An approval role for AgentNexus nodes that reviews incoming agent-to-agent connection requests. Agent-to-agent, or A2A, connections let separate software agents communicate.

It is for examining incoming A2A connection requests and approving or denying them on behalf of the node owner.

It provides a review point before another agent is allowed to connect to a node.

How kevinkaylie/AgentNexus configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to kevinkaylie/AgentNexus. 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/kevinkaylie/AgentNexus/main/.claude/commands/gatekeeper.md

Clone the repo

git clone --depth 1 https://github.com/kevinkaylie/AgentNexus

Made for: Claude Code.

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/commands/kevinkaylie/agentnexus/gatekeeper/github.svg)](https://agentmods.dev/commands/kevinkaylie/agentnexus/gatekeeper)

Your own site

<a href="https://agentmods.dev/commands/kevinkaylie/agentnexus/gatekeeper"><img src="https://agentmods.dev/badge/commands/kevinkaylie/agentnexus/gatekeeper/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/commands/kevinkaylie/agentnexus/gatekeeper"><img src="https://agentmods.dev/badge/commands/kevinkaylie/agentnexus/gatekeeper.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 47 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 2,408 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 unknown 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	$0.00047	$0.02408
Opus 5.5	$0.00019	$0.00963
Sonnet 5.5	$0.00009	$0.00482
Haiku 4.5	$0.00005	$0.00241

Measured 2mo ago against content hash cbed00552ee2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

gatekeeper 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 2mo 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.

.claude/commands/gatekeeper.md · 250 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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.

2mo ago First seen · 250 lines · 47 tokens per session scan A cbed00552ee2

Subscribe to this mod's changes

gatekeeper is a command published in the GitHub repository kevinkaylie/AgentNexus (10 stars, last pushed 1mo ago), with no licence file. It adds 47 tokens to every session and 2,408 once invoked, about $0.0002 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.

Building agents agent-communication ai-agents decentralized did e2e-encryption ed25519

gatekeeper next to 6 commands from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
gatekeeperkevinkaylie/AgentNexus	Command	10	1mo ago	none	A	47	Claude Code
testcsmar432/finai-research	Command	109	4d ago	MIT	A	0	Claude Code
lit-reviewcsmar432/finai-research	Command	109	4d ago	MIT	A	0	Claude Code
briefcsmar432/finai-research	Command	109	4d ago	MIT	A	0	Claude Code
askKomdosh/komnet	Command	8	2d ago	MIT	A	25	Claude Code
scriptwriter-opencambridgetcg/agenttool	Command	0	yesterday	Apache-2.0	A	47	Claude Code
scriptwriter-paircambridgetcg/agenttool	Command	0	yesterday	Apache-2.0	A	38	Claude Code

AgentNexus: Command for Claude Code