Borrowing it
Nothing to install: this file belongs to alleneubank/claude-code. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/alleneubank/claude-code/main/.claude/skills/atlas-best-practices/SKILL.mdgit clone --depth 1 https://github.com/alleneubank/claude-codeWrote 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.
[](https://agentmods.dev/skills/alleneubank/claude-code/atlas-best-practices)<a href="https://agentmods.dev/skills/alleneubank/claude-code/atlas-best-practices"><img src="https://agentmods.dev/badge/skills/alleneubank/claude-code/atlas-best-practices.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00045 | $0.00501 |
| Opus 5 | $0.00023 | $0.00251 |
| Sonnet 5 | $0.00009 | $0.00100 |
| Haiku 4.5 | $0.00005 | $0.00050 |
Grade A, and why
atlas-best-practices 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 8d 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.
How it starts
The opening of the file, as written. The whole thing — 55 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Atlas Best Practices
Atlas supports declarative and versioned schema workflows. Keep this file minimal and load only the reference file needed for the current task.
Workflow Selection
- Use declarative workflow when desired schema state is the source of truth.
- Use versioned workflow when migration files are required for auditing and staged deployments.
- Use baseline workflow when onboarding an existing database.
Default Execution Flow
- Confirm the target
envinatlas.hcl. - Confirm
devis configured and isolated from production. - Plan first, then lint/test/validate, then apply.
- Run production changes through CI/CD or approved deployment workflow.
Quick Commands
# Declarative
atlas schema apply --env local
# Versioned
atlas migrate diff add_change --env local
atlas migrate lint --env local --latest 1
atlas migrate apply --env local
# Integrity
atlas migrate validate --env local
atlas migrate status --env local
Reference Map
- core-workflows.md Use for environment config, schema-as-code patterns, declarative vs versioned workflows, baselining, and ORM provider loading.
- safety-and-quality.md Use for lint analyzers, transaction modes, schema tests, pre-execution checks, and CI patterns.
- atlas-v1-1-features.md Use for Atlas v1.1 coverage (released on 2026-02-03), including security as code, declarative data, new drivers/platform support, Slack integration, schema exporters, and MySQL TLS.
- cli-agent-gaps.md Use for Atlas CLI capabilities and edge cases agents often miss: planning workflows, migration directory maintenance commands, URL/TLS pitfalls, feature availability, and version policy constraints.
Guardrails
- Keep credentials out of source files; prefer Atlas data sources and input variables.
- Require explicit review for destructive or data-dependent migrations.
- Fail loudly on unsupported drivers, missing
devURLs, or unknown environment names.
What ships with it
4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 8d ago First seen · 55 lines · 45 tokens per session scan A 6889ae660dbb
atlas-best-practices is a skill published in the GitHub repository alleneubank/claude-code (52 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 45 tokens to every session and 501 once invoked, about $0.0002 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.
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