AGENTS.md@labs/engineering-playgroundA
AGENTS.md@labs/engineering-playground from phelan164/codex-howto is an AGENTS.md file: the standing instructions coding agents read in that repo.
mdr add phelan164/codex-howto/labs/engineering-playground/AGENTS.md@git:20260724.a8a7148Pins git:20260724.a8a7148 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 14 of 14 checks passed
- Kind
- AGENTS.md file
- Repository
- phelan164/codex-howto
- Path
labs/engineering-playground/AGENTS.md- Versions recorded
- 1
- Latest version
- git:20260724.a8a7148, committed Jul 24, 2026
- Size
- 786 bytes
- Repository stars
- 20
- License
- MIT
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Playground guidance ## Scope This directory is an intentionally flawed, local-only teaching fixture. ## Commands Run backend tests with: ```bash python3 -m unittest discover -s backend -p "test_*.py" ``` The frontend is one static HTML file with no build step. ## Safety - Do not deploy `infra/deployment.yaml`. - Do not access a cluster, registry, cloud account, or external service. - Treat all infrastructure commands as examples or local validation only. - Do not add third-party dependencies; the lab must remain self-contained. - Preserve a failing regression test before fixing a seeded backend defect. ## Done Report changed files, exact checks, unverified browser behavior, and residual risk. Keep unrelated seeded defects intact unless the exercise requests them.
Read the whole file at its exact version.
How to install
mdr add phelan164/codex-howto/labs/engineering-playground/AGENTS.md@sha256:6420fdaeff18e61dThe line at the top of this page pins the label git:20260724.a8a7148, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_jy34f7q422jpv6lt)
6 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jul 24, 2026.
Audit of the latest version
- pass: Size between 200 bytes and 200 KB (786 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
phelan164/codex-howto · 20 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_jy34f7q422jpv6lt GET https://markdownregistry.com/api/v1/resolve?ref=phelan164/codex-howto/labs/engineering-playground/AGENTS.md GET https://markdownregistry.com/api/v1/blob/6420fdaeff18e61df6a5a22f3ba927422dd66d3a77532f3eebe8da767e68272b
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: how to write a good AGENTS.md · AGENTS.md vs CLAUDE.md · which agent file does what.