diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
new file mode 100644
index 0000000..87b4ea7
--- /dev/null
+++ b/.github/pull_request_template.md
@@ -0,0 +1,46 @@
+## Summary
+
+_Describe the change and the user-facing or developer-facing impact._
+
+## Related Issues
+
+Closes #(issue number) or Relates to #(issue number)
+
+## What Changed
+
+- _Summarize the code, tests, docs, or tooling changes._
+- _Call out any API, CLI, or behavior changes explicitly._
+
+## Type of Change
+
+- **Bugfix**: Fix an existing feature
+- **Feature**: Introduces new functionality without breaking changes
+- **Enhancement**: Improves existing functionality
+- **Breaking Change**: Introduces breaking changes that require migration
+- **Refactoring**: Code restructuring without behavioral changes
+- **Build/Infrastructure**: Build system, CI/CD, dependencies, Docker
+- **Documentation**: Documentation, comments, or changelog updates
+
+## Validation
+
+- `./tools/lint.sh --changed`
+- `./tools/test.sh -q`
+- `./tools/docs.sh` (if docs or public API changed)
+- `python -m build` (if packaging or release files changed)
+- Manual testing described below when automated coverage is not enough
+
+## Breaking Changes
+
+_Describe any migration, compatibility, or deprecation impact. Write `None` if not applicable._
+
+## Notes for Reviewers
+
+_Call out anything that deserves extra attention: edge cases, tradeoffs, follow-up work, or known limitations._
+
+## Checklist
+
+- Code follows project style guidelines
+- Self-review completed
+- Comments added for complex logic
+- No breaking changes without documentation
+- Commit messages follow semantic convention: `{type}({scope}): {message}`
diff --git a/.github/workflows/unit_tests.yml b/.github/workflows/unit_tests.yml
index 17ba339..be6ea7c 100644
--- a/.github/workflows/unit_tests.yml
+++ b/.github/workflows/unit_tests.yml
@@ -2,33 +2,43 @@ name: cmdcraft unit testing
 
 on:
   push:
-    branches: [master]
+    branches:
+      - master
+      - v*-rc
   pull_request:
-    branches: [master, v*-rc]
+  workflow_dispatch:
 
 jobs:
   test:
+    if: github.event_name != 'pull_request' || github.event.pull_request.draft == false
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
 
