diff --git a/.claude/settings.local.json b/.claude/settings.local.json
index 7ac470b..ea32c6f 100644
--- a/.claude/settings.local.json
+++ b/.claude/settings.local.json
@@ -12,7 +12,8 @@
       "Bash(gh pr diff:*)",
       "Bash(git log:*)",
       "Bash(identify:*)",
-      "Bash(just shellcheck:*)"
+      "Bash(just shellcheck:*)",
+      "Bash(just claude_review:*)"
     ],
     "deny": [],
     "ask": []
diff --git a/.just/RELEASE_NOTES.md b/.just/RELEASE_NOTES.md
index 2742d02..11594be 100644
--- a/.just/RELEASE_NOTES.md
+++ b/.just/RELEASE_NOTES.md
@@ -2,7 +2,28 @@
 
 This file tracks the evolution of the Git/GitHub workflow automation module.
 
-## November 2025 - The Polish Updates
+## December 2025 - Finer refinements
+
+### v4.2 - Prerequisites Installation Script (#48)
+
+Added a standalone shell script to automate installation and verification of all
+prerequisites needed to run the just recipes in this repository:
+
+- **`install-prerequisites.sh`** - Intelligent installation helper that checks
+  for all required tools (just, gh, shellcheck, markdownlint-cli2, jq) and
+  either auto-installs them (macOS with Homebrew) or provides the appropriate
+  installation commands (Linux with apt-get, dnf, or pacman). Shows what's
+  already installed vs. what's missing with clear colored output. Includes
+  proper error handling for missing package managers and Node.js/npm for
+  markdownlint-cli2. Makes onboarding new contributors or setting up new
+  development environments significantly smoother.
+
+The script is fully executable, passes shellcheck validation, and provides a
+friendly user experience with color-coded output and helpful error messages.
+Run `./.just/install-prerequisites.sh` to check your environment or install
+missing tools.
+
+**Related PRs:** [#48](https://github.com/fini-net/template-repo/pull/48)
 
 ### v4.1 - Release Monitoring and Iteration Workflow (#46)
 
@@ -34,6 +55,8 @@ and `again` for rapid PR iteration.
 
 **Related PRs:** [#46](https://github.com/fini-net/template-repo/pull/46)
 
+## November 2025 - The Polish Updates
+
 ### v4.0 - PR Description Management (#44)
 
 Added two new recipes for managing pull request descriptions dynamically:
diff --git a/.just/gh-process.just b/.just/gh-process.just
index 1b59e33..4785133 100644
--- a/.just/gh-process.just
+++ b/.just/gh-process.just
@@ -13,7 +13,7 @@ sync:
     git pull
     git status --porcelain # stp
 
