skill-manifest-generator

skill-manifest-generator is a skill for Claude Code, Codex from SkillsCatalog/registry. It costs 27 tokens per session (676 once invoked), scanned A, original, MIT.

A tool for creating MANIFEST.json files for Agent Skills. These files list the skill's contents, record file hashes for integrity checks, detect external URLs, and summarize its structure.

In plain words
What is it for?
For generating or checking a manifest for a skill directory, including its file inventory, sizes, types, hashes, links, and folder structure.
Why use it?
It makes it easier to verify that a skill's files have not changed and to review what the skill contains before publishing or auditing it.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit For generating or checking a manifest for a skill directory, including its file inventory, sizes, types, hashes, links, and folder structure.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/skillscatalog/registry/skill-manifest-generator
Install

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.

Any agent
npx skills add SkillsCatalog/registry --skill skill-manifest-generator
Clone the repo
git clone --depth 1 https://github.com/SkillsCatalog/registry

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for skill-manifest-generator

README.md
[![agentmods](https://agentmods.dev/badge/skills/skillscatalog/registry/skill-manifest-generator/github.svg)](https://agentmods.dev/skills/skillscatalog/registry/skill-manifest-generator)
Your own site
<a href="https://agentmods.dev/skills/skillscatalog/registry/skill-manifest-generator"><img src="https://agentmods.dev/badge/skills/skillscatalog/registry/skill-manifest-generator/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.

agentmods 80×15 button for skill-manifest-generator

Your own site · 80×15
<a href="https://agentmods.dev/skills/skillscatalog/registry/skill-manifest-generator"><img src="https://agentmods.dev/badge/skills/skillscatalog/registry/skill-manifest-generator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 27 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 676 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00027 $0.00676
Opus 5 $0.00014 $0.00338
Sonnet 5 $0.00005 $0.00135
Haiku 4.5 $0.00003 $0.00068

Measured 9d ago against content hash 393d26785ba7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

skill-manifest-generator 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 9d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/generate_manifest.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/skill-manifest-generator/SKILL.md · 105 lines

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.

Instructions

Use this skill to generate a MANIFEST.json file for any Agent Skill directory. The manifest provides:

  • Integrity verification - SHA256 hashes for all files and an overall integrity hash
  • File inventory - Complete listing of files with sizes and types
  • External URL detection - URLs found in code that reference external resources
  • Structure analysis - Folder depth, file counts, and organization

When to Use

  • Before publishing a skill to a catalog
  • To verify a skill hasn't been modified
  • To audit external dependencies in a skill
  • To validate skill structure and compliance

How to Use

Run the manifest generator on a skill directory:

Generate a manifest for the skill at /path/to/my-skill

Or to verify an existing manifest:

Verify the manifest for /path/to/my-skill

Output

The generator creates a MANIFEST.json file in the skill root containing:

{
  "$schema": "https://agentskills.io/schemas/manifest.v1.json",
  "manifestVersion": "1.0",
  "generatedAt": "2025-01-15T10:30:00Z",
  "generator": "skill-manifest-generator/1.0.0",
  "skill": {
    "name": "my-skill",
    "version": "1.0.0"
  },
  "integrity": {
    "algorithm": "sha256",
    "hash": "a1b2c3d4..."
  },
  "files": [...],
  "externalReferences": [...],
  "structure": {...}
}

Examples

Generate a manifest:

User: Generate a manifest for the skill at ./pdf-tools
Agent: I'll generate a MANIFEST.json for the pdf-tools skill...
       [Runs generate_manifest.py]
       Created MANIFEST.json with:
       - 12 files inventoried
       - Integrity hash: sha256:abc123...
       - 2 external URLs detected
       - Max folder depth: 2

Verify a manifest:

User: Verify the manifest for ./pdf-tools
Agent: I'll verify the MANIFEST.json matches the current files...
       [Runs generate_manifest.py --verify]
       ✓ All 12 files match their recorded hashes
       ✓ No new untracked files found
       ✓ Integrity hash verified

Read the full file on GitHub · 105 lines

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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.

  1. 9d ago First seen · 105 lines · 27 tokens per session scan A 393d26785ba7

Subscribe to this mod's changes

skill-manifest-generator is a skill published in the GitHub repository SkillsCatalog/registry (1 stars, last pushed 8mo ago), licensed MIT. It adds 27 tokens to every session and 676 once invoked, about $0.0001 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 2026-08-31.

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