feat: add OpenClaw AtoCore capture plugin

openclaw-plugins/atocore-capture/README.md

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+# AtoCore Capture Plugin for OpenClaw
+
+Minimal OpenClaw plugin that mirrors Claude Code's `capture_stop.py` behavior:
+
+- watches user-triggered assistant turns
+- POSTs `prompt` + `response` to `POST /interactions`
+- sets `client="openclaw"`
+- sets `reinforce=true`
+- fails open on network or API errors
+
+## Config
+
+Optional plugin config:
+
+```json
+{
+  "baseUrl": "http://dalidou:8100",
+  "minPromptLength": 15,
+  "maxResponseLength": 50000
+}
+```
+
+If `baseUrl` is omitted, the plugin uses `ATOCORE_BASE_URL` or defaults to `http://dalidou:8100`.
+
+## Notes
+
+- Project detection is intentionally left empty for now. Unscoped capture is acceptable because AtoCore's extraction pipeline handles unscoped interactions.
+- Extraction is **not** part of the capture path. This plugin only records interactions and lets AtoCore reinforcement run automatically.
+- The plugin captures only user-triggered turns, not heartbeats or system-only runs.