feat: initial art assets

- cat.jpg: foundational image
- cat-copy.jpg: minted via identity-cat recipe
- cat-copy.provenance.json: full provenance chain

Owner: @giles@artdag.rose-ash.com

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

README.md

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+# Art DAG - Art Assets
+
+Content-addressed art storage. URLs use commit hashes for immutability.
+
+## Assets
+
+| Name | Hash | File |
+|------|------|------|
+| cat | `33268b6e...` | cat.jpg |
+| cat-copy | `33268b6e...` | cat-copy.jpg (minted via identity-cat recipe) |
+
+## Immutable URLs
+
+Use commit hash in URL for permanent reference:
+```
+https://git.rose-ash.com/art-dag/art/raw/{COMMIT_HASH}/cat.jpg
+```
+
+## Owner
+
+`@giles@artdag.rose-ash.com`

cat-copy.provenance.json

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+{
+  "minted_at": "2026-01-07T00:13:48.685232+00:00",
+  "minted_by": "@giles@artdag.rose-ash.com",
+  "output": {
+    "name": "cat-copy",
+    "content_hash": "33268b6e167deaf018cc538de12dbe562612b33e89a749391cef855b320a269b",
+    "local_path": "/home/giles/Pictures/cat-copy.jpg",
+    "url": "https://rose-ash.com/content/images/size/w1000/2026/01/cat-copy.jpg"
+  },
+  "inputs": [
+    {
+      "name": "cat",
+      "content_hash": "33268b6e167deaf018cc538de12dbe562612b33e89a749391cef855b320a269b"
+    }
+  ],
+  "recipe": {
+    "name": "identity-cat",
+    "url": "https://git.rose-ash.com/art-dag/recipes"
+  },
+  "effects": [
+    {
+      "name": "effect:identity",
+      "content_hash": "640ea11ee881ebf4101af0a955439105ab11e763682b209e88ea08fc66e1cc03"
+    }
+  ],
+  "infrastructure": {
+    "software": {
+      "name": "infra:artdag",
+      "content_hash": "96a5972de216aee12ec794dcad5f9360da2e676171eabf24a46dfe1ee5fee4b0"
+    },
+    "hardware": {
+      "name": "infra:giles-hp",
+      "content_hash": "964bf6e69dc4e2493f42375013caffe26404ec3cf8eb5d9bc170cd42a361523b"
+    }
+  },
+  "execution": {
+    "time_seconds": 0.0016865730285644531,
+    "nodes_executed": 2,
+    "nodes_cached": 0
+  }
+}