buildagent

name	BuildAgent
version	0.1.0
description	Create, validate, or audit agent definitions. USE WHEN create agent, new agent, build agent, scaffold agent, validate agent, audit agents, agent conventions, agent frontmatter.

BuildAgent

Scaffold, validate, and audit agent markdown files following forge conventions. Agents are markdown files with frontmatter that deploy to provider-specific directories via forge install.

Workflow Routing

Workflow	Trigger	Section
Create	"create agent", "new agent", "build agent"	Create Workflow
Validate	"validate agent", "check agent"	Validate Workflow
Audit	"audit agents", "check all agents"	Audit Workflow

Agent Conventions

Naming

All agent identifiers use PascalCase with no spaces, hyphens, or abbreviations:

Field	Format	Example
name	PascalCase	SecurityArchitect
Source filename	PascalCase.md	SecurityArchitect.md
Deployed filename	PascalCase.md	~/.claude/agents/SecurityArchitect.md
Task subagent_type	PascalCase	subagent_type: "SecurityArchitect"

Rules:

• No spaces: GameMaster not Game Master
• No hyphens: SecurityArchitect not security-architect
• No abbreviations: DocumentationWriter not DocWriter
• Compound terms keep internal caps: DevOps stays DevOps
• Single words capitalize first letter: Ghostwriter, Opponent

Where Agents Live

Location	Purpose
agents/	Module agents (shipped with the module)
User vault workspace	Personal agents

An agent is a single .md file in agents/: flat directory, no subdirectories. Agent name must be unique across all locations -- sync overwrites by name.

Module Agent Frontmatter

Module agents use flat frontmatter -- deployment config (model, tools) lives in defaults.yaml, not in the agent file:

---
name: AgentName
description: "Role -- capabilities. USE WHEN trigger phrases."
version: 0.1.0
---

Field reference:

Field	Required	Notes
name	Yes	PascalCase, matches filename
description	Yes	Pattern: "Role -- capabilities. USE WHEN triggers."
version	Yes	Semantic version

For council/team agents, include a scope note in description.

Claude Code accepts additional frontmatter fields for personal agents (model, tools, disallowedTools, permissionMode, maxTurns, effort, skills, memory, isolation, color, hooks, mcpServers; see Sources). Module agents keep deployment config in defaults.yaml.

Model and tool assignments live in defaults.yaml (map format, keyed by agent name):

agents:
    SecurityArchitect:
        model: fast
        tools: Read, Grep, Glob, Bash

Semantic model tiers:

Tier	Maps to	Use for
fast	sonnet / gemini-2.0-flash	Implementation, analysis, most specialist work
strong	opus / gemini-2.5-pro	Deep reasoning, critical decisions

Model tiers resolve to concrete model IDs via the providers: section in defaults.yaml. Each provider maps fast and strong to its own model.

Body Structure

> One-line summary of role and scope. Shipped with forge-{module}.

## Role

2-3 sentences. Who is this agent? What perspective does it bring?

## Expertise

- Domain 1
- Domain 2
- Domain 3
- Domain 4
- Domain 5

## Instructions

### When Reviewing Code (or contextual heading)

1. Numbered steps. Concrete, actionable, ordered.
2. ...

### When Designing or Planning (or contextual heading)

1. Numbered steps for alternative modes.
2. ...

## Output Format

Structured template for findings using markdown headings.

## Constraints

- Stay focused on your assigned domain -- don't review areas outside your expertise
- Reference specific files and line numbers
- If your domain is solid, say so -- don't invent problems
- Every critique must include a concrete suggestion
- Communicate findings to the team lead via SendMessage when done

Body guidelines:

• Lead with a blockquote summary (> ...). End with "Shipped with forge-{module}." for module agents.
• Keep Role to 2-3 sentences. Don't pad with generic filler.
• Expertise: 4-6 concrete domains, not abstract qualities
• Instructions: numbered, actionable, in priority order
• Total body: 50-80 lines. Under 40 is too thin, over 100 is bloated.

Mandatory constraint clauses:

• Honesty clause: "If the [domain] is solid, say so -- don't invent problems. Every critique must include a concrete suggestion."
• Team communication clause (council/team agents): "Communicate findings to the team lead via SendMessage when done."

Example data rule: All examples must use synthetic data (Jane Doe, [e-mail], Acme Corp). Never use real PII -- agent files deploy to public repos.

Deployment

Module agents deploy via forge install:

make install                              # all providers
forge install --scope user                # user-level install

Provider-specific behaviour:

Provider	Format	Notes
Claude	.md	Frontmatter + body, model/tools from defaults.yaml
Gemini	.md	Name slugified (e.g., code-helper), tools mapped to Gemini equivalents
Codex	.toml	TOML config in .codex/config.toml, agent prompt in .codex/agents/
OpenCode	.md	Same format as Claude

Tool mapping to provider equivalents happens automatically. Provenance is recorded in .provenance/ sidecar directories next to the deployed files, and a .manifest dotfile at the target root tracks deployment state.

After creating or modifying an agent, redeploy to pick up changes.

---

Create Workflow

Step 1: Understand the agent

Determine:

1. What role does this agent fill?
2. What domain expertise does it need?
3. Is it standalone or part of a team (like council)?
4. What tools does it need? (Read-only? Full access?)
5. What model tier? (fast for most work, strong for reasoning)

If unclear, ask using AskUserQuestion.

Step 2: Write the agent file

Write agents/AgentName.md following Agent Conventions.

Step 3: Deploy

make install

Step 4: Verify

The agent will be available as a subagent_type after restarting the session.

---

Validate Workflow

Step 1: Check frontmatter

• name present and uses PascalCase
• name has no spaces, hyphens, or abbreviations
• name matches the filename (without .md)
• description follows pattern: "Role -- capabilities. USE WHEN triggers."
• version present

Step 2: Check body structure

• Starts with blockquote summary (> ...)
• Has Role section (2-3 sentences)
• Has Expertise section (4-6 items)
• Has Instructions with actionable numbered steps
• Has Output Format with structured template
• Has Constraints with scope boundaries
• Constraints include honesty clause
• No real PII in examples
• Total length is 50-80 lines

Step 3: Report

COMPLIANT or NON-COMPLIANT with specific issues and fixes.

---

Audit Workflow

Step 1: Scan all agent sources

ls agents/*.md

Step 2: Check each agent

Run the Validate workflow checklist against every agent. Report:

Agent	Name OK	FM OK	Body OK	Issues
Developer	Y	Y	Y	--
...	...	...	...	...

Step 3: Check for conflicts

• Duplicate name values
• Names that don't follow PascalCase
• For module agents: verify defaults.yaml lists all agents in roster
• For module agents: verify deployed model/tools match defaults.yaml

Step 4: Report summary

Total agents, compliant count, issues found, recommended fixes.

---

Sources

• https://code.claude.com/docs/en/agents
• https://github.com/anthropics/claude-code/blob/main/plugins/README.md
• https://github.com/google-gemini/gemini-cli