terra-nil-debuggee SKILL.md skillA
terra-nil-debuggee from citiesskylinesmodding/agents-plugins is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add citiesskylinesmodding/agents-plugins/terra-nil-debuggee@git:20261026.a69ba83Pins git:20261026.a69ba83 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- citiesskylinesmodding/agents-plugins
- Path
.agents/skills/terra-nil-debuggee/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261026.a69ba83, committed Oct 26, 2026
- Size
- 1,727 bytes
- Repository stars
- 8
- License
- MIT
Launches Terra Nil, a Unity game from this machine's Steam library, as a second debuggee for the unity MCP server. Use when a unity-devtools change needs a live game and Cities Skylines II is unavailable or too slow to launch, or when a report comes from a release Mono build (BepInEx, Doorstop, a game that is not CS2) and the fixture cannot reproduce its shape.
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
# Terra Nil as a debuggee A release Mono player on native Linux, its debugger agent enabled by Doorstop: the shape games of the BepInEx community run under, and the one CS2 under Proton is not. ## 1. Launch Run `.agents/skills/terra-nil-debuggee/launch.sh [port]` (default port 56000). Done when it prints the port it listens on; the game's output is in the path it names. The game runs outside Steam, so its Steam API init fails in the log and it carries on to the menu. Launching is acting on the user's machine: ask first unless they already said to. ## 2. Attach A release build advertises no beacon, so `status` shows none: call `attach` with the port, and again after any drop, since a reattach goes back to the beacon. ## 3. What differs from CS2 - No Entities world: the `ecs_*` tools and `em`/`world` roots have nothing to answer. `eval` on `UnityEngine.*` and the game's own types works. - No debug symbols: a breakpoint takes a method, never a line, and frames show no source positions. - The main thread is unnamed and several unnamed workers sit beside it; a game-named main thread is the fixture's shape, not this one. ## 4. Stop …
Read the whole file at its exact version.
How to install
mdr add citiesskylinesmodding/agents-plugins/terra-nil-debuggee@sha256:e72249dd7a1efac5The line at the top of this page pins the label git:20261026.a69ba83, 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_kdmulqykdnzcs6zd)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 26, 2026.
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 (1727 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
citiesskylinesmodding/agents-plugins · 8 stars · license MIT · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_kdmulqykdnzcs6zd GET https://markdownregistry.com/api/v1/resolve?ref=citiesskylinesmodding/agents-plugins/terra-nil-debuggee GET https://markdownregistry.com/api/v1/blob/e72249dd7a1efac5d77acaef884272736a334a398321a3c177c4c39c033d5fe3
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.