-# PR create v4.1
+# PR create v4.2
 [group('Process')]
 pr: _has_commits && pr_checks
     #!/usr/bin/env bash
diff --git a/.just/install-prerequisites.sh b/.just/install-prerequisites.sh
new file mode 100755
index 0000000..2f07a53
--- /dev/null
+++ b/.just/install-prerequisites.sh
@@ -0,0 +1,258 @@
+#!/usr/bin/env bash
+# Install prerequisites for just recipes
+#
+# Usage: ./.just/install-prerequisites.sh
+#
+# This script checks for required tools (just, gh, shellcheck, markdownlint-cli2, jq)
+# and helps install them:
+#
+# - macOS: Automatically installs missing tools using Homebrew
+# - Linux: Displays installation commands for manual execution
+# - Other: Shows links to installation documentation
+#
+# Run multiple times to verify installations completed successfully.
+
+set -euo pipefail # strict mode
+
+# ANSI color codes
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+CYAN='\033[0;36m'
+MAGENTA='\033[0;35m'
+NC='\033[0m' # No Color
+
+echo -e "${MAGENTA}Checking prerequisites for just recipes...${NC}"
+echo ""
+
+MISSING=()
+INSTALLED=()
+
+# check each prerequisite
+if command -v just &> /dev/null; then
+    INSTALLED+=("just")
+else
+    MISSING+=("just")
+fi
+
+if command -v gh &> /dev/null; then
+    INSTALLED+=("gh")
+else
+    MISSING+=("gh")
+fi
+
+if command -v shellcheck &> /dev/null; then
+    INSTALLED+=("shellcheck")
+else
+    MISSING+=("shellcheck")
+fi
+
+if command -v markdownlint-cli2 &> /dev/null; then
+    INSTALLED+=("markdownlint-cli2")
+else
+    MISSING+=("markdownlint-cli2")
+fi
+
+if command -v jq &> /dev/null; then
+    INSTALLED+=("jq")
+else
+    MISSING+=("jq")
+fi
+
+# report what's already installed
+if [[ ${#INSTALLED[@]} -gt 0 ]]; then
+    echo -e "${GREEN}Already installed:${NC}"
+    for tool in "${INSTALLED[@]}"; do
+        echo -e "  ${GREEN}✓${NC} $tool"
+    done
+    echo ""
+fi
+
+# if everything is installed, we're done
+if [[ ${#MISSING[@]} -eq 0 ]]; then
+    echo -e "${GREEN}All prerequisites are installed!${NC}"
+    exit 0
+fi
+
+# report what's missing
+echo -e "${YELLOW}Missing prerequisites:${NC}"
+for tool in "${MISSING[@]}"; do
+    echo -e "  ${YELLOW}✗${NC} $tool"
+done
+echo ""
+
+# detect OS and provide installation instructions
+if [[ "$OSTYPE" == "darwin"* ]]; then
+    echo -e "${BLUE}Detected macOS. Installing with Homebrew...${NC}"
+    echo ""
+
+    if ! command -v brew &> /dev/null; then
+        echo -e "${RED}Homebrew is not installed!${NC}"
+        echo "Install Homebrew first: https://brew.sh"
+        exit 1
+    fi
+
+    INSTALL_SUCCESS=()
+    INSTALL_FAILED=()
+
+    for tool in "${MISSING[@]}"; do
+        case "$tool" in
+            just)
+                echo -e "${CYAN}Installing just...${NC}"
+                if brew install just; then
+                    INSTALL_SUCCESS+=("just")
+                else
+                    INSTALL_FAILED+=("just")
+                    echo -e "${RED}Failed to install just${NC}"
+                fi
+                ;;
+            gh)
+                echo -e "${CYAN}Installing GitHub CLI...${NC}"
+                if brew install gh; then
+                    INSTALL_SUCCESS+=("gh")
+                    echo -e "${YELLOW}Don't forget to authenticate: gh auth login${NC}"
+                else
+                    INSTALL_FAILED+=("gh")
+                    echo -e "${RED}Failed to install gh${NC}"
+                fi
+                ;;
+            shellcheck)
+                echo -e "${CYAN}Installing shellcheck...${NC}"
+                if brew install shellcheck; then
+                    INSTALL_SUCCESS+=("shellcheck")
+                else
+                    INSTALL_FAILED+=("shellcheck")
+                    echo -e "${RED}Failed to install shellcheck${NC}"
+                fi
+                ;;
+            markdownlint-cli2)
+                echo -e "${CYAN}Installing markdownlint-cli2...${NC}"
+                if ! command -v npm &> /dev/null; then
+                    echo -e "${RED}npm is not installed! Install Node.js first.${NC}"
+                    echo "Install Node.js: brew install node"
+                    INSTALL_FAILED+=("markdownlint-cli2")
+                elif npm install -g markdownlint-cli2; then
+                    INSTALL_SUCCESS+=("markdownlint-cli2")
+                else
+                    INSTALL_FAILED+=("markdownlint-cli2")
+                    echo -e "${RED}Failed to install markdownlint-cli2${NC}"
+                fi
+                ;;
+            jq)
+                echo -e "${CYAN}Installing jq...${NC}"
+                if brew install jq; then
+                    INSTALL_SUCCESS+=("jq")
+                else
+                    INSTALL_FAILED+=("jq")
+                    echo -e "${RED}Failed to install jq${NC}"
+                fi
