear = true;
+      renderer.render(dig.scene, dig.camera);
+      return false;
+    }
     const f = (keys.has('KeyW') || keys.has('ArrowUp') ? 1 : 0) - (keys.has('KeyS') || keys.has('ArrowDown') ? 1 : 0);
     const s = (keys.has('KeyD') || keys.has('ArrowRight') ? 1 : 0) - (keys.has('KeyA') || keys.has('ArrowLeft') ? 1 : 0);
     if (f || s) {
@@ -120,9 +177,11 @@ export function createInteriorMode({ THREE, renderer, camera, plan, fleet = null
   // exit: dispose the room (frees GPU + removes group), restore the player to the street door.
   function exit() {
     if (!current) return;
+    if (dig && dig.active) dig.close();   // [F2] close an open riffle before leaving (frees its per-open GPU)
     keepers.disposeAll();   // Lane D: free the keeper actor(s) before the room
     current.dispose();
     current = null;
+    currentShop = null;
     banner.style.display = 'none';
     if (doorReturn) {
       camera.position.set(doorReturn.x, doorReturn.y, doorReturn.z);
@@ -138,5 +197,6 @@ export function createInteriorMode({ THREE, renderer, camera, plan, fleet = null
     keepers,
     get active() { return !!current; },
     get current() { return current; },
+    get digActive() { return !!(dig && dig.active); },   // [F2] shell reads this to keep pointer-lock/Esc sane while riffling
   };
 }