diff --git a/.claude/hooks/block-dangerous-bash.sh b/.claude/hooks/block-dangerous-bash.sh
new file mode 100755
index 00000000..b06921fd
--- /dev/null
+++ b/.claude/hooks/block-dangerous-bash.sh
@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+input="$(cat)"
+cmd="$(echo "$input" | jq -r '.tool_input.command // empty')"
+
+[ -z "$cmd" ] && exit 0
+
+block() {
+  echo "Bash command blocked: $1. $2." >&2
+  exit 2
+}
+
+# git reset --hard
+if echo "$cmd" | grep -Eq 'git[[:space:]]+reset[[:space:]]+--hard'; then
+  block "git reset --hard destroys local work" "Use 'git stash' to set work aside, or branch off the current state before resetting"
+fi
+
+# git push --force / -f
+if echo "$cmd" | grep -Eq 'git[[:space:]]+push[[:space:]]+(--force([[:space:]]|=|$)|-f([[:space:]]|$))'; then
+  block "force push rewrites history" "Crewli uses --no-ff merges; never force-push. If the remote diverged, pull/rebase locally and resolve"
+fi
+
+# rm -rf on absolute paths outside /tmp and /home/<user>/
+if echo "$cmd" | grep -Eq '\brm[[:space:]]+-rf?[[:space:]]+/' && ! echo "$cmd" | grep -Eq '\brm[[:space:]]+-rf?[[:space:]]+/(tmp|var/folders|home/[^/[:space:]]+/[^[:space:]]|Users/[^/[:space:]]+/[^[:space:]])'; then
+  block "rm -rf on an absolute path outside /tmp" "Verify the path is project-relative; if you really need it, run it manually outside Claude Code"
+fi
+
+# php artisan migrate:fresh — only with --env=testing
+if echo "$cmd" | grep -Eq 'php[[:space:]]+artisan[[:space:]]+migrate:fresh\b'; then
+  if ! echo "$cmd" | grep -Eq -- '--env=testing\b'; then
+    block "migrate:fresh wipes the database" "Add --env=testing to scope this to the test database, or run a non-destructive 'migrate' / 'migrate:rollback'"
+  fi
+fi
+
+# php artisan db:wipe — only with --env=testing
+if echo "$cmd" | grep -Eq 'php[[:space:]]+artisan[[:space:]]+db:wipe\b'; then
+  if ! echo "$cmd" | grep -Eq -- '--env=testing\b'; then
+    block "db:wipe destroys the database" "Add --env=testing to scope this to the test database"
+  fi
+fi
+
+# composer/pnpm/npm update
+if echo "$cmd" | grep -Eq '\b(composer|pnpm|npm)[[:space:]]+update\b'; then
+  block "blanket dependency update bumps everything without review" "Use targeted 'composer require <pkg>' or 'pnpm add <pkg>' to bump one package at a time"
+fi
+
+exit 0
diff --git a/.claude/hooks/protect-files.sh b/.claude/hooks/protect-files.sh
new file mode 100755
index 00000000..662bf266
--- /dev/null
+++ b/.claude/hooks/protect-files.sh
@@ -0,0 +1,49 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+input="$(cat)"
+path="$(echo "$input" | jq -r '.tool_input.file_path // .tool_input.path // empty')"
+
+[ -z "$path" ] && exit 0
+
+block() {
+  echo "Edit to '$path' blocked: $1. $2." >&2
+  exit 2
+}
+
+# .env files (but not .env.example)
+if echo "$path" | grep -Eq '(^|/)\.env(\..*)?$' && ! echo "$path" | grep -Eq '(^|/)\.env\.example$'; then
+  block "secrets" "Propose changes to .env.example instead"
+fi
+
+# composer.lock
+if echo "$path" | grep -Eq '(^|/)composer\.lock$'; then
+  block "locked dependency tree" "Run composer require deliberately, then commit the regenerated lock file"
+fi
+
+# JS lock files
+if echo "$path" | grep -Eq '(^|/)(package-lock\.json|pnpm-lock\.yaml|yarn\.lock)$'; then
+  block "locked JS dependency tree" "Run pnpm add / npm install deliberately, then commit the regenerated lock file"
+fi
+
+# Laravel default migrations
+if echo "$path" | grep -Eq '(^|/)database/migrations/0001_01_01_.*\.php$'; then
+  block "Laravel default migration" "Never modify Laravel scaffold migrations — write a new migration that alters the table"
+fi
+
+# apps/admin/ — deleted SPA per WS-3
+if echo "$path" | grep -Eq '(^|/)apps/admin/'; then
+  block "apps/admin/ was deleted in WS-3 and must not return" "Use apps/app/ (Organizer SPA, includes Platform Admin under /platform/*)"
+fi
+
+# .claude/ tooling self-modification
+if echo "$path" | grep -Eq '(^|/)\.claude/'; then
+  block "tooling self-modification — Bert reviews .claude/ changes by hand" "Open the file in an editor outside Claude Code, or ask Bert to authorize the change explicitly"
+fi
+
+# dev-docs/SCHEMA.md
+if echo "$path" | grep -Eq '(^|/)dev-docs/SCHEMA\.md$'; then
+  block "SCHEMA.md is updated only at sprint milestones" "Bert decides when SCHEMA snapshots roll forward — do not edit ad hoc"
+fi
+
+exit 0