Add Mnemon

/add-mnemon

Add mnemon persistent memory to your NanoClaw installation. After running this skill, every agent session will have access to a per-group memory graph that persists across conversations.

Architecture

Host                              Container
~/.mnemon/data/{group}/ ──rw──→ /home/node/.mnemon/data/default/  (private)
~/.mnemon/data/global/  ──ro──→ /home/node/.mnemon/data/global/   (shared)

Each group gets its own isolated mnemon store. An optional global store provides shared read-only knowledge across all groups.

Phase 1: Pre-flight

1. Verify mnemon is installed on the host:

   mnemon --version

   If not installed:

   • Recommended (npm): npm install --global @mnemon-dev/mnemon
   • Alternative (Homebrew): brew install --cask mnemon-dev/tap/mnemon

2. Verify the container image exists:

   docker image inspect nanoclaw-agent:latest >/dev/null 2>&1 && echo "OK"

3. Fetch the latest mnemon version for the Dockerfile:

   curl -s https://api.github.com/repos/mnemon-dev/mnemon/releases/latest | grep -o '"tag_name": "v[^"]*"' | cut -d'"' -f4 | sed 's/^v//'

Phase 2: Apply Code Changes

2a. Install mnemon in the container image

File: container/Dockerfile

Add the following block after the apt-get install section and before the npm install -g line. Replace 0.1.1 with the version from Phase 1 step 3:

# Install mnemon for persistent agent memory
ARG MNEMON_VERSION=0.1.1
RUN ARCH=$(dpkg --print-architecture) && \
    curl -fsSL "https://github.com/mnemon-dev/mnemon/releases/download/v${MNEMON_VERSION}/mnemon_${MNEMON_VERSION}_linux_${ARCH}.tar.gz" \
    | tar -xz -C /usr/local/bin mnemon && \
    chmod +x /usr/local/bin/mnemon

This works for both amd64 and arm64 architectures.

2b. Add the container skill

File: container/skills/mnemon/SKILL.md

Create this file with the mnemon container skill content. This skill teaches the agent inside the container when and how to use mnemon. It should include:

• Memory stores section: Explain that the default store is per-group (private, read-write) and the global store is shared (read-only, accessed via --store global --readonly).
• Recall guide: Default recall on every new user message. Use mnemon recall "<query>" --limit 5. Also check the global store: mnemon recall "<query>" --store global --readonly --limit 5. Craft focused keyword-rich queries.
• Remember guide: Decision tree — Step 1: Does this exchange contain a user directive, reasoning conclusion, or durable observed state? Step 2: Does a memory already exist (create/update/skip)? Step 3: Is it worth storing?
• Workflow: remember → link (evaluate semantic/causal candidates with judgment) → recall.
• Commands: Full mnemon command reference (remember, link, recall, search, forget, related, gc, status, log).
• Guardrails: Never store secrets. Never write to the global store. Categories: preference, decision, insight, fact, context. Max 8,000 chars per insight.

2c. Add volume mounts for mnemon data

File: src/container-runner.ts

In the function that builds volume mounts (where the existing group folder and Claude session mounts are defined), add two new mounts after the Claude sessions mount:

// Per-group mnemon memory store (private, read-write)
const groupMnemonDir = path.join(homedir(), '.mnemon', 'data', group.folder);
fs.mkdirSync(groupMnemonDir, { recursive: true });
mounts.push({
  hostPath: groupMnemonDir,
  containerPath: '/home/node/.mnemon/data/default',
  readonly: false,
});

// Global shared mnemon memory (read-only, optional)
const globalMnemonDir = path.join(homedir(), '.mnemon', 'data', 'global');
if (fs.existsSync(globalMnemonDir)) {
  mounts.push({
    hostPath: globalMnemonDir,
    containerPath: '/home/node/.mnemon/data/global',
    readonly: true,
  });
}

Adapt the mount syntax to match the existing pattern in container-runner.ts (it may use string format like hostPath:containerPath:ro or an object format — match whichever the file uses).

Important: The mkdirSync call ensures the per-group mnemon directory exists on the host before the container starts, preventing mount failures.

2d. Add lifecycle hook scripts

Create container/hooks/mnemon/ with four shell scripts. These run inside the container at Claude Code lifecycle events to actively drive memory operations.

File: container/hooks/mnemon/prime.sh

#!/bin/bash
# mnemon SessionStart hook — report memory stats on session init.
STATS=$(mnemon status 2>/dev/null)
if [ -n "$STATS" ]; then
  INSIGHTS=$(echo "$STATS" | sed -n 's/.*"total_insights": *\([0-9]*\).*/\1/p' | head -1)
  EDGES=$(echo "$STATS" | sed -n 's/.*"edge_count": *\([0-9]*\).*/\1/p' | head -1)
  echo "[mnemon] Memory active (${INSIGHTS:-0} insights, ${EDGES:-0} edges)."
else
  echo "[mnemon] Memory active."
fi

File: container/hooks/mnemon/user_prompt.sh

#!/bin/bash
# mnemon UserPromptSubmit hook — remind agent to evaluate recall/remember.
echo "[mnemon] Evaluate: recall needed? After responding, evaluate: remember needed?"

File: container/hooks/mnemon/stop.sh

#!/bin/bash
# mnemon Stop hook — remind agent to consider remember after responding.
INPUT=$(cat)
MSG=$(echo "$INPUT" | jq -r '.last_assistant_message // ""' 2>/dev/null)
if echo "$MSG" | grep -qiE "mnemon remember|sub-agent.*remember|Stored.*imp="; then
  exit 0
fi
echo "[mnemon] Consider: does this exchange warrant a remember sub-agent?"

File: container/hooks/mnemon/compact.sh

#!/bin/bash
# mnemon PreCompact hook — save key insights before context compaction.
echo "[mnemon] Context compaction starting. Review this session and remember the most valuable insights (up to 5) before context is compressed. Delegate to Task sub-agents now."

Make all scripts executable: chmod +x container/hooks/mnemon/*.sh

2e. Copy hooks into container and register in settings.json

File: container/Dockerfile

Add after the mnemon binary install block:

# Copy mnemon hook scripts
COPY hooks/mnemon/ /app/hooks/mnemon/
RUN chmod +x /app/hooks/mnemon/*.sh

File: src/container-runner.ts

In the block where settings.json is created for each group session (look for writeFileSync with settings.json), merge mnemon hooks into the settings object:

// Register mnemon lifecycle hooks
const mnemonHooks = {
  SessionStart: [{
    hooks: [{ type: 'command', command: '/app/hooks/mnemon/prime.sh' }]
  }],
  UserPromptSubmit: [{
    hooks: [{ type: 'command', command: '/app/hooks/mnemon/user_prompt.sh' }]
  }],
  Stop: [{
    hooks: [{ type: 'command', command: '/app/hooks/mnemon/stop.sh' }]
  }],
  PreCompact: [{
    hooks: [{ type: 'command', command: '/app/hooks/mnemon/compact.sh' }]
  }],
};

// Merge into existing settings.hooks (preserve any existing hooks)
const existingHooks = settings.hooks || {};
for (const [event, entries] of Object.entries(mnemonHooks)) {
  existingHooks[event] = [...(existingHooks[event] || []), ...entries];
}
settings.hooks = existingHooks;

Adapt this to match the existing settings.json construction pattern in container-runner.ts.