+                ;;
+        esac
+    done
+
+    echo ""
+    if [[ ${#INSTALL_SUCCESS[@]} -gt 0 ]]; then
+        echo -e "${GREEN}Successfully installed:${NC}"
+        for tool in "${INSTALL_SUCCESS[@]}"; do
+            echo -e "  ${GREEN}✓${NC} $tool"
+        done
+    fi
+
+    if [[ ${#INSTALL_FAILED[@]} -gt 0 ]]; then
+        echo ""
+        echo -e "${RED}Failed to install:${NC}"
+        for tool in "${INSTALL_FAILED[@]}"; do
+            echo -e "  ${RED}✗${NC} $tool"
+        done
+        echo ""
+        echo -e "${YELLOW}Run this script again to retry or install manually.${NC}"
+        exit 1
+    fi
+
+elif [[ "$OSTYPE" == "linux-gnu"* ]]; then
+    echo -e "${BLUE}Detected Linux. Showing installation commands...${NC}"
+    echo ""
+
+    # detect package manager
+    if command -v apt-get &> /dev/null; then
+        PKG_MGR="apt-get"
+        echo -e "${BLUE}Using apt-get package manager${NC}"
+    elif command -v dnf &> /dev/null; then
+        PKG_MGR="dnf"
+        echo -e "${BLUE}Using dnf package manager${NC}"
+    elif command -v pacman &> /dev/null; then
+        PKG_MGR="pacman"
+        echo -e "${BLUE}Using pacman package manager${NC}"
+    else
+        echo -e "${YELLOW}Could not detect package manager. Manual installation required.${NC}"
+        PKG_MGR="manual"
+    fi
+
+    for tool in "${MISSING[@]}"; do
+        case "$tool" in
+            just)
+                if [[ "$PKG_MGR" == "apt-get" ]]; then
+                    echo -e "${CYAN}Install just:${NC}"
+                    echo "  wget -qO - 'https://proget.makedeb.org/debian-feeds/prebuilt-mpr.pub' | gpg --dearmor | sudo tee /usr/share/keyrings/prebuilt-mpr-archive-keyring.gpg 1> /dev/null"
+                    echo "  echo \"deb [arch=all,\$(dpkg --print-architecture) signed-by=/usr/share/keyrings/prebuilt-mpr-archive-keyring.gpg] https://proget.makedeb.org prebuilt-mpr \$(lsb_release -cs)\" | sudo tee /etc/apt/sources.list.d/prebuilt-mpr.list"
+                    echo "  sudo apt update && sudo apt install just"
+                elif [[ "$PKG_MGR" == "dnf" ]]; then
+                    echo -e "${CYAN}Install just:${NC} sudo dnf install just"
+                elif [[ "$PKG_MGR" == "pacman" ]]; then
+                    echo -e "${CYAN}Install just:${NC} sudo pacman -S just"
+                else
+                    echo -e "${CYAN}Install just:${NC} See https://github.com/casey/just#installation"
+                fi
+                ;;
+            gh)
+                echo -e "${CYAN}Install GitHub CLI:${NC} See https://github.com/cli/cli/blob/trunk/docs/install_linux.md"
+                echo -e "${YELLOW}Don't forget to authenticate: gh auth login${NC}"
+                ;;
+            shellcheck)
+                if [[ "$PKG_MGR" == "apt-get" ]]; then
+                    echo -e "${CYAN}Install shellcheck:${NC} sudo apt-get install shellcheck"
+                elif [[ "$PKG_MGR" == "dnf" ]]; then
+                    echo -e "${CYAN}Install shellcheck:${NC} sudo dnf install shellcheck"
+                elif [[ "$PKG_MGR" == "pacman" ]]; then
+                    echo -e "${CYAN}Install shellcheck:${NC} sudo pacman -S shellcheck"
+                fi
+                ;;
+            markdownlint-cli2)
+                echo -e "${CYAN}Install markdownlint-cli2:${NC} npm install -g markdownlint-cli2"
+                echo -e "${YELLOW}(Requires Node.js/npm)${NC}"
+                ;;
+            jq)
+                if [[ "$PKG_MGR" == "apt-get" ]]; then
+                    echo -e "${CYAN}Install jq:${NC} sudo apt-get install jq"
+                elif [[ "$PKG_MGR" == "dnf" ]]; then
+                    echo -e "${CYAN}Install jq:${NC} sudo dnf install jq"
+                elif [[ "$PKG_MGR" == "pacman" ]]; then
+                    echo -e "${CYAN}Install jq:${NC} sudo pacman -S jq"
+                fi
+                ;;
+        esac
+    done
+
+    echo ""
+    echo -e "${YELLOW}Note: Commands shown above for manual execution.${NC}"
+    echo -e "${YELLOW}Run this script again after installing to verify.${NC}"
+
+else
+    echo -e "${YELLOW}Unsupported OS: $OSTYPE${NC}"
+    echo -e "${YELLOW}Please install these tools manually:${NC}"
+    for tool in "${MISSING[@]}"; do
+        echo "  - $tool"
+    done
+    echo ""
+    echo -e "${CYAN}Installation resources:${NC}"
+    echo "  just: https://github.com/casey/just#installation"
+    echo "  gh: https://cli.github.com/manual/installation"
+    echo "  shellcheck: https://github.com/koalaman/shellcheck#installing"
+    echo "  markdownlint-cli2: npm install -g markdownlint-cli2"
+    echo "  jq: https://stedolan.github.io/jq/download/"
+    exit 1
+fi
+
+echo ""
+echo -e "${GREEN}Installation complete! Run this script again to verify.${NC}"