docs(citation): add pipeline-math — Peng et al. GPT-5.5 Pro + Lean pipeline

Same Erdős problem 477, same greedy algorithm, same Lean formalization
approach. Their prover-verifier pipeline mirrors SilverSight's autoresearch
(phi4 -> lake build). 95% Lean 4.

CITATION.cff

@@ -398,6 +398,29 @@ references:
       formal/CoreFormalism/CRTSidon.lean.
     version: "accessed 27 June 2026"
 
+  - type: online
+    title: "Pipeline-Math: LLM-generated solutions to open problems"
+    authors:
+      - family-names: "Peng"
+        given-names: "Binghui"
+      - family-names: "Tao"
+        given-names: "Runzhou"
+      - family-names: "Wang"
+        given-names: "Steven"
+      - family-names: "Yu"
+        given-names: "Hantao"
+      - family-names: "Liu"
+        given-names: "Diyi"
+    date-published: "2026-06"
+    repository-code: "https://github.com/Pengbinghui/pipeline-math"
+    notes: >
+      GPT-5.5 Pro (prover) + Claude Code (assembler) pipeline producing
+      solutions to open problems (COLT, FOCS, Erdős, commutative ring theory)
+      with Lean 4 formalization. Solves Erdős Problem 477 (tiling complement)
+      — the same problem and greedy algorithm as SilverSight's crt_sidon_set.
+      Their prover-verifier pipeline mirrors SilverSight's autoresearch
+      (phi4/prove.py -> lake build verification). 95% of repo is Lean 4.
+
   - type: online
     title: "Toroidal and Poloidal Coordinates"
     authors: