diff --git a/docs/agent-handoff.md b/docs/agent-handoff.md
index 95839b6..a2bf199 100644
--- a/docs/agent-handoff.md
+++ b/docs/agent-handoff.md
@@ -122,7 +122,8 @@ next machine reads it the way you just did.
     as #125 and completed Arc 4 on `main`.
 - **Vterm Stage 1 terminal core IMPLEMENTED ON `vterm-core`, FULLY GATED,
   AWAITING REVIEW, NOT MERGED** (`docs/vterm-framing.md` rev 3).
-  - Feature commit: `bbc1f33`; pull request: #126,
+  - Implementation commits: `bbc1f33` (Stage 1) and `962944b` (Darwin PTY
+    signal normalization); pull request: #126,
     <https://github.com/levineuwirth/pmacs/pull/126> (open, non-draft,
     targeting `main`).
   - `AnsiParserProfile::{LineOriented, FullScreen}` preserves compile/REPL
@@ -146,14 +147,15 @@ next machine reads it the way you just did.
     output before exact PID/outcome annotation. One-row annotation visibility,
     TERM-ignoring shutdown, spawn rollback, buffer-kill prune, and immutable
     empty CRDT bootstrap are pinned.
-  - Final from-start rerun: Clippy clean; 1,657 default + 1,833 CRDT library
-    tests (3 ignored each); 8 default + 9 CRDT vterm acceptance; M4 114 passed
-    (3 ignored, 1 filtered); required GPU 109; workspace 2,764 passed across
-    79 suites (19 ignored, 1 filtered); diff check clean. The first Clippy
-    attempt found only missing crate docs in the new acceptance; it was fixed
-    and the whole sequence restarted. `scripts/bite main src/lib.rs --test
-    vterm_stage1_acceptance` is green only as the helper's explicitly weaker
-    compile-time API bite.
+  - Final from-start rerun after the portability fix: Clippy clean; 1,658
+    default + 1,834 CRDT library tests (3 ignored each); 8 default + 9 CRDT
+    vterm acceptance; M4 114 passed (3 ignored, 1 filtered); required GPU 109;
+    workspace 2,765 passed across 79 suites (19 ignored, 1 filtered); diff
+    check clean. The first gate pass found only missing crate docs in the new
+    acceptance; PR CI then exposed Darwin's numeric `strsignal` suffix. Both
+    fixes were followed by a complete restart from gate 1.
+    `scripts/bite main src/lib.rs --test vterm_stage1_acceptance` is green only
+    as the helper's explicitly weaker compile-time API bite.
   - Stage 2 reviews require a durable focus/input resize owner, owning
     `FrontendId` for the global `C-c` continuation, and local clipboard/BEL
     signal drainage. Stage 3 additionally owns `pmacs-gpu/src/attach.rs`,
diff --git a/docs/vterm-framing.md b/docs/vterm-framing.md
index ceb88d0..61006a1 100644
--- a/docs/vterm-framing.md
+++ b/docs/vterm-framing.md
@@ -110,18 +110,20 @@ All fourteen Stage 1 criteria are implemented:
 
 ### 0.3 Final gates and bite
 
-After one initial Clippy-only failure for the new acceptance crate's missing
-module documentation, that source issue was fixed and the complete sequence was
-restarted from gate 1:
+The initial gate run found and fixed missing module documentation in the new
+acceptance crate, then restarted from gate 1. After PR #126 opened, its macOS
+Lua 5.4 job exposed Darwin's numeric `strsignal` suffix (`"Terminated: 15"`);
+commit `962944b` normalizes both Darwin and glibc descriptions to the same
+symbolic signal. The complete sequence restarted from gate 1 again:
 
 - `cargo fmt --check`: clean;
 - `cargo clippy --workspace --all-targets -- -D warnings`: clean;
-- default library: 1,657 passed, 3 ignored;
-- CRDT library: 1,833 passed, 3 ignored;
+- default library: 1,658 passed, 3 ignored;
+- CRDT library: 1,834 passed, 3 ignored;
 - Stage 1 acceptance: 8 default + 9 CRDT passed;
 - M4 acceptance: 114 passed, 3 ignored, 1 `basedpyright` filtered;
 - required GPU: 109 passed;
-- workspace: 2,764 passed across 79 suites, 19 ignored, 1 filtered;
+- workspace: 2,765 passed across 79 suites, 19 ignored, 1 filtered;
 - `git diff --check`: clean.
 
 `scripts/bite main src/lib.rs --test vterm_stage1_acceptance` returned