Nexus-skills — Installer & Démo en direct

Pourquoi l'utiliser

Fonctionnalités clés

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

Démo en direct

Aperçu en pratique

nexus-skill.replay ▶ prêt

0/0

Installation

Dépôt de l’auteur · Documentation officielle des Skills Claude

Cas d'usage

Usages concrets : Nexus-skills

How to onboard to an unfamiliar codebase fast

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

Quand l'utiliser : Day one in a repo you've never seen; you want a map before making changes.

Déroulement

Build the map

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

→ Progress output + map files produced
Get the tour

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

→ Repo overview keyed to actual files
Dig into a subsystem

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

→ Scoped subsystem view

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

Pièges

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

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

Prérequis

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

Déroulement

Query impact

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

→ 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.✓ Copié

→ Multi-file patch

Résultat : 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

Quand l'utiliser : Before a refactor you want to know what's truly unused.

Déroulement

Query map

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

→ Ranked list with confidence per finding
Verify

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

→ Filtered list with false-positive caveats

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

Pièges

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

Combinaisons

Associez-le à d'autres MCPs pour un effet X10

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.✓ Copié

Outils

Ce que ce MCP expose

Outil	Entrées	Quand appeler	Coût
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

Coût et limites

Coût d'exécution

Quota d'API: None
Tokens par appel: Map build is local compute (fast); queries consume Claude tokens
Monétaire: Free
Astuce: Build once, query often. Re-build only when repo shape changes materially.

Sécurité

Permissions, secrets, portée

Stockage des identifiants : No credentials. .nexus-map/ is local by default.

Sortie de données : 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.

Dépannage

Erreurs courantes et correctifs

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

Alternatives

Nexus-skills vs autres

Alternative	Quand l'utiliser	Compromis
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

Plus

Ressources

📖 Lire le README officiel sur GitHub

🐙 Voir les issues ouvertes

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