Switch to uv and pyproject.toml for dependency management

Replaces requirements.txt. Harness installs from git via uv sources.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

README.md

@@ -29,6 +29,6 @@ E2B_API_KEY=your-e2b-api-key
 Run locally:
 
 ```
-pip install -r requirements.txt
-python app.py
+uv sync
+uv run python app.py
 ```

pyproject.toml

@@ -0,0 +1,18 @@
+[project]
+name = "document-explorer"
+version = "0.1.0"
+description = "Upload documents and ask questions — powered by a-simple-llm-harness"
+readme = "README.md"
+authors = [
+    { name = "chuckfinca", email = "charles@appsimple.io" }
+]
+requires-python = ">=3.12"
+dependencies = [
+    "a-simple-llm-harness",
+    "e2b-code-interpreter>=2.5",
+    "gradio>=5.0",
+    "python-dotenv",
+]
+
+[tool.uv.sources]
+a-simple-llm-harness = { git = "https://github.com/chuckfinca/a-simple-llm-harness.git" }

requirements.txt

@@ -1,4 +0,0 @@
-a-simple-llm-harness @ git+https://github.com/chuckfinca/a-simple-llm-harness.git
-e2b-code-interpreter>=2.5
-gradio>=5.0
-python-dotenv