Borrowing it
Nothing to install: this file belongs to Undertone0809/rudder. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/Undertone0809/rudder/main/.agents/skills/maintainer/rudder-performance-maintainer/SKILL.mdgit clone --depth 1 https://github.com/Undertone0809/rudderWrote 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/skills/undertone0809/rudder/rudder-performance-maintainer)<a href="https://agentmods.dev/skills/undertone0809/rudder/rudder-performance-maintainer"><img src="https://agentmods.dev/badge/skills/undertone0809/rudder/rudder-performance-maintainer/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/skills/undertone0809/rudder/rudder-performance-maintainer"><img src="https://agentmods.dev/badge/skills/undertone0809/rudder/rudder-performance-maintainer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00118 | $0.01303 |
| Opus 5 | $0.00059 | $0.00651 |
| Sonnet 5 | $0.00024 | $0.00261 |
| Haiku 4.5 | $0.00012 | $0.00130 |
Grade A, and why
rudder-performance-maintainer 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 9d 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.
How it starts
The opening of the file, as written. The whole thing — 137 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Rudder Performance Maintainer
Measure the real bottleneck under a controlled workload, preserve correctness, and separate evidence from intuition.
Decide The Mode
Classify the request before running expensive work:
AUDIT: measure current health, identify the highest-leverage risk, and propose the smallest safe next step. This is the default for daily checks.DIAGNOSE: reproduce a named slowdown and isolate client, server, database, payload, runtime, or environment cost.IMPLEMENT: change code only when the user asked to optimize/fix/implement.VERIFY: run comparable before/after evidence for an existing change.
Do not let a scheduled audit silently turn into a multi-hour implementation. When the user continues the same task with an implementation request, preserve the audit evidence and switch modes explicitly.
Route environment startup/hang recovery to
rudder-desktop-dev-recovery-maintainer, a single failed run or missing
transcript to debug-run-transcript-maintainer, and release workflow delay to
release-maintainer. Return here only when bounded measurement identifies a
product latency, throughput, rendering, payload, or memory scaling problem.
Read The Relevant References
- Always read
references/evidence-model.md. - Read
references/workflow-benchmark.mdfor API/database/high-volume workflow baselines andscripts/perf/run-isolated-workflow.ts. - Read
references/ui-scroll-benchmark.mdfor Chat/Messenger/Issue/Run rendering, virtualization, streaming, andscripts/perf/compare-scroll-evals.mjs. - Read
references/environment-and-safety.mdbefore using installed Desktop, prod-local data, large logs, or cleanup/recovery actions.
Do not load UI guidance for a database-only regression or release guidance for a local benchmark.
First-Principles Performance Model
Performance is the work performed per user-visible outcome:
user action
-> requests and payloads
-> server/query/runtime work
-> client state propagation
-> render/layout/paint
-> observable latency, responsiveness, memory, and correctness
What ships with it
5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 9d ago First seen · 137 lines · 118 tokens per session scan A f9b6bdf655a0
rudder-performance-maintainer is a skill published in the GitHub repository Undertone0809/rudder (288 stars, last pushed today), licensed Apache-2.0. It adds 118 tokens to every session and 1,303 once invoked, about $0.0006 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 2026-08-30.
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