diff --git a/.changeset/remove-multi-runtime.md b/.changeset/remove-multi-runtime.md
new file mode 100644
index 00000000..126c5ca5
--- /dev/null
+++ b/.changeset/remove-multi-runtime.md
@@ -0,0 +1,20 @@
+---
+"@perstack/core": patch
+"@perstack/runtime": patch
+"perstack": patch
+"@perstack/filesystem-storage": patch
+"@perstack/base": patch
+"@perstack/react": patch
+"@perstack/tui-components": patch
+"@perstack/provider-core": patch
+"@perstack/anthropic-provider": patch
+"@perstack/azure-openai-provider": patch
+"@perstack/bedrock-provider": patch
+"@perstack/deepseek-provider": patch
+"@perstack/google-provider": patch
+"@perstack/ollama-provider": patch
+"@perstack/openai-provider": patch
+"@perstack/vertex-provider": patch
+---
+
+Remove multi-runtime and storage abstraction layer. Simplify to local-only runtime with direct filesystem persistence.