Minimizing Ty Ecosystem Changes
astral-sh/ruff
A skill your agent uses when a user says "minimize this ty ecosystem change", "reproduce this ecosystem result", "investigate a primer difference", "investigate a mypyprimer difference"…
Finds code that compiles, lints clean and is referenced, but that nothing can actually reach — dead islands whose items reference each other while the outermost edge points at a route, command, or…
Install Unreachable Subsystems
$ npx skills add calimero-network/core --skill unreachable-subsystems -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install calimero-network/core unreachable-subsystems --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/calimero-network/core.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.cursor/skills/unreachable-subsystems .claude/skills/unreachable-subsystems && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "unreachable-subsystems" agent skill from https://github.com/calimero-network/core/tree/master/.cursor/skills/unreachable-subsystems into .claude/skills/unreachable-subsystems/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "unreachable-subsystems", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/calimero-network/core/tree/master/.cursor/skills/unreachable-subsystemsType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add calimero-network/core --skill unreachable-subsystems -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install calimero-network/core unreachable-subsystems --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/calimero-network/core.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.cursor/skills/unreachable-subsystems .agents/skills/unreachable-subsystems && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "unreachable-subsystems" agent skill from https://github.com/calimero-network/core/tree/master/.cursor/skills/unreachable-subsystems into .agents/skills/unreachable-subsystems/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "unreachable-subsystems", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add calimero-network/core --skill unreachable-subsystems -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install calimero-network/core unreachable-subsystems --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/calimero-network/core.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.cursor/skills/unreachable-subsystems .cursor/skills/unreachable-subsystems && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "unreachable-subsystems" agent skill from https://github.com/calimero-network/core/tree/master/.cursor/skills/unreachable-subsystems into .cursor/skills/unreachable-subsystems/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "unreachable-subsystems", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/calimero-network/core.git --path .cursor/skills/unreachable-subsystems--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add calimero-network/core --skill unreachable-subsystems -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install calimero-network/core unreachable-subsystems --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/calimero-network/core.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.cursor/skills/unreachable-subsystems .gemini/skills/unreachable-subsystems && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "unreachable-subsystems" agent skill from https://github.com/calimero-network/core/tree/master/.cursor/skills/unreachable-subsystems into .gemini/skills/unreachable-subsystems/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "unreachable-subsystems", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install calimero-network/core unreachable-subsystemsInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add calimero-network/core --skill unreachable-subsystems -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/calimero-network/core.git skills-src && mkdir -p .github/skills && cp -r skills-src/.cursor/skills/unreachable-subsystems .github/skills/unreachable-subsystems && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "unreachable-subsystems" agent skill from https://github.com/calimero-network/core/tree/master/.cursor/skills/unreachable-subsystems into .github/skills/unreachable-subsystems/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "unreachable-subsystems", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add calimero-network/core --skill unreachable-subsystems -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install calimero-network/core unreachable-subsystems --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/calimero-network/core.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.cursor/skills/unreachable-subsystems .opencode/skills/unreachable-subsystems && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "unreachable-subsystems" agent skill from https://github.com/calimero-network/core/tree/master/.cursor/skills/unreachable-subsystems into .opencode/skills/unreachable-subsystems/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "unreachable-subsystems", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
unreachable-subsystems- GitHub stars
- 171
- Token cost
- ~1.9k tokens
- SKILL.md length
- 1,029 words
- Files
- 1
- Skills in repo
- 4
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Finds code that compiles, lints clean and is referenced, but that nothing can actually reach — dead islands whose items reference each other while the outermost edge points at a route, command, or…
- Works in 6 steps: Response/request types in… → calimero-client methods whose URL string… → meroctl/merod subcommands whose client… → …
- Auditing for vestigial subsystems
- SKILL.md covers The thing you are hunting, Anchors in this repo, Worked example — the one that… and Where to look first, plus 3 more sections
- Calls cargo
What it does
Unreachable Subsystems is an agent skill from calimero-network/core. Finds code that compiles, lints clean and is referenced, but that nothing can actually reach — dead islands whose items reference each other while the outermost edge points at a route, command, or registration that does not exist. Use when auditing for vestigial subsystems, superseded models left in place, endpoints with no server route, CLI commands that 404, or scenario files registered in no CI matrix. Complements dead-code-cleanup, which handles compiler-visible orphans.
Its SKILL.md is about 1.9k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Development, covering Linting and formatting. The repository describes itself as: Calimero - Peer-to-peer application platform with local-first governance, CRDT state sync, and WASM execution.
