AGENTS.md@labs/engineering-playground agentsA
AGENTS.md@labs/engineering-playground is agent-read markdown (agents) from phelan164/codex-howto.
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns 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@git:20260724.a8a7148mdr add phelan164/codex-howto/labs/engineering-playground/AGENTS.md@sha256:6420fdaeff18e61dPin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_jy34f7q422jpv6lt)
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Versions
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 · 9 stars · license MIT · pushed 2026-09-21 · 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 agent 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.