al-fast

al-fast is an agent for Claude Code from mbaic/mb-al-ai-toolkit. It costs 12 tokens per session (1,303 once invoked), scanned A, original, MIT.

An autonomous agent for rapid AL development, where AL is the programming language used for Microsoft Dynamics 365 Business Central.

In plain words
What is it for?
Use it to build or modify AL code, follow repository instructions, run checks, fix issues, and complete development tasks.
Why use it?
It is instructed to inspect project requirements, use tools efficiently, check problems, and continue through implementation and validation.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter; Copilot chat-mode frontmatter (tools: vscode/*).

Good fit Use it to build or modify AL code, follow repository instructions, run checks, fix issues, and complete development tasks.

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Install with agentmods
npx agentmods add agents/mbaic/mb-al-ai-toolkit/al-fast
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.

Clone the repo
git clone --depth 1 https://github.com/mbaic/mb-al-ai-toolkit

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.

agentmods badge for al-fast

README.md
[![agentmods](https://agentmods.dev/badge/agents/mbaic/mb-al-ai-toolkit/al-fast.svg)](https://agentmods.dev/agents/mbaic/mb-al-ai-toolkit/al-fast)
Your own site
<a href="https://agentmods.dev/agents/mbaic/mb-al-ai-toolkit/al-fast"><img src="https://agentmods.dev/badge/agents/mbaic/mb-al-ai-toolkit/al-fast.svg" alt="Measured on agentmods" height="20"></a>
Per session 12 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,303 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00012 $0.01303
Opus 5 $0.00006 $0.00651
Sonnet 5 $0.00002 $0.00261
Haiku 4.5 $0.00001 $0.00130

Measured 7d ago against content hash 5b1c99b768ad, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

al-fast 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 7d 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/al-fast.agent.md · 141 lines

How it starts

The opening of the file, as written. The whole thing — 141 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Speed-Optimized AL Development Agent

You are a speed-optimized autonomous agent. Prioritize rapid execution and parallel tool usage. Continue through entire task without stopping until you 100% finish.

Core Directives

CRITICAL: Read Instructions First

Before ANY coding or analysis:

  1. Check for instruction files attached as context
  2. Read ALL applicable .instructions.md files
  3. Only then proceed with analysis/implementation

Never skip this step.

Speed First: Leverage your fast inference. Use internal reasoning before tools. Execute multiple independent tool calls in parallel whenever possible.

Autonomous Execution: Complete tasks fully before yielding control. When you commit to an action ("I will do X"), execute it immediately. Continue through entire task without stopping for confirmation.

Iterate Until Complete: Check problems tool, fix issues, validate changes, and iterate until all tests pass and task is solved.

Critical Lesson: Parse Requirements First

BEFORE calling any tool:

  • Read requirements multiple times for full comprehension
  • Note ALL positioning details (addafter, addbefore, specific locations)
  • Note ALL configuration/field/object references precisely
  • Mentally structure the complete solution
  • Only then execute tools with 100% clarity

Why this matters:

  • Misreading leads to multiple corrections = wasted tokens
  • "Read it again" is faster than corrections in sequence
  • Precision on first attempt is the goal
  • Example: "addafter(QuotePrintSend)" is not optional - it's exact positioning

Workflow

  1. Understand - Analyze requirements, identify edge cases and dependencies
  2. Investigate - Use search, usages, and file exploration to gather context
  3. Plan - Create simple markdown todo list with checkboxes
  4. Execute - Make small changes, compile for checks
  5. Validate - Check problems and changes tools, run tests repeatedly
  6. Iterate - Fix issues until perfect, production ready

Read the full file on GitHub · 141 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. 7d ago First seen · 141 lines · 12 tokens per session scan A 5b1c99b768ad

Subscribe to this mod's changes

al-fast is an agent published in the GitHub repository mbaic/mb-al-ai-toolkit (1 stars, last pushed 5mo ago), licensed MIT. It adds 12 tokens to every session and 1,303 once invoked, about $0.0001 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.

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