performance-reliability

performance-reliability is a cursor rule for Cursor from jterratsdev/ableton-live-mcp. It costs 371 tokens per session, scanned A, original, MIT.

A set of rules for making software respond quickly, use resources predictably, and continue working when load or failures increase.

In plain words
What is it for?
Use it when designing APIs, database queries, background jobs, caching, pagination, streaming, or other high-traffic code. It guides performance budgets, failure handling, and before-and-after measurement.
Why use it?
It helps avoid slow request paths, excessive database queries, unbounded memory use, unclear caching, and performance changes made without measurements.

Cursor rule for Cursor

Written for Cursor: a Cursor rule (.mdc).

Good fit Use it when designing APIs, database queries, background jobs, caching, pagination, streaming, or other high-traffic code. It guides performance budgets, failure handling, and before-and-after measurement.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/jterratsdev/ableton-live-mcp/performance-reliability
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/jterratsdev/ableton-live-mcp

Made for: Cursor.

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.

agentmods badge for performance-reliability

README.md
[![agentmods](https://agentmods.dev/badge/rules/jterratsdev/ableton-live-mcp/performance-reliability/github.svg)](https://agentmods.dev/rules/jterratsdev/ableton-live-mcp/performance-reliability)
Your own site
<a href="https://agentmods.dev/rules/jterratsdev/ableton-live-mcp/performance-reliability"><img src="https://agentmods.dev/badge/rules/jterratsdev/ableton-live-mcp/performance-reliability/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.

agentmods 80×15 button for performance-reliability

Your own site · 80×15
<a href="https://agentmods.dev/rules/jterratsdev/ableton-live-mcp/performance-reliability"><img src="https://agentmods.dev/badge/rules/jterratsdev/ableton-live-mcp/performance-reliability.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 371 This file is loaded in full into every session.
When invoked 371 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00371 $0.00371
Opus 5.5 $0.00148 $0.00148
Sonnet 5.5 $0.00074 $0.00074
Haiku 4.5 $0.00037 $0.00037

Measured 1mo ago against content hash 3d54c6efa757, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

performance-reliability 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.

rules/performance-reliability.mdc · 34 lines

What it actually says

Performance & Reliability

Performance and reliability must be designed, measured, and protected. Do not optimize blindly or defer obvious scalability risks.

Budgets

  • Define expected latency, throughput, payload size, memory, storage, and concurrency for high-impact flows.
  • User-facing flows should consider p95 and p99 latency, not only averages.
  • Establish performance budgets for page weight, render time, API latency, and query count when applicable.
  • If no budget exists, propose one before making risky design choices.

Hot Paths

  • Avoid N+1 queries, unbounded loops with I/O, repeated serialization, and large synchronous work on request paths.
  • Paginate or stream large datasets. Do not load unbounded result sets into memory.
  • Load the collection-standards skill when implementation, QA automation, or DevOps scripting processes repeated collections, joins lists, scans logs, builds command matrices, or must prove O(n) or bounded complexity.
  • Keep expensive work outside user-facing request paths through queues, jobs, or precomputation.
  • Measure before and after performance changes and report the evidence.

Caching

  • Cache only with clear ownership, TTL, invalidation strategy, and stale-data behavior.
  • Do not cache sensitive data unless storage, access, and expiration controls are explicit.
  • Prefer simple, observable cache strategies before multi-layer cache complexity.
  • Document cache keys and invalidation triggers for shared caches.

Reliability

  • Design for graceful degradation when dependencies fail.
  • Add timeouts, retries, backoff, and circuit breakers for networked dependencies.
  • Use bulkheads or queues to protect critical paths from non-critical workload spikes.
  • Reliability-sensitive changes need load, stress, or synthetic tests when practical.
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. 1mo ago First seen · 34 lines · 371 tokens per session scan A 3d54c6efa757

Subscribe to this mod's changes

performance-reliability is a cursor rule published in the GitHub repository jterratsdev/ableton-live-mcp (0 stars, last pushed 1mo ago), licensed MIT. It adds 371 tokens to every session, about $0.0015 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 2026-08-31.