# Legacy Rules

> Legacy rules

- Skill: `edenfunf/legacy-rules` (Agent Skill)
- Install (CLI): `npx skillmds@latest add edenfunf/legacy-rules`
- Raw SKILL.md: https://api.skillmd.com/api/skills/edenfunf/legacy-rules/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: edenfunf (https://skillmd.com/u/edenfunf)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/edenfunf/legacy-rules

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# Legacy rules

Older guidance the team accumulated before consolidating onto the
current toolchain. Some of these are still in force; some have been
superseded by newer skills but the file was never cleaned up.

## Linting

Run `pylint` before every commit; CI rejects PRs with new pylint
warnings. (This is partly stale — most teams have moved to `ruff`,
but a couple of services still run pylint locally because their
configurations were never migrated.)

## SQL access

Always use parameterized queries for every database access. Never
concatenate user-provided strings into SQL statements directly. This
includes dynamic WHERE clauses, ORDER BY clauses, and table names.

## Type hints

Type hints are now required across the codebase (see `python-style`).
This file predates that decision; treat the older "type hints are
optional" guidance some skills carry as superseded.

## Boundary discipline

Treat any data that crossed a network or process boundary as untrusted
until proven otherwise. Apply the same scrutiny to data from other
internal services as you would to data from the public internet.