What is create-migration?

A project-specific way to change the database structure, such as adding a table or column. It uses standalone Python scripts instead of Alembic, a commonly used database-migration tool.

Use it to update the ORM models, write and apply an idempotent migration, and verify a schema change against the development database.

It keeps the live database, application models, and test database aligned. The scripts are safe to run again without repeating an already-applied change.

How dfirtnt/Huntable-CTI-Studio configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to dfirtnt/Huntable-CTI-Studio. 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/dfirtnt/Huntable-CTI-Studio/main/.claude/skills/create-migration/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/dfirtnt/Huntable-CTI-Studio

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/dfirtnt/huntable-cti-studio/create-migration/github.svg)](https://agentmods.dev/skills/dfirtnt/huntable-cti-studio/create-migration)

Your own site

<a href="https://agentmods.dev/skills/dfirtnt/huntable-cti-studio/create-migration"><img src="https://agentmods.dev/badge/skills/dfirtnt/huntable-cti-studio/create-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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/dfirtnt/huntable-cti-studio/create-migration"><img src="https://agentmods.dev/badge/skills/dfirtnt/huntable-cti-studio/create-migration.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 109 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 809 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.

Model	Per session	Once invoked
Fable 5.1	$0.00109	$0.00809
Opus 5.5	$0.00044	$0.00324
Sonnet 5.5	$0.00022	$0.00162
Haiku 4.5	$0.00011	$0.00081

Measured 1mo ago against content hash 9fc6c4b452e4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

create-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 1mo 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.

.claude/skills/create-migration/SKILL.md · 60 lines

How it starts

The opening of the file, as written. The whole thing — 60 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Create Migration

This repo does not use Alembic for migrations, even though alembic appears in pyproject.toml. The house pattern is a standalone, idempotent Python script in scripts/migrate_add_<name>.py, applied by hand against the live dev database. The test database schema is generated directly from the ORM models, not from migration scripts — which is why step 1 below matters most.

Canonical example

Read scripts/migrate_add_osdetection_fallback_enabled.py before writing anything. It is the reference implementation: docstring with Why / Adds / Idempotent / Usage sections, DATABASE_URL from the environment, postgresql+asyncpg:// → postgresql:// swap, an information_schema existence check so re-runs are harmless, logging, and a proper exit code.

Workflow

Update the ORM model first. src/database/models.py is a contract source of truth (see AGENTS.md). The test DB is built from these models by scripts/init_test_schema.py (async_db_manager.create_tables()), so a schema change that only exists in a migration script will silently diverge from every test run. If the change touches workflow configuration, also update src/config/workflow_config_schema.py and check whether the 9 quickstart presets in config/presets/AgentConfigs/quickstart/ need the new field.
Write scripts/migrate_add_<name>.py following the canonical example. Non-negotiables, because operators re-run these scripts freely:
- Idempotent: check information_schema.columns (or to_regclass for tables) and skip silently if already applied.
- DATABASE_URL from env — never hardcode credentials.
- Docstring explains why the change exists, not just what it adds.
- Sensible column default so existing rows/installs keep prior behavior.
Apply to the dev database. The live DB runs in the cti_postgres container: DATABASE_URL=... python scripts/migrate_add_<name>.py Verify directly afterward: docker exec cti_postgres psql -U cti_user -d cti_scraper -c "\d <table>"

Read the full file on GitHub · 60 lines

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.

1mo ago First seen · 60 lines · 109 tokens per session scan A 9fc6c4b452e4

Subscribe to this mod's changes

create-migration is a skill published in the GitHub repository dfirtnt/Huntable-CTI-Studio (11 stars, last pushed 7d ago), licensed MIT. It adds 109 tokens to every session and 809 once invoked, about $0.0004 per session on Opus 5.5. 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.

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