diff --git a/CLAUDE.md b/CLAUDE.md
index 70741a2..781a297 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -339,7 +339,7 @@ Five active workstreams run in parallel — **IR** (the language compiler),
 overhaul, mem.sx + protocol expansion), **LANG** (user-facing language
 features — diagnostics renderer, heterogeneous variadic packs), and
 **ERR** (error handling: separate-channel `!` errors, `try` / `catch` /
-`or` / `errdefer`, return traces). They touch mostly disjoint files;
+`or` / `onfail`, return traces). They touch mostly disjoint files;
 any can be advanced independently.
 
 1. Read all five checkpoints to see where each stream is paused:
@@ -537,7 +537,7 @@ Wiring a new bundling step:
 | `current/CHECKPOINT-FFI.md` | **Active** FFI progress tracker. Update after every step. |
 | `current/PLAN-LANG.md` | **Active** LANG implementation plan (diagnostics renderer, heterogeneous variadic packs). |
 | `current/CHECKPOINT-LANG.md` | **Active** LANG progress tracker. Update after every step. |
-| `current/PLAN-ERR.md` | **Active** ERR implementation plan (`!` errors, `try` / `catch` / `or` / `errdefer`, return traces). |
+| `current/PLAN-ERR.md` | **Active** ERR implementation plan (`!` errors, `try` / `catch` / `or` / `onfail`, return traces). |
 | `current/CHECKPOINT-ERR.md` | **Active** ERR progress tracker. Update after every step. |
 | `implementation_plan.md` | Archive of completed work (closures, protocols, etc.). Do not pick up tasks from here. |
 | `readme.md` | Original syntax sketches. Do not modify. |