Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add Zfinix/aster --skill lsp-navigationgit clone --depth 1 https://github.com/Zfinix/asterWrote 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/zfinix/aster/lsp-navigation)<a href="https://agentmods.dev/skills/zfinix/aster/lsp-navigation"><img src="https://agentmods.dev/badge/skills/zfinix/aster/lsp-navigation/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/zfinix/aster/lsp-navigation"><img src="https://agentmods.dev/badge/skills/zfinix/aster/lsp-navigation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00053 | $0.00384 |
| Opus 5.5 | $0.00021 | $0.00154 |
| Sonnet 5.5 | $0.00011 | $0.00077 |
| Haiku 4.5 | $0.00005 | $0.00038 |
Grade A, and why
lsp-navigation 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.
What it actually says
LSP navigation
- lsp_diagnostics beats a full build for "did my edit compile". After
editing a file, one diagnostics call answers it in milliseconds. A full
cargo checkortscrun is for the end of a task, not every edit. - lsp_references finds real usages. Text search finds the name in comments, strings, and unrelated scopes; references finds call sites. Use it before renaming or deleting anything. It takes a file plus a position, so search for the symbol first, then pass the position of one hit.
- lsp_definitions jumps to the source. Use it when a call site's types are unclear and you need the signature, instead of guessing the file path and reading it.
- Line and character are zero-based. The positions come from the file itself; if you just read the file, the line you saw is already the right number minus one.
- The first call in a language is slow. The server starts and indexes on first use; rust-analyzer can take seconds on a large crate. That is startup cost, not a hang. Subsequent calls in the same session reuse the running server.
- Missing servers are expected. If a tool says the language server is not installed, fall back to text search and a build; do not retry or tell the user to install anything unless they ask.
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 · 28 lines · 53 tokens per session scan A 166741dd6e3f
lsp-navigation is a skill published in the GitHub repository Zfinix/aster (132 stars, last pushed today), licensed Apache-2.0. It adds 53 tokens to every session and 384 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 2026-09-06.
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