Nexus-skills — Installieren & Live-Demo

Warum nutzen

Hauptfunktionen

Persistent .nexus-map/ knowledge base per repo
File structure, dependency graph, import + call-site tracking
Change-impact radius queries
Incremental updates — re-run only on changed files
Tool-calling LLMs consume the map to answer precise questions
Works with Copilot, Cursor, Claude Code, and generic agents

Live-Demo

In der Praxis

nexus-skill.replay ▶ bereit

0/0

Installation

Repository des Autors · Offizielle Dokumentation zu Claude Skills

Anwendungsfälle

Praxisnahe Nutzung: Nexus-skills

How to onboard to an unfamiliar codebase fast

👤 Engineers joining a new team or team inheriting a codebase ⏱ ~60 min intermediate

Wann einsetzen: Day one in a repo you've never seen; you want a map before making changes.

Ablauf

Build the map

Use nexus-skills to scan this repo and build .nexus-map/.✓ Kopiert

→ Progress output + map files produced
Get the tour

Using .nexus-map, tell me: entry points, top 10 most-imported modules, and any orphaned files.✓ Kopiert

→ Repo overview keyed to actual files
Dig into a subsystem

Show me the payments subsystem — files, dependencies, external calls.✓ Kopiert

→ Scoped subsystem view

Ergebnis: A factual mental model of the repo built in under an hour.

Fallstricke

Map goes stale after big merges — Re-run nexus update; it's incremental

Check blast radius before changing a core function

👤 Engineers about to touch a widely-used utility ⏱ ~30 min intermediate

Wann einsetzen: You're about to rename or change the signature of a function and want to see every call site.

Voraussetzungen

.nexus-map/ already built — Run once per repo; incremental after

Ablauf

Query impact

What calls formatCurrency(), and what would break if I change the signature to accept a locale?✓ Kopiert

→ Call-site list with each caller's likely break mode
Generate migration

Produce the minimal diff across all call sites to add the new locale param with a sensible default.✓ Kopiert

→ Multi-file patch

Ergebnis: A change with known blast radius and a prepared diff.

Find dead code and unused exports

👤 Engineers cleaning up before a refactor ⏱ ~40 min intermediate

Wann einsetzen: Before a refactor you want to know what's truly unused.

Ablauf

Query map

Using .nexus-map, list files with no imports from elsewhere, and exports with no external references.✓ Kopiert

→ Ranked list with confidence per finding
Verify

For the top 10 candidates, double-check by searching for string-based usage (reflection, dynamic imports).✓ Kopiert

→ Filtered list with false-positive caveats

Ergebnis: A dead-code delete list you can actually ship.

Fallstricke

Dynamic imports look dead statically — Always run the string-based sweep before deleting

Kombinationen

Mit anderen MCPs für 10-fache Wirkung

nexus-skill + claude-code-owasp-skill

Security-impact queries: where does tainted input flow?

Using nexus-map, trace every call path from the /ingest endpoint into the DB layer. Then OWASP review those paths.✓ Kopiert

Werkzeuge

Was dieses MCP bereitstellt

Werkzeug	Eingaben	Wann aufrufen	Kosten
build_map	repo_root	Once per repo initially	compute (local)
update_map	changed_files	After large merges	compute (local)
query_structure	question	Answering structure questions	Claude tokens
change_impact	symbol or file	Before breaking changes	Claude tokens
dead_code	-	Pre-refactor cleanup	Claude tokens

Kosten & Limits

Was der Betrieb kostet

API-Kontingent: None
Tokens pro Aufruf: Map build is local compute (fast); queries consume Claude tokens
Kosten in €: Free
Tipp: Build once, query often. Re-build only when repo shape changes materially.

Sicherheit

Rechte, Secrets, Reichweite

Credential-Speicherung: No credentials. .nexus-map/ is local by default.

Datenabfluss: Map building is local. Querying sends map snippets to Claude.

Add .nexus-map/ to .gitignore unless your team agrees to share it — it's a detailed map of the codebase.

Fehlerbehebung

Häufige Fehler und Lösungen

Map build crashes on monorepos

Run per-package rather than on the root; nexus supports a scope flag

Queries return stale results after edits

Run nexus update on the changed files; incremental is cheap

Language not recognized

Check supported languages in nexus docs; some frameworks need explicit parser config

Alternativen

Nexus-skills vs. andere

Alternative	Wann stattdessen	Kompromiss
SourceGraph / Cody	You need hosted code intelligence at org scale	Paid; not local
tree-sitter + custom queries	You want full control	Much more build time

Mehr

Ressourcen

📖 Offizielle README auf GitHub lesen

🐙 Offene Issues ansehen

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