seedgen

seedgen is a skill for Claude Code from katareayush/video-captions. It costs 130 tokens per session (1,009 once invoked), scanned A, original, MIT.

A repository-analysis guide for generating a runnable test-data seed script. It supports common web, Python, and blockchain data models and checks required fields, allowed values, uniqueness, and record links.

In plain words
What is it for?
Use it to inspect schemas and migrations, then create test records for local development or testing.
Why use it?
It reduces failures caused by sample data that does not match the project’s rules or insertion order.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter. Also seen: mentions Claude Code; mentions Gemini CLI.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the seedgen plugin — 1 skill, 1 command shipped together

Good fit Use it to inspect schemas and migrations, then create test records for local development or testing.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add katareayush/video-captions
Claude Code
/plugin install seedgen

Made for: Claude Code.

Or install seedgen, the plugin that ships this one along with the rest of its 1 skill, 1 command.

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 seedgen

README.md
[![agentmods](https://agentmods.dev/badge/skills/katareayush/video-captions/seedgen/github.svg)](https://agentmods.dev/skills/katareayush/video-captions/seedgen)
Your own site
<a href="https://agentmods.dev/skills/katareayush/video-captions/seedgen"><img src="https://agentmods.dev/badge/skills/katareayush/video-captions/seedgen/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 seedgen

Your own site · 80×15
<a href="https://agentmods.dev/skills/katareayush/video-captions/seedgen"><img src="https://agentmods.dev/badge/skills/katareayush/video-captions/seedgen.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 130 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,009 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 $0.00130 $0.01009
Opus 5 $0.00065 $0.00504
Sonnet 5 $0.00026 $0.00202
Haiku 4.5 $0.00013 $0.00101

Measured 9d ago against content hash d232a9bc80a9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

seedgen 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.

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.

plugins/seedgen/skills/seedgen/SKILL.md · 47 lines

How it starts

The opening of the file, as written. The whole thing — 47 lines — stays where its author put it; the contents beside it link to each section on GitHub.

seedgen

You are generating a test-data seed script for the current repository. Be surgical and concise — produce something that runs on the first try.

If the user supplied arguments (a locale, a count, a scope), treat them as the request/filters; otherwise use the defaults noted in step 3.

1. Analyze the repo (read, don't guess)

Detect the stack and locate every place data is defined. Check for, in order of what exists:

  • SQL / migrations: *.sql, migrations/, schema.sql, Flyway/Liquibase.
  • ORM schemas: Prisma (schema.prisma), Django (models.py), SQLAlchemy, TypeORM/Sequelize/Mongoose, Rails (db/schema.rb), Laravel migrations, GORM/Ent structs, Ecto.
  • Python: dataclasses, Pydantic models, models.py.
  • Web3: Solidity (*.sol), Hardhat/Foundry configs, ABI JSON, deploy scripts — data = on-chain seeding (mint, deploy, fund accounts, populate mappings).
  • APIs / types: OpenAPI/GraphQL schemas, TypeScript interfaces, protobuf.
  • Config: .env.example, docker-compose.yml, package manifest (package.json, pyproject.toml, Cargo.toml, go.mod, Gemfile) to learn the runtime, DB, and how existing scripts run.

Extract: entities/tables, field types, enums, NOT NULL / required, unique constraints, foreign keys and insertion order, and default values.

2. Pick the right output

Write the seed script in the project's own language and idiom so it drops in cleanly:

  • Use the project's existing DB client / ORM / connection config (reuse .env, never hardcode secrets).
  • Prefer the project's existing faker/factory lib if present; otherwise use a lightweight, well-known one for that ecosystem (@faker-js/faker, faker/Faker, etc.), and add it to the manifest.
  • Respect FK order, satisfy every constraint, cover enums with a spread of values, and produce referentially consistent data (child rows point at real parents).
  • Make it idempotent (safe to re-run: truncate/upsert or guard) and parameterized by count.
  • Web3: emit a script for the project's toolchain (Hardhat/Foundry/ethers/web3.py) that deploys/uses contracts and seeds on-chain state against a local node.

Read the full file on GitHub · 47 lines

Files

What ships with it

1 file 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 · 47 lines · 0 tokens per session scan A d232a9bc80a9

Subscribe to this mod's changes

seedgen is a skill published in the GitHub repository katareayush/video-captions (8 stars, last pushed 1mo ago), licensed MIT. It adds 130 tokens to every session and 1,009 once invoked, about $0.0006 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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