git commit bypasses commit-msg hook (likely --no-verify)

Bug

Claude Code appears to bypass the commit-msg git hook when running git commit. The pre-commit hook runs (its output is visible), but the commit-msg hook never fires — commits with invalid messages go through without rejection.

Evidence

• commit-msg hook is installed: .git/hooks/commit-msg -> ../../hooks/commit-msg
• Hook is executable and works when called directly
• Hook validates conventional commit format and rejects non-conforming messages with exit 1
• pre-commit hook output IS visible during commit (formatting checks, terraform-docs)
• commit-msg hook output is NOT visible, and non-conforming commits succeed

Expected behavior

git commit should respect the commit-msg hook. If the hook exits non-zero, the commit should fail.

Likely cause

The harness runs the pre-commit hook separately, then calls git commit --no-verify (or equivalent), which skips all git-native hooks including commit-msg.

Impact

Projects relying on commit-msg hooks for conventional commit enforcement get silently bypassed. This breaks changelog generation (git-cliff) and CI workflows that depend on commit message format.

Environment

• Claude Code CLI
• macOS (Darwin 25.5.0)
• Model: claude-opus-4-6
• Hook: symlink to bash script in hooks/commit-msg