Borrowing it
Nothing to install: this file belongs to TheFractalyst/QuantConnectMCP. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/TheFractalyst/QuantConnectMCP/main/AGENTS.mdgit clone --depth 1 https://github.com/TheFractalyst/QuantConnectMCPWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/thefractalyst/quantconnectmcp/agents-md)<a href="https://agentmods.dev/instructions/thefractalyst/quantconnectmcp/agents-md"><img src="https://agentmods.dev/badge/instructions/thefractalyst/quantconnectmcp/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/thefractalyst/quantconnectmcp/agents-md"><img src="https://agentmods.dev/badge/instructions/thefractalyst/quantconnectmcp/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00437 | $0.00437 |
| Opus 5.5 | $0.00175 | $0.00175 |
| Sonnet 5.5 | $0.00087 | $0.00087 |
| Haiku 4.5 | $0.00044 | $0.00044 |
Grade A, and why
QuantConnectMCP AGENTS.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.
What it actually says
QuantConnectMCP - Agent Instructions
Overview
QuantConnect/Lean Complete Reference MCP server with 1265 entries covering 100% of the official documentation sitemap.
Commands
Setup
python -m venv .venv
source .venv/bin/activate
pip install -e ".[dev]"
Index database
qc-lean-mcp build
Run server
qc-lean-mcp # stdio (default)
TRANSPORT=sse PORT=8080 qc-lean-mcp # HTTP/SSE
Lint
ruff check . --line-length 120
Test
pytest tests/ -v
Architecture
- FastMCP 3.4 with FileSystemProvider for auto-discovery
- ChromaDB vector store (cosine, all-MiniLM-L6-v2, 384-dim)
- 3 composable lifespans: db | model | cache
- Circuit breaker on compiler and ChromaDB
- Hot cache for fast lookups
- Response capping at 80KB
- Error masking (no internal details leaked)
Tools (6)
+--------------+-----------+------------------------------------------+
| Tool | Type | Description |
+--------------+-----------+------------------------------------------+
| qc_lookup | read-only | Exact name lookup with fuzzy fallback |
| qc_search | read-only | Semantic search across all entries |
| qc_browse | read-only | List namespace members |
| qc_validate | read-write| Validate Python Lean algorithm syntax |
| qc_repair | read-write| Fix common code issues |
| qc_scaffold | read-write| Generate algorithm template |
+--------------+-----------+------------------------------------------+
Coverage
- 100% official sitemap coverage (1257/1257 docs URLs)
- 1265 entries in ChromaDB
- 20 namespaces (cloud, indicators, writing-algorithms, cli, etc.)
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.
- 2mo ago First seen · 66 lines · 437 tokens per session scan A 0ffefae1ec4f
QuantConnectMCP AGENTS.md is an instructions file published in the GitHub repository TheFractalyst/QuantConnectMCP (2 stars, last pushed 3mo ago), licensed MIT. It adds 437 tokens to every session, about $0.0017 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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