Source: https://fablerlabs.com/agent-kit > Templates, guardrails, and field notes for running an AI coding agent unattended — a fill-in-the-blanks constitution, an amnesia-proof memory protocol, and safety rails. Distilled from a live autonomous agent. $29 one-time, free updates. [Home](https://fablerlabs.com/) → [Products](https://fablerlabs.com/#products) → Autonomous Agent Starter Kit New · v1 # Autonomous Agent Starter Kit A cron job that calls an LLM is easy. An agent you can *leave alone for a week* is not. This is the constitution, memory protocol, and safety rails for running an AI coding agent **unattended** — distilled from one that actually does. $29 one-time · free updates · instant download Provider-neutral — works with Claude Code or any agentic coding tool. You supply the runtime; this supplies the rules, memory discipline, and safety engineering around it. [Get the kit — $29 →](https://buy.stripe.com/fZu14mgzj4OX6MNb6l9Zm01?client_reference_id=agent-kit-direct&utm_source=fablerlabs&utm_medium=owned-agent-kit&utm_campaign=agent-kit-evidence) [See the agent it came from](https://fablerlabs.com/about) Secure checkout by Stripe. Instant download the moment your payment clears — free updates for life. ## The two things that break an unattended agent - **Amnesia.** Each session starts cold. Without a disciplined memory loop the agent re-solves solved problems, forgets what it shipped, and loses uncommitted work when a session dies mid-task. - **No adult in the room.** With no human in the loop, one prompt-injection in a scraped page, one un-capped spend, or one "I'll just pretend to be a person to get past this signup" can quietly torch the owner's money, data, or legal standing. The kit is the distilled answer to both. ## What's inside 11 files — plain Markdown plus ready-to-use templates, nothing to install, nothing to run. | File | What you get | | --- | --- | | **CONSTITUTION.template.md** | The centerpiece: a fill-in-the-blanks system prompt for an unattended agent, with `<PLACEHOLDER>` fields and inline `> why:` notes on every non-obvious rule, so you can adapt it intelligently. | | **MEMORY-PROTOCOL.md** | How to give an amnesiac agent continuity: the STATE / journal / ledger / commit loop, what belongs in each file, and the failure modes (state bloat, stale STATE, lost uncommitted work). | | **SAFETY-RAILS.md** | Prompt-injection defense with worked examples, secret hygiene, the never-impersonate-a-human rule and why it protects you legally, and tiered spend guardrails with an un-fakeable approval code. | | **SUPERVISOR-PATTERN.md** | A vendor-neutral blueprint for the outer loop: a scheduler, a health file, a heartbeat/failure counter, a STOP-file kill switch, inbox message delivery, and privilege separation so the agent can't edit its own guardrails. | | **templates/** | Ready-to-use `STATE.template.md`, `journal-entry.template.md`, and `LEDGER.template.csv`. | | **checklists/** | Copy-paste `session-start.md` and `session-end.md`. | ## Who it's for Developers standing up a self-driving agent: a coding assistant on a cron, an autonomous ops or research bot, a "build a small business while I sleep" experiment. If a human approves every action, you don't need this. If the agent acts alone, you need every file in here. ## Get started in 20 minutes Copy `CONSTITUTION.template.md` to your agent's `CLAUDE.md`, replace every `<PLACEHOLDER>`, drop in the memory templates, wire the supervisor from the blueprint, and do one hand-triggered dry run. The README walks each step. ## Why trust it This isn't theory scraped from blog posts. It's distilled from an autonomous agent that actually runs this way — waking on a timer, keeping its own books, and shipping unattended. Every rule was paid for by a failure mode we hit. You can [watch that agent live](https://fablerlabs.com/about). Everything is plain Markdown you can read before you use it — no telemetry, no dependencies. Not useful to you? Email [support@fablerlabs.com](mailto:support@fablerlabs.com) — see the [refund policy](https://fablerlabs.com/refund). ## Works with - **[Constitution Pack](https://fablerlabs.com/constitution-pack)** (governance layer) — this kit ships one generic, fill-in-the-blanks constitution template; that pack gives you seven already written for common business archetypes, plus a deeper adaptation guide. Many buyers use both. - **[Security Pack](https://fablerlabs.com/security-pack)** (hardening layer) — once your agent is running, add a dedicated adversarial security-review pass — subagents and slash commands that catch injection, IDOR, and secret leaks before they reach a PR. - **[Mainspring](https://fablerlabs.com/mainspring)** (the OSS runtime) — this kit's `SUPERVISOR-PATTERN.md` and `MEMORY-PROTOCOL.md` are a blueprint you wire up yourself; Mainspring is an open-source, early-stage implementation of that same loop — constitution, timed sessions, ledger, approval queue — for any LLM brain. ## FAQ **How is this different from the Constitution Pack?** They're complementary. This kit is the runtime scaffolding around an unattended agent — memory protocol, safety rails, supervisor blueprint — plus one fill-in-the-blanks constitution template you adapt yourself. The [Constitution Pack](https://fablerlabs.com/constitution-pack) is seven complete, business-specific constitutions already written for common archetypes, plus a deeper adaptation guide. Many buyers use both: this kit for the harness, that pack for the governing document itself. --- ## Not ready to buy? Stay in the loop Drop your email for new templates, product updates, and the occasional discount — no spam. Or grab the kit above and start today, and browse the free [guides library](https://fablerlabs.com/guides) meanwhile. Also from Fabler Labs: [Constitution Pack](https://fablerlabs.com/constitution-pack) · [AI Coding Security Pack](https://fablerlabs.com/security-pack) · [Mainspring (the open-source runtime)](https://fablerlabs.com/mainspring) · [the current story](https://fablerlabs.com/story) Related free reading: [the field guide](https://fablerlabs.com/field-guide) · [CLAUDE.md example](https://fablerlabs.com/claude-md-example) · [how this business runs itself](https://fablerlabs.com/about) · [all guides →](https://fablerlabs.com/guides)