lightfriend: Skill for Claude Code

.agents/skills/lightfriend-db-migration/SKILL.md

lightfriend-db-migration is a skill for Claude Code, Codex from ahtavarasmus/lightfriend. It costs 17 tokens per session (1,124 once invoked), scanned A, original, AGPL-3.0.

A step-by-step guide for changing a database structure with Diesel migration files. Diesel is a Rust library for working with databases.

In plain words
What is it for?
Use it when adding, changing, or removing database tables and fields in a project that uses Diesel.
Why use it?
It provides an ordered way to update the database structure while keeping those changes recorded in the project.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing. Also seen: installed under .agents/ (shared by several agents).

This is ahtavarasmus/lightfriend's own configuration. It tells Claude Code and Codex how to work on lightfriend itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything lightfriend configures →

Reuse

Borrowing it

Nothing to install: this file belongs to ahtavarasmus/lightfriend. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/ahtavarasmus/lightfriend/master/.agents/skills/lightfriend-db-migration/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/ahtavarasmus/lightfriend

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 lightfriend-db-migration

README.md
[![agentmods](https://agentmods.dev/badge/skills/ahtavarasmus/lightfriend/lightfriend-db-migration/github.svg)](https://agentmods.dev/skills/ahtavarasmus/lightfriend/lightfriend-db-migration)
Your own site
<a href="https://agentmods.dev/skills/ahtavarasmus/lightfriend/lightfriend-db-migration"><img src="https://agentmods.dev/badge/skills/ahtavarasmus/lightfriend/lightfriend-db-migration/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 lightfriend-db-migration

Your own site · 80×15
<a href="https://agentmods.dev/skills/ahtavarasmus/lightfriend/lightfriend-db-migration"><img src="https://agentmods.dev/badge/skills/ahtavarasmus/lightfriend/lightfriend-db-migration.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 17 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,124 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 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 5.1 $0.00017 $0.01124
Opus 5 $0.00009 $0.00562
Sonnet 5 $0.00003 $0.00225
Haiku 4.5 $0.00002 $0.00112

Measured 12d ago against content hash 222609d6d542, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

lightfriend-db-migration 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 12d 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.

.agents/skills/lightfriend-db-migration/SKILL.md · 196 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

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. 12d ago First seen · 196 lines · 17 tokens per session scan A 222609d6d542

Subscribe to this mod's changes

lightfriend-db-migration is a skill published in the GitHub repository ahtavarasmus/lightfriend (78 stars, last pushed 4d ago), licensed AGPL-3.0. It adds 17 tokens to every session and 1,124 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 2026-08-30.

Related

Other skills, from other repositories

ha-data-stores

Map of Hope Agent's local data stores and safe read-only query workflow. Use when the user asks where Hope Agent stores data, wants to inspect sessions/messages/memory/logs/background jobs/knowledge indexes/settings, asks the model to query local app data, or debugging requires checking persisted state. Trigger…

shiwenwen/hope-agent · 115 tokens

optimize

Analyze and suggest performance improvements for code, queries, or systems.

FlorianBruniaux/claude-code-ultimate-guide · 15 tokens

database-schema-changes

Guide for making database schema changes in Platypus using Drizzle ORM — editing the schema, pushing to a dev database, and generating the migration that ships.

willdady/platypus · 37 tokens

mongo-migration

MongoDB schema migration safety reviewer and migration script generator. ALWAYS use when writing, reviewing, or planning MongoDB schema changes — field additions/removals, index builds, schema validator changes, document type migrations, shard key modifications, or any bulk update touching production collections.…

johnqtcg/awesome-skills · 140 tokens

mysql-migration

MySQL schema migration safety reviewer and DDL generator. ALWAYS use when writing, reviewing, or planning MySQL schema changes — ALTER TABLE, CREATE/DROP INDEX, column type changes, charset conversions, data backfills, or any DDL touching production tables. Covers online DDL algorithm selection (INSTANT/INPLACE/COPY)…

johnqtcg/awesome-skills · 132 tokens

oracle-migration

Oracle Database schema migration safety reviewer and DDL generator. ALWAYS use when writing, reviewing, or planning Oracle schema changes — ALTER TABLE, CREATE/DROP INDEX, column type changes, constraint additions, partition DDL, or any DDL touching production tables. Covers DDL auto-commit implications…

johnqtcg/awesome-skills · 141 tokens