diff --git a/.claude/PROJECT.md b/.claude/PROJECT.md
new file mode 100644
index 0000000..44ae675
--- /dev/null
+++ b/.claude/PROJECT.md
@@ -0,0 +1,33 @@
+# File Soup - Claude Code Instructions
+
+This repository contains the File Soup file management utility.
+
+## Project Structure
+
+```
+file-soup/
+├── .claude/         # AI assistant instructions
+├── .git/           # Version control
+├── .gitignore      # Git ignore rules
+├── .editorconfig   # Editor configuration
+└── ...             # Utility files
+```
+
+## Build Commands
+
+Refer to project-specific documentation.
+
+## Coding Conventions
+
+- Follow hyperpolymath standards
+- All code must have SPDX license headers
+- Use approved languages only (see CLAUDE.md)
+- Document all non-obvious decisions
+
+## Security
+
+- No hardcoded secrets
+- All secrets through environment variables or secret management
+- SHA-pinned dependencies where applicable
+- HTTPS only, no HTTP URLs
+- No MD5/SHA1 for security purposes
diff --git a/selur-compose.toml b/selur-compose.toml
index 977ab68..88277fa 100644
--- a/selur-compose.toml
+++ b/selur-compose.toml
@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: PMPL-1.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 # Copyright (c) 2026 Jonathan D.A. Jewell (hyperpolymath) <j.d.a.jewell@open.ac.uk>
 #
 # Stapeln service definition for file-soup