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.
git clone --depth 1 https://github.com/pedrol-cmd/brain-drinWrote 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.
[](https://agentmods.dev/commands/pedrol-cmd/brain-drin/perf-check)<a href="https://agentmods.dev/commands/pedrol-cmd/brain-drin/perf-check"><img src="https://agentmods.dev/badge/commands/pedrol-cmd/brain-drin/perf-check/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.
<a href="https://agentmods.dev/commands/pedrol-cmd/brain-drin/perf-check"><img src="https://agentmods.dev/badge/commands/pedrol-cmd/brain-drin/perf-check.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00018 | $0.00261 |
| Opus 5.5 | $0.00007 | $0.00104 |
| Sonnet 5.5 | $0.00004 | $0.00052 |
| Haiku 4.5 | $0.00002 | $0.00026 |
Grade A, and why
perf-check 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.
What it actually says
Performance Check
Context
- Target: $ARGUMENTS
Your Task
Analyze for:
Database
- N+1 query patterns
- Missing indexes on WHERE/ORDER BY columns
- SELECT * on large tables
- Missing pagination on list endpoints
- Unbounded queries
Memory & Resources
- Event listeners not cleaned up
- Streams not closed
- Large datasets loaded entirely into memory
- Connection pool exhaustion
Computation
- Redundant computation in loops
- Missing memoization for expensive operations
- Blocking operations on main thread
- Unnecessary re-renders (React) or recomputations
Network
- Missing caching headers
- Overfetching (loading more data than needed)
- Missing compression
- Sequential requests that could be parallel
Output
For each finding:
**[Impact: HIGH|MEDIUM|LOW]** file:line — Title
What: the problem
Impact: estimated effect (latency, memory, cost)
Fix: specific optimization
End with prioritized optimization plan. Biggest impact first.
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 First seen · 52 lines · 18 tokens per session scan A b182dc040a91
perf-check is a command published in the GitHub repository pedrol-cmd/brain-drin (12 stars, last pushed 6mo ago), licensed MIT. It adds 18 tokens to every session and 261 once invoked, about $0.0001 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 2026-09-03.
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