coding-tools-mcp 0.1.3

Workspace-confined coding tools exposed as an MCP server.

Coding Tools MCP

Coding Tools MCP is a model-neutral coding-agent runtime MCP server. It exposes local coding primitives to any MCP client:

inspect repo -> search/read files -> apply structured patches -> run tests/commands
-> interact with stdin sessions -> inspect git status/diff

It is not a prompt wrapper. It does not expose external agent accounts, memory, cloud tasks, web search, image generation, model routing, plugin marketplace, or subagent orchestration as MCP tools.

Documentation Map

• Quickstart
• MCP client configuration
• Remote MCP
• Tools and schemas
• Security policy
• CI and test commands
• Dogfood
• SWE-bench evaluation
• Known limitations
• Troubleshooting
• Competitive analysis
• Normative MCP runtime profile: docs/profile-v0.1.md

Quickstart

Run directly with uvx against the current directory:

uvx coding-tools-mcp --workspace .

Use stdio for MCP clients:

uvx coding-tools-mcp --stdio --workspace /path/to/repo

If you are working from this checkout instead of a published package:

cd /root/coding-tools-mcp
python -m pip install -e ".[dev]"
coding-tools-mcp --workspace /path/to/repo --host 127.0.0.1 --port 8765

Install the optional image extra when you want view_image auto-resize support:

python -m pip install -e ".[image]"

HTTP endpoint:

http://127.0.0.1:8765/mcp

Stdio:

coding-tools-mcp --stdio --workspace /path/to/repo

Set CODING_TOOLS_MCP_TRACE=1 to emit redacted JSON tool-call trace events to stderr for local debugging. Logs stay off stdout so stdio JSON-RPC remains clean.

If your MCP client does not support permission elicitation and you explicitly want permission-gated operations to run, start with:

coding-tools-mcp --dangerously-skip-all-permissions --workspace /path/to/repo

This auto-grants permission-gated operations such as network-looking commands, destructive commands, shell expansion, and sensitive env passed through exec_command. Workspace path boundaries still apply.

MCP Client Examples

Generic stdio client:

[mcp_servers.coding_tools]
command = "uvx"
args = ["coding-tools-mcp", "--stdio", "--workspace", "/path/to/repo"]

Claude Code:

{
  "mcpServers": {
    "coding-tools": {
      "command": "uvx",
      "args": ["coding-tools-mcp", "--stdio", "--workspace", "/path/to/repo"]
    }
  }
}

Cursor:

{
  "mcpServers": {
    "coding-tools": {
      "command": "uvx",
      "args": ["coding-tools-mcp", "--stdio", "--workspace", "/path/to/repo"]
    }
  }
}

Generic Streamable HTTP clients should use MCP protocol version 2025-06-18 and point at http://127.0.0.1:8765/mcp.

Remote MCP

For remote MCP clients and local development over an HTTPS tunnel, keep the server bound to loopback and expose the tunnel URL with the safest profile your client can use. Anonymous tunnel testing should use read-only mode:

CODING_TOOLS_MCP_AUTH_MODE=noauth \
CODING_TOOLS_MCP_TOOL_PROFILE=read-only \
./scripts/tunnel.sh cloudflared /path/to/repo

Configure the remote MCP client with the HTTPS tunnel URL:

URL: https://<tunnel-host>/mcp

The tunnel scripts support cloudflared, ngrok, and Microsoft Dev Tunnel. If the selected tunnel CLI is missing, the script asks before installing it:

scripts/tunnel.sh cloudflared /path/to/repo
scripts/tunnel.sh ngrok /path/to/repo
scripts/tunnel.sh devtunnel /path/to/repo

For clients that support custom headers, use bearer-token auth with Authorization: Bearer <token>. Clients that cannot send custom bearer headers should use anonymous read-only mode only for local/testing tunnels, or be placed behind an external auth proxy for production use.

See docs/remote-mcp.md for the exact modes and security notes.

Tool Profiles

• full: exposes all tools with truthful annotations. This is the default for backward compatibility.
• read-only: recommended for remote or safe-mode clients; exposes only inspection tools, git read tools, image viewing, and default-cwd helpers.
• compat-readonly-all: exposes all tools but advertises every tool as read-only for clients that gate availability on readOnlyHint. This is not a safety mode; mutation-capable tools such as apply_patch, exec_command, write_stdin, and kill_session can still mutate local state.

Tools

P0 tools exposed by default:

• server_info
• get_default_cwd
• set_default_cwd
• read_file
• list_dir
• list_files
• search_text
• apply_patch
• exec_command
• write_stdin
• kill_session
• git_status
• git_diff
• git_log
• git_show
• git_blame
• request_permissions

Additional image tool exposed by default:

• view_image

For input/output schemas and result envelopes, see docs/tools-and-schemas.md and docs/profile-v0.1.md.

Safety Boundary

The runtime binds one workspace root per server process. Paths are workspace-relative by default. Absolute paths, .. traversal, and symlink escapes are rejected. Recursive listing/search excludes .git, .reference, node_modules, target, dist, build outputs, virtualenvs, and common caches by default.

exec_command runs under policy controls with workspace-bound cwd, timeout, output caps, sensitive-value and loader/startup environment rejection, destructive command checks, network-looking command checks, shell-expansion permission gates, indirect absolute-path checks, cancellation/kill cleanup, session deadline watchdogs, and bounded session buffers. On Linux hosts with Landlock support it also applies filesystem confinement; on Windows, macOS, or Linux hosts without Landlock, command results include a warning and external sandboxing is required before running untrusted commands. This is still not a complete OS/container sandbox; see SECURITY.md.

--dangerously-skip-all-permissions disables the permission gates above for operators who accept that risk. Do not use it for untrusted workspaces or untrusted MCP clients.

Compliance

make compliance

Compliance and CI commands are documented in docs/ci-and-tests.md. The checked-in report files are generated artifacts; inspect their suite field before treating them as full compliance evidence.

Dogfood And Benchmark

Dogfood and SWE-bench notes live in docs/dogfood.md, docs/swe-bench.md, and BENCHMARK.md. This repository does not claim a model-generated SWE-bench leaderboard result.

Development Commands

make lint
make typecheck
make test
make compliance
make ci

See docs/ci-and-tests.md for the full test matrix.

License

This project is source-available, not open source. See LICENSE. Internal evaluation, development, testing, and security review are permitted; redistribution, hosted third-party service use, and production commercial use require prior written permission.