Better Agents is a command-line tool and set of standards for structuring, testing, evaluating, versioning, and observing AI-agent projects. It helps developers build agents with organized prompts, scenario tests, evaluation notebooks, and framework-specific guidance. Its catalogue rules guide coding assistants in applying this structure and these practices.
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.
git clone --depth 1 https://github.com/langwatch/better-agentsWrote 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/rules/langwatch/better-agents/coding-guidelines)<a href="https://agentmods.dev/rules/langwatch/better-agents/coding-guidelines"><img src="https://agentmods.dev/badge/rules/langwatch/better-agents/coding-guidelines/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.
<a href="https://agentmods.dev/rules/langwatch/better-agents/coding-guidelines"><img src="https://agentmods.dev/badge/rules/langwatch/better-agents/coding-guidelines.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00173 | $0.00173 |
| Opus 5.5 | $0.00069 | $0.00069 |
| Sonnet 5.5 | $0.00035 | $0.00035 |
| Haiku 4.5 | $0.00017 | $0.00017 |
Grade A, and why
coding-guidelines 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.
What it actually says
Guiding principles:
- Clean Code
- SRP
- YAGNI
- KISS
DIRECTIVES:
- We want thin files that aim to have a single responsibility and a single export.
- We should have a single export per file.
- Files should be organized/grouped by feature
- Code should be modular
- Functions should be small
- Classes should be small
- functions, classes, methods should have TSDoc with example usage
- top-level directories represent core features, and should each have a README.md that describes the feature and its purpose.
- Never use .js extensions in import statements
- Always use package init commands rather than writing configs manually (e.g., use
npx eslint --initorpnpm exec husky initinstead of creating config files directly)
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 · 22 lines · 173 tokens per session scan A 019f63618a2e
coding-guidelines is a cursor rule published in the GitHub repository langwatch/better-agents (1,562 stars, last pushed 4mo ago), licensed MIT. It adds 173 tokens to every session, about $0.0007 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.
Other cursor rules, from other repositories
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ponytail
Ponytail, lazy senior dev mode. Always pick the simplest solution that works.
angular-20
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dev-standard
Apache Superset development standards and guidelines for Cursor IDE.
prefer-direct-imports-over-module-mocks
Prefer extracting a testable core over vi.mock / vi.resetModules when unit tests need to reach production logic entangled with config, env, or singletons.
config-validation-and-normalization
Config validation and normalization responsibilities (defineConfig normalizes, the orm section schema validates and resolves paths, the loader reports per-section diagnostics).