When your agent uses it
- Auditing for vestigial subsystems
- Superseded models left in place
- Endpoints with no server route
- CLI commands that 404
Example prompts
- “Use the unreachable-subsystems skill to find code that compiles, lints clean and is referenced, but that nothing can actually reach — dead islands…”
- “/unreachable-subsystems”
Workflow steps
6 steps, taken from the first numbered list in SKILL.md.
- Response/request types in crates/server/primitives/src/admin/mod.rs with
- calimero-client methods whose URL string does not appear server-side.
- meroctl/merod subcommands whose client call is one of the above.
- merobox scenario files not registered in any .github/workflows/*.yml
- Types superseded by a newer model where the old one was left in place
- Feature-gated code where the feature is enabled nowhere.
What it can do on your machine
Read from SKILL.md and the folder at commit 64f9209. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
cargo
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Unreachable Subsystems loads about 1.9k tokens when it runs. Until then it costs about 126 tokens; SKILL.md has 1,029 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 1,029 words (~1,922 tokens).
“Find code that compiles, lints clean, and is referenced — but that nothing can actually reach. Not unused imports or orphan functions: the compiler already catches those, and the dead-code-cleanup skill already covers them. You are looking for the class…”
- name
- unreachable-subsystems
Files
Just SKILL.md in .cursor/skills/unreachable-subsystems of calimero-network/core.
Open the folder on GitHubat commit 64f9209
Compare with similar skills
Unreachable Subsystems next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Unreachable Subsystems this skillcalimero-network/core | 171 | — | ~1.9k | Automated safety check: Pass | Custom licence | |
| Minimizing Ty Ecosystem Changesastral-sh/ruff | 50k | — | ~4.6k | Automated safety check: Pass | MIT | |
| Install Anti-Slop Oxlint Rulesdmmulroy/anti-slop | 5.4k | — | ~2.2k | Automated safety check: Pass | MIT | |
| Babysit PR To Pass CIsgl-project/sglang | 37k | 2 repos | ~3k | Automated safety check: Pass | Apache-2.0 | |
| Rust Best Practicesfarm-fe/farm | 5.6k | 3 repos | ~1.1k | Automated safety check: Pass | MIT | |
| Summarise Ecosystem Resultsastral-sh/ruff | 50k | — | ~2.2k | Automated safety check: Pass | MIT |
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Related
Categories
Questions about Unreachable Subsystems
What does Unreachable Subsystems do?
Finds code that compiles, lints clean and is referenced, but that nothing can actually reach — dead islands whose items reference each other while the outermost edge points at a route, command, or…. Unreachable Subsystems is an agent skill from calimero-network/core. Finds code that compiles, lints clean and is referenced, but that nothing can actually reach — dead islands whose items reference each other while the outermost edge points at a route, command, or registration that does not exist.
When should I use Unreachable Subsystems?
Unreachable Subsystems fits situations like: auditing for vestigial subsystems; superseded models left in place; endpoints with no server route; CLI commands that 404.
How do I install Unreachable Subsystems in Claude Code?
Run `npx skills add calimero-network/core --skill unreachable-subsystems -a claude-code`. Or copy the skill folder (.cursor/skills/unreachable-subsystems in calimero-network/core) into .claude/skills/unreachable-subsystems in your project. Claude Code loads it when a task matches its description.
How do I install Unreachable Subsystems in Codex?
Run `npx skills add calimero-network/core --skill unreachable-subsystems -a codex`. Or copy the skill folder (.cursor/skills/unreachable-subsystems in calimero-network/core) into .agents/skills/unreachable-subsystems in your project. Codex loads it when a task matches its description.
Can I use Unreachable Subsystems in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add calimero-network/core --skill unreachable-subsystems -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/unreachable-subsystems, .gemini/skills/unreachable-subsystems, .github/skills/unreachable-subsystems and .opencode/skills/unreachable-subsystems in your project.
What does Unreachable Subsystems need to run?
Going by SKILL.md and its folder, Unreachable Subsystems needs the command-line tools its instructions call (cargo).
Does Unreachable Subsystems access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Unreachable Subsystems safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Unreachable Subsystems use?
Unreachable Subsystems has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Unreachable Subsystems use?
About 1.9k tokens (SKILL.md is roughly 7.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Unreachable Subsystems?
Skills that share tags, products or a category with Unreachable Subsystems: Minimizing Ty Ecosystem Changes (astral-sh/ruff, 50k stars), Install Anti-Slop Oxlint Rules (dmmulroy/anti-slop, 5.4k stars), Babysit PR To Pass CI (sgl-project/sglang, 37k stars) and Rust Best Practices (farm-fe/farm, 5.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Unreachable Subsystems?
calimero-network (a GitHub organization) maintains it in calimero-network/core, which has 171 GitHub stars. The repository holds 4 skills in this directory. The repository was last updated on October 9, 2026.
Source: calimero-network/core on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.