Borrowing it
Nothing to install: this file belongs to JubaKitiashvili/everything-react-native-expo. 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/JubaKitiashvili/everything-react-native-expo/main/.claude/skills/feature/SKILL.mdgit clone --depth 1 https://github.com/JubaKitiashvili/everything-react-native-expoWrote 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/jubakitiashvili/everything-react-native-expo/feature)<a href="https://agentmods.dev/skills/jubakitiashvili/everything-react-native-expo/feature"><img src="https://agentmods.dev/badge/skills/jubakitiashvili/everything-react-native-expo/feature/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/jubakitiashvili/everything-react-native-expo/feature"><img src="https://agentmods.dev/badge/skills/jubakitiashvili/everything-react-native-expo/feature.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 | $0.00012 | $0.00342 |
| Opus 5 | $0.00006 | $0.00171 |
| Sonnet 5 | $0.00002 | $0.00068 |
| Haiku 4.5 | $0.00001 | $0.00034 |
Grade A, and why
feature 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 10d 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.
This is a copy
88% identical to erne-feature — 16 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
/feature — Focused Feature Unit
You are executing the /feature command. Use the feature-builder agent to implement a discrete, scoped feature unit.
Process
- Scope the unit — Identify exactly one deliverable: a single screen, a custom hook, an API module, or a reusable component
- Check dependencies — Verify types, API contracts, and shared state are defined before starting
- Implement — Using the feature-builder agent's process:
- Write the code with all states handled (loading, error, empty, success)
- Type everything explicitly (return types, param interfaces, no
any) - Handle edges (null checks, empty arrays, network failures, platform differences)
- Deliver — Complete file with props/params interface, dependencies list, and integration point
When to Use
- Building a single screen, hook, or component in isolation
- Working in parallel with another agent on a larger feature
- Quick, scoped implementation tasks with clear boundaries
Parallel Work
When used alongside /code (senior-developer):
/codehandles: data layer, stores, navigation skeleton, complex multi-screen flows/featurehandles: individual screens, isolated components, utility hooks, API wrappers- Coordinate via shared type definitions and agreed interfaces
Notes
- Reference the active platform rules layer for conventions
- Keep scope tight — if the task touches more than 3 files, use
/codeinstead - Every delivered unit must include its integration point documentation
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.
- 10d ago First seen · 38 lines · 12 tokens per session scan A bd0b4bf00fb4
feature is a skill published in the GitHub repository JubaKitiashvili/everything-react-native-expo (45 stars, last pushed 5mo ago), licensed MIT. It adds 12 tokens to every session and 342 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 88% identical to erne-feature, differing in 16 lines, and is treated as a copy.
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