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Building a personal assistant with OpenClaw

OpenClaw is a WhatsApp + Telegram + Discord + iMessage gateway for Pi agents. Plugins add Mattermost. This guide is the “personal assistant” setup: one dedicated WhatsApp number that behaves like your always-on agent.

⚠️ Safety first

You’re putting an agent in a position to:
  • run commands on your machine (depending on your Pi tool setup)
  • read/write files in your workspace
  • send messages back out via WhatsApp/Telegram/Discord/Mattermost (plugin)
Start conservative:
  • Always set channels.whatsapp.allowFrom (never run open-to-the-world on your personal Mac).
  • Use a dedicated WhatsApp number for the assistant.
  • Heartbeats now default to every 30 minutes. Disable until you trust the setup by setting agents.defaults.heartbeat.every: "0m".

Prerequisites

  • OpenClaw installed and onboarded — see Getting Started if you haven’t done this yet
  • A second phone number (SIM/eSIM/prepaid) for the assistant
You want this: If you link your personal WhatsApp to OpenClaw, every message to you becomes “agent input”. That’s rarely what you want.

5-minute quick start

  1. Pair WhatsApp Web (shows QR; scan with the assistant phone):
  1. Start the Gateway (leave it running):
  1. Put a minimal config in ~/.openclaw/openclaw.json:
Now message the assistant number from your allowlisted phone. When onboarding finishes, we auto-open the dashboard and print a clean (non-tokenized) link. If it prompts for auth, paste the token from gateway.auth.token into Control UI settings. To reopen later: openclaw dashboard.

Give the agent a workspace (AGENTS)

OpenClaw reads operating instructions and “memory” from its workspace directory. By default, OpenClaw uses ~/.openclaw/workspace as the agent workspace, and will create it (plus starter AGENTS.md, SOUL.md, TOOLS.md, IDENTITY.md, USER.md, HEARTBEAT.md) automatically on setup/first agent run. BOOTSTRAP.md is only created when the workspace is brand new (it should not come back after you delete it). MEMORY.md is optional (not auto-created); when present, it is loaded for normal sessions. Subagent sessions only inject AGENTS.md and TOOLS.md. Tip: treat this folder like OpenClaw’s “memory” and make it a git repo (ideally private) so your AGENTS.md + memory files are backed up. If git is installed, brand-new workspaces are auto-initialized.
Full workspace layout + backup guide: Agent workspace Memory workflow: Memory Optional: choose a different workspace with agents.defaults.workspace (supports ~).
If you already ship your own workspace files from a repo, you can disable bootstrap file creation entirely:

The config that turns it into “an assistant”

OpenClaw defaults to a good assistant setup, but you’ll usually want to tune:
  • persona/instructions in SOUL.md
  • thinking defaults (if desired)
  • heartbeats (once you trust it)
Example:

Sessions and memory

  • Session files: ~/.openclaw/agents/<agentId>/sessions/{{SessionId}}.jsonl
  • Session metadata (token usage, last route, etc): ~/.openclaw/agents/<agentId>/sessions/sessions.json (legacy: ~/.openclaw/sessions/sessions.json)
  • /new or /reset starts a fresh session for that chat (configurable via resetTriggers). If sent alone, the agent replies with a short hello to confirm the reset.
  • /compact [instructions] compacts the session context and reports the remaining context budget.

Heartbeats (proactive mode)

By default, OpenClaw runs a heartbeat every 30 minutes with the prompt: Read HEARTBEAT.md if it exists (workspace context). Follow it strictly. Do not infer or repeat old tasks from prior chats. If nothing needs attention, reply HEARTBEAT_OK. Set agents.defaults.heartbeat.every: "0m" to disable.
  • If HEARTBEAT.md exists but is effectively empty (only blank lines and markdown headers like # Heading), OpenClaw skips the heartbeat run to save API calls.
  • If the file is missing, the heartbeat still runs and the model decides what to do.
  • If the agent replies with HEARTBEAT_OK (optionally with short padding; see agents.defaults.heartbeat.ackMaxChars), OpenClaw suppresses outbound delivery for that heartbeat.
  • By default, heartbeat delivery to DM-style user:<id> targets is allowed. Set agents.defaults.heartbeat.directPolicy: "block" to suppress direct-target delivery while keeping heartbeat runs active.
  • Heartbeats run full agent turns — shorter intervals burn more tokens.

Media in and out

Inbound attachments (images/audio/docs) can be surfaced to your command via templates:
  • {{MediaPath}} (local temp file path)
  • {{MediaUrl}} (pseudo-URL)
  • {{Transcript}} (if audio transcription is enabled)
Outbound attachments from the agent: include MEDIA:<path-or-url> on its own line (no spaces). Example:
OpenClaw extracts these and sends them as media alongside the text.

Operations checklist

Logs live under /tmp/openclaw/ (default: openclaw-YYYY-MM-DD.log).

Next steps