gitnexus-guide

A guide to GitNexus, a code knowledge graph that maps symbols, references and execution flows in a repository. It lists the tools and workflows for understanding, debugging, refactoring and impact analysis.

In plain words
What is it for?
Use it to explore architecture, trace bugs, estimate what a change may affect, plan refactors and query the repository graph.
Why use it?
It helps an agent find how code is connected before changing it and warns when the repository index needs updating.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/tabularisdb/tabularis/gitnexus-guide
Any agent
npx skills add TabularisDB/tabularis --skill gitnexus-guide
Clone the repo
git clone --depth 1 https://github.com/TabularisDB/tabularis

Made for: Claude Code, Codex.

Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,518 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00056 $0.02518
Opus 5 $0.00028 $0.01259
Sonnet 5 $0.00011 $0.00504
Haiku 4.5 $0.00006 $0.00252

Measured yesterday against content hash 746d057790de, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

gitnexus-guide 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 yesterday.

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.

Origin

Copies of this mod

8 near-identical copies found in the catalogue:

.claude/skills/gitnexus/gitnexus-guide/SKILL.md · 139 lines

How it starts

The opening of the file, as written. The whole thing — 139 lines — stays where its author put it; the contents beside it link to each section on GitHub.

GitNexus Guide

Quick reference for all GitNexus MCP tools, resources, and the knowledge graph schema.

Always Start Here

For any task involving code understanding, debugging, impact analysis, or refactoring:

  1. Read gitnexus://repo/{name}/context — codebase overview + check index freshness
  2. Match your task to a skill below and read that skill file
  3. Follow the skill's workflow and checklist

If step 1 warns the index is stale, run node .gitnexus/run.cjs analyze in the terminal first.

Skills

Task Skill to read
Understand architecture / "How does X work?" gitnexus-exploring
Blast radius / "What breaks if I change X?" gitnexus-impact-analysis
Trace bugs / "Why is X failing?" gitnexus-debugging
Rename / extract / split / refactor gitnexus-refactoring
Tools, resources, schema reference gitnexus-guide (this file)
Index, status, clean, wiki CLI commands gitnexus-cli

Tools Reference

Tool What it gives you
query Process-grouped code intelligence — execution flows related to a concept
context 360-degree symbol view — categorized refs, processes it participates in
impact Symbol blast radius — what breaks at depth 1/2/3 with confidence
trace Shortest path between two symbols — "how does A reach B?" in one call
detect_changes Git-diff impact — what do your current changes affect
rename Multi-file coordinated rename with confidence-tagged edits
cypher Raw graph queries (read gitnexus://repo/{name}/schema first)
explain Persisted taint findings — source→sink data flows (needs analyze --pdg)
pdg_query Control/data dependence — what gates X (CDG) / where Y flows (REACHING_DEF); needs analyze --pdg
check Check graph invariants such as circular imports
route_map API route map — which components/hooks fetch which endpoints, and the handler files that serve them
shape_check Response-shape drift — keys each route returns vs keys its consumers access (flags MISMATCH)
api_impact Pre-change report for an API route — consumers, middleware, shape mismatches, risk level
tool_map MCP/RPC tool definitions and the files that handle them
group_list List configured multi-repo groups, or one group's config
group_sync Rebuild a group's Contract Registry (cross-repo HTTP contract links); run after group.yaml changes or member re-index
list_repos Discover indexed repos (paginated — limit/offset)

Read the full file on GitHub · 139 lines

Changes

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.

  1. yesterday First seen · 139 lines · 56 tokens per session scan A 746d057790de

Subscribe to this mod's changes

gitnexus-guide is a skill published in the GitHub repository TabularisDB/tabularis (4,583 stars, last pushed today), licensed Apache-2.0. It adds 56 tokens to every session and 2,518 once invoked, about $0.0003 per session on Opus 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 2026-08-30.

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