docs: strengthen governance PR follow-up

Author: QuantumMisaka

AGENTS.md

@@ -58,6 +58,19 @@ rules. Read the complete governance document before making or reviewing changes:
   compiler setup, or calculation-task skill unless the PR explicitly requires
   and justifies it.
 
+## Local Runtime Testing
+
+- Set `OMP_NUM_THREADS=1` for ABACUS runtime, integration, and MPI tests unless
+  a test explicitly requires another value.
+- Run MPI/runtime tests outside restricted sandboxes when process visibility,
+  sockets, or MPI launch behavior matters.
+- Treat OpenMPI `opal_ifinit: socket() failed errno=1` warnings from sandboxed
+  MPI-linked builds or runs as expected sandbox artifacts; rerun outside the
+  sandbox before treating them as ABACUS failures.
+- Do not relax existing tests or references merely to make a failure pass.
+  Update references only when the intended behavior changed and the PR explains
+  why.
+
 ## Review And Exception Flow
 
 - Mechanical blockers are enforced by hook and CI only for new files, changed

docs/developers_guide/agent_governance.md

@@ -141,6 +141,20 @@ Do not add a new container recipe, toolchain path, or agent-specific skill for
 calculation tasks as part of governance-only work. If a future PR needs one, it
 must explain why the existing Docker/toolchain paths are insufficient.
 
+## Local Runtime And MPI Testing
+
+Use `OMP_NUM_THREADS=1` as the default for ABACUS runtime, integration, and MPI
+tests unless the test explicitly requires another thread count. Agent sandboxes
+can interfere with process visibility, socket creation, and MPI launch behavior;
+when those details affect a result, rerun the command outside the restricted
+sandbox before diagnosing an ABACUS failure.
+
+OpenMPI `opal_ifinit: socket() failed errno=1` warnings from sandboxed
+MPI-linked builds or runs should be treated as sandbox artifacts first, not as
+project regressions. Do not relax existing integration tests or reference files
+just to make a failure pass. Update references only when the intended behavior
+changed and the PR explains why the new reference is correct.
+
 ## CLI Verification
 
 When a usable ABACUS executable is present, INPUT and command-line changes

source/Makefile.Objects

@@ -415,6 +415,8 @@ OBJS_NEIGHBOR=sltk_atom.o\
 
 OBJS_NEIGHBOR_SEARCH=neighbor_search.o\
     bin_manager.o\
+    page_allocator.o\
+    unitcell_lite.o\
 
 
 OBJS_ORBITAL=ORB_atomic.o\