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dstools: Instructions file for Claude Code

CLAUDE.md

dstools CLAUDE.md is an instructions file for Claude Code from lijiatuk/dstools. It costs 1,053 tokens per session, scanned A, original, MIT.

A project guide for dstools, a local MCP server that adds image understanding and deep research to the DeepSeek-V4 model. It documents the server's commands, design, model settings, and how to add a tool.

In plain words
What is it for?
Use it when installing dstools, configuring its models and API keys, learning how its tools work, or extending the server with another tool.
Why use it?
It gives developers one reference for understanding and modifying the repository. It explains the project-specific setup instead of leaving contributors to infer the architecture from the code.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md.

This is lijiatuk/dstools's own configuration. It tells Claude Code how to work on dstools itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything dstools configures →

not rated 1repo 4mo ago A scan 1,053 tokens original MIT
View source ↗ lijiatuk/dstools
Reuse

Borrowing it

Nothing to install: this file belongs to lijiatuk/dstools. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/lijiatuk/dstools/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/lijiatuk/dstools

Made for: Claude Code.

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Per session 1,053 This file is loaded in full into every session.
When invoked 1,053 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.01053 $0.01053
Opus 5.5 $0.00421 $0.00421
Sonnet 5.5 $0.00211 $0.00211
Haiku 4.5 $0.00105 $0.00105

Measured 2mo ago against content hash 0c7d52f29e51, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

dstools CLAUDE.md 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 2mo ago.

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.

CLAUDE.md · 76 lines

How it starts

The opening of the file, as written. The whole thing — 76 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md — dstools

A reference for anyone (human or AI) working in this repo.

What this is

dstools is an MCP server that gives DeepSeek-V4 (a text-only model) two capabilities it lacks natively: image understanding and deep research. It exposes 5 tools over stdio / Streamable HTTP / SSE.

DeepSeek-V4 specifics (verified 2026-06-30 via the official API docs)

  • API is OpenAI-compatible; base_url=https://api.deepseek.com (Anthropic format at /anthropic). Use the openai SDK.
  • Models: deepseek-v4-flash (cheap/fast) and deepseek-v4-pro (heavy). The legacy deepseek-chat / deepseek-reasoner are deprecated 2026-07-24.
  • Thinking mode: toggle via extra_body={"thinking": {"type": "enabled"|"disabled"}} (default enabled); effort via reasoning_effort (high/max). In thinking mode temperature/top_p are silently ignored; CoT is returned as message.reasoning_content.
  • JSON output: response_format={"type": "json_object"}. Tool calls: standard OpenAI function format. Context caching: automatic (keep system prompts constant to benefit).

Adaptations live in src/dstools/llm/deepseek.py: per-call thinking toggle, reasoning_content capture, JSON mode, retry with backoff, pro/flash model split (pro for synthesis, flash for cheap planning).

Commands

uv sync --extra dev          # install
uv run dstools serve         # run MCP server (stdio)
uv run dstools serve --transport http --port 8000
uv run dstools inspect       # list tools + param schemas
uv run dstools doctor        # what's configured (keys/providers)
make lint && make typecheck && make test
uv run python examples/mcp_client_demo.py   # end-to-end stdio smoke test

Architecture

  • server.py — FastMCP instance + tool registration (create_server()).
  • cli.py — dstools CLI (serve / inspect / doctor / cache / version).
  • config.py — Settings (pydantic-settings, env + .env). DeepSeek fields also accept the generic LLM_* aliases (LLM_API_KEY/LLM_BASE_URL/LLM_MODEL/...).
  • runtime.py — lazy singletons; wraps search/fetcher in the cache when enabled.
  • cache.py — opt-in on-disk retrieval cache (RetrievalCache + caching wrappers).
  • llm/ — DeepSeekClient (V4-aware) + VisionClient (pluggable multimodal).
  • search/ — providers: DuckDuckGoSearchProvider (keyless default, ad-filtered, retry/backoff) + BraveSearchProvider + TavilySearchProvider (both keyed).
  • web/fetcher.py — async page fetch (streamed, size-capped) + HTML→Markdown; defines the Fetcher Protocol satisfied by PageFetcher and the cache wrapper.
  • tools/ — logic functions (testable, DI) + register(mcp) wrappers; deep_research = plan → round loop (search/fetch/refine) → rerank → synthesize. _ctx.py makes ctx calls defensive (never crash on missing session).
  • utils/ — image I/O + text helpers.

Read the full file on GitHub · 76 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. 2mo ago First seen · 76 lines · 1,053 tokens per session scan A 0c7d52f29e51

Subscribe to this mod's changes

dstools CLAUDE.md is an instructions file published in the GitHub repository lijiatuk/dstools (1 stars, last pushed 4mo ago), licensed MIT. It adds 1,053 tokens to every session, about $0.0042 per session on Opus 5.5. 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 2026-08-31.

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