migration-author

migration-author is an agent for Claude Code from gluk-w/claworc. It costs 100 tokens per session (2,117 once invoked), scanned C, original, no licence file.

A coding agent that creates Go database migration files for schema changes that cannot be handled by automatic updates, or for filling existing data.

In plain words
What is it for?
Use it for data backfills or seeds, column type changes, dropped or renamed columns, and database constraints that automatic migration cannot express.
Why use it?
It helps avoid changing a database structure manually when a change could remove, rename, or alter data and needs a recorded migration.

Agent for Claude Code

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.

agentmods
npx agentmods add agents/gluk-w/claworc/migration-author
Clone the repo
git clone --depth 1 https://github.com/gluk-w/claworc

Made for: Claude Code.

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 migration-author

README.md
[![agentmods](https://agentmods.dev/badge/agents/gluk-w/claworc/migration-author.svg)](https://agentmods.dev/agents/gluk-w/claworc/migration-author)
Your own site
<a href="https://agentmods.dev/agents/gluk-w/claworc/migration-author"><img src="https://agentmods.dev/badge/agents/gluk-w/claworc/migration-author.svg" alt="Measured on agentmods" height="20"></a>
Per session 100 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,117 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 1 finding. Scan, not verified.
Origin unknown 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 $0.00100 $0.02117
Opus 5 $0.00050 $0.01059
Sonnet 5 $0.00020 $0.00423
Haiku 4.5 $0.00010 $0.00212

Measured 3d ago against content hash e4867ca04d7c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade C, and why

migration-author scanned grade C with 1 finding 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 3d 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.

Tells the agent never to refusehighAnti-refusal

Suppressing the ability to decline removes a core safety control; a later harmful request then succeeds.

- **Destructive change (drop a column with data, narrow a type).** Author the migration, but add a one-line comment above the body noting the data loss. Don't refuse.
.claude/agents/migration-author.md · 144 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 3d ago First seen · 144 lines · 100 tokens per session scan C e4867ca04d7c

Subscribe to this mod's changes

migration-author is an agent published in the GitHub repository gluk-w/claworc (242 stars, last pushed 5d ago), with no licence file. It adds 100 tokens to every session and 2,117 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it C with 1 finding (tells the agent never to refuse). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.