diff --git a/bibliography/pyautomemory.bib b/bibliography/pyautomemory.bib
index 4225106..951c8fa 100644
--- a/bibliography/pyautomemory.bib
+++ b/bibliography/pyautomemory.bib
@@ -16119,3 +16119,10 @@ @article{Hall1952
   volume = {87},
   year = {1952}
 }
+
+@unpublished{Vincken2026,
+  author = {{Euclid Collaboration} and Vincken, S. H. and others},
+  title = {{TODO -- Euclid DR1 strong lens finding network comparison}},
+  year = {2026},
+  note = {In preparation; arXiv ID, DOI and full author list TODO once public}
+}
diff --git a/wiki/lensing/log.md b/wiki/lensing/log.md
index fa2963e..4a59946 100755
--- a/wiki/lensing/log.md
+++ b/wiki/lensing/log.md
@@ -195,3 +195,23 @@ surface-brightness modelling), both as source entries in
 
 Dropped only the H0pe SN-host paper (2510.20561): Galan-led but Herculens use
 unconfirmed.
+
+## 2026-08-20 — Vincken 2026 placeholder; dolphin logged retroactively
+
+**By:** Claude (Opus 5, PyAutoLabs `vincken-2026-bib-placeholder` session,
+PyAutoMemory#39).
+
+- **`Vincken2026` — placeholder, not a verified entry.** Euclid DR1 strong lens
+  finding network comparison (Euclid Collaboration: Vincken et al., in
+  preparation). Recorded **generically** — author/year/topic only, no title or
+  author list — because this repo is public and the only available copy is an
+  unpublished Euclid Consortium draft. Added to `bibliography/pyautomemory.bib`
+  as `@unpublished` and to `sources/lens-finding.md` beside the Q1 Discovery
+  Engine A/B/C entries, with an explicit "no claim verified" guard.
+  **Pending:** replace the TODO title/reference with verified metadata (title,
+  arXiv ID, DOI, author list) and real `**Supports:**` claims once the paper is
+  on arXiv.
+- **`Shajib2025dolphin` — logged retroactively.** The dolphin automated
+  forward-modelling pipeline (arXiv:2503.22657) was added to the bibliography
+  and `sources/lens-modeling-methods.md` during the #34/#36 wiki-hygiene pass
+  but never recorded here. No content change; this line closes the log gap.
diff --git a/wiki/lensing/sources/lens-finding.md b/wiki/lensing/sources/lens-finding.md
index cd01d11..7bd863d 100755
--- a/wiki/lensing/sources/lens-finding.md
+++ b/wiki/lensing/sources/lens-finding.md
@@ -294,6 +294,21 @@ status: drafted
 **Do not use for:**
 - The targeted high-velocity-dispersion visual search.
 
+## Vincken 2026 — Euclid DR1 lens-finding network comparison
+
+**Canonical BibTeX key:** `Vincken2026`
+**Reference:** TODO — in preparation, not yet on arXiv. Refresh with the verified title, arXiv ID and DOI once the paper is public.
+**Concepts:** [[euclid-q1]], [[lens-finding]], [[deep-learning-lensing]]
+
+**Supports:**
+- Placeholder only — a citable canonical key for the Euclid DR1 strong lens finding network comparison. No claim has been verified against a public record.
+
+**Use when:**
+- You need a stable key to cite the DR1 network-comparison paper before it is public. Nothing more.
+
+**Do not use for:**
+- Any quantitative result, method detail or interpretation. The paper is an unpublished Euclid Consortium draft; replace this entry with verified claims once it is on arXiv.
+
 ## See also
 
 - [[lens-finding]]