diff --git a/Pantograph/Frontend/InfoTree.lean b/Pantograph/Frontend/InfoTree.lean
index a38775c..6fe9370 100644
--- a/Pantograph/Frontend/InfoTree.lean
+++ b/Pantograph/Frontend/InfoTree.lean
@@ -25,9 +25,9 @@ protected def Info.stx? : Info → Option Syntax
   | .ofCustomInfo         info => info.stx
   | .ofFVarAliasInfo      _    => none
   | .ofFieldRedeclInfo    info => info.stx
-  | .ofOmissionInfo       info => info.stx
   | .ofChoiceInfo         info => info.stx
   | .ofPartialTermInfo    info => info.stx
+  | .ofDelabTermInfo      info => info.stx
 /-- Is the `Syntax` for this `Lean.Elab.Info` original, or synthetic? -/
 protected def Info.isOriginal (i : Info) : Bool :=
   match i.stx? with
@@ -142,9 +142,9 @@ partial def InfoTree.toString (t : InfoTree) (ctx?: Option Elab.ContextInfo := .
       | .ofCustomInfo _ => pure "[custom]"
       | .ofFVarAliasInfo _ => pure "[fvar]"
       | .ofFieldRedeclInfo _ => pure "[field_redecl]"
-      | .ofOmissionInfo _ => pure "[omission]"
       | .ofChoiceInfo _ => pure "[choice]"
       | .ofPartialTermInfo  _ => pure "[partial_term]"
+      | .ofDelabTermInfo _ => pure "[delab_term]"
       let children := "\n".intercalate (← children.toList.mapM λ t' => do pure $ indent $ ← t'.toString ctx)
       return s!"{node}\n{children}"
     else throw <| IO.userError "No `ContextInfo` available."
diff --git a/Pantograph/Tactic/Assign.lean b/Pantograph/Tactic/Assign.lean
index c87dd46..af9d15f 100644
--- a/Pantograph/Tactic/Assign.lean
+++ b/Pantograph/Tactic/Assign.lean
@@ -28,15 +28,16 @@ def evalAssign : Elab.Tactic.Tactic := fun stx => Elab.Tactic.withMainContext do
   Elab.Tactic.replaceMainGoal nextGoals
 
 def sorryToHole (src : Expr) : StateRefT (List MVarId) MetaM Expr := do
-  Meta.transform src λ
-    | .app (.app (.const ``sorryAx ..) type) .. => do
-      let type ← instantiateMVars type
+  Meta.transform src λ expr =>
+    if expr.isSorry then do
+      let type ← instantiateMVars (expr.getArg! 0 |>.bindingBody!)
       if type.hasSorry then
         throwError s!"Coupling is not allowed in draft tactic: {← Meta.ppExpr type}"
       let mvar ← Meta.mkFreshExprSyntheticOpaqueMVar type
       modify (mvar.mvarId! :: .)
       pure $ .done mvar
-    | _ => pure .continue
+    else
+      pure .continue
 
 -- Given a complete (no holes) expression, extract the sorry's from it and convert them into goals.
 def draft (goal : MVarId) (expr : Expr) : MetaM (List MVarId) := do
diff --git a/Pantograph/Version.lean b/Pantograph/Version.lean
index a4b056c..a65274d 100644
--- a/Pantograph/Version.lean
+++ b/Pantograph/Version.lean
@@ -1,6 +1,6 @@
 namespace Pantograph
 
 @[export pantograph_version]
-def version := "0.2.25"
+def version := "0.3.0-rc.1"
 
 end Pantograph
diff --git a/Test/Metavar.lean b/Test/Metavar.lean
index 276004b..421ea01 100644
--- a/Test/Metavar.lean
+++ b/Test/Metavar.lean
@@ -192,7 +192,7 @@ def test_proposition_generation: TestM Unit := do
       addTest $ assertUnreachable $ other.toString
       return ()
   addTest $ LSpec.check ":= λ (x: Nat), _" ((← state2.serializeGoals (options := ← read)).map (·.target.pp?) =
-    #[.some "?m.29 x"])
+    #[.some "?m.30 x"])
   addTest $ LSpec.test "(2 root)" state2.rootExpr?.isNone
 
