Borrowing it
Nothing to install: this file belongs to AssemblyAI/blurt. 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/AssemblyAI/blurt/main/.claude/skills/check/SKILL.mdgit clone --depth 1 https://github.com/AssemblyAI/blurtWrote 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/assemblyai/blurt/check)<a href="https://agentmods.dev/skills/assemblyai/blurt/check"><img src="https://agentmods.dev/badge/skills/assemblyai/blurt/check/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/assemblyai/blurt/check"><img src="https://agentmods.dev/badge/skills/assemblyai/blurt/check.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 | $0.00159 | $0.02091 |
| Opus 5.5 | $0.00064 | $0.00836 |
| Sonnet 5.5 | $0.00032 | $0.00418 |
| Haiku 4.5 | $0.00016 | $0.00209 |
Grade A, and why
check 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 27d 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 — 139 lines — stays where its author put it; the contents beside it link to each section on GitHub.
check — is this green?
scripts/check.sh is the single source of truth for "is this green?" It is
exactly what CI (.github/workflows/check.yml, macos-26) runs, so a clean
local check.sh matches CI by construction.
Before you run: the macOS-only guard
Blurt is macOS-only (platforms: [.macOS(.v15)], AppKit + AVFoundation). The
engine imports AVFoundation, so even the SPM package won't compile off-Mac.
If swift/xcodebuild/xcodegen are unavailable (Linux or web sandbox):
do not run the full check.sh (it fails fast anyway), and never claim a
build/test passed. Say plainly: "Verification must happen on a Mac — CI runs the
full check.sh on macos-26 and is the authority on green." You may still
read/edit Swift, reason about the pipeline, and write tests for later
verification — just don't assert they pass.
What you CAN run there is the portable subset:
scripts/check.sh --portable
It runs the repo-integrity guards — dependencies, sound catalog, shell
portability, and settled decisions — then actionlint, zizmor, prettier, xmllint,
markdownlint, shellcheck, shfmt, ruff (lint + format check), pytest over
evals/, and release.test.sh. swift-format lint and swiftlint lint join
them when Linux builds are on PATH; under the default web network policy they
are not.
That fully verifies docs, scripts, eval, and workflow changes. It is
not "green" in the CI sense: the entire Swift side is skipped, and the
closing line says so. For Swift changes, push and watch check.yml instead —
its compile job reports a broken test build in ~2 minutes, and format-patch
publishes the exact swift-format reflow as an artifact so you don't have to
reproduce it by hand. In Claude Code on the web, the SessionStart hook
installs the portable linters automatically.
Quick preflight:
command -v swift xcodebuild xcodegen >/dev/null 2>&1 \
&& echo "macOS toolchain present — safe to run check.sh" \
|| echo "NO toolchain — only check.sh --portable works; Swift verification happens on a Mac/CI"
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.
- 27d ago Changed · +13 lines ecfdf7664c06
- 1mo ago Changed · -3 lines · -5 tokens per session 3c4055f87fd4
- 2mo ago First seen · 129 lines · 164 tokens per session scan A 16ca1507a565
check is a skill published in the GitHub repository AssemblyAI/blurt (65 stars, last pushed today), licensed MIT. It adds 159 tokens to every session and 2,091 once invoked, about $0.0006 per session on Opus 5.5. 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.
Other skills, from other repositories
critique
Adversarial design critique of the current work. Render it, look at it, and argue for rejection. Run after the gates are green, never instead of them.
test-warp-ui
Guides testing Warp UI features and changes using the computer use tool. Use this skill only when computer-use testing was requested (explicit request or accepted offer) and the computeruse tool is available to the agent. Covers launching Warp and verifying UI behavior.
scarf-miniapp-author
Author a Scarf mini-app — a small sandboxed web surface (HTML/CSS/JS) that renders inside a project's cockpit and talks to the bound Hermes session + project data through the versioned window.scarf bridge. Use to build a bespoke panel (a task board, an approval queue, a chart, a data table) for a project.
ship
Pre-release gate. Run the full gate, responsive + render checks, then produce the release checklist (README badge/current/changelog). Use before tagging a release.
macos-harness
Read and operate the apps on this Mac from the shell. Use it when a task needs an app's UI and no API, CLI or purpose-built tool can do it.
a11y-ally
Use when running comprehensive WCAG accessibility audits with axe-core + pa11y + Lighthouse, generating context-aware remediation, or testing video accessibility. Supports 3-tier browser cascade with graceful degradation.