From b4d4844d31779a4438b11177ebf66a801c03c183 Mon Sep 17 00:00:00 2001
From: Dmitry Romanov <romanovda@gmail.com>
Date: Tue, 28 Jul 2026 14:29:53 -0400
Subject: [PATCH 1/3] Allow truth seeder to work with secondary particles

---
 src/algorithms/tracking/TrackParamTruthInit.cc | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/src/algorithms/tracking/TrackParamTruthInit.cc b/src/algorithms/tracking/TrackParamTruthInit.cc
index 1ff9845995..03d50faf2c 100644
--- a/src/algorithms/tracking/TrackParamTruthInit.cc
+++ b/src/algorithms/tracking/TrackParamTruthInit.cc
@@ -40,12 +40,6 @@ void TrackParamTruthInit::process(const Input& input, const Output& output) cons
   // Loop over input particles
   for (const auto& mcparticle : *mcparticles) {
 
-    // require generatorStatus == 1 for stable generated particles in HepMC3 and DDSim gun
-    if (mcparticle.getGeneratorStatus() != 1) {
-      trace("ignoring particle with generatorStatus = {}", mcparticle.getGeneratorStatus());
-      continue;
-    }
-
     // require close to interaction vertex
     auto v = mcparticle.getVertex();
     if (std::abs(v.x) * dd4hep::mm > m_cfg.maxVertexX ||

From 5f2aaf5d1dba194aeb38a11b9a11ce602ea4c802 Mon Sep 17 00:00:00 2001
From: epic-capybara <139920704+epic-capybara@users.noreply.github.com>
Date: Thu, 30 Jul 2026 12:58:36 -0400
Subject: [PATCH 2/3] Allow truth seeder to work with secondary particles (fix:
 iwyu) (#2814)

This PR applies the include-what-you-use fixes as suggested by
https://github.com/eic/EICrecon/actions/runs/30388662690.
Please merge this PR into the branch `pr/truth-init-accepts-all`
to resolve failures in PR #2797.

Auto-generated by [create-pull-request][1]

[1]: https://github.com/peter-evans/create-pull-request

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
---
 src/algorithms/tracking/TrackParamTruthInit.cc | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/algorithms/tracking/TrackParamTruthInit.cc b/src/algorithms/tracking/TrackParamTruthInit.cc
index 03d50faf2c..44d278cb26 100644
--- a/src/algorithms/tracking/TrackParamTruthInit.cc
+++ b/src/algorithms/tracking/TrackParamTruthInit.cc
@@ -13,13 +13,12 @@
 #include <edm4hep/Vector2f.h>
 #include <edm4hep/Vector3d.h>
 #include <edm4hep/Vector3f.h>
-#include <Eigen/Core>
 #include <cmath>
 #include <cstdlib>
-#include <gsl/pointers>
 #include <limits>
 #include <memory>
 #include <random>
+#include <tuple>
 
 #include "extensions/spdlog/SpdlogFormatters.h" // IWYU pragma: keep
 

From 0f53b6611eb779620539f379ffd83112d66f3290 Mon Sep 17 00:00:00 2001
From: Dmitry Kalinkin <dmitry.kalinkin@gmail.com>
Date: Wed, 5 Aug 2026 14:00:09 -0400
Subject: [PATCH 3/3] updated condition with explicit intent

---
 src/algorithms/tracking/TrackParamTruthInit.cc | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/algorithms/tracking/TrackParamTruthInit.cc b/src/algorithms/tracking/TrackParamTruthInit.cc
index 44d278cb26..35ab17917b 100644
--- a/src/algorithms/tracking/TrackParamTruthInit.cc
+++ b/src/algorithms/tracking/TrackParamTruthInit.cc
@@ -39,6 +39,14 @@ void TrackParamTruthInit::process(const Input& input, const Output& output) cons
   // Loop over input particles
   for (const auto& mcparticle : *mcparticles) {
 
+    // accept generator-stable particles (HepMC3/DDSim gun) or Geant4-produced
+    // secondaries; reject generator intermediates (partons, resonances, beams)
+    if (!(mcparticle.getGeneratorStatus() == 1 || mcparticle.getSimulatorStatus() != 0)) {
+      trace("ignoring particle with generatorStatus = {}, simulatorStatus = {}",
+            mcparticle.getGeneratorStatus(), mcparticle.getSimulatorStatus());
+      continue;
+    }
+
     // require close to interaction vertex
     auto v = mcparticle.getVertex();
     if (std::abs(v.x) * dd4hep::mm > m_cfg.maxVertexX ||