docs: changelog

Author: thegdsks

CHANGELOG.md

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+# Changelog
+
+All notable changes to `ableton-skills` are documented here.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [0.1.0] - 2026-04-25
+
+### Added
+
+- 12 production-ready skills:
+  - `producer-mode` — track scaffolding from a brief
+  - `mixer-doctor` — mix diagnostic + corrective EQ/comp moves
+  - `midi-cleanup` — humanize, voice leading, intelligent quantize
+  - `arrangement-coach` — Session → Arrangement promotion
+  - `sound-designer` — synth patch design (Operator/Wavetable/Analog/Drift)
+  - `reference-match` — translate artist references to actionable moves
+  - `mastering-prep` — pre-master audit checklist
+  - `chord-pro` — chord progression generation with proper voicing
+  - `groove-builder` — drum patterns by genre
+  - `sidechain-setup` — sidechain compression routing
+  - `tempo-coach` — tempo/time-sig/feel guidance
+  - `vocal-chain` — vocal processing chains
+- 4 slash commands:
+  - `/ableton-init` — scaffold a clean project structure
+  - `/ableton-export` — pre-export audit
+  - `/ableton-snapshot` — markdown snapshot of session state
+  - `/ableton-debug` — connection/behavior diagnostics
+- `CLAUDE.md` drop-in template for Ableton projects
+- Multi-platform support: Claude Code, Cursor, Codex CLI, Gemini CLI
+- GitHub Actions CI for skill frontmatter validation
+
+[Unreleased]: https://github.com/glincker/ableton-skills/compare/v0.1.0...HEAD
+[0.1.0]: https://github.com/glincker/ableton-skills/releases/tag/v0.1.0