What is LightWeightChartsMCP AGENTS.md?

Project instructions for LightWeightChartsMCP, a server that lets coding agents search reference material for TradingView Lightweight Charts, a JavaScript charting library.

Use them when installing, building, running, indexing, linting, testing, or understanding the architecture of LightWeightChartsMCP.

They give agents the project's setup, build, run, lint, and test commands so work follows the repository's actual procedures.

How TheFractalyst/LightWeightChartsMCP configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to TheFractalyst/LightWeightChartsMCP. 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/TheFractalyst/LightWeightChartsMCP/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/TheFractalyst/LightWeightChartsMCP

Made for: Codex, OpenCode.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/thefractalyst/lightweightchartsmcp/agents-md/github.svg)](https://agentmods.dev/instructions/thefractalyst/lightweightchartsmcp/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/thefractalyst/lightweightchartsmcp/agents-md"><img src="https://agentmods.dev/badge/instructions/thefractalyst/lightweightchartsmcp/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/thefractalyst/lightweightchartsmcp/agents-md"><img src="https://agentmods.dev/badge/instructions/thefractalyst/lightweightchartsmcp/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 642 This file is loaded in full into every session.

When invoked 642 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.

Model	Per session	Once invoked
Fable 5.1	$0.00642	$0.00642
Opus 5.5	$0.00257	$0.00257
Sonnet 5.5	$0.00128	$0.00128
Haiku 4.5	$0.00064	$0.00064

Measured 2mo ago against content hash 299a77af6d89, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

LightWeightChartsMCP 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.

AGENTS.md · 78 lines

How it starts

The opening of the file, as written. The whole thing — 78 lines — stays where its author put it; the contents beside it link to each section on GitHub.

LightWeightChartsMCP - Agent Instructions

Overview

TradingView Lightweight Charts reference documentation MCP server with ~730 entries covering all 5 versions (3.8, 4.0, 4.1, 4.2, 5.0) plus tutorials and framework integrations.

Commands

Setup

pip install -e ".[dev]"

Build database (auto-builds on first run, or manually)

lwcmcp build

Run server

lwcmcp                                 # stdio (default)
lwcmcp --transport sse --port 8080     # SSE (HTTP)

Index database from pipeline

python pipeline/merge_and_index.py --reset

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 validator and ChromaDB
Hot cache for fast lookups
Response capping at 80KB
Error masking (no internal details leaked)
Regex-based JS/TS validator (no Node.js runtime required)

Tools (6)

+--------------+-----------+------------------------------------------+
| Tool         | Type      | Description                              |
+--------------+-----------+------------------------------------------+
| lwc_lookup   | read-only | Exact name lookup with fuzzy fallback    |
| lwc_search   | read-only | Semantic search across all entries       |
| lwc_browse   | read-only | List namespace members                   |
| lwc_validate | read-write| Validate JS/TS for Lightweight Charts    |
| lwc_repair   | read-write| Fix common Lightweight Charts issues     |
| lwc_scaffold | read-write| Generate chart template (7 kinds)        |
+--------------+-----------+------------------------------------------+

Data Pipeline

pipeline/scrape_lwc.py - Direct HTTP scraper for Lightweight Charts docs (github.io)
pipeline/merge_and_index.py - Merge + index into ChromaDB

Read the full file on GitHub · 78 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.

2mo ago First seen · 78 lines · 642 tokens per session scan A 299a77af6d89

Subscribe to this mod's changes

LightWeightChartsMCP AGENTS.md is an instructions file published in the GitHub repository TheFractalyst/LightWeightChartsMCP (2 stars, last pushed 3mo ago), licensed MIT. It adds 642 tokens to every session, about $0.0026 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.

LightWeightChartsMCP AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
LightWeightChartsMCP AGENTS.mdTheFractalyst/LightWeightChartsMCP	Instructions file	2	3mo ago	MIT	A	642	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,516	GitHub Copilot
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	275k	3d ago	MIT	A	4,313	Codex, OpenCode

LightWeightChartsMCP: Instructions file for Codex