Merge branch 'next-release' into 'main'

chore(release): prepare for v0.3.9

See merge request unboundsoftware/pre-commit!104

.version

@@ -1 +1 @@
-{"version":"v0.3.8"}
+{"version":"v0.3.9"}

CHANGELOG.md

@@ -2,6 +2,16 @@
 
 All notable changes to this project will be documented in this file.
 
+## [0.3.9] - 2025-12-03
+
+### 🐛 Bug Fixes
+
+- Update libffi package in Dockerfile installation
+
+### 📚 Documentation
+
+- Add CLAUDE.md for project guidance and setup
+
 ## [0.3.8] - 2025-12-03
 
 ### 🐛 Bug Fixes

CLAUDE.md

@@ -0,0 +1,30 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+This repository builds a Docker image for running pre-commit hooks in CI/CD pipelines. The image is based on Go and includes Python (via pipx), Ruby, and common development tools like goimports and go-pre-commit.
+
+## Build Commands
+
+The project uses GitLab CI with custom templates:
+- Build and push are handled by the `build` and `push` commands from the `buildtool/build-tools` image
+- No local Makefile; builds run in CI pipeline
+
+## Release Process
+
+Releases use git-cliff for changelog generation:
+```bash
+git cliff -o CHANGELOG.md
+```
+
+Version is stored in `.version` as JSON: `{"version":"vX.Y.Z"}`
+
+## Conventional Commits
+
+This project uses conventional commits. Commit types:
+- `feat`: New features
+- `fix`: Bug fixes
+- `chore`: Maintenance tasks (deps, CI)
+- `docs`, `perf`, `refactor`, `style`, `test`: As standard

Dockerfile

@@ -3,7 +3,7 @@ FROM amd64/golang:1.25.5@sha256:ff44d519dbd3f622224d3433f319ae0b046abe081dda5b3d
 ENV PATH=${PATH}:/root/.local/bin
 
 RUN apt update && \
-    apt install -y python3 python3-pip ruby ruby-dev git pipx libffi8 && \
+    apt install -y python3 python3-pip ruby ruby-dev git pipx libffi-dev && \
     rm -rf /var/lib/apt/lists/* && \
     go install github.com/lietu/go-pre-commit@latest && \
     go install golang.org/x/tools/cmd/goimports@latest && \