diff --git a/assertions/stoch_skip_witness.json b/assertions/stoch_skip_witness.json
new file mode 100644
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+++ b/assertions/stoch_skip_witness.json
@@ -0,0 +1,19 @@
+{
+  "id": "W-107-G",
+  "wave": 44,
+  "freeze_date": "2027-02-15",
+  "claim": "Stochastic time-skip variant of TTIHP27a degrades 3-suite averaged accuracy by <= 2.5 pp vs W43 INT2-activation baseline at identical weights, temperature 0.0, deterministic seeds.",
+  "skip_predicate": "cos_sim(act_t, act_{t-1}) >= 0.94 AND theta_phase == OFF",
+  "theta_freq_hz": 7,
+  "theta_period_ps": 142857143,
+  "theta_anchor": "f_gamma = phi^3 * pi / gamma (Sacred ROM)",
+  "bio_mapping": "hippocampal-theta-7Hz (dentate-gyrus pacemaker)",
+  "reuses_opcodes": ["0xE7 DFS", "0xEC DROWSY_RET", "0xEB SPEC_EXIT"],
+  "new_l1_opcodes": [],
+  "new_l2_microcode": ["L2_DG_THETA_SKIP_GATE"],
+  "falsifier": "If 3-suite averaged accuracy delta > 2.5 pp at freeze_date, W-107-G is REFUTED and W44 must be rolled back.",
+  "honest_lane": "R5",
+  "anchor": "phi^2 + phi^-2 = 3",
+  "doi": "10.5281/zenodo.19227877",
+  "silicon_vectors": ["S-185", "S-186", "S-187", "S-188", "S-189", "S-190", "S-191", "S-192"]
+}