Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add ckorhonen/claude-skills --skill bird-fastgit clone --depth 1 https://github.com/ckorhonen/claude-skillsWrote 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/ckorhonen/claude-skills/bird-fast)<a href="https://agentmods.dev/skills/ckorhonen/claude-skills/bird-fast"><img src="https://agentmods.dev/badge/skills/ckorhonen/claude-skills/bird-fast/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/ckorhonen/claude-skills/bird-fast"><img src="https://agentmods.dev/badge/skills/ckorhonen/claude-skills/bird-fast.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 | $0.00049 | $0.02317 |
| Opus 5 | $0.00024 | $0.01158 |
| Sonnet 5 | $0.00010 | $0.00463 |
| Haiku 4.5 | $0.00005 | $0.00232 |
Grade A, and why
bird-fast 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 11d 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 — 335 lines — stays where its author put it; the contents beside it link to each section on GitHub.
bird CLI
A command-line interface for X/Twitter that authenticates via your existing browser session — no API keys or OAuth setup required.
Overview
bird is a TypeScript-based CLI that uses Twitter's internal GraphQL API with automatic query ID management. It extracts authentication cookies from Safari, Chrome, or Firefox.
Key Features:
- Zero-config authentication via browser cookies
- Full tweet lifecycle: post, reply, read, search
- Media uploads (images, GIFs, videos) with alt text
- Multiple output formats (human-readable, JSON, plain)
- Automatic GraphQL query ID refresh and REST API fallback
When to Use
- Posting tweets or replies from scripts or automation
- Reading and analyzing tweet threads programmatically
- Searching for mentions or specific content
- Monitoring Twitter activity from the CLI
Prerequisites
- Node.js >= 22 OR Homebrew (for standalone binary)
- Browser login: Must be logged into x.com in Safari, Chrome, or Firefox
Installation
# npm
npm install -g @steipete/bird
# pnpm
pnpm add -g @steipete/bird
# bun
bun add -g @steipete/bird
# Homebrew (macOS — standalone binary, no Node.js required)
brew install steipete/tap/bird
# One-shot execution (no install)
bunx @steipete/bird whoami
npx @steipete/bird whoami
Authentication
bird uses a three-tier priority chain:
| Priority | Source | How to Set |
|---|---|---|
| 1 (highest) | CLI flags | --auth-token, --ct0 |
| 2 | Environment variables | AUTH_TOKEN, CT0 (or TWITTER_AUTH_TOKEN, TWITTER_CT0) |
| 3 (default) | Browser cookies | Auto-extracted from Safari → Chrome → Firefox |
Verify authentication:
bird whoami # Shows authenticated user
bird check # Shows credential source
Quick Start
# Post a tweet
bird tweet "Hello from the terminal!"
# Read a tweet
bird read https://x.com/user/status/1234567890123456789
# Reply to a tweet
bird reply 1234567890123456789 "Great point!"
# Search tweets
bird search "from:elonmusk" -n 20
# View your mentions
bird mentions
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.
- 11d ago First seen · 335 lines · 49 tokens per session scan A 5255f973de85
bird-fast is a skill published in the GitHub repository ckorhonen/claude-skills (14 stars, last pushed 2mo ago), licensed MIT. It adds 49 tokens to every session and 2,317 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 2026-08-30.
Other skills, from other repositories
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dingtalk_channel_connect
A browser-based procedure for connecting a QwenPaw bot to DingTalk, a workplace messaging platform. It covers creating or configuring the application and publishing the finished bot.
browser_cdp
Use this skill when the user explicitly wants to connect to a running Chrome browser, scan local CDP ports, specify a cdpport, or share a single browser across multiple agents/tools. By default browser opens no debugging port; pass an explicit cdpport only when the user wants another local tool to attach.
browser_cdp
Browser connection controls for finding local debugging ports, attaching to an already running Chrome browser, or sharing one browser between tools.
browser_visible
Browser launch controls for choosing whether a Chromium-based browser window is visible, which browser program to run, and which startup options to pass.
browser_visible
Use this skill when the user needs to control the browser launch mode for browser. By default browser is managed by Playwright and opens no debugging port (pass an explicit cdpport to let another local tool attach); headed controls whether the window is visible, and privatemode is kept for backward compatibility and…