Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/Yesterday-AI/skillsnpx agentmods add skills/yesterday-ai/skills/x-readerWrote 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/yesterday-ai/skills/x-reader)<a href="https://agentmods.dev/skills/yesterday-ai/skills/x-reader"><img src="https://agentmods.dev/badge/skills/yesterday-ai/skills/x-reader.svg" alt="Measured on agentmods" 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 | $0.00033 | $0.00627 |
| Opus 5 | $0.00016 | $0.00313 |
| Sonnet 5 | $0.00007 | $0.00125 |
| Haiku 4.5 | $0.00003 | $0.00063 |
Grade A, and why
x-reader 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 7d 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
X-Reader
Read any Twitter/X content -- tweets, threads, and long-form articles.
Strategy
X/Twitter URL received?
├── Simple tweet or Article → fxtwitter API (fast, free, no login-wall):
│ web_fetch "https://api.fxtwitter.com/<user>/status/<id>"
│ (For Articles: Check tweet.article.content.blocks[] for Draft.js content)
│
├── Medium Article → web_fetch (direct) or Freedium (fallback):
│ web_fetch "https://medium.com/<url>"
│ If teaser only: web_fetch "https://freedium.cfd/medium.com/<url>"
│
├── Thread (Full) → Playwright (via web-scraper):
│ node skills/web-scraper/scripts/scrape.js "<url>" --wait 5000
│
└── All methods fail → Ask user to paste or screenshot
Methods
1. fxtwitter API (Speed & Efficiency)
Best for single tweets and X Articles. No API key needed.
- Normal Tweets: Use
tweet.text,tweet.author.name, etc. - X Articles: Look into
tweet.article.content.blocks[]. Mapheader-twoto##andunstyledto paragraph.
2. oEmbed API (Legacy fallback)
web_fetch "https://publish.twitter.com/oembed?url=https://x.com/user/status/123"
3. Medium (Client-side Paywall bypass)
Medium paywalls are often client-side JS only. Raw web_fetch often gets the full HTML.
- Fallback (Freedium): Rewrite
medium.comtofreedium.cfd/medium.com.
4. Playwright (Reliability fallback)
For complex threads or when API methods fail.
node skills/web-scraper/scripts/scrape.js "<url>" --wait 5000
URL Detection
Recognize X/Twitter/Medium links:
https://x.com/<user>/status/<id>https://twitter.com/<user>/status/<id>https://x.com/i/article/<id>https://medium.com/<author>/<article-slug>
Depends On
- web-scraper -- Playwright rendering engine
Authored by ManniTheRaccoon & Robby. Merged by Yessy 🐾 2026-03-03.
What ships with it
1 file 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.
- 7d ago First seen · 70 lines · 33 tokens per session scan A a07fd9f39bf7
x-reader is a skill published in the GitHub repository Yesterday-AI/skills (2 stars, last pushed 4d ago), licensed MIT. It adds 33 tokens to every session and 627 once invoked, about $0.0002 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 2026-08-31.
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