A toolkit for building cross-platform agent projects with Bun, Rust, and native browser or social-network connections. It provides shared code patterns, commands, checks, and integrations for this type of project.

Use it when developing bxc-based navigation engines, native X or Grok clients, web scrapers, Rust-to-Bun connections, or agent workflows that combine browsing and social-network actions.

It gives teams consistent rules for naming, testing, authentication, and cross-platform builds. It also avoids starting a separate browser process for many tasks.

bxc-core — Skill for Claude Code by aphrody-code/bxc

Install

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.

Any agent

npx skills add aphrody-code/bxc --skill bxc-core

Clone the repo

git clone --depth 1 https://github.com/aphrody-code/bxc

Made for: Claude Code.

Or install bxc, the plugin that ships this one along with the rest of its 22 skills, 3 commands.

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/skills/aphrody-code/bxc/bxc-core/github.svg)](https://agentmods.dev/skills/aphrody-code/bxc/bxc-core)

Your own site

<a href="https://agentmods.dev/skills/aphrody-code/bxc/bxc-core"><img src="https://agentmods.dev/badge/skills/aphrody-code/bxc/bxc-core/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/skills/aphrody-code/bxc/bxc-core"><img src="https://agentmods.dev/badge/skills/aphrody-code/bxc/bxc-core.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 102 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,097 The whole file, excluding the scripts and references it only reads on demand.

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	$0.00102	$0.01097
Opus 5.5	$0.00041	$0.00439
Sonnet 5.5	$0.00020	$0.00219
Haiku 4.5	$0.00010	$0.00110

Measured 1mo ago against content hash e23a633a6592, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

bxc-core 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 1mo 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.

plugins/bxc/skills/bxc-core/SKILL.md · 62 lines

How it starts

The opening of the file, as written. The whole thing — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.

bxc — Zero-Spawn Native Browser Engine for Agents (toolkit)

bxc is a production-grade, cross-platform (Linux/macOS/Windows) "zero-spawn" navigation engine for AI agents: Bun runtime + Rust cdylib FFI (lol_html, html5ever, V8 bindings, X GraphQL client, For-You ranking algo port) + Zig DOM history in some components. No Chromium spawn for most workloads.

The bxc plugin provides reusable skills, dedicated sub-agents, commands, hooks, and MCP integration so any project can adopt the same architecture, patterns, and quality bars (bxc* naming, scoped testing, native keyless clients, agentic Grok+X loops, monorepo scrapers, autopilot).

Codex integration

When running in Codex, use the .codex-plugin/plugin.json manifest and the skills/ tree. The bxc-build, bxc-new-scraper, and bxc-verify skills are the Codex equivalents of the Claude slash commands. Do not depend on Claude hooks or Claude-only agent invocation; use the available Codex tools and the global bxc-mcp command instead.

Core Principles (always follow)

Naming: Every identifier, binary, doc, crate, package must use bxc* prefix. Rebrand is final — never reintroduce old names.
Test scope: Always bun test test/ packages/ src/ (or more specific). Never bare bun test (it discovers vendor/mcp-sdk and produces noise/failures).
Zero keys where possible: Prefer SUPER_GROK_TOKEN / ~/.grok/auth.json for xai, cookie auth_token+ct0 for X (via XSession). No paid API keys for core flows.
Native first: Use the real @aphrody/x XClient and @aphrody/xai Chat + XTools for agentic flows instead of external APIs.
FFI discipline: Rust cdylibs (bxc-rust-bridge) for hot paths (DOM, ranking, lol_html). Workspace rusqlite 0.37 for sqlite links. Build with bun run build:linux or cargo --release.
Cross-platform: Bun works everywhere. Rust produces .so / .dylib / .dll. Provide notes/scripts for all three OS.
MCP exposure: The bxc-native-mcp (in src/mcp/server.ts) exposes tools; extend with registerTool + Zod. Build to dist/standalone/bxc-mcp.
Autonomy: The autopilot.sh + monitors + subagents pattern for continuous verify/build/docs.

Read the full file on GitHub · 62 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.

1mo ago Changed · +9 lines e23a633a6592
1mo ago First seen · 53 lines · 102 tokens per session scan A 907aa558b5e7

Subscribe to this mod's changes

bxc-core is a skill published in the GitHub repository aphrody-code/bxc (3 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 102 tokens to every session and 1,097 once invoked, about $0.0004 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.

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