chore(hooks): replace husky with worktree-safe .githooks installed automatically

Husky wired hook installation to pnpm install, which go-only contributors
never run. The installer is plain shell so both the Makefile and the frontend
postinstall can call it, and each check is gated on staged paths so neither
side needs the other's toolchain.

.githooks/commit-msg

@@ -1,7 +1,12 @@
 #!/bin/sh
-. "$(dirname "$0")/_/husky.sh"
 
-cd frontend && pnpm run commitlint --edit $1
+set -e
+
+if [ -d frontend/node_modules ] && command -v pnpm >/dev/null 2>&1; then
+	(cd frontend && pnpm run commitlint --edit "$1")
+else
+	echo "commit-msg: frontend dependencies not installed, skipping commitlint" >&2
+fi
 
 branch="$(git rev-parse --abbrev-ref HEAD)"
 

.githooks/install

@@ -0,0 +1,30 @@
+#!/bin/sh
+# Installs dispatcher stubs into the repository's hooks directory. Safe to run
+# repeatedly; invoked automatically from the Makefile and from the frontend
+# postinstall so no manual setup is required.
+
+set -e
+
+git rev-parse --git-dir >/dev/null 2>&1 || exit 0
+
+# core.hooksPath shadows the hooks directory git would otherwise use, and an
+# absolute value leaks one worktree's path into every other worktree.
+if [ -n "$(git config --get core.hooksPath 2>/dev/null || true)" ]; then
+	git config --unset-all core.hooksPath 2>/dev/null || true
+fi
+
+# Resolves to the common directory for linked worktrees, which is where git
+# looks for hooks regardless of which worktree the commit happens in.
+hooks_dir="$(git rev-parse --git-path hooks)"
+mkdir -p "$hooks_dir"
+
+for hook in pre-commit commit-msg; do
+	cat >"$hooks_dir/$hook" <<EOF
+#!/bin/sh
+# Generated by .githooks/install.
+root="\$(git rev-parse --show-toplevel)"
+[ -x "\$root/.githooks/$hook" ] || exit 0
+exec "\$root/.githooks/$hook" "\$@"
+EOF
+	chmod +x "$hooks_dir/$hook"
+done

.githooks/pre-commit

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+set -e
+
+staged_go_files=$(git diff --cached --name-only --diff-filter=ACM -- '*.go')
+if [ -n "$staged_go_files" ]; then
+	if command -v gofmt >/dev/null 2>&1; then
+		echo "$staged_go_files" | xargs gofmt -l -w
+		echo "$staged_go_files" | xargs git add
+	else
+		echo "pre-commit: gofmt not found, skipping go formatting" >&2
+	fi
+fi
+
+staged_web_files=$(git diff --cached --name-only --diff-filter=ACM -- 'frontend/*')
+if [ -n "$staged_web_files" ]; then
+	if [ -d frontend/node_modules ] && command -v pnpm >/dev/null 2>&1; then
+		cd frontend && pnpm lint-staged
+	else
+		echo "pre-commit: frontend dependencies not installed, skipping lint-staged" >&2
+	fi
+fi

Makefile

@@ -35,6 +35,13 @@ DOCKERFILE_ENTERPRISE 			= $(SRC)/cmd/enterprise/Dockerfile
 DOCKER_REGISTRY_ENTERPRISE 		?= docker.io/signoz/signoz
 JS_BUILD_CONTEXT 				= $(SRC)/frontend
 
+##############################################################
+# git hooks
+##############################################################
+# Hooks live outside the working tree, so they cannot be checked in. Expanded
+# while this file is parsed, which wires them up on any make invocation.
+GITHOOKS_INSTALL := $(shell sh $(SRC)/.githooks/install >/dev/null 2>&1 || true)
+
 ##############################################################
 # directories
 ##############################################################

frontend/.husky/pre-commit

@@ -1,4 +0,0 @@
-#!/bin/sh
-. "$(dirname "$0")/_/husky.sh"
-
-cd frontend && pnpm lint-staged

frontend/package.json

@@ -20,8 +20,7 @@
     "jest": "jest",
     "jest:coverage": "jest --coverage",
     "jest:watch": "jest --watch",
-    "postinstall": "pnpm i18n:generate-hash && (is-ci || pnpm husky:configure)  && node scripts/update-registry.cjs",
-    "husky:configure": "cd .. && husky install frontend/.husky && cd frontend && chmod ug+x .husky/*",
+    "postinstall": "pnpm i18n:generate-hash && (is-ci || sh ../.githooks/install) && node scripts/update-registry.cjs",
     "commitlint": "commitlint --edit $1",
     "test": "jest",
     "test:changedsince": "jest --changedSince=main --coverage --silent",
@@ -186,7 +185,6 @@
     "@typescript/native-preview": "7.0.0-dev.20260430.1",
     "eslint-plugin-sonarjs": "4.0.2",
     "glob": "^13.0.6",
-    "husky": "^7.0.4",
     "is-ci": "^3.0.1",
     "jest-environment-jsdom": "29.7.0",
     "jest-styled-components": "^7.2.0",

frontend/pnpm-lock.yaml

@@ -440,9 +440,6 @@ importers:
       glob:
         specifier: ^13.0.6
         version: 13.0.6
-      husky:
-        specifier: ^7.0.4
-        version: 7.0.4
       is-ci:
         specifier: ^3.0.1
         version: 3.0.1
@@ -5529,11 +5526,6 @@ packages:
     resolution: {integrity: sha512-eKCa6bwnJhvxj14kZk5NCPc6Hb6BdsU9DZcOnmQKSnO1VKrfV0zCvtttPZUsBvjmNDn8rpcJfpwSYnHBjc95MQ==}
     engines: {node: '>=18.18.0'}
 
-  husky@7.0.4:
-    resolution: {integrity: sha512-vbaCKN2QLtP/vD4yvs6iz6hBEo6wkSzs8HpRah1Z6aGmF2KW5PdYuAd7uX5a+OyBZHBhd+TFLqgjUgytQr4RvQ==}
-    engines: {node: '>=12'}
-    hasBin: true
-
   hyphenate-style-name@1.0.4:
     resolution: {integrity: sha512-ygGZLjmXfPHj+ZWh6LwbC37l43MhfztxetbFCoYTM2VjkIUpeHgSNn7QIyVFj7YQ1Wl9Cbw5sholVJPzWvC2MQ==}
 
@@ -14636,8 +14628,6 @@ snapshots:
 
   human-signals@8.0.1: {}
 
-  husky@7.0.4: {}
-
   hyphenate-style-name@1.0.4: {}
 
   i18next-browser-languagedetector@6.1.8: