Knowledge Graph Agent Skill

Knowledge graph integration for token-efficient codebase understanding. Uses codebase-memory MCP for AST indexing, dependency graphs, and smart context selection. 6-71x token savings vs raw file reading.

743 tokens

context cost

the whole folder, loaded on every use

files

instructions only

copies elsewhere

how many repositories repackaged it

521

stars on the repo

on the repository, not the skill itself

Install

one command, takes just this skill from the repository

npx skills add https://github.com/vibeeval/vibecosystem --skill knowledge-graph

The instruction itself

17 sections, as written by the author

Knowledge Graph Integration

Overview

Transform any codebase into a queryable knowledge graph using codebase-memory MCP server. Instead of reading entire files, query the graph for exactly the context you need.

Token savings: 6-71x reduction compared to raw file reading.

Setup

Prerequisites

codebase-memory MCP server installed (~/bin/codebase-memory-mcp or via npm)
MCP config in ~/.mcp.json:

{
  "mcpServers": {
    "codebase-memory": {
      "command": "/path/to/codebase-memory-mcp",
      "args": []
    }
  }
}

Core Operations

1. Index a Repository

mcp__codebase-memory__index_repository
  project_name: "my-project"
  repo_path: "/path/to/repo"

First index takes 30-120s depending on repo size. Subsequent updates are incremental.

2. Check Index Status

mcp__codebase-memory__index_status
  project_name: "my-project"

3. Search Code

mcp__codebase-memory__search_code
  project_name: "my-project"
  query: "authentication middleware"

Returns relevant code snippets without reading entire files.

4. Get Architecture Overview

mcp__codebase-memory__get_architecture
  project_name: "my-project"

Returns high-level architecture: modules, dependencies, entry points.

5. Trace Call Paths

mcp__codebase-memory__trace_call_path
  project_name: "my-project"
  from_symbol: "handleLogin"
  to_symbol: "validateToken"

6. Query Dependency Graph

mcp__codebase-memory__query_graph
  project_name: "my-project"
  query: "what depends on auth module?"

When to Use

| Scenario | Without Graph | With Graph |

|----------|--------------|------------|

| Code review | Read all changed files + imports | Query impact of changes |

| Bug investigation | Read 10-20 files manually | Trace call path to bug |

| Refactoring | Read entire module | Query all dependents |

| Architecture review | Read project top-down | Get architecture overview |

Integration with Agents

code-reviewer

Before reviewing, query the graph for the blast radius of changes:

search_code("functions that call {changed_function}")

architect

Get architecture overview before proposing changes:

get_architecture("project")

sleuth

Trace call paths to understand bug propagation:

trace_call_path("buggy_function", "entry_point")

Token Savings Examples

|-----------|-----------|-------------|---------|

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How to use it

Copy the folder

Take vibeeval/knowledge-graph from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.