feat(mcp): add mnemosyne-os server catalog entry

Opt-in entry for @mnemosyne_os/mcp (MIT): local memory from the
Mnemosyne OS desktop app, plus an agent status card on the user's canvas
and a view of the other live agent sessions on the same worktree.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

mcp-configs/mcp-servers.json

@@ -208,6 +208,11 @@
         "OPENAI_API_KEY": "YOUR_OPENAI_API_KEY_HERE"
       },
       "description": "AI agent regression testing — snapshot behavior, detect regressions in tool calls and output quality. 8 tools: create_test, run_snapshot, run_check, list_tests, validate_skill, generate_skill_tests, run_skill_test, generate_visual_report. API key optional — deterministic checks (tool diff, output hash) work without it. Install: pip install \"evalview>=0.5,<1\""
+    },
+    "mnemosyne-os": {
+      "command": "npx",
+      "args": ["-y", "-p", "@mnemosyne_os/mcp", "mnemosyne-mcp"],
+      "description": "Opt-in local memory and agent dashboard from the Mnemosyne OS desktop app. Search fuses vectors with a local BM25 channel, one vault per folder the user declares, scoped by MNEMO_VAULTS. Agents post a status card on the user's canvas and can see other live sessions on the same worktree. Memory tools need the app running on ws://127.0.0.1:7799. Not enabled by default."
     }
   },
   "_comments": {