Update README with config commands

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

README.md

@@ -96,6 +96,14 @@ export ARTDAG_L2=https://artdag.rose-ash.com
 ./artdag.py status <run-id>
 ```
 
+### Delete a Run
+```bash
+./artdag.py delete-run <run-id>
+
+# Skip confirmation
+./artdag.py delete-run <run-id> -f
+```
+
 ### List Cached Content
 ```bash
 ./artdag.py cache
@@ -118,6 +126,37 @@ export ARTDAG_L2=https://artdag.rose-ash.com
 ./artdag.py import /path/to/file.jpg
 ```
 
+### Delete Cached Content
+```bash
+./artdag.py delete-cache <content-hash>
+
+# Skip confirmation
+./artdag.py delete-cache <content-hash> -f
+```
+
+Note: Items that are inputs/outputs of runs, or published to L2, cannot be deleted.
+
+### Config Commands
+
+Configs are reusable DAG definitions with fixed and variable inputs.
+
+```bash
+# Upload a config YAML file
+./artdag.py upload-config recipe.yaml
+
+# List configs
+./artdag.py configs
+
+# View config details
+./artdag.py config <config-id>
+
+# Run a config with variable inputs
+./artdag.py run-config <config-id> -i node_id:content_hash --wait
+
+# Delete a config
+./artdag.py delete-config <config-id>
+```
+
 ## Example Workflow
 
 ```bash