From a3d4e5df19c0106847cc5847f6729f7a961f06a1 Mon Sep 17 00:00:00 2001
From: lkdvos <ldevos98@gmail.com>
Date: Tue, 29 Sep 2026 14:35:44 -0400
Subject: [PATCH] update VectorInterface compat to add v0.7

---
 Project.toml          |  2 +-
 docs/src/Changelog.md |  2 ++
 src/tensors/linalg.jl | 10 ++++++----
 3 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/Project.toml b/Project.toml
index 83093ea5b..784d3bfac 100644
--- a/Project.toml
+++ b/Project.toml
@@ -70,5 +70,5 @@ TensorKitSectors = "0.3.7"
 TensorOperations = "5.5.2, 5.6"
 TimerOutputs = "1"
 TupleTools = "1.5"
-VectorInterface = "0.6"
+VectorInterface = "0.6, 0.7"
 julia = "1.10"
diff --git a/docs/src/Changelog.md b/docs/src/Changelog.md
index e3baac971..64056075f 100644
--- a/docs/src/Changelog.md
+++ b/docs/src/Changelog.md
@@ -24,6 +24,8 @@ When releasing a new version, move the "Unreleased" changes to a new version sec
 
 ### Changed
 
+- Extend VectorInterface compat to include v0.7
+
 ### Deprecated
 
 ### Removed
diff --git a/src/tensors/linalg.jl b/src/tensors/linalg.jl
index 50a695654..b97a52304 100644
--- a/src/tensors/linalg.jl
+++ b/src/tensors/linalg.jl
@@ -326,11 +326,13 @@ function LinearAlgebra.tr(t::AbstractTensorMap)
     return s
 end
 
-# LinearAlgebra's BLAS wrappers do not accept `VectorInterface.One`/`Zero`, e.g.
-# `herk_wrapper!` (hit by `mul!(C, A, A')`) calls `isreal` on the scalars.
+# LinearAlgebra's BLAS wrappers do not accept `VectorInterface.One`/`Zero` before
+# VectorInterface v0.7, e.g. `herk_wrapper!` (hit by `mul!(C, A, A')`) calls `isreal`.
 _blasscalar(α::Number) = α
-_blasscalar(::One) = true
-_blasscalar(::Zero) = false
+@static if !(One <: Real)
+    _blasscalar(::One) = true
+    _blasscalar(::Zero) = false
+end
 
 # TensorMap multiplication
 function LinearAlgebra.mul!(