model-mondays: Instructions file for Codex

AGENTS.md

model-mondays AGENTS.md is an instructions file for Codex, OpenCode from microsoft/model-mondays. It costs 1,008 tokens per session, scanned A, original, MIT.

Repository-specific instructions for contributors and coding agents working on Microsoft's Model Mondays project, an educational livestream and resource repository about AI models and Microsoft Foundry.

In plain words
What is it for?
Use them when editing episode data, speaker profiles, topics, resources, documentation, or other Model Mondays content.
Why use it?
They explain the repository's purpose, file organization, naming conventions, and project guidance in one place.

Instructions file for CodexOpenCode ✓ vendor

Written for Codex and OpenCode: the file is AGENTS.md.

This is microsoft/model-mondays's own configuration. It tells Codex and OpenCode how to work on model-mondays 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 model-mondays configures →

About the project

Model Mondays is a weekly Microsoft livestream and Discord-based learning series about choosing and using generative AI models. Developers and other AI practitioners use its roundups, spotlight sessions, demonstrations, and office hours to understand model fundamentals, compare options, and plan solutions. The catalogue contains an instruction related to the series.

microsoft/model-mondays · 306 stars · on GitHub · microsoft.github.io

Reuse

Borrowing it

Nothing to install: this file belongs to microsoft/model-mondays. 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/microsoft/model-mondays/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/microsoft/model-mondays

Made for: Codex, OpenCode.

Wrote this? Show the measurements

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Per session 1,008 This file is loaded in full into every session.
When invoked 1,008 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 $0.01008 $0.01008
Opus 5.5 $0.00403 $0.00403
Sonnet 5.5 $0.00202 $0.00202
Haiku 4.5 $0.00101 $0.00101

Measured 7d ago against content hash 94803c1fd8fd, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

model-mondays AGENTS.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 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.md · 112 lines

How it starts

The opening of the file, as written. The whole thing — 112 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Model Mondays Agent Guide

Repository purpose

This repository publishes Model Mondays livestream episodes and Foundry Friday on-demand AMAs about AI models, Microsoft Foundry, and agent development.

Canonical structure

  • data/seasons.json: season metadata.
  • data/livestreams.json: Model Mondays episode metadata.
  • data/amas.json: independently numbered Foundry Friday AMA metadata.
  • data/speakers.json, data/topics.json, data/resources.json: shared metadata.
  • docs/model-mondays/: episode pages.
  • docs/foundry-fridays/: AMA pages and the canonical AMA index.
  • docs/assets/model-mondays/: episode banners.
  • docs/assets/foundry-fridays/: AMA banners.
  • .2025/: historical source archive; do not add current content here.

Checked-in JSON and published Markdown must agree. docs/assets/ is the canonical public asset tree.

Naming conventions

Model Mondays

  • Page: YYYY-MM-DD-sNN-eNN.md
  • Banner: S<season>-E<episode>.png
  • Example: 2026-09-28-s04-e07.md and S4-E7.png

Foundry Friday AMAs

Foundry Fridays is an on-demand initiative, not a season-driven weekly series.

  • ID: ama-NNN
  • Display number: AMA #NNN
  • Page: YYYY-MM-DD-ama-NNN.md
  • Banner: AMA-NNN.png
  • Example: 2026-09-25-ama-049.md and AMA-049.png

AMA numbers are global, unique, and sequential. An AMA may optionally link to a related episode, but no relationship is required.

Current program state

  • Season 1: 8 episodes, completed.
  • Season 2: 13 episodes, completed.
  • Season 3: 17 episodes, completed.
  • Season 4: 12 episodes, August 10-November 9, 2026, active.
  • Foundry Fridays: 49 numbered entries through AMA #049.

Season 4 is titled Model Spotlights for Agent Builders.

Content rules

  1. Use supplied, approved source material only. Never invent dates, speakers, biographies, links, resources, or event details.
  2. Omit unavailable optional sections instead of publishing TBA, placeholder links, or template prose.
  3. For Season 4, final banners are authoritative for date, title, host, and displayed guests.
  4. Use relative links for repository content and images.
  5. Use “Microsoft Foundry” in prose. Existing URL paths containing azure/ai-foundry remain valid.
  6. Keep episode and AMA pages concise when only core metadata is available.
  7. Update the corresponding JSON record, public index, and statistics whenever content is added or renamed.
  8. Preserve historical content unless a migration explicitly calls for a clean break.

Read the full file on GitHub · 112 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 Changed 94803c1fd8fd
  2. 1mo ago Changed · -291 lines · -2,377 tokens per session 8f65e0866e0e
  3. 2mo ago First seen · 403 lines · 3,385 tokens per session scan A ac9954ccae0b

Subscribe to this mod's changes

model-mondays AGENTS.md is an instructions file published in the GitHub repository microsoft/model-mondays (306 stars, last pushed 2d ago), licensed MIT. It adds 1,008 tokens to every session, about $0.0040 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.

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