What is OSRS-MCP-Companion CLAUDE.md?

Project instructions for the OSRS-MCP-Companion codebase, including how agents should investigate its RuneLite data-export components before making changes.

Use them when modifying the project: first locate relevant areas in the code wiki, then read the actual source files before writing code.

They prevent agents from relying only on generated wiki summaries, which may omit important implementation details.

How Sleepywalker69/OSRS-MCP-Companion configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to Sleepywalker69/OSRS-MCP-Companion. 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/Sleepywalker69/OSRS-MCP-Companion/master/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/Sleepywalker69/OSRS-MCP-Companion

Made for: Claude Code.

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/sleepywalker69/osrs-mcp-companion/claude-md/github.svg)](https://agentmods.dev/instructions/sleepywalker69/osrs-mcp-companion/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/sleepywalker69/osrs-mcp-companion/claude-md"><img src="https://agentmods.dev/badge/instructions/sleepywalker69/osrs-mcp-companion/claude-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/sleepywalker69/osrs-mcp-companion/claude-md"><img src="https://agentmods.dev/badge/instructions/sleepywalker69/osrs-mcp-companion/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 521 This file is loaded in full into every session.

When invoked 521 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	$0.00521	$0.00521
Opus 5.5	$0.00208	$0.00208
Sonnet 5.5	$0.00104	$0.00104
Haiku 4.5	$0.00052	$0.00052

Measured 2mo ago against content hash 5bf02f86001a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

OSRS-MCP-Companion 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 · 46 lines

What it actually says

runelite-json-export — Project Context

Stack: raw-http | none | java

0 routes | 0 models | 1 env vars | 12 import links

High-impact files (change carefully):

mcp-server\src\api.