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Add nucleus-brain plugin (persistent memory + cross-agent coordination)#54

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Add nucleus-brain plugin (persistent memory + cross-agent coordination)#54
eidetic-works wants to merge 1 commit into
xai-org:mainfrom
eidetic-works:add-nucleus-brain

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Summary

Adds the Nucleus Brain plugin to the Grok Build Plugin Marketplace catalog.

Nucleus Brain gives AI coding agents persistent memory, task management, and cross-agent coordination. Write memories (engrams) that survive across sessions, search past decisions, track tasks with depth scoring, and relay messages between AI agents working on the same project.

  • MCP server: https://relay.nucleusos.dev/mcp (OAuth 2.1, email-only consent, no API key needed)
  • Source repo: https://github.com/eidetic-works/nucleus-mcp (public)
  • SHA pin: bda2246f65ba9b5dc9b4feb087c23aaea113905a
  • License: AGPL-3.0

Plugin structure

.grok-plugin/plugin.json   # plugin metadata
.mcp.json                  # MCP server config (hosted, OAuth 2.1)
skills/nucleus-memory/SKILL.md   # memory/engram capability

Tools exposed (17 total)

nucleus_engrams (Memory & Engrams), nucleus_tasks (Task Management), nucleus_relay (Relay Messaging), nucleus_audit (Audit Log), nucleus_governance (Governance), nucleus_federation (Federation), nucleus_sessions (Session Management), nucleus_features (Feature Flags), nucleus_sync (Cross-Agent Sync), nucleus_orchestration (Orchestration), nucleus_telemetry (Telemetry), nucleus_slots (Slots & Sprints), nucleus_infra (Infrastructure), nucleus_agents (Agent Spawning), nucleus_route (Cost Router), nucleus_ccr_arm (CCR Arm), nucleus_relay_subscribe (Relay Subscription)

Catalog entry

{
  "name": "nucleus-brain",
  "description": "Persistent memory, task management, and cross-agent coordination for AI coding agents...",
  "category": "development",
  "source": {
    "source": "url",
    "url": "https://github.com/eidetic-works/nucleus-mcp.git",
    "sha": "bda2246f65ba9b5dc9b4feb087c23aaea113905a"
  },
  "homepage": "https://eidetic.works",
  "keywords": ["nucleus", "memory", "engrams", "persistent memory", "cross-agent", "relay", "tasks", "audit"],
  "domains": ["nucleusos.dev", "eidetic.works", "relay.nucleusos.dev"]
}

Test plan

  • grok plugin marketplace list shows nucleus-brain
  • grok plugin install nucleus-brain --trust installs without error
  • MCP server connects to relay.nucleusos.dev/mcp via OAuth 2.1
  • Search my engrams for decisions about authentication returns seeded demo data
  • What tasks are in my brain? returns seeded task list

Generated with Devin

Adds the Nucleus Brain plugin (persistent memory + cross-agent coordination
for AI coding agents) to the Grok Build Plugin Marketplace catalog.

Plugin source: https://github.com/eidetic-works/nucleus-mcp
SHA-pinned to bda2246f65ba9b5dc9b4feb087c23aaea113905a

The plugin bundles:
- .mcp.json: hosted MCP server at relay.nucleusos.dev/mcp (OAuth 2.1)
- .grok-plugin/plugin.json: plugin metadata
- skills/nucleus-memory/SKILL.md: memory/engram capability

Tools exposed (17 total): engrams (memory), tasks, relay (cross-agent
messaging), audit, governance, federation, sessions, features, sync,
orchestration, telemetry, slots, infra, agents, route, ccr_arm,
relay_subscribe.

Generated with [Devin](https://cli.devin.ai/docs)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
@eidetic-works eidetic-works requested a review from a team June 22, 2026 16:52
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