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/learn/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/learn)<a href="https://agentmods.dev/skills/jubakitiashvili/everything-react-native-expo/learn"><img src="https://agentmods.dev/badge/skills/jubakitiashvili/everything-react-native-expo/learn/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/learn"><img src="https://agentmods.dev/badge/skills/jubakitiashvili/everything-react-native-expo/learn.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 | $0.00017 | $0.00449 |
| Opus 5 | $0.00009 | $0.00225 |
| Sonnet 5 | $0.00003 | $0.00090 |
| Haiku 4.5 | $0.00002 | $0.00045 |
Grade A, and why
learn 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.
This is a copy
94% identical to erne-learn — 10 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
/learn — Generate Skills from Session
You are executing the /learn command. This is script-driven — it runs the continuous-learning-v2 pipeline directly.
What This Does
Analyzes the current coding session to extract reusable patterns and save them as skills or rule amendments for future sessions. This is the manual trigger for what PostToolUse hooks do automatically.
Process
- Run the extraction script:
node .claude/hooks/scripts/extract-session-patterns.js
This script:
- Scans recent tool calls and file changes
- Identifies patterns (repeated fixes, style corrections, common architectures)
- Compares against existing rules and skills
- Generates candidates for new content
- Review candidates: The script outputs a list of potential learnings:
[PATTERN] Zustand store always uses immer middleware → Suggest rule amendment
[PATTERN] All screens use SafeAreaView wrapper → Suggest coding-style rule
[PATTERN] API calls always retry 3 times → Suggest pattern rule
[SKILL] Complex form validation flow → Suggest skill creation
- Approve or reject each candidate: For each candidate, decide:
- Approve → Script writes to
.claude/rules/or.claude/skills/ - Reject → Skip this pattern
- Edit → Modify before saving
- Validate new content:
node .claude/hooks/scripts/validate-content.js
Ensures new rules/skills have valid frontmatter and don't conflict with existing content.
When to Use
- After a long coding session where you established new patterns
- When you notice yourself repeatedly making the same corrections
- After integrating a new library and establishing conventions
- Periodically to capture accumulated project knowledge
Note
The automatic PostToolUse hook (continuous-learning-v2.cjs) does lightweight extraction after every tool call. This /learn command runs a comprehensive analysis that catches patterns the real-time hook might miss.
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 · 57 lines · 17 tokens per session scan A a484ac92bd6c
learn is a skill published in the GitHub repository JubaKitiashvili/everything-react-native-expo (45 stars, last pushed 5mo ago), licensed MIT. It adds 17 tokens to every session and 449 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 94% identical to erne-learn, differing in 10 lines, and is treated as a copy.
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