ALDC-AL-Development-Collection: Instructions file for Claude Code

CLAUDE.md

ALDC-AL-Development-Collection CLAUDE.md is an instructions file for Claude Code from javiarmesto/ALDC-AL-Development-Collection. It costs 1,694 tokens per session, scanned A, original, MIT.

A set of Claude Code instructions for developing extensions in AL, the programming language used by Microsoft Dynamics 365 Business Central. It defines design rules, agent routing, testing steps, and development workflows.

In plain words
What is it for?
Use it to plan, implement, debug, review, and test Business Central extensions, including table and page changes, integrations, permissions, and translated user-facing text.
Why use it?
It helps keep Business Central changes separate from the standard application and guides the coding agent through agreed steps, including user approval and tests.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions subagents; mentions Claude Code.

This is javiarmesto/ALDC-AL-Development-Collection's own configuration. It tells Claude Code how to work on ALDC-AL-Development-Collection 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 ALDC-AL-Development-Collection configures →

Reuse

Borrowing it

Nothing to install: this file belongs to javiarmesto/ALDC-AL-Development-Collection. 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/javiarmesto/ALDC-AL-Development-Collection/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/javiarmesto/ALDC-AL-Development-Collection

Made for: Claude Code.

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README.md
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Per session 1,694 This file is loaded in full into every session.
When invoked 1,694 The same file — it is already loaded in full.
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 $0.01694 $0.01694
Opus 5 $0.00847 $0.00847
Sonnet 5 $0.00339 $0.00339
Haiku 4.5 $0.00169 $0.00169

Measured 10d ago against content hash 4a7c7fc8781f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

ALDC-AL-Development-Collection CLAUDE.md 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 10d 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.md · 165 lines

How it starts

The opening of the file, as written. The whole thing — 165 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ALDC — Claude Code Instructions

@import ./docs/framework/ALDC-Core-Spec-v1.2.md

Overview

AL (Application Language) workspace for Microsoft Dynamics 365 Business Central. Architecture: ALDC Core v1.2 — 10 agents (4 core + 2 on-demand + 3 subagents + 1 extension) + 16 skills + 11 workflows + 9 instructions.

Core Principles

  • Extension-only development — Never modify base application objects. Use tableextensions, pageextensions, event subscribers.
  • Human-in-the-Loop (HITL) — All critical decisions require user confirmation before proceeding.
  • TDD / spec-driven — Features follow: spec.create -> architecture -> test-plan -> implementation -> review.
  • Least privilege — Generate only the minimum permissions required. Use XLIFF for all user-facing strings.

Agent Routing

Intent Agent What it does
Design, architecture, strategy delegate to agent al-architect Solution design, data modeling, integration strategy
Implement, code, debug, fix delegate to agent al-developer Tactical implementation with full AL MCP tools
TDD orchestration (plan -> implement -> review -> commit) delegate to agent al-conductor Orchestrates planning, implementation, and review subagents
Estimate, size, propose delegate to agent al-presales PERT estimation, SWOT analysis, cost breakdown

Quick Routing

New feature (MEDIUM/HIGH)? -> al-architect -> /al-spec.create -> al-conductor
New feature (LOW)?         -> /al-spec.create -> al-developer
Bug fix / debugging?       -> al-developer
Architecture review?       -> al-architect
Full TDD cycle?            -> al-conductor
Project estimation?        -> al-presales

Workflows

11 workflows (6 core + 5 BC Agents pack). The 6 core, invoked via /workflow-name:

Workflow When to use
/al-spec.create Create functional-technical specifications before development
/al-build Build, package, and deploy extensions
/al-pr-prepare Prepare pull requests with documentation and validation
/al-memory.create Generate/update memory.md for session continuity
/al-context.create Generate project context.md for AI assistants
/al-initialize Complete environment and workspace setup

Read the full file on GitHub · 165 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. 10d ago First seen · 165 lines · 1,694 tokens per session scan A 4a7c7fc8781f

Subscribe to this mod's changes

ALDC-AL-Development-Collection CLAUDE.md is an instructions file published in the GitHub repository javiarmesto/ALDC-AL-Development-Collection (103 stars, last pushed 3d ago), licensed MIT. It adds 1,694 tokens to every session, about $0.0085 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 2026-08-30.

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