What is kloakt AGENTS.md?

A project-specific instruction set for Kloakt, a Rust/V8 headless browser for fetching, rendering, and extracting web pages. It documents the project’s architecture, build commands, and available command-line operations.

Use it when changing Kloakt’s Rust workspace, building its release binary, or working on commands such as fetching, scraping, screenshots, sessions, and page extraction.

It gives a coding agent the context needed to build and modify Kloakt correctly. It also explains how the browser handles page extraction, JavaScript applications, and persistent sessions.

How KultMember6Banger/kloakt configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to KultMember6Banger/kloakt. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/KultMember6Banger/kloakt/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/KultMember6Banger/kloakt

Made for: Codex, OpenCode.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/kultmember6banger/kloakt/agents-md/github.svg)](https://agentmods.dev/instructions/kultmember6banger/kloakt/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/kultmember6banger/kloakt/agents-md"><img src="https://agentmods.dev/badge/instructions/kultmember6banger/kloakt/agents-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/kultmember6banger/kloakt/agents-md"><img src="https://agentmods.dev/badge/instructions/kultmember6banger/kloakt/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 879 This file is loaded in full into every session.

When invoked 879 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00879	$0.00879
Opus 5	$0.00439	$0.00439
Sonnet 5	$0.00176	$0.00176
Haiku 4.5	$0.00088	$0.00088

Measured 8d ago against content hash 37136b3a52ee, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

kloakt AGENTS.md 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 8d 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.

AGENTS.md · 79 lines

How it starts

The opening of the file, as written. The whole thing — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Kloakt

Cloaked headless browser for AI agents. Rust/V8, 30MB memory, stealth TLS fingerprinting.

Build

cargo build --release
cargo build --release --features stealth  # anti-detection + tracker blocking

Requires Rust 1.75+. First build takes ~5 min (V8 compiles from source, cached after).

Binary output: target/release/kloakt

Architecture

Rust workspace with 6 crates:

obscura-dom — DOM tree implementation
obscura-net — HTTP client, TLS, cookie jar
obscura-browser — page lifecycle, navigation, JS evaluation
obscura-cdp — Chrome DevTools Protocol server
obscura-js — V8 bindings via deno_core
obscura-cli — CLI binary (kloakt): extract/fetch/scrape/serve/snapshot/screenshot/session/benchmark commands (CDP websocket client for sessions in session.rs)

The extract command runs a 3-phase pipeline: noise removal → text-density scoring → markdown conversion. SPA fallback pre-extracts meta/JSON-LD/noscript before DOM manipulation.

Persistent sessions: kloakt serve holds named BrowserContexts (the CDP Session domain in obscura-cdp/src/domains/session.rs); the kloakt session client (obscura-cli/src/session.rs) drives them over a websocket, persisting ~/.kloakt/sessions/<name>.json so cookies + page/JS state survive across separate invocations. snapshot emits an accessibility/structure tree; screenshot delegates to system Chrome (no rasterizer in-tree).

Key Commands

kloakt extract <URL> --json --main --max-chars 3000
kloakt fetch <URL> --dump markdown --eval "document.title"
kloakt serve --port 9222 --stealth
kloakt scrape url1 url2 --concurrency 10 --format json
kloakt snapshot <URL> --interactive            # accessibility/structure tree
kloakt screenshot <URL> --output shot.png      # real PNG via system Chrome
kloakt session open s --url <URL>              # then: nav/eval/text/snapshot/click/type/list/close

Python API

from kloakt import (
    extract, extract_fields, fetch, scrape, search, crawl,
    snapshot, screenshot, session_open, session_close,  # ...session_nav/_eval/_text/_click/_type
)

Read the full file on GitHub · 79 lines

Changes

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.

8d ago First seen · 79 lines · 879 tokens per session scan A 37136b3a52ee

Subscribe to this mod's changes

kloakt AGENTS.md is an instructions file published in the GitHub repository KultMember6Banger/kloakt (1 stars, last pushed 12d ago), licensed Apache-2.0. It adds 879 tokens to every session, about $0.0044 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.

Browser automation

next.js AGENTS.md

AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.

vercel/next.js · 7,296 tokens

codex AGENTS.md

AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.

openai/codex · 5,153 tokens

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 6,785 tokens

kloakt: Instructions file for Codex