feat(integrations): add OpenClaw plugin and integration module (#460)

- Add integrations/openclaw/ with OpenClawKGTool (REST) and
  OpenClawMCPConfig (mcporter.json generator)
- Add plugins/.openclaw-plugin/ bundle (plugin.json, marketplace.json,
  README) with MCP + native tool support
- Add OpenClaw badge to README header
- Reorganize "Works With Every AI Tool" table into labeled groups:
  Native Plugin Bundle, MCP Server + Plugin, MCP Server, REST API

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

plugins/.openclaw-plugin/README.md

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+# Semantica — OpenClaw Plugin
+
+Adds all 17 Semantica skills, 3 agents, and the full MCP integration to [OpenClaw](https://openclaw.ai) — the open-source personal AI agent platform.
+
+## MCP Server Setup (recommended)
+
+### 1. Start the Semantica MCP server
+
+```bash
+python -m semantica.mcp_server
+```
+
+### 2. Add to `mcporter.json`
+
+Paste the following into your OpenClaw `mcporter.json` (usually `~/.openclaw/mcporter.json`):
+
+```json
+{
+  "mcpServers": {
+    "semantica": {
+      "command": "python",
+      "args": ["-m", "semantica.mcp_server"],
+      "transport": "stdio"
+    }
+  }
+}
+```
+
+### 3. Restart the OpenClaw Gateway
+
+```bash
+openclaw gateway restart
+```
+
+OpenClaw will automatically discover all 12 Semantica tools and 3 resources.
+
+## Skills
+
+All 17 skills under [`plugins/skills/`](../skills/) are available once the plugin is loaded:
+
+`extract` · `ingest` · `query` · `ontology` · `validate` · `deduplicate` · `embed` · `reason` · `decision` · `causal` · `temporal` · `provenance` · `policy` · `explain` · `export` · `change` · `visualize`
+
+## Native Tool (REST, no MCP gateway)
+
+For agents that cannot use the MCP gateway, use the `OpenClawKGTool` REST wrapper:
+
+```python
+from integrations.openclaw import OpenClawKGTool
+
+tool = OpenClawKGTool(base_url="http://localhost:8000")
+entities = tool.extract_entities("Alice manages the project.")
+tool.record_decision("Deploy model v2 to production")
+summary = tool.get_graph_summary()
+```
+
+See [`integrations/openclaw/README.md`](../../integrations/openclaw/README.md) for the full guide, including SOUL.md agent snippets.
+
+## Requirements
+
+- Python 3.8+
+- `pip install semantica`
+- OpenClaw — [openclaw.ai](https://openclaw.ai)

plugins/.openclaw-plugin/marketplace.json

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+{
+  "name": "semantica-openclaw",
+  "plugins": [
+    {
+      "name": "semantica",
+      "description": "Semantica plugin for OpenClaw: knowledge graph skills, decision intelligence, reasoning, extraction, and visualization.",
+      "source": "./",
+      "category": "Productivity",
+      "tags": [
+        "knowledge-graph",
+        "reasoning",
+        "semantica",
+        "openclaw",
+        "mcp"
+      ]
+    }
+  ]
+}

plugins/.openclaw-plugin/plugin.json

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+{
+  "name": "semantica-openclaw",
+  "displayName": "Semantica OpenClaw Plugin",
+  "description": "Semantica plugin for OpenClaw: knowledge graph skills, decision intelligence, reasoning, extraction, and visualization via MCP and native REST tool.",
+  "version": "0.1.0",
+  "author": {
+    "name": "Semantica Contributors"
+  },
+  "homepage": "https://github.com/Hawksight-AI/semantica",
+  "repository": "https://github.com/Hawksight-AI/semantica",
+  "license": "MIT",
+  "keywords": [
+    "semantica",
+    "knowledge graph",
+    "openclaw",
+    "context graphs",
+    "decision intelligence",
+    "explainability",
+    "causal analysis",
+    "provenance",
+    "ontology",
+    "graph analytics",
+    "semantic extraction",
+    "visualization",
+    "reasoning",
+    "mcp"
+  ],
+  "skills": "../skills",
+  "agents": "../agents",
+  "hooks": "../hooks/hooks.json",
+  "mcp": {
+    "server": "python -m semantica.mcp_server",
+    "transport": "stdio"
+  },
+  "openclaw": {
+    "mcporter": {
+      "mcpServers": {
+        "semantica": {
+          "command": "python",
+          "args": ["-m", "semantica.mcp_server"],
+          "transport": "stdio"
+        }
+      }
+    }
+  }
+}