Borrowing it
Nothing to install: this file belongs to p1va/symbols. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/p1va/symbols/main/.agents/skills/install-language-server/SKILL.mdgit clone --depth 1 https://github.com/p1va/symbolsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/p1va/symbols/install-language-server)<a href="https://agentmods.dev/skills/p1va/symbols/install-language-server"><img src="https://agentmods.dev/badge/skills/p1va/symbols/install-language-server/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/p1va/symbols/install-language-server"><img src="https://agentmods.dev/badge/skills/p1va/symbols/install-language-server.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00040 | $0.01801 |
| Opus 5.5 | $0.00016 | $0.00720 |
| Sonnet 5.5 | $0.00008 | $0.00360 |
| Haiku 4.5 | $0.00004 | $0.00180 |
Grade A, and why
install-language-server scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 114 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Install Language Server
Context
language-servers is an MCP bridge to one or more Language Server Protocol servers. The MCP does not contain TypeScript, Pyright, Rust, or Roslyn itself. Instead it reads the active config file reported by language-servers://profiles. Each entry under language-servers: declares one profile: how to launch the server, which file extensions it handles, which workspace markers it expects, and any preload or environment settings.
When an MCP tool like outline, inspect, references, rename, completion, or diagnostics is called on a matching file, the MCP chooses the matching profile, starts that language server over stdio if needed, and proxies the request.
This skill is for the part the MCP will not do automatically:
- make sure the
language-serversMCP server is available in this session - find or bootstrap the active config file
- install or verify the target language server binary
- add or update one profile in that YAML file
- run
reloadso the MCP rereads the YAML - validate that a real file now routes to the right spawned language server
Use this skill for both setup and troubleshooting:
- Setup: bootstrap config if needed, add a new profile, reload, and validate.
- Troubleshooting: inspect the existing profile and logs first, verify the binary and routing on a real file, and only edit YAML if the evidence points to a config problem.
Use language-servers://profiles as the source of truth:
- it proves the MCP server is connected
manager.configPathtells you which YAML file is activemanager.statetells you whether config exists or setup is stilluninitializedprofilesshows the declared profiles from YAML with runtime state overlaid on toplanguage-servers://profiles/{name}andlanguage-servers://profiles/{name}/logsshow per-profile details and logs
If language-servers://profiles is unavailable, stop and say that the language-servers MCP server is not connected in this session. Do not guess config state without the resource.
What ships with it
14 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- agents/openai.yaml 281 B
- assets/ServerDownload.csproj 1.5 KB
- references/clangd.md 1.6 KB
- references/gopls.md 1.0 KB
- references/jdtls.md 2.7 KB
- references/kotlin.md 1.9 KB
- references/lua.md 1.1 KB
- references/php.md 1.1 KB
- references/pyright.md 2.3 KB
- references/roslyn.md 2.8 KB
- references/ruby.md 1.2 KB
- references/rust.md 1.1 KB
- references/swift.md 1.0 KB
- references/typescript.md 4.0 KB
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 114 lines · 40 tokens per session scan A 2f31362b4578
install-language-server is a skill published in the GitHub repository p1va/symbols (5 stars, last pushed 3mo ago), licensed MIT. It adds 40 tokens to every session and 1,801 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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