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perf

perf is a command for Claude Code from isaacsight/kernel. It costs 0 tokens per session (447 once invoked), scanned A, original, MIT.

A performance-audit command that measures build time, type-check time, bundle sizes, and API response times against set budgets.

In plain words
What is it for?
Use it to inspect JavaScript and CSS sizes, measure build and type-check duration, check API latency, review dependencies, and save historical results.
Why use it?
It shows whether the project is becoming too slow or too large and helps identify dependency or endpoint problems.

Command for Claude Code

Written for Claude Code: installed under .claude/. Also seen: reads .claude/ paths.

not rated 16repo 1mo ago A scan 0 tokens original MIT

Good fit Use it to inspect JavaScript and CSS sizes, measure build and type-check duration, check API latency, review dependencies, and save historical results.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/isaacsight/kernel/perf
View source ↗ isaacsight/kernel kernel.chat
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/isaacsight/kernel

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 perf

README.md
[![agentmods](https://agentmods.dev/badge/commands/isaacsight/kernel/perf/github.svg)](https://agentmods.dev/commands/isaacsight/kernel/perf)
Your own site
<a href="https://agentmods.dev/commands/isaacsight/kernel/perf"><img src="https://agentmods.dev/badge/commands/isaacsight/kernel/perf/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 perf

Your own site · 80×15
<a href="https://agentmods.dev/commands/isaacsight/kernel/perf"><img src="https://agentmods.dev/badge/commands/isaacsight/kernel/perf.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 447 The whole file, excluding the scripts and references it only reads on demand.
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 $0.00000 $0.00447
Opus 5.5 $0.00000 $0.00179
Sonnet 5.5 $0.00000 $0.00089
Haiku 4.5 $0.00000 $0.00045

Measured 2mo ago against content hash 1d059d21bb58, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

perf 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 2mo 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.

.claude/commands/perf.md · 45 lines

What it actually says

Run a performance audit on the Kernel platform.

You are the Performance Agent. Read .claude/agents/performance.md for your full protocol and budgets.

Steps:

  1. Load memory — Call agent_memory_read for performance agent
  2. Build with timing — Run time npm run build and capture build duration
  3. Bundle sizes — After build, check dist/assets/ for JS and CSS sizes:
    • ls -lh dist/assets/*.js dist/assets/*.css
    • gzip -c dist/assets/index-*.js | wc -c (gzipped JS size)
    • gzip -c dist/assets/index-*.css | wc -c (gzipped CSS size)
  4. Type check timing — Run time npx tsc --noEmit
  5. Dependency check — Run kernel_deps to identify outdated or bloated packages
  6. Endpoint latency — Run kernel_uptime to measure API response times
  7. Budget comparison — Compare all metrics against budgets:
    • JS < 200KB gzip (critical > 300KB)
    • CSS < 100KB gzip (critical > 150KB)
    • Build < 30s (critical > 60s)
    • Type check < 15s (critical > 30s)
    • API p95 < 2s (critical > 5s)
  8. Save findings — Call agent_memory_write for performance in "Bundle Size History" with current sizes
  9. Handoff — If bundle bloat traces to specific deps, call team_handoff to devops

Report format:

# Performance Report — [date]

## Bundle
- JS: XXkb gzip — PASS/FAIL
- CSS: XXkb gzip — PASS/FAIL

## Build
- Build time: XXs — PASS/FAIL
- Type check: XXs — PASS/FAIL

## API Latency
[endpoint results]

## Dependencies
[outdated/vulnerable packages]

## Verdict: PASS / FAIL
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. 2mo ago First seen · 45 lines · 0 tokens per session scan A 1d059d21bb58

Subscribe to this mod's changes

perf is a command published in the GitHub repository isaacsight/kernel (16 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 447 tokens. 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 2026-09-03.

Analytics and metricsCloudDevOps and cloudagent-infrastructureai-agentcompliance-as-codeeu-ai-actkbotmcp
Related

perf compared with commands from other repositories

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