classic-doom SKILL.md skillA
classic-doom from razzant/ouroboroshub is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add razzant/ouroboroshub/classic-doom@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- razzant/ouroboroshub
- Path
skills/classic-doom/SKILL.md- Versions recorded
- 2
- Latest version
- v1.0.0, committed Sep 1, 2026
- First version recorded
- Aug 25, 2026
- Size
- 2,608 bytes
- Repository stars
- 10
- License
- none declared
Fully playable Classic Doom (1993) standalone 2.5D FPS raycaster extension widget with textured walls, procedural sprite enemies, authentic weapons, levels, HUD, Web Audio sound and heavy metal music synthesizer.
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
# Classic Doom (1993) Extension Widget An authentic, fully self-contained, high-performance 2.5D raycaster FPS game engine modeled after the legendary 1993 id Software classic, running directly inside an Ouroboros extension widget. ## Features - **2.5D Raycaster Engine**: Depth-shaded textured walls, variable lighting, diminishing light colormaps, animated doors, and scanline rendering with zero external CDNs. - **Authentic Weapons**: Fist, Pistol, Shotgun, Chaingun, and Plasma Gun with firing animations, recoil, muzzle flashes, and ammo management. - **Classic Monsters**: Zombieman, Shotgun Guy, Imp (fireballs), Demon (Pinky charge), and Boss encounter (Cyberdemon / Baron). - **Multiple Atmospheric Maps**: - E1M1: Hangar (Zigzag corridor, courtyard window, nukage pool, exit chamber) - E1M2: Nuclear Plant (Tech maze, computer terminals, keycard doors, ambushes) - E1M8: Phobos Anomaly (Hellish arena, pentagram floor, boss battle, victory teleporter) - **100% Procedural Audio & Music**: Web Audio API sound effects (gunfire, monster grunts, doors, pickups) + synthesized heavy metal background tracks without any external files. …
Read the whole file at its exact version.
How to install
mdr add razzant/ouroboroshub/classic-doom@sha256:96ccc5085d6f80c1The line at the top of this page pins the label v1.0.0, 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_vljbmuh5m2pwt3xd)
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Versions
The registry has recorded 2 versions of this file, between Aug 25, 2026 and Sep 1, 2026, about one every 7 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.0.0 latest | 2026-09-01 | 5da2dae | 2,608 B | A | view · diff |
| v1.0.0 | 2026-08-25 | dba1e70 | 2,590 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (2608 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
razzant/ouroboroshub · 10 stars · license none declared · pushed 2026-10-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_vljbmuh5m2pwt3xd GET https://markdownregistry.com/api/v1/resolve?ref=razzant/ouroboroshub/classic-doom GET https://markdownregistry.com/api/v1/blob/96ccc5085d6f80c15ac87a9c214756a37900dde0ac0126cb206af731cbecfdcd
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: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.