diff --git a/.gitignore b/.gitignore
index 3776616d9..9f5babd9a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,4 +12,5 @@ vcs/*.smt2
 *.py.ion
 *.py.ion.core.st
 
-Strata.code-workspace
\ No newline at end of file
+Strata.code-workspace
+Build/
\ No newline at end of file
diff --git a/Strata/Languages/Laurel/ConstrainedTypeElim.lean b/Strata/Languages/Laurel/ConstrainedTypeElim.lean
index 7e86c374a..dce1a2eef 100644
--- a/Strata/Languages/Laurel/ConstrainedTypeElim.lean
+++ b/Strata/Languages/Laurel/ConstrainedTypeElim.lean
@@ -224,7 +224,7 @@ private def mkWitnessProc (ptMap : ConstrainedTypeMap) (ct : ConstrainedType) :
   { name := mkId s!"$witness_{ct.name.text}"
     inputs := []
     outputs := []
-    body := .Transparent ⟨.Block [witnessInit, assert] none, src⟩
+    body := .Opaque [] (some ⟨.Block [witnessInit, assert] none, src⟩) []
     preconditions := []
     isFunctional := false
     decreases := none }
diff --git a/Strata/Languages/Laurel/HeapParameterization.lean b/Strata/Languages/Laurel/HeapParameterization.lean
index fecaf5350..f68b93c03 100644
--- a/Strata/Languages/Laurel/HeapParameterization.lean
+++ b/Strata/Languages/Laurel/HeapParameterization.lean
@@ -315,7 +315,11 @@ where
               let isLast := idx == n - 1
               let s' ← recurse s (isLast && valueUsed)
               let rest' ← processStmts (idx + 1) rest
-              pure (s' :: rest')
+              -- Flatten blocks created by recurse so that
+              -- Declare targets remain in the enclosing scope.
+              match s'.val with
+              | .Block innerStmts (some "$inlineMe") => pure (innerStmts ++ rest')
+              | _ => pure (s' :: rest')
           termination_by sizeOf remaining
         let stmts' ← processStmts 0 stmts
         return ⟨ .Block stmts' label, source ⟩
@@ -389,7 +393,7 @@ where
 
       -- Create a block if necessary
       if suffixes.length > 0 then
-        return ⟨ StmtExpr.Block (newAssign :: suffixes) none, source ⟩
+        return ⟨ StmtExpr.Block (newAssign :: suffixes) (some "$inlineMe"), source ⟩
       else
         return newAssign
 
