agentic-coding-data-migration-expert

A code-review agent for checking database migrations, data backfills, and changes made to live data against the actual data.

In plain words
What is it for?
Use it when a pull request changes a database schema or transforms existing records. It checks ID mappings, column renames, enum conversions, and related data changes.
Why use it?
It helps catch problems where real records do not match the assumptions in a migration, such as renamed columns, changed IDs, or converted enum values.

Agent

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/dolphinai2026/dolphin-code/agentic-coding-data-migration-expert
Clone the repo
git clone --depth 1 https://github.com/DolphinAI2026/dolphin-code
Per session 44 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 949 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 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 $0.00044 $0.00949
Opus 5 $0.00022 $0.00475
Sonnet 5 $0.00009 $0.00190
Haiku 4.5 $0.00004 $0.00095

Measured 3d ago against content hash 005f3c9560a6, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

agentic-coding-data-migration-expert scanned grade A 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

2. **Missing error handling** - `.fetch(id)` crashes on unexpected values instead of fallback
agentic-coding/agents/agentic-coding-data-migration-expert.agent.md · 99 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-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. 3d ago First seen · 99 lines · 44 tokens per session scan A 005f3c9560a6

Subscribe to this mod's changes

agentic-coding-data-migration-expert is an agent published in the GitHub repository DolphinAI2026/dolphin-code (977 stars, last pushed 1mo ago), licensed GPL-3.0. It adds 44 tokens to every session and 949 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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