Add Skill: text-concatenation-workflow

Extracted from: https://github.com/temiroff/Blacknode.git
Score: 1.0

skills/text-concatenation-workflow/metadata.json

@@ -0,0 +1,31 @@
+{
+  "name": "text-concatenation-workflow",
+  "version": "1.0.0",
+  "goal": "Concatenate two text strings and produce the combined output.",
+  "inputs": [
+    "text_a (string)",
+    "text_b (string)"
+  ],
+  "steps": [
+    "Create a Text node with value set to input text_a.",
+    "Create a second Text node with value set to input text_b.",
+    "Create a Concat node with inputs a and b.",
+    "Create an Output node.",
+    "Connect Text node a 'value' port to Concat node 'a' port.",
+    "Connect Text node b 'value' port to Concat node 'b' port.",
+    "Connect Concat node 'value' port to Output node 'value' port.",
+    "Execute/cook the graph from the Output node to obtain the result."
+  ],
+  "outputs": [
+    "concatenated_text (string)"
+  ],
+  "failure_modes": [
+    "Missing or invalid text inputs.",
+    "Graph execution error if nodes are not properly connected.",
+    "Concat node may not handle non-string types."
+  ],
+  "confidence": 0.95,
+  "explanation": "Extracted from examples/converted_text_pipeline.py which demonstrates a simple Blacknode graph workflow: two Text nodes feed a Concat node that outputs via an Output node. This pattern is reusable for any text combination task.",
+  "source_repo": "https://github.com/temiroff/Blacknode.git",
+  "score": 1.0
+}