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 skills add agentfront/frontmcp --skill directory-basedgit clone --depth 1 https://github.com/agentfront/frontmcpWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/agentfront/frontmcp/directory-based)<a href="https://agentmods.dev/skills/agentfront/frontmcp/directory-based"><img src="https://agentmods.dev/badge/skills/agentfront/frontmcp/directory-based/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/agentfront/frontmcp/directory-based"><img src="https://agentmods.dev/badge/skills/agentfront/frontmcp/directory-based.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What 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 5.1 | $0.00028 | $0.00753 |
| Opus 5.5 | $0.00011 | $0.00301 |
| Sonnet 5.5 | $0.00006 | $0.00151 |
| Haiku 4.5 | $0.00003 | $0.00075 |
Grade A, and why
directory-based-skill 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 14d 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 — 105 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Directory-Based Skill with File References and Registration
A skill loaded from a directory structure with SKILL.md frontmatter, plus file-based and URL-based instruction sources.
Code
skills/
coding-standards/
SKILL.md # Instructions with YAML frontmatter
scripts/
lint-check.sh # Helper scripts referenced in instructions
references/
patterns.md # Reference documentation appended to context
assets/
diagram.png # Visual assets
## <!-- skills/coding-standards/SKILL.md -->
name: coding-standards
description: Project coding standards and patterns
tags: [standards, conventions, quality]
parameters:
- name: language
description: Target programming language
type: string
default: typescript
examples:
- scenario: Apply coding standards to a new module
expected-outcome: Code follows all project conventions
---
# Coding Standards
Follow these standards when writing code for this project...
// src/skills/load-skills.ts
import { skill, skillDir } from '@frontmcp/sdk';
// Load a directory-based skill with bundled scripts, references, and assets
const CodingStandards = await skillDir('./skills/coding-standards');
// File-based instructions -- path resolves relative to this file's directory
const DeployGuide = skill({
name: 'deploy-guide',
description: 'Step-by-step deployment checklist',
instructions: { file: './docs/deploy-guide.md' }, // resolves to src/skills/docs/deploy-guide.md
});
// src/server.ts
import { App, FrontMcp, Skill, SkillContext } from '@frontmcp/sdk';
// URL-based instructions fetched at build time
@Skill({
name: 'api-standards',
description: 'REST API design standards',
instructions: { url: 'https://docs.example.com/standards/api-design.md' },
})
class ApiStandardsSkill extends SkillContext {}
@App({
name: 'standards-app',
skills: [CodingStandards, DeployGuide, ApiStandardsSkill],
})
class StandardsApp {}
@FrontMcp({
info: { name: 'dev-server', version: '1.0.0' },
apps: [StandardsApp],
})
class DevServer {}
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.
- 14d ago Changed · -11 lines 6d4cc5fead37
- 1mo ago First seen · 116 lines · 28 tokens per session scan A 81e17c66eecc
directory-based-skill is a skill published in the GitHub repository agentfront/frontmcp (146 stars, last pushed today), licensed Apache-2.0. It adds 28 tokens to every session and 753 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-09-03.
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