Pi Mom

Pi Mom (Master Of Mischief)

Grounding

1. pi-mono/packages/mom/README.md — features, workspace setup, memory structure (log.jsonl vs context.jsonl), Events system.
2. pi-mono/packages/mom/docs/events.md — detailed event JSON schema and usage.
3. pi-mono/packages/mom/docs/sandbox.md — Docker vs host mode security isolation details.
4. pi-mono/packages/mom/docs/slack-bot-minimal-guide.md — Slack app manifest and permissions.
5. pi-mono/packages/mom/docs/artifacts-server.md — Express+WebSocket artifacts server, Cloudflare Tunnel for public HTTPS, file watching with chokidar, live reload, path traversal protection, date-prefixed artifact organization.
6. pi-mono/packages/mom/docs/new.md — Multi-platform redesign: PlatformAdapter interface (Slack/Discord/CLI adapters), MomCustomTool interface with invoke_tool dispatch, bubblewrap channel isolation, unified ChannelMessage format, per-adapter config.
7. pi-mono/packages/mom/docs/v86.md — v86 x86 emulator sandbox evaluation: Alpine Linux in WebAssembly, 9p filesystem for host-guest exchange, state save/restore (~2s), outbound networking.

Invariants

• Dual-File History: log.jsonl is the source of truth (append-only); context.jsonl is the compacted view sent to the LLM.
• Workspace Isolation: Mom runs on the host by default (no isolation). Docker mode (--sandbox=docker:) is recommended for security — it isolates tool execution to a container where only the data/ directory is mounted to /workspace.
• Event Paths: On the host, event files live in data/events/. Inside the Docker sandbox and events.md, that same mounted directory is referred to as /workspace/events/ or workspace/events/.
• Event Limits: A maximum of 5 events can be queued per channel. Events use unique filenames to avoid overwrites.
• Artifacts Server: Runs Express on port 8080 with Cloudflare Tunnel for public URLs; file watching is recursive via chokidar; WebSocket live reload via ?ws=true parameter — pi-mono/packages/mom/docs/artifacts-server.md.
• Multi-Platform Design: Design doc defines PlatformAdapter interface (start, stop, getChannels, sendMessage, etc.), planned adapters (Slack, Discord, CLI), MomCustomTool interface for host-side tool execution via invoke_tool, and bubblewrap per-channel isolation — pi-mono/packages/mom/docs/new.md.
• Custom Tool Discovery: Custom tools are discovered from data/tools/**/index.ts (workspace-local) and ~/.pi/mom/tools/**/index.ts (global), loaded via jiti — pi-mono/packages/mom/docs/new.md.

Workflows

• Create Skill: Add a SKILL.md file and scripts to /workspace/skills/ (global) or /workspace//skills/ (channel-specific).
• Schedule Task: Write a JSON event file to data/events/ on the host (mounted as /workspace/events/ inside Docker) using immediate, one-shot, or periodic event JSON.
• Compaction: When context exceeds limits, older messages are summarized into a compaction event.
• Serve artifacts: Read docs/artifacts-server.md for Express+Tunnel setup and start-server.sh bootstrap.
• Custom host-side tools: Read docs/new.md MomCustomTool section for factory pattern, ToolAPI, and tool discovery paths.

Anti-patterns

• Do not suggest manual dependency installation on the host; Mom self-manages and installs her own tools (e.g., apk add, brew install) within her sandbox.
• Avoid using Host mode unless explicitly requested due to security risks. Use docker mode.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: romiluz13
• Source: romiluz13/pi-agent-skills
• License: MIT

Install and usage instructions live in the source repository linked above.