performance-optimizer

performance-optimizer is an agent for Claude Code from duc01226/EasyPlatform. It costs 39 tokens per session (13,633 once invoked), scanned B, original, MIT.

A performance analysis agent that measures software before recommending improvements, then investigates slow queries, APIs, bundles, rendering, and memory use.

In plain words
What is it for?
Use it to investigate database and API latency, N+1 query patterns, missing indexes, large frontend bundles, slow rendering, memory leaks, and subscription problems.
Why use it?
It helps teams fix measured bottlenecks instead of making speculative optimizations, and focuses work on improvements users can feel.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter; reads .claude/ paths; mentions subagents.

Good fit Use it to investigate database and API latency, N+1 query patterns, missing indexes, large frontend bundles, slow rendering, memory leaks, and subscription problems.

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Install with agentmods
npx agentmods add agents/duc01226/easyplatform/performance-optimizer
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/duc01226/EasyPlatform

Made for: Claude Code.

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-optimizer

README.md
[![agentmods](https://agentmods.dev/badge/agents/duc01226/easyplatform/performance-optimizer/github.svg)](https://agentmods.dev/agents/duc01226/easyplatform/performance-optimizer)
Your own site
<a href="https://agentmods.dev/agents/duc01226/easyplatform/performance-optimizer"><img src="https://agentmods.dev/badge/agents/duc01226/easyplatform/performance-optimizer/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-optimizer

Your own site · 80×15
<a href="https://agentmods.dev/agents/duc01226/easyplatform/performance-optimizer"><img src="https://agentmods.dev/badge/agents/duc01226/easyplatform/performance-optimizer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 39 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 13,633 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. 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 $0.00039 $0.13633
Opus 5.5 $0.00016 $0.05453
Sonnet 5.5 $0.00008 $0.02727
Haiku 4.5 $0.00004 $0.01363

Measured 3d ago against content hash c0a018d338ec, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

performance-optimizer scanned grade B with 1 finding 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 3d 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

> 3. Optional: when grep and reading alone may not reveal a high-risk blast radius, `python .claude/scripts/code_graph trace <file> --direction both --json` (when `.code-graph/graph.db` exists) can add callers and depend
.claude/agents/performance-optimizer.md · 542 lines

How it starts

The opening of the file, as written. The whole thing — 542 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Connected Skill Contracts

Skill connection: Apply the task-specific procedure from the connected canonical skill contract that matches the assigned brief. The role-specific quality SYNC blocks in this prompt are the static sub-agent quality protocol; do not expand orchestrator-only instructions inside a leaf assignment.

Connected contracts:

  • performance-review

Quick Summary

Goal: Investigate performance bottlenecks and deliver measured, evidence-backed optimization recommendations — ordered by user-visible latency reduction — so the right fix lands at the right layer instead of premature or guessed optimization.

Summary:

  • Measure baseline FIRST — no optimization recommendation ships without before-metrics; premature optimization is forbidden
  • Hunt the high-ROI defects: N+1 loops, missing indexes, and EVERY unbounded full-collection fetch (OOM risk)
  • Read project backend/frontend reference docs before analysis — generic advice without project context is useless
  • Write a Before/After report to tmp/reports/ (an optional graph trace can hint at hot-path fan-out when graph.db exists — it may be stale; verify by reading)

Workflow:

  1. Profile — Identify concern (query, API, bundle, rendering); gather baseline metrics FIRST
  2. Investigate — Trace code paths; detect N+1, missing indexes, large payloads, unbounded fetches
  3. Recommend — Specific fixes, expected impact, ordered by user-visible latency reduction
  4. Report — Write to tmp/reports/ with Before/After comparison

Key Rules:

  • AI surface? Only if the change creates or changes a model call, prompt, agent, tool/MCP, retrieval or eval (see node .claude/scripts/ai-signal-scan.cjs): apply AE-4, AE-5 (context budget, caching layout, timeouts, cost caps) from .claude/skills/shared/protocols/ai-engineering-gate.md and route depth to ai-engineering-review; otherwise skip this line.
  • NEVER optimize without measuring — gather baseline metrics first; premature optimization is forbidden — why: a fix with no baseline cannot be proven to help
  • NEVER guess impact — cite evidence (query counts, timing, bundle size) for every recommendation
  • ALWAYS flag EVERY unbounded list query (full-collection fetch without pagination/limit) — OOM risk
  • ALWAYS check existing indexes / cached results before recommending new ones — why: redundant indexes add write cost
  • Optional: the code graph (when .code-graph/graph.db exists) can hint at hot-path callers; it may be stale, verify by reading

Read the full file on GitHub · 542 lines

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. 3d ago Changed · -9 lines · -36 tokens per session scan A → B c0a018d338ec
  2. 1mo ago First seen · 551 lines · 75 tokens per session scan A 30a52dfbd589

Subscribe to this mod's changes

performance-optimizer is an agent published in the GitHub repository duc01226/EasyPlatform (12 stars, last pushed yesterday), licensed MIT. It adds 39 tokens to every session and 13,633 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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