CodeGraph for DeepSeek Harness

Production-grade, per-agent CodeGraph integration for DeepSeek Harness (DSH).

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Overview

dsh-simple-codegraph provides each DSH Agent with an isolated, project-scoped CodeGraph MCP connection. Instead of spending dozens of costly grep, glob, and read_file calls attempting to reconstruct codebase structure, agents retrieve relevant verbatim source, call hierarchies, and blast-radius impact in a single focused exploration call.

Particularly optimized for local 20B–30B models (e.g., Qwen 2.5/3.x 27B/32B, DeepSeek distillations) running in resource-constrained environments where tool schemas consume precious context, repeated file reads are slow, and unnecessary agent loops cause drift.

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Key Highlights

• 🛡️ Genuine Per-Agent Isolation: Every live agent receives its own scoped CodeGraph MCP stdio process pinned to its working directory.
• ⚡ Simultaneous Multi-Project Support: Multiple agents work in separate repositories concurrently with zero cross-project leakage.
• 🎯 One-Tool Philosophy for Small Models: Exposes only codegraph_explore by default to minimize schema token overhead and eliminate tool-selection confusion.
• 📦 Zero-Config Bundle: Installs natively via dsh plugin add with automatic upward repository root discovery (.codegraph/).
• 🔒 Compaction-Safe Architecture: Keeps CODEGRAPH_EXPLORE_DEDUP disabled so DSH context pruning does not invalidate subsequent model queries.
• ⏱️ Turn-1 Handshake Guarantee: Pre-assembles prompt tools to ensure the MCP stdio handshake completes before Turn 1 prompt dispatch.

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Quick Start

1. Prerequisites

Ensure CodeGraph CLI is installed and index your target project:

# Check installation
codegraph --version

# Index your repository (one-time setup)
cd /path/to/my-project
codegraph init

2. Install Plugin

Add the bundle to your desired DSH profile (e.g. web, coding, or default):

dsh plugin --profile web add dsh-simple-codegraph

3. Run DeepSeek Harness

Start DSH inside your indexed repository:

cd /path/to/my-project
dsh --profile web

The CodeGraph MCP server boots automatically for each agent session, attaches to the repository root, and exposes mcp__codegraph__codegraph_explore on the very first turn.

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Configuration Preview

Works out of the box with zero configuration. Optional settings can be added to your profile's cordis.patch.yml:

- id: dsh-simple-codegraph
  config:
    command: codegraph          # CodeGraph executable or path
    toolCallTimeoutMs: 60000    # Tool execution timeout (ms)
    failOnStartupError: false   # Abort agent boot if CodeGraph fails
    routingHint: true           # Inject 1-sentence prompt routing hint

For detailed options and recipes, see the Configuration Guide.

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Documentation

Explore in-depth documentation in the docs/ directory:

• 📖 Setup & Installation Guide — Detailed prerequisites, profile installations, and multi-project setup.
• ⚙️ Configuration Reference — Complete configuration schema, custom binaries, and timeouts.
• 🏗️ Architecture & Design — Process isolation model, lifecycle hooks, and small-model design principles.
• 🔄 Migration Guide — Upgrading from PR #1591 global MCP, @hyzyn/dsh-codegraph, or jiangzhenguo/dsh-codegraph.
• 🛠️ Troubleshooting Guide — Resolving PATH issues, unindexed projects, and collision warnings.

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Development & Testing

# Install dependencies
pnpm install

# Compile TypeScript
pnpm run build

# Run unit and lifecycle tests
pnpm test

# Run benchmark suite
pnpm run benchmark

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License

MIT © 2026 DeepSeek Harness Community