     steps:
       - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
       - name: Setup Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
           allow-prereleases: true
-      - name: Install Dependencies
+          cache: pip
+
+      - name: Install dependencies
         run: |
-          sudo apt remove python3-pip
           python -m pip install --upgrade pip
-          python -m pip install . ruff coverage pytest readme_renderer
-      - name: Analysis
-        run: ./tools/analyse.sh
+          pip install -e '.[dev]'
+
+      - name: Lint
+        run: ./tools/lint.sh --changed
+
       - name: Tests
         run: ./tools/test.sh
+
       - name: Validate README.rst
-        run: python -m readme_renderer README.rst
\ No newline at end of file
+        run: python -m readme_renderer.rst README.rst > /dev/null
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index 7da1ea1..99dddb7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,110 @@
+[build-system]
+requires = ["setuptools>=69"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "cmdcraft"
+dynamic = ["version"]
+description = "Library for building interactive prompt-driven developer tools from Python callables"
+readme = { file = "README.rst", content-type = "text/x-rst" }
+authors = [{ name = "A. M. Weinsen Jr." }]
+license = "BSD-3-Clause"
+requires-python = ">=3.10"
+dependencies = ["prompt_toolkit>=3.0.52,<4"]
+classifiers = [
+    "Development Status :: 2 - Pre-Alpha",
+    "Intended Audience :: Developers",
+    "Intended Audience :: System Administrators",
+    "Operating System :: OS Independent",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3 :: Only",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
+    "Topic :: Software Development",
+]
+
+[project.optional-dependencies]
+dev = [
+    "build",
+    "coverage",
+    "pytest",
+    "readme_renderer",
+    "ruff",
+]
+docs = [
+    "furo",
+    "sphinx",
+]
+
+[project.urls]
+Homepage = "https://github.com/weinsen/cmdcraft"
+Repository = "https://github.com/weinsen/cmdcraft"
+
+[tool.setuptools]
+package-dir = {"" = "src"}
+
+[tool.setuptools.dynamic]
+version = {attr = "cmdcraft.__version__"}
+
+[tool.setuptools.packages.find]
+where = ["src"]
+
+# git-cliff configuration lives in pyproject.toml and is extracted by
+# tools/changelog.sh when generating release notes.
+[tool.git-cliff.changelog]
+header = """
+Changelog
+=========
+
+"""
+body = """
+{% if version %}{{ version }}
+------------------------------
+
+{% else %}Unreleased
+------------------------------
+
+{% endif %}{% for group, commits in commits | group_by(attribute="group") %}{{ group }}
+******************************
+
+{% for commit in commits %}- {{ commit.message | trim | upper_first }}
+{% endfor %}
+{% endfor %}
+"""
+trim = true
+render_always = false
+
+[tool.git-cliff.git]
+conventional_commits = true
+filter_unconventional = false
+split_commits = false
+protect_breaking_commits = false
+filter_commits = false
+tag_pattern = "v[0-9].*"
+topo_order = false
+topo_order_commits = true
+sort_commits = "oldest"
+commit_preprocessors = [
+    { pattern = "^new:\\s*", replace = "feat: " },
+    { pattern = "^doc:\\s*", replace = "docs: " },
+    { pattern = "^infra:\\s*", replace = "chore(infra): " },
+]
+commit_parsers = [
+    { message = "^feat", group = "Features" },
+    { message = "^fix", group = "Bug fixes" },
+    { message = "^docs", group = "Documentation" },
+    { message = "^test", group = "Testing" },
+    { message = "^chore\\(infra\\)", group = "Infrastructure" },
+    { message = "^refactor", group = "Refactoring" },
+    { message = "^Merge pull request", skip = true },
+    { message = "^fixup", skip = true },
+    { message = "^Update version$", skip = true },
+    { message = "^.*$", group = "Other" },
+]
+
 [tool.ruff]
 # Exclude a variety of commonly ignored directories.
 exclude = [
@@ -33,8 +140,8 @@ exclude = [
 line-length = 88
 indent-width = 4
 
-# Assume Python 3.8
-target-version = "py38"
+# Assume Python 3.10
+target-version = "py310"
 
