step3: Config C Kaggle PASS, 0.05 lock pending

docs/PROGRESS.md

@@ -33,6 +33,7 @@ Har kaam ke baad yaha entry karo taaki yaad rahe kab kya kiya tha.
 - [x] 2026-09-17: Kaggle session-reset error (no repo after restart) -> `docs/KAGGLE_RUN.md` session-proof cell guide banaya, HF push
 - [x] 2026-09-17: Step 3 toy test Kaggle PASS (A 0.01: max 0.283 loss 4.9070 / B 0.02: max 0.266 loss 4.9218, dono PASS), TEST_REPORT entry, HF push — balance_weight lock approval pending
 - [x] 2026-09-17: improve approved — toy me Config C (0.05, 50 steps) joda, HF push — Kaggle re-run pending
+- [x] 2026-09-17: Step 3 Config C Kaggle PASS (max 0.199, sab experts ≥5.5%, loss 4.55 — A/B se best), TEST_REPORT entry, HF push — 0.05 lock approval pending
 - [x] 2026-09-17: `docs/ROADMAP_SCRATCH.md` banaya (Step 0-10, status: 0-2 done, agla Step 3 toy-Kaggle), HF push
 - [ ] TODO: toy router-balance test (Kaggle), FINAL tokenizer (500k lines wait), dense baseline
 

docs/TEST_REPORT.md

@@ -56,6 +56,18 @@ Har test ke baad yaha entry hogi: date, env, command, result, verdict.
 - Verdict: PASS — balance_weight lock user-approval pending (candidate: 0.02)
 - Screenshot verified (user-provided)
 
+## 2026-09-17 — Step 3 Config C improve attempt (Kaggle, PASS)
+- Env: Kaggle notebook, CPU
+- Cmd: `python model/scripts/toy_router_test.py` (A 0.01/20 steps, B 0.02/20, C 0.05/50 steps)
+- Result:
+  - A: loss 5.2516→4.9070, max_share 0.283 → PASS
+  - B: loss 5.2706→4.9218, max_share 0.266 → PASS
+  - C: loss 5.3277→4.5542, max_share 0.199, usage [0.199,0.131,0.139,0.086,0.086,0.105,0.055,0.199] → PASS (sabse balanced — koi expert idle nahi, sab ≥5.5%)
+- Note: C ke steps zyada (50 vs 20) isliye loss-compare seedha nahi; balance-sudhar me weight + steps dono ka haath. Phir bhi C dono metric me best.
+- Script verdict: locked C (0.05)
+- Verdict: PASS — config lock (0.05) user-approval pending
+- Screenshot verified (user-provided)
+
 ## Template (next test ke liye)
 ```
 ## YYYY-MM-DD — <test naam> (<env>)