diff --git a/Strata/Languages/Laurel/LaurelCompilationPipeline.lean b/Strata/Languages/Laurel/LaurelCompilationPipeline.lean
index c6984120f..22e40c57f 100644
--- a/Strata/Languages/Laurel/LaurelCompilationPipeline.lean
+++ b/Strata/Languages/Laurel/LaurelCompilationPipeline.lean
@@ -180,6 +180,15 @@ private def runLaurelPasses (options : LaurelTranslateOptions) (program : Progra
     -- Run resolve after the pass if needed
     if pass.needsResolves then
       let result := resolve program (some model)
+      let newErrors := result.errors.filter fun e => !resolutionErrors.contains e
+      if !newErrors.isEmpty then
+        let newDiags := newErrors.toList.map fun d =>
+          { d with
+              message :=
+                s!"Internal error: resolution after '{pass.name}' introduced this diagnostic: {d.message}"
+              type := .StrataBug }
+        emit pass.name "laurel.st" program
+        return (program, model, allDiags ++ newDiags, allStats)
       program := result.program
       model := result.model
     emit pass.name "laurel.st" program
diff --git a/StrataTest/Languages/Laurel/ConstrainedTypeElimTest.lean b/StrataTest/Languages/Laurel/ConstrainedTypeElimTest.lean
index 86ce51e68..0811d5e95 100644
--- a/StrataTest/Languages/Laurel/ConstrainedTypeElimTest.lean
+++ b/StrataTest/Languages/Laurel/ConstrainedTypeElimTest.lean
@@ -52,6 +52,7 @@ procedure test(n: int)
   ensures nat$constraint(r)
 { assert r >= 0; var y: int := n; assert nat$constraint(y); return y };
 procedure $witness_nat()
+  opaque
 { var $witness: int := 0; assert nat$constraint($witness) };
 -/
 #guard_msgs in
@@ -80,6 +81,7 @@ info: function pos$constraint(v: int): bool
 procedure test(b: bool)
 { if b then { var x: int := 1; assert pos$constraint(x) }; { var x: int := -5; x := -10 } };
 procedure $witness_pos()
+  opaque
 { var $witness: int := 1; assert pos$constraint($witness) };
 -/
 #guard_msgs in
@@ -104,6 +106,7 @@ info: function posint$constraint(x: int): bool
 procedure f()
 { var x: int; assume posint$constraint(x); assert x == 1 };
 procedure $witness_posint()
+  opaque
 { var $witness: int := 1; assert posint$constraint($witness) };
 -/
 #guard_msgs in
diff --git a/StrataTest/Languages/Laurel/Examples/Objects/T1_MutableFields.lean b/StrataTest/Languages/Laurel/Examples/Objects/T1_MutableFields.lean
index 7dbf35022..e46f03ef9 100644
--- a/StrataTest/Languages/Laurel/Examples/Objects/T1_MutableFields.lean
+++ b/StrataTest/Languages/Laurel/Examples/Objects/T1_MutableFields.lean
@@ -199,5 +199,5 @@ procedure fieldTargetInMultiAssign()
 };
 "#
 
-#guard_msgs(drop info, error) in
+#guard_msgs (drop info, error) in
 #eval testInputWithOffset "MutableFields" program 14 processLaurelFile
diff --git a/StrataTest/Languages/Laurel/Examples/Objects/T7_InstanceProcedures.lean b/StrataTest/Languages/Laurel/Examples/Objects/T7_InstanceProcedures.lean
index ec05fcfd3..189295102 100644
--- a/StrataTest/Languages/Laurel/Examples/Objects/T7_InstanceProcedures.lean
+++ b/StrataTest/Languages/Laurel/Examples/Objects/T7_InstanceProcedures.lean
@@ -15,8 +15,8 @@ namespace Strata.Laurel
 def instanceProcedureProgram := r"
 composite Counter {
   var count: int
-  procedure increment(self: Counter)
-//          ^^^^^^^^^ error: Instance procedure 'increment' on composite type 'Counter' is not yet supported
+  procedure self_increment(self: Counter)
+//          ^^^^^^^^^^^^^^ error: Instance procedure 'self_increment' on composite type 'Counter' is not yet supported
     opaque
   {
     self#count := self#count + 1
diff --git a/StrataTest/Languages/Laurel/TestExamples.lean b/StrataTest/Languages/Laurel/TestExamples.lean
index 5affbb281..781cc366f 100644
--- a/StrataTest/Languages/Laurel/TestExamples.lean
+++ b/StrataTest/Languages/Laurel/TestExamples.lean
@@ -36,4 +36,14 @@ def processLaurelFileWithOptions (options : LaurelVerifyOptions) (input : InputC
 def processLaurelFile (input : InputContext) : IO (Array Diagnostic) :=
   processLaurelFileWithOptions default input
 
+/-- Project-root-relative path to the `Build/` directory for intermediate files.
+    Resolved from the current working directory so it works on any machine. -/
+def buildDir : IO String := do
+  let cwd ← IO.currentDir
+  return s!"{cwd}/Build/"
+
+def processLaurelFileKeepIntermediates (input : InputContext) : IO (Array Diagnostic) := do
+  let dir ← buildDir
+  processLaurelFileWithOptions { translateOptions := { keepAllFilesPrefix := dir}} input
+
 end Laurel