nock

Nock the command, draw, fire.

nock is an AI-aware command launcher for pentesters and operators. It holds the hard-to-remember commands you need mid-engagement, fills in your variables (target, domain, wordlist) once, and hands the finished command to your shell — or to an AI agent over MCP. Single Go binary, no runtime dependencies, provider-agnostic AI, works online or fully offline.

Inspired by Orange-Cyberdefense/arsenal, rebuilt from scratch: engine-first, agent-native, vendor-neutral. See ROADMAP.md for the full plan and design decisions.

⚠️ For authorized security testing only. You are responsible for having permission to run what you launch. See SECURITY.md.

The problem

Mid-engagement, you burn seconds you don't have recalling the exact flags — or your cheatsheets rot in a scratch file you grep by hand and re-type. When recall is slower than just remembering it, the tool has failed.

nock makes recall instant: fuzzy-search the command, set your target once, review the fully-resolved line, fire. Same knowledge, two keystrokes instead of twenty.

Why nock

• Single static binary (Go) — instant startup, trivial distribution, no Python/runtime drift.
• Engine-first — one command engine; the TUI, the MCP server, and a future web UI are thin frontends over it.
• Agent-native — ships an MCP server so Claude Code, Cursor, Continue, and other hosts can query your command knowledge directly. In MCP mode the host pays its own model cost; nock makes no LLM calls of its own.
• Provider-agnostic AI — command suggestion behind one interface: Anthropic, OpenAI-compatible (OpenAI, Groq, Together, vLLM, LocalAI, …), or Ollama for a fully offline / air-gapped path.
• Graceful degradation — fuzzy search needs no AI and no network. AI ranking layers on only when configured.

At a glance

	raw notes	arsenal	nock
Set a variable once, fill it everywhere	🔴	🟢	🟢
Single static binary, no runtime drift	—	🔴	🟢
Works offline / air-gapped	🟢	🟢	🟢
Optional AI ranking	🔴	🔴	🟢
MCP / agent-native (query from Claude, Cursor…)	🔴	🔴	🟢

arsenal pioneered fast command recall; nock keeps the idea and modernizes the architecture — engine-first, agent-native, single Go binary.

Status

Early. Milestone 0 (scaffold) is in place: the engine, fuzzy search, the variable resolver, the cheatsheet schema, and a scriptable CLI work today. The TUI, MCP server, AI ranker, and arsenal importer are stubbed and land per the roadmap.

Quick start

# Build
make build
# Search the example cheatsheets (offline, no AI)
./bin/nock search web directories
# Resolve a command's variables
./bin/nock resolve nmap-service-scan --var target=10.0.0.5
# -> nmap -sV -sC -oA scans/10.0.0.5 10.0.0.5# Version / help
./bin/nock version
./bin/nock help

Point nock at your own cheatsheets:

export NOCK_CHEATSHEETS=/path/to/your/cheatsheets
./bin/nock search smb

What it feels like

The interactive TUI (Milestone 2) is the search → fill → fire loop end to end:

› nmap serv # fuzzy-search as you type
[recon] nmap-service-scan nmap -sV -sC -oA scans/<target> <target>
<target> = 10.0.0.5 # fill each variable once
✓ nmap -sV -sC -oA scans/10.0.0.5 10.0.0.5 # review the resolved line, then fire

Nothing runs until you confirm, and what's shown is exactly what's emitted — no hidden expansion (show-before-fire). An asciinema recording lands with the TUI.

Modes

Command	Mode	Status
nock	Interactive TUI	stub (M2)
nock --mcp	MCP server over stdio	stub (M3)
nock search <query>	Non-interactive search	✅
nock resolve <id> --var k=v	Fill & print a command	✅
nock import <src>	Import arsenal cheatsheets	stub (M0/1)
nock serve	Team HTTP/SSE server	stub (M5)

Cheatsheet format

Cheatsheets are data and the project's stable contract. The Go definition lives in pkg/format; a JSON Schema is at pkg/format/schema.json. Commands use <name> placeholders, resolved from the variable store:

{
"schema_version": "1",
"name": "recon",
"commands": [
{
"id": "nmap-service-scan",
"name": "nmap service/version scan",
"command": "nmap -sV -sC -oA scans/<target> <target>",
"intent": "identify open ports and the service versions behind them",
"tags": ["nmap", "scan"],
"risk": "low"
}
]
}

YAML is the primary authoring format; JSON is accepted for tooling and interchange. The codec is chosen by file extension, and a sheet round-trips through either into the same structs.

Documentation

Versioned, in-repo docs live in docs/:

• Install — source, go install, release binaries.
• CLI reference — every mode and flag.
• Cheatsheet schema — the pkg/format authoring contract.
• MCP setup — exposing nock to AI agents (Milestone 3).
• Contributing — dev loop, git-flow branching, and the CodeRabbit review workflow (@coderabbitai review on PRs to develop/main).
• Releasing — how a version tag becomes a cross-platform release.

Narrative and community content (tutorials, FAQ, operator workflows) lives in the Wiki.

Architecture

cmd/nock single binary, mode switch
internal/engine THE product: search + variable resolution (one source of truth)
internal/search zero-dependency fuzzy matcher
internal/vars global variable store (set once, fill everywhere)
internal/cheatsheet load + validate cheatsheets
internal/ai provider-agnostic ranker (Anthropic / OpenAI-compat / Ollama)
internal/mcp MCP server frontend
internal/tui Bubble Tea frontend
pkg/format cheatsheet schema — the stable public contract

Frontends call the engine and nothing else; AI is always an optional layer. See CONTRIBUTING.md for the architecture rules.

License

Apache-2.0. nock is an independent, clean-room project: no arsenal source code is copied, and arsenal's GPL-3.0 cheatsheet content is never bundled — the importer fetches it onto your machine. See NOTICE.