best-practices

A rule for loading a reference document about good practices for a chosen AI-agent topic. Topics include coordination between agents, prompts, memory, tools, testing, security, and performance.

In plain words
What is it for?
Use it when asking how to improve an agent or learn about one of those topics. It presents benchmarks, key principles, the full reference, and questions for applying the guidance.
Why use it?
It helps answer design questions with the relevant guidance instead of searching through every document. It also maps broad terms such as “RAG” or “multi-agent” to the appropriate reference files.

Cursor rule for Cursor

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.

agentmods
npx agentmods add rules/sarkarsaurabh27/agent-loop-learning/best-practices
Clone the repo
git clone --depth 1 https://github.com/sarkarsaurabh27/agent-loop-learning

Made for: Cursor.

Per session 43 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 373 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00043 $0.00373
Opus 5 $0.00022 $0.00187
Sonnet 5 $0.00009 $0.00075
Haiku 4.5 $0.00004 $0.00037

Measured 2d ago against content hash e23076c21de1, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

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 2d 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.

.cursor/rules/best-practices.mdc · 35 lines

What it actually says

Load Best Practice Reference

When the user asks for best practices on a topic:

  1. Match the topic keyword:
Keyword File
orchestration / multi-agent best-practices/01-multi-agent-orchestration.md
worker best-practices/02-worker-prompting.md
prompting best-practices/02-worker-prompting.md + 07-prompt-engineering.md
memory / context / rag best-practices/03-context-and-memory.md
tools best-practices/04-tool-design.md
verification / testing best-practices/05-verification-and-testing.md
security / permissions best-practices/06-security-and-permissions.md
performance / startup best-practices/08-performance-and-startup.md
benchmarks best-practices/09-benchmarks-reference.md
all all docs
  1. Read the matched file(s).

  2. Present with this structure:

    • Key benchmarks — the "Benchmarks at a Glance" table from the doc
    • Core principles — 3–5 bullet summary
    • Full document — complete content
    • How to apply — 2–3 self-check questions for the user's own agent
  3. If no keyword, show best-practices/README.md index and ask which topic.

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.

  1. 2d ago First seen · 35 lines · 43 tokens per session scan A e23076c21de1

Subscribe to this mod's changes

best-practices is a cursor rule published in the GitHub repository sarkarsaurabh27/agent-loop-learning (3 stars, last pushed 3mo ago), licensed MIT. It adds 43 tokens to every session and 373 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 2026-08-31.