Borrowing it
Nothing to install: this file belongs to GetStream/stream-chat-react-native. 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/GetStream/stream-chat-react-native/develop/.claude/skills/perf-benchmarking/SKILL.mdgit clone --depth 1 https://github.com/GetStream/stream-chat-react-nativeWrote 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/getstream/stream-chat-react-native/perf-benchmarking)<a href="https://agentmods.dev/skills/getstream/stream-chat-react-native/perf-benchmarking"><img src="https://agentmods.dev/badge/skills/getstream/stream-chat-react-native/perf-benchmarking/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/getstream/stream-chat-react-native/perf-benchmarking"><img src="https://agentmods.dev/badge/skills/getstream/stream-chat-react-native/perf-benchmarking.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Agent Snooping · line 197 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Excessive Agency · line 147 Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
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 | $0.00113 | $0.05711 |
| Opus 5.5 | $0.00045 | $0.02284 |
| Sonnet 5.5 | $0.00023 | $0.01142 |
| Haiku 4.5 | $0.00011 | $0.00571 |
Grade A, and why
perf-benchmarking scanned grade A 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 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -s 'http://localhost:8081/index.map?platform=android&dev=true&minify=false' -o /tmp/dev.map.json The source is not reproduced here
A licence we could not identify
The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.
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.
- 2mo ago First seen · 202 lines · 113 tokens per session scan A 72001b9b6bf7
perf-benchmarking is a skill published in the GitHub repository GetStream/stream-chat-react-native (1,183 stars, last pushed yesterday), with no licence file. It adds 113 tokens to every session and 5,711 once invoked, about $0.0005 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
perf-benchmarking compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| perf-benchmarkingGetStream/stream-chat-react-native | Skill | 1.2k | yesterday | none | A | 113 | Claude Code |
| argent-device-interactsoftware-mansion/argent | Skill | 3.2k | yesterday | Apache-2.0 | A | 78 | Claude Code, Codex |
| argent-metro-debuggersoftware-mansion/argent | Skill | 3.2k | yesterday | Apache-2.0 | A | 104 | Claude Code, Codex |
| argent-settings-permissionssoftware-mansion/argent | Skill | 3.2k | yesterday | Apache-2.0 | A | 140 | Claude Code, Codex |
| react-native-testingcallstack/react-native-testing-library | Skill | 3.4k | yesterday | MIT | A | 134 | Claude Code, Codex |
| argent-react-native-optimizationsoftware-mansion/argent | Skill | 3.2k | yesterday | Apache-2.0 | A | 71 | Claude Code, Codex |
| truesheet-usagelodev09/react-native-true-sheet | Skill | 2.1k | yesterday | MIT | A | 171 | Claude Code, Codex |