What is do-write-concise-methods?

A rule for keeping a public method short and easy to read, with detailed work moved into small helper methods. A public method is the entry point other code calls; helper methods handle individual parts of the job.

Use it when designing new methods or breaking up complex logic into clearly named, focused helpers.

It prevents one method from becoming a difficult-to-follow block of mixed responsibilities. The main workflow stays visible while supporting details remain separated.

do-write-concise-methods — Cursor rule by FeatureFactory-io/mimir

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.

Clone the repo

git clone --depth 1 https://github.com/FeatureFactory-io/mimir

Made for: Windsurf.

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/rules/featurefactory-io/mimir/do-write-concise-methods/github.svg)](https://agentmods.dev/rules/featurefactory-io/mimir/do-write-concise-methods)

Your own site

<a href="https://agentmods.dev/rules/featurefactory-io/mimir/do-write-concise-methods"><img src="https://agentmods.dev/badge/rules/featurefactory-io/mimir/do-write-concise-methods/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/rules/featurefactory-io/mimir/do-write-concise-methods"><img src="https://agentmods.dev/badge/rules/featurefactory-io/mimir/do-write-concise-methods.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 240 This file is loaded in full into every session.

When invoked 240 The same file — it is already loaded in full.

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	$0.00240	$0.00240
Opus 5.5	$0.00096	$0.00096
Sonnet 5.5	$0.00048	$0.00048
Haiku 4.5	$0.00024	$0.00024

Measured 1mo ago against content hash 096c36a742c3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

do-write-concise-methods 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.

.windsurf/rules/do-write-concise-methods.md · 33 lines

What it actually says

Rule: Write Concise Methods

When designing new methods:

Ensure the top-level (public) method is concise—ideally 20–30 lines maximum.
Move all supporting logic and details into well-named private (or inner/helper) methods.
The top-level method should clearly express the main workflow, delegating specifics to lower-level helpers.

Example:

class SomeObject:
    def main_method(self, id):
        # Inner/helper method for a single, focused operation
        def _short_method(arg): 
            return op(arg)

        target = self._get_target(_short_method(id))
        result = self._do_magic_on(target)
        return result

    def _get_target(self, id):
        # Implementation here
        pass

    def _do_magic_on(self, target):
        # Implementation here
        pass

Guidelines:

Keep the top-level method readable and high-level—think of it as a summary of the operation.
Each helper/private method should do one thing and have a clear, descriptive name.
Avoid cramming complex logic into the top-level method; instead, encapsulate details in private helpers.

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 Changed · -4 lines · -7 tokens per session 096c36a742c3
1mo ago First seen · 37 lines · 247 tokens per session scan A ba7198539fc2

Subscribe to this mod's changes

do-write-concise-methods is a cursor rule published in the GitHub repository FeatureFactory-io/mimir (16 stars, last pushed 17d ago), licensed Apache-2.0. It adds 240 tokens to every session, about $0.0010 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.

Code review

do-write-concise-methods

Getting it into your agent

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Nothing flagged

What it actually says

Rule: Write Concise Methods

What this file has done since we first saw it

Other cursor rules, from other repositories

clean-code-reviewer

sweep-benchmarks

code-review

ponytail

angular-20

dev-standard