agent-persona-builder SKILL.md skillA
agent-persona-builder from the-utopia-studio/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add the-utopia-studio/skills/agent-persona-builder@git:20260806.73fec06Pins git:20260806.73fec06 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- the-utopia-studio/skills
- Path
plugins/utopia-founder-productivity/skills/agent-persona-builder/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260806.73fec06, committed Aug 6, 2026
- Size
- 9,305 bytes
- Repository stars
- 7
- License
- Apache-2.0
Design persistent AI agent personas with distinct voices, durable memory, and clear operating rules. Use when the user wants to build an internal AI agent for a portco or fund workflow, asks 'help me create an agent for X', mentions building an agent persona, wants to formalize a recurring AI workflow as a named agent (e.g. 'Ada the DD analyst'), or asks how to design agents that don't sound generic. Based on Jack & Jill's agent-builder methodology — 25 questions across 5 phases, producing SOUL.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Agent Persona Builder A framework for designing internal AI agents with distinct, persistent personalities. Adapted from [Jack & Jill's agent-builder-skill](https://github.com/Jack-and-Jill-AI/Jack_and_Jill_AI_Guides/blob/main/agent-builder-skill.md). ## When to use this - Building a new AI agent for a Utopia workflow or portco (e.g., a DD analyst, a deck builder, a customer support bot) - Formalizing a recurring "Claude do X" pattern into a named, persistent agent - Designing portco agents as part of M6 Product or M9 Ops in the Cobuild curriculum - The user says any of: "build an agent for…", "design an AI persona", "help me create [name]", "turn this workflow into an agent" ## What this skill produces For each agent, four core files in `agents/<name>/`: | File | Purpose | |------|---------| | `SOUL.md` | Personality, voice, signature phrases, anti-patterns | | `AGENTS.md` | Operating manual — triggers, permissions, services, workflows, escalation | | `MEMORY.md` | Durable cross-session knowledge — URLs, workarounds, gotchas, contacts | | `BOOTSTRAP.md` | First-boot orientation guide (archived after setup) | …
Read the whole file at its exact version.
How to install
mdr add the-utopia-studio/skills/agent-persona-builder@sha256:ff14348a44c245e1The line at the top of this page pins the label git:20260806.73fec06, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_xwrs2n66x2tkt4z5)
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Versions
The registry has recorded 1 version of this file, committed on Aug 6, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (9305 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
the-utopia-studio/skills · 7 stars · license Apache-2.0 · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_xwrs2n66x2tkt4z5 GET https://markdownregistry.com/api/v1/resolve?ref=the-utopia-studio/skills/agent-persona-builder GET https://markdownregistry.com/api/v1/blob/ff14348a44c245e1747073c843cb39ad2af4556a64fafd00347d7faa2995c198
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.