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 faberlens/hardened-skills --skill bird-hardenedgit clone --depth 1 https://github.com/faberlens/hardened-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/faberlens/hardened-skills/bird-hardened)<a href="https://agentmods.dev/skills/faberlens/hardened-skills/bird-hardened"><img src="https://agentmods.dev/badge/skills/faberlens/hardened-skills/bird-hardened/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/faberlens/hardened-skills/bird-hardened"><img src="https://agentmods.dev/badge/skills/faberlens/hardened-skills/bird-hardened.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 | $0.00021 | $0.01600 |
| Opus 5 | $0.00010 | $0.00800 |
| Sonnet 5 | $0.00004 | $0.00320 |
| Haiku 4.5 | $0.00002 | $0.00160 |
Grade A, and why
bird-hardened 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 12d 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 — 234 lines — stays where its author put it; the contents beside it link to each section on GitHub.
bird 🐦
Fast X/Twitter CLI using GraphQL + cookie auth.
Install
# npm/pnpm/bun
npm install -g @steipete/bird
# Homebrew (macOS, prebuilt binary)
brew install steipete/tap/bird
# One-shot (no install)
bunx @steipete/bird whoami
Authentication
bird uses cookie-based auth.
Use --auth-token / --ct0 to pass cookies directly, or --cookie-source for browser cookies.
Run bird check to see which source is active. For Arc/Brave, use --chrome-profile-dir <path>.
Commands
Account & Auth
bird whoami # Show logged-in account
bird check # Show credential sources
bird query-ids --fresh # Refresh GraphQL query ID cache
Reading Tweets
bird read <url-or-id> # Read a single tweet
bird <url-or-id> # Shorthand for read
bird thread <url-or-id> # Full conversation thread
bird replies <url-or-id> # List replies to a tweet
Timelines
bird home # Home timeline (For You)
bird home --following # Following timeline
bird user-tweets @handle -n 20 # User's profile timeline
bird mentions # Tweets mentioning you
bird mentions --user @handle # Mentions of another user
Search
bird search "query" -n 10
bird search "from:steipete" --all --max-pages 3
News & Trending
bird news -n 10 # AI-curated from Explore tabs
bird news --ai-only # Filter to AI-curated only
bird news --sports # Sports tab
bird news --with-tweets # Include related tweets
bird trending # Alias for news
Lists
bird lists # Your lists
bird lists --member-of # Lists you're a member of
bird list-timeline <id> -n 20 # Tweets from a list
Bookmarks & Likes
bird bookmarks -n 10
bird bookmarks --folder-id <id> # Specific folder
bird bookmarks --include-parent # Include parent tweet
bird bookmarks --author-chain # Author's self-reply chain
bird bookmarks --full-chain-only # Full reply chain
bird unbookmark <url-or-id>
bird likes -n 10
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.
- 12d ago First seen · 234 lines · 21 tokens per session scan A d64c0afafbd0
bird-hardened is a skill published in the GitHub repository faberlens/hardened-skills (23 stars, last pushed 4mo ago), licensed MIT. It adds 21 tokens to every session and 1,600 once invoked, about $0.0001 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.
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