5 files changed, 10 insertions, 6 deletions
diff --git a/dot_config/git/hooks/_dispatch.sh b/dot_config/git/hooks/_dispatch.sh
index ed5acbf..9ba6e3b 100644
--- a/dot_config/git/hooks/_dispatch.sh
+++ b/dot_config/git/hooks/_dispatch.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env dash
 # Sourced by every hook in this directory. Runs the per-repo hook of
 # the same name and then returns control so the calling user-level
 # hook can do its own work after.
diff --git a/dot_config/git/hooks/executable_commit-msg b/dot_config/git/hooks/executable_commit-msg
index e484ccb..628ac94 100755
--- a/dot_config/git/hooks/executable_commit-msg
+++ b/dot_config/git/hooks/executable_commit-msg
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env dash
 # Strip Co-authored-by trailers whose identity looks like a coding agent
 # (Copilot, Claude, Codex, ChatGPT, Cursor, Aider, Devin, ...). Various
 # tools — GitHub Copilot CLI, VS Code chat, etc. — append these
@@ -58,7 +58,11 @@ esac
 
 # Collapse any trailing blank lines produced by the removal so we don't
 # leave a dangling blank trailer block.
-sed -e :a -e '/^$/{$d;N;ba' -e '}' "$tmp" >"$msg_file"
+awk '
+  NF { last = NR }
+  { lines[NR] = $0 }
+  END { for (i = 1; i <= last; i++) print lines[i] }
+' "$tmp" >"$msg_file"
 
 printf 'commit-msg: stripped AI Co-authored-by trailer(s).\n' >&2
 exit 0
diff --git a/dot_config/git/hooks/executable_post-commit b/dot_config/git/hooks/executable_post-commit
index 45f13f0..69d85f9 100755
--- a/dot_config/git/hooks/executable_post-commit
+++ b/dot_config/git/hooks/executable_post-commit
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env dash
 # User-level post-commit. No global checks — exists purely so that
 # `<repo>/.githooks/post-commit` gets picked up automatically without
 # the project needing to override core.hooksPath. If there is no
diff --git a/dot_config/git/hooks/executable_pre-commit b/dot_config/git/hooks/executable_pre-commit
index 548925b..76d623b 100755
--- a/dot_config/git/hooks/executable_pre-commit
+++ b/dot_config/git/hooks/executable_pre-commit
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env dash
 # User-level pre-commit. No global checks — exists purely so that
 # `<repo>/.githooks/pre-commit` gets picked up automatically without
 # the project needing to override core.hooksPath. If there is no
diff --git a/dot_config/git/hooks/executable_pre-push b/dot_config/git/hooks/executable_pre-push
index 286958b..b0915bf 100755
--- a/dot_config/git/hooks/executable_pre-push
+++ b/dot_config/git/hooks/executable_pre-push
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env dash
 # Reject pushes that include commits which:
 #   * lack a good signature, or
 #   * have a committer different from this repo's user.name / user.email, or