   let assign := "Eq.refl x"
diff --git a/Test/Tactic/MotivatedApply.lean b/Test/Tactic/MotivatedApply.lean
index 2da643e..fbb1d7c 100644
--- a/Test/Tactic/MotivatedApply.lean
+++ b/Test/Tactic/MotivatedApply.lean
@@ -100,7 +100,7 @@ def test_partial_motive_instantiation : TestT Elab.TermElabM Unit := do
 
     addTest $ ← conduit.withContext do
       let t := toString (← Meta.ppExpr $ ← conduit.getType)
-      return LSpec.check "conduit" (t = s!"(Nat.add ?m.{majorId} + 0 = ?m.149 ?m.{majorId}) = (n + 0 = n)")
+      return LSpec.check "conduit" (t = s!"(Nat.add ?m.{majorId} + 0 = ?m.150 ?m.{majorId}) = (n + 0 = n)")
 
 def suite (env: Environment): List (String × IO LSpec.TestSeq) :=
   [
diff --git a/flake.lock b/flake.lock
index 4a17f3d..f164bbd 100644
--- a/flake.lock
+++ b/flake.lock
@@ -5,11 +5,11 @@
         "nixpkgs-lib": "nixpkgs-lib"
       },
       "locked": {
-        "lastModified": 1730504689,
-        "narHash": "sha256-hgmguH29K2fvs9szpq2r3pz2/8cJd2LPS+b4tfNFCwE=",
+        "lastModified": 1738453229,
+        "narHash": "sha256-7H9XgNiGLKN1G1CgRh0vUL4AheZSYzPm+zmZ7vxbJdo=",
         "owner": "hercules-ci",
         "repo": "flake-parts",
-        "rev": "506278e768c2a08bec68eb62932193e341f55c90",
+        "rev": "32ea77a06711b758da0ad9bd6a844c5740a87abd",
         "type": "github"
       },
       "original": {
@@ -42,11 +42,11 @@
         "nixpkgs": "nixpkgs"
       },
       "locked": {
-        "lastModified": 1736388194,
-        "narHash": "sha256-ymSrd/A8Pw+9FzbxUbR7CkFHLJK1b4SnFFWg/1e0JeE=",
+        "lastModified": 1739073990,
+        "narHash": "sha256-VmLkZf4+1HWrIDB/JUlPOAmOlutR6XTFRhDzDYJcYZM=",
         "owner": "lenianiva",
         "repo": "lean4-nix",
-        "rev": "90f496bc0694fb97bdfa6adedfc2dc2c841a4cf2",
+        "rev": "7a6faedc6c3ab35c42add15c354bf69542b9a6e6",
         "type": "github"
       },
       "original": {
@@ -90,14 +90,14 @@
     },
     "nixpkgs-lib": {
       "locked": {
-        "lastModified": 1730504152,
-        "narHash": "sha256-lXvH/vOfb4aGYyvFmZK/HlsNsr/0CVWlwYvo2rxJk3s=",
+        "lastModified": 1738452942,
+        "narHash": "sha256-vJzFZGaCpnmo7I6i416HaBLpC+hvcURh/BQwROcGIp8=",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/cc2f28000298e1269cea6612cd06ec9979dd5d7f.tar.gz"
+        "url": "https://github.com/NixOS/nixpkgs/archive/072a6db25e947df2f31aab9eccd0ab75d5b2da11.tar.gz"
       },
       "original": {
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/cc2f28000298e1269cea6612cd06ec9979dd5d7f.tar.gz"
+        "url": "https://github.com/NixOS/nixpkgs/archive/072a6db25e947df2f31aab9eccd0ab75d5b2da11.tar.gz"
       }
     },
     "nixpkgs-lib_2": {
@@ -114,11 +114,11 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1731386116,
-        "narHash": "sha256-lKA770aUmjPHdTaJWnP3yQ9OI1TigenUqVC3wweqZuI=",
+        "lastModified": 1735563628,
+        "narHash": "sha256-OnSAY7XDSx7CtDoqNh8jwVwh4xNL/2HaJxGjryLWzX8=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "689fed12a013f56d4c4d3f612489634267d86529",
+        "rev": "b134951a4c9f3c995fd7be05f3243f8ecd65d798",
         "type": "github"
       },
       "original": {
diff --git a/lean-toolchain b/lean-toolchain
index d0eb99f..2586f88 100644
--- a/lean-toolchain
+++ b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:v4.15.0
+leanprover/lean4:v4.16.0