Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/softspark/ai-toolkit/agent-creatornpx skills add softspark/ai-toolkit --skill agent-creatorgit clone --depth 1 https://github.com/softspark/ai-toolkitWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00031 | $0.00958 |
| Opus 5 | $0.00015 | $0.00479 |
| Sonnet 5 | $0.00006 | $0.00192 |
| Haiku 4.5 | $0.00003 | $0.00096 |
Grade A, and why
agent-creator scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 99 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Creator
$ARGUMENTS
Create a new specialized agent following ai-toolkit conventions.
Workflow
- Capture role -- what problem space should the agent own?
- Define triggers -- which keywords or task types should route to this agent?
- Choose tools -- minimal tool set, least privilege first
- Choose model --
opusfor deep reasoning,sonnetfor lighter pattern work - Map supporting skills -- which knowledge skills should the agent reference?
- Write instructions -- capabilities, constraints, escalation rules, deliverables
- Validate -- frontmatter, naming, skills references, tool whitelist
Required Frontmatter
---
name: agent-name
description: "When to use this agent. Triggers: keyword1, keyword2."
tools: Read, Write, Edit
model: sonnet
skills: skill-one, skill-two
---
Authoring Rules
- MUST match filename and
name:using lowercase-hyphen format — drift breaks routing - MUST include an explicit
Triggers:list in the description so the router can dispatch deterministically - NEVER reference skills that do not exist — either create the dependency first or drop the reference
- NEVER grant write access to
.claude/agents/— that authority belongs tometa-architectalone - CRITICAL: avoid tool bloat. Every extra tool widens blast radius; start from
Readand justify additions one by one - Give the agent a clear boundary: what it owns and what it must escalate
- Prefer specialized, narrow responsibility over generic "do everything" agents
Agent Skeleton
---
name: {agent-name}
description: "When to use this agent. Triggers: keyword1, keyword2."
tools: Read, Edit
model: sonnet
skills: relevant-skill
---
You are a specialized agent for {domain}.
## Responsibilities
- Responsibility one
- Responsibility two
## Constraints
- Do not edit files outside owned scope unless required
- Escalate security, data-loss, or architecture risks
## Deliverables
- Clear findings
- Specific edits or recommendations
- Validation notes
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 99 lines · 31 tokens per session scan A 7b53dda7858e
agent-creator is a skill published in the GitHub repository softspark/ai-toolkit (167 stars, last pushed 4d ago), licensed Apache-2.0. It adds 31 tokens to every session and 958 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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