dsh-tool-ast-grep

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AST-based structural code search and outline plugin for DeepSeek Harness (DSH), powered by ast-grep.

Provides structural code searching and outline inspection capabilities for coding agents, dramatically outperforming traditional regular expression search (grep) in token efficiency and semantic accuracy.

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Features

• ast_search: Search code structures using AST patterns and meta-variables ($NAME, $$$).
  • Finds structural patterns across multiple lines regardless of formatting or whitespace.
  • Supports node kind queries (e.g. function_declaration, interface_declaration, class_declaration).
  • Supports strictness modes (smart, relaxed, ast, cst).
  • Supports file path and glob filtering.
• ast_outline: Extract an ultra-compact structural outline (functions, classes, types, interfaces, exports) from a source file.
  • Saves 80%–95% tokens compared to reading the entire file.
  • Supports depth control (top-level vs. nested methods).
• Zero Shell Quoting Issues: Invoked safely via child processes with JSON streaming — immune to Windows shell argument escaping and quoting pitfalls.

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Prerequisites

This plugin requires ast-grep CLI installed on your machine:

• npm:

  npm install -g @ast-grep/cli
  

• pip:

  pip install ast-grep-cli
  

• cargo:

  cargo install ast-grep --locked
  

• brew (macOS/Linux):

  brew install ast-grep
  

Verify with:

ast-grep --version

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Installation in DSH

Option 1: Via DSH Market (Recommended)

Once published and indexed, search for dsh-tool-ast-grep in Settings → Plugin Market and click Install.

Or run in terminal:

dsh plugin --profile web add dsh-tool-ast-grep

Option 2: Mount in an Agent Preset

In your agent configuration (e.g. ~/.dsh/.agent-presets/your-agent/agent.cordis.yml):

id: my-agent
name: My Agent
tools:
  - id: tool-ast-grep
    name: dsh-tool-ast-grep
    config:
      maxResults: 50
      timeoutMs: 60000

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Tool API Overview

1. ast_search

Parameter	Type	Description
pattern	string	AST pattern, e.g. function $NAME($$$) { $$$ } or $OBJ.push($ITEM)
kind	string	AST node kind, e.g. class_declaration, function_declaration
path	string	Directory or file path to search in (defaults to workspace root)
lang	string	Language override (ts, tsx, js, jsx, python, rust, go, etc.)
globs	string	File glob pattern to include/exclude (e.g. src/**/*.ts)
limit	integer	Max matches to return (default: 50)

2. ast_outline

Parameter	Type	Description
file_path	string	Path of the file to inspect
lang	string	Language override (auto-detected if omitted)
depth	integer	1 for top-level only (default), 2 to include class methods

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Supported Languages

TypeScript (ts, tsx), JavaScript (js, jsx), Python (py), Rust (rs), Go (go), Java (java), C (c, h), C++ (cpp, hpp, cc).

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License

MIT © Jaylor Wang (Jaylor-Wang)