 [tool.ruff.lint]
 select = ["RUF", "E", "W", "F", "I", "D", "UP"]
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index 885a9ea..0000000
--- a/requirements.txt
+++ /dev/null
@@ -1 +0,0 @@
-prompt_toolkit==3.0.47
\ No newline at end of file
diff --git a/setup.py b/setup.py
deleted file mode 100644
index fb6a0c0..0000000
--- a/setup.py
+++ /dev/null
@@ -1,52 +0,0 @@
-#!/usr/bin/env python3
-"""Setup cmdcraft library."""
-
-import os
-import re
-
-from setuptools import find_packages, setup
-
-with open(os.path.join(os.path.dirname(__file__), "README.rst")) as f:
-    """Extract version from README.rst."""
-    long_description = f.read()
-
-
-def get_version(package):
-    """Return package version as listed in `__version__` in `__init__.py`."""
-    path = os.path.join(os.path.dirname(__file__), "src", package, "__init__.py")
-    with open(path, "rb") as f:
-        init_py = f.read().decode("utf-8")
-    return re.search("__version__ = ['\"]([^'\"]+)['\"]", init_py).group(1)
-
-
-setup(
-    name="cmdcraft",
-    author="A. M. Weinsen Jr.",
-    version=get_version("cmdcraft"),
-    url="https://github.com/weinsen/cmdcraft",
-    description="",
-    long_description=long_description,
-    long_description_content_type="text/x-rst",
-    packages=find_packages(where="src"),
-    package_dir={"": "src"},
-    package_data={"cmdcraft": ["py.typed"]},
-    install_requires=["prompt_toolkit"],
-    python_requires=">=3.10.0",
-    extras_require={
-        "dev": ["ruff", "pytest"],
-    },
-    classifiers=[
-        "Development Status :: 2 - Pre-Alpha",
-        "Intended Audience :: Developers",
-        "Intended Audience :: System Administrators",
-        "License :: OSI Approved :: BSD License",
-        "Operating System :: OS Independent",
-        "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.10",
-        "Programming Language :: Python :: 3.11",
-        "Programming Language :: Python :: 3.12",
-        "Programming Language :: Python :: 3 :: Only",
-        "Programming Language :: Python",
-        "Topic :: Software Development",
-    ],
-)
diff --git a/tools/analyse.sh b/tools/analyse.sh
deleted file mode 100755
index 93fd79f..0000000
--- a/tools/analyse.sh
+++ /dev/null
@@ -1,17 +0,0 @@
-#!/bin/sh
-# *****************************************************************************
-# Copyright (c) 2024, Antonio Mario Weinsen Junior
-# All rights reserved.
-#
-# This source code is licensed under the BSD-style license found in the
-# LICENSE file in the root directory of this source tree.
-# *****************************************************************************
-
-# Test only new / modified files
-FILES=$(git diff --name-only --diff-filter=d develop | grep -E "(\.py$)")
-
-if [ -z "${FILES}" ]; then
-    exit 0
-fi
-
-ruff check ${FILES}
\ No newline at end of file
diff --git a/tools/common.sh b/tools/common.sh
new file mode 100644
index 0000000..30a8add
--- /dev/null
+++ b/tools/common.sh
@@ -0,0 +1,118 @@
+#!/bin/sh
+# *****************************************************************************
+# Copyright (c) 2024-2026, Antonio Mario Weinsen Junior
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
+# *****************************************************************************
+
+tool_repo_root() {
+    git rev-parse --show-toplevel 2>/dev/null || pwd
+}
+
+tool_first_existing_ref() {
+    for ref in "$@"; do
+        if [ -n "$ref" ] && git rev-parse --verify --quiet "${ref}^{commit}" >/dev/null; then
+            printf '%s\n' "$ref"
+            return 0
+        fi
+    done
+
+    return 1
+}
+
+tool_python_bin() {
+    if [ -n "${PYTHON:-}" ]; then
+        printf '%s\n' "${PYTHON}"
+        return 0
+    fi
+
+    if [ -n "${VIRTUAL_ENV:-}" ] && [ -x "${VIRTUAL_ENV}/bin/python" ]; then
+        printf '%s\n' "${VIRTUAL_ENV}/bin/python"
+        return 0
+    fi
+
+    repo_root=$(tool_repo_root)
+    if [ -x "${repo_root}/.venv/bin/python" ]; then
+        printf '%s\n' "${repo_root}/.venv/bin/python"
+        return 0
+    fi
+
+    if command -v python3 >/dev/null 2>&1; then
+        printf '%s\n' 'python3'
+        return 0
+    fi
+
+    if command -v python >/dev/null 2>&1; then
+        printf '%s\n' 'python'
+        return 0
+    fi
+
+    echo 'No Python interpreter found on PATH.' >&2
+    return 1
+}
+
+tool_resolve_base_ref() {
+    base_ref_override=${TOOLS_BASE_REF:-${CMDCRAFT_BASE_REF:-}}
+    if [ -n "${base_ref_override}" ]; then
+        tool_first_existing_ref "${base_ref_override}" "origin/${base_ref_override}"
+        return $?
+    fi
+
+    if [ -n "${GITHUB_BASE_REF:-}" ]; then
+        tool_first_existing_ref "origin/${GITHUB_BASE_REF}" "${GITHUB_BASE_REF}"
+        return $?
+    fi
+
+    if [ -n "${GITHUB_SHA:-}" ] && git rev-parse --verify --quiet HEAD^ >/dev/null; then
+        printf '%s\n' 'HEAD^'
+        return 0
+    fi
+
+    if git symbolic-ref refs/remotes/origin/HEAD >/dev/null 2>&1; then
+        git symbolic-ref --short refs/remotes/origin/HEAD
+        return 0
+    fi
+
+    tool_first_existing_ref origin/master master origin/main main
+}
+
+tool_tracked_python_files() {
+    git ls-files '*.py'
+}
+
+tool_changed_python_files() {
+    all_files=${TOOLS_ALL_FILES:-${CMDCRAFT_ALL_FILES:-0}}
+    if [ "${all_files}" = "1" ]; then
+        tool_tracked_python_files
+        return 0
+    fi
+
+    base_ref=$(tool_resolve_base_ref 2>/dev/null || true)
+    if [ -n "$base_ref" ]; then
+        git diff --name-only --diff-filter=d "$base_ref" -- '*.py'
+        return 0
+    fi
+
+    tool_tracked_python_files
+}
+
+tool_python_targets() {
+    tool_changed_python_files | sed '/^$/d'
+}
+
+tool_python_targets_for_scope() {
+    case "${1:-changed}" in
+        changed)
+            tool_changed_python_files
+            ;;
+        all)
+            tool_tracked_python_files
+            ;;
+        *)
+            echo "Unknown scope: ${1}" >&2
+            return 1
+            ;;
+    esac | sed '/^$/d'
+}
\ No newline at end of file
diff --git a/tools/docs.sh b/tools/docs.sh
deleted file mode 100755
index e3a2282..0000000
--- a/tools/docs.sh
+++ /dev/null
@@ -1,11 +0,0 @@
-#!/bin/sh
-# *****************************************************************************
-# Copyright (c) 2024, Antonio Mario Weinsen Junior
-# All rights reserved.
-#
-# This source code is licensed under the BSD-style license found in the
-# LICENSE file in the root directory of this source tree.
-# *****************************************************************************
-
-rm -rf docs/build
-sphinx-build -M html docs/source docs/build
\ No newline at end of file
diff --git a/tools/format.sh b/tools/format.sh
index 22a98c9..027d7e5 100755
--- a/tools/format.sh
+++ b/tools/format.sh
@@ -1,18 +1,23 @@
 #!/bin/sh
 # *****************************************************************************
-# Copyright (c) 2024, Antonio Mario Weinsen Junior
+# Copyright (c) 2024-2026, Antonio Mario Weinsen Junior
 # All rights reserved.
 #
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 # *****************************************************************************
 
