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.
npx agentmods add instructions/microsoft/ai-dev-gallery/adding-model-definitionsgit clone --depth 1 https://github.com/microsoft/ai-dev-galleryWhat 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 | $0.00544 | $0.00544 |
| Opus 5 | $0.00272 | $0.00272 |
| Sonnet 5 | $0.00109 | $0.00109 |
| Haiku 4.5 | $0.00054 | $0.00054 |
Grade A, and why
ai-dev-gallery adding-model-definitions.instructions.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 2d 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.
How it starts
The opening of the file, as written. The whole thing — 83 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Model and API Definition Instructions
When reviewing or modifying definition files in AIDevGallery/Samples/Definitions/:
.modelgroup.json - Model Group Definition
Used for organizing model families with display ordering. Each file contains one or more model groups:
{
"GroupName": {
"Id": "guid",
"Name": "Display Name",
"Icon": "\uE8BD",
"Order": 1,
"Models": {
"FamilyName": {
"Id": "slug",
"Name": "Family Display Name",
"Description": "...",
"DocsUrl": "https://...",
"ReadmeUrl": "https://...",
"Models": {
"VariationName": {
"Id": "guid",
"Name": "Model Name GPU",
"Url": "https://huggingface.co/org/model/tree/main/variant",
"HardwareAccelerator": "GPU",
"Size": 1234567890,
"License": "mit",
"PromptTemplate": "Phi3"
}
}
}
}
}
}
Key Fields
- Individual Model (required):
Id(GUID),Url,HardwareAccelerator,License - Language Models: have
PromptTemplatereferencingpromptTemplates.json - HardwareAccelerator values:
"CPU","GPU","NPU", or array
apis.json - Windows AI APIs
Located at Definitions/WcrApis/apis.json:
{
"WCRAPIs": {
"Id": "guid",
"Name": "Windows AI APIs",
"Icon": "\uF4A5",
"Apis": {
"ApiName": {
"Id": "guid",
"Name": "API Display Name",
"Description": "...",
"Icon": "icon.svg",
"IconGlyph": "\uE8F2",
"ReadmeUrl": "https://...",
"License": "ms-pl",
"Category": "Category Name"
}
}
}
}
Code Review Checks
- JSON structure matches expected schema
- All GUIDs are unique across all definition files
HardwareAcceleratormatches model requirements- Language models have valid
PromptTemplate - JSON is valid (no trailing commas, proper escaping)
- Icons reference existing files in
Assets/ModelIcons/
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.
- 2d ago First seen · 83 lines · 544 tokens per session scan A b370571a6b3a
ai-dev-gallery adding-model-definitions.instructions.md is an instructions file published in the GitHub repository microsoft/ai-dev-gallery (1,498 stars, last pushed 12d ago), licensed MIT. It adds 544 tokens to every session, about $0.0027 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.
Other instructions, from other repositories
maui uitests.instructions.md
Instructions for dotnet/maui, covering ui testing guidelines for .net maui, ui test structure, two-project requirement, base class and infrastructure and naming conventions.
maui ci-copilot-pipeline-security.instructions.md
Security rules for the Copilot PR-review pipeline. Read before editing.
pydantic-ai AGENTS.md
Instructions for pydantic/pydantic-ai, covering your primary responsibility is to the project and its users, gathering context on the task, ensuring the task is ready for implementation, philosophy and requirements of all contributions.
maui performance-hotpaths.instructions.md
Instructions for dotnet/maui, covering performance-critical path rules, hot paths in maui, allocation avoidance, caching and invalidation and collection iteration.
maui collectionview-windows.instructions.md
Instructions for dotnet/maui, covering collectionview — windows (items/ handler), winui listview/itemsrepeater patterns, data source and change notifications, layout configuration and cross-platform consistency.
codex-provider-sync AGENTS.md
Instructions for Dailin521/codex-provider-sync, covering ai / agent operator guide, vnext architecture baseline, goal, choose the interface and safe operating flow.