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agent-kernel: Skill for Claude Code

.agents/skills/ak-dev-new-messaging-integration/SKILL.md

ak-dev-new-messaging-integration is a skill for Claude Code, Codex from yaalalabs/agent-kernel. It costs 80 tokens per session (4,305 once invoked), scanned A, original, Apache-2.0.

A step-by-step development guide for adding support for a new chat or messaging platform to Agent Kernel, an agent software framework. It covers the platform's incoming messages, webhooks, settings, and replies.

In plain words
What is it for?
Use it to build a new messaging integration, including its webhook routes, message and attachment handling, configuration, agent calls, and response formatting.
Why use it?
It explains where a new platform connects to the framework, reducing the chance of bypassing the framework's intended message-processing path.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

This is yaalalabs/agent-kernel's own configuration. It tells Claude Code and Codex how to work on agent-kernel itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything agent-kernel configures →

not rated 192repo +1 changed today A scan SkillSpector: pass 80 tokens original Apache-2.0
View source ↗ yaalalabs/agent-kernel kernel.yaala.ai
Reuse

Borrowing it

Nothing to install: this file belongs to yaalalabs/agent-kernel. 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/yaalalabs/agent-kernel/develop/.agents/skills/ak-dev-new-messaging-integration/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/yaalalabs/agent-kernel

Made for: Claude Code, Codex.

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<a href="https://agentmods.dev/skills/yaalalabs/agent-kernel/ak-dev-new-messaging-integration"><img src="https://agentmods.dev/badge/skills/yaalalabs/agent-kernel/ak-dev-new-messaging-integration.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 80 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,305 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00080 $0.04305
Opus 5.5 $0.00032 $0.01722
Sonnet 5.5 $0.00016 $0.00861
Haiku 4.5 $0.00008 $0.00430

Measured today against content hash 4b4d2fb842ab, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ak-dev-new-messaging-integration 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 today.

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/skills/ak-dev-new-messaging-integration/SKILL.md · 334 lines

How it starts

The opening of the file, as written. The whole thing — 334 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Adding a New Messaging Integration

This guide walks through adding a new messaging platform integration to Agent Kernel. Use the WhatsApp adapter (ak-py/src/agentkernel/integration/whatsapp/adapter.py) as the canonical webhook reference, and Gmail (integration/gmail/adapter.py) as the polling one.

Architecture Overview

A platform integration is two pure translation functions with a queue between them (spec #524):

  1. An InboundAdapter turns one platform delivery into normalized InboundRequest envelopes: it verifies the delivery, extracts the text, downloads and stores attachments, and resolves session_id and request_id at the edge. It never runs the agent.
  2. The pipeline carries the request: IntegrationProducer enqueues it, AgentRunner executes it platform-agnostically, and the reply travels back on the output queue with the integration attribute and the reply_-prefixed reply context.
  3. An OutboundAdapter turns the agent's reply back into platform API calls, using nothing but the flat reply_context the inbound half resolved.

This is why the webhook answers in milliseconds: a slow agent run can no longer hold the turn open past the platform's delivery timeout and cause a redelivery.

Hosting depends on how the platform delivers events:

Source Host Entry point
Source.WEBHOOK (pushed) WebhookRESTRequestHandler IOHandler.run(handlers=[WebhookRESTRequestHandler(MyInboundAdapter())])
Source.WEBHOOK on AWS Lambda WebhookRESTRequestHandler via LambdaWebhookHost host = LambdaWebhookHost(WebhookRESTRequestHandler(MyInboundAdapter())) at module scope in the request-handler Lambda, with Lambda.register(<webhook_path>, method="POST")(host.handle) (and GET → host.challenge when the adapter declares a challenge_path) (rest_sync/rest_async, sqs), with the route in gateway_endpoints and APIGatewayAuthorizer(bypass=WebhookRouteMatcher(...)) behind an authorizer
Source.POLLER (pulled) PollerRunner IOHandler.run(pollers=[PollerRunner(MyInboundAdapter())]) on in_memory, PollerRunner.run(adapter) as its own container on a broker

Read the full file on GitHub · 334 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.

  1. today Changed 4b4d2fb842ab
  2. 29d ago Changed · +15 lines 9f9fc197185a
  3. 1mo ago Changed · +3 lines 269e151cfea3
  4. 1mo ago Changed · +1 lines · +6 tokens per session 0100409aaffb
  5. 1mo ago Changed · +3 lines adf362ac7cff
  6. 2mo ago First seen · 312 lines · 74 tokens per session scan A 0cb3dadbbff7

Subscribe to this mod's changes

ak-dev-new-messaging-integration is a skill published in the GitHub repository yaalalabs/agent-kernel (192 stars, last pushed yesterday), licensed Apache-2.0. It adds 80 tokens to every session and 4,305 once invoked, about $0.0003 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 2026-08-30.

Backend and APIsa2aadkai-agentsawsazurecloud-native
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