docs(readme): add GuyMannDude/mnemo-cortex to Memory and Context Systems

[GuyMannDude]

Summary

Adds GuyMannDude/mnemo-cortex to the Memory and Context Systems section.

Local-first persistent memory layer for OpenClaw and other MCP-capable agents. Ships with seven verified integration guides (Claude Code, Claude Desktop drag-and-drop bundle, OpenClaw one-line MCP config, LM Studio, AnythingLLM, Agent Zero, Ollama Desktop) plus The Lane Protocol session ritual and the mnemo-plan project-pad template.

Architectural fit alongside existing entries (Mem0, supermemory, claude-mem, etc.):

• Local-first and free; runs on the user's machine, $0/month
• Tiered retrieval (SQLite + FTS5 in front of embeddings) with optional Mem0 cloud fallback — "and Mem0, not instead of Mem0"
• Multi-agent native — per-agent lanes with cross-agent search gated by a per-session toggle
• Cross-agent dreaming — nightly synthesis pass

Linked discussion: #73

Public signal

• 45 GitHub stars, 11 forks (created 2026-03-05, ~8 weeks)
• Active development — commits today
• Submitted to Anthropic's Connectors Directory (2026-04-27)
• Listed on Glama and mcpservers directories
• Used in production by multiple OpenClaw agents (Rocky, Alice) since early 2026
• Companion repo mnemo-plan for the human-curated project-context layer

Affiliation

I am the maintainer.

Format checks

• Single bullet line, no wrapped sub-bullets
• Format: - [name](url) - short description. + GitHub stars badge
• Inserted at top of section per case-insensitive A-Z order (guymanndude < mem0)
• No 🎖️ or 💵 markers (free / community)
• Semantic commit prefix
• Linked issue in body (feat(list): add GuyMannDude/mnemo-cortex #73)

Note

CONTRIBUTING.md asks for issue approval before PR. I filed the issue as #73 and opened this PR pre-emptively for the line content + format check — happy to wait on the issue review or close this if you'd prefer the strict order. Either way works.

Closes #73