-# Test only new / modified files
-FILES=$(git diff --name-only --diff-filter=d develop | grep -E "(\.py$)")
+set -eu
+
+SCRIPT_DIR=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
+. "$SCRIPT_DIR/common.sh"
+
+PYTHON_BIN=$(tool_python_bin)
+FILES=$(tool_python_targets_for_scope changed)
 
 if [ -z "${FILES}" ]; then
     exit 0
 fi
 
-ruff check ${FILES} --fix
-ruff format ${FILES}
\ No newline at end of file
+"${PYTHON_BIN}" -m ruff check --fix ${FILES}
+"${PYTHON_BIN}" -m ruff format ${FILES}
\ No newline at end of file
diff --git a/tools/lint.sh b/tools/lint.sh
new file mode 100755
index 0000000..409ea04
--- /dev/null
+++ b/tools/lint.sh
@@ -0,0 +1,48 @@
+#!/bin/bash
+# *****************************************************************************
+# Copyright (c) 2024-2026, Antonio Mario Weinsen Junior
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
+# *****************************************************************************
+
+set -eu
+
+SCRIPT_DIR=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
+. "$SCRIPT_DIR/common.sh"
+
+usage() {
+    echo "Usage: $0 [--all|--changed]" >&2
+}
+
+scope=all
+
+case "${1:-}" in
+    "")
+        ;;
+    --all)
+        scope=all
+        ;;
+    --changed)
+        scope=changed
+        ;;
+    -h|--help)
+        usage
+        exit 0
+        ;;
+    *)
+        usage
+        exit 1
+        ;;
+esac
+
+PYTHON_BIN=$(tool_python_bin)
+FILES=$(tool_python_targets_for_scope "$scope")
+
+if [ -z "${FILES}" ]; then
+    exit 0
+fi
+
+"${PYTHON_BIN}" -m ruff check ${FILES}
+"${PYTHON_BIN}" -m ruff format --check ${FILES}
\ No newline at end of file
diff --git a/tools/test.sh b/tools/test.sh
index ea4480c..88a59f3 100755
--- a/tools/test.sh
+++ b/tools/test.sh
@@ -1,10 +1,17 @@
 #!/bin/sh
 # *****************************************************************************
-# Copyright (c) 2024, Antonio Mario Weinsen Junior
+# Copyright (c) 2024-2026, Antonio Mario Weinsen Junior
 # All rights reserved.
 #
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 # *****************************************************************************
 
-python3 -m pytest test
\ No newline at end of file
+set -eu
+
+SCRIPT_DIR=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
+. "$SCRIPT_DIR/common.sh"
+
+PYTHON_BIN=$(tool_python_bin)
+
+"${PYTHON_BIN}" -m pytest test "$@"
\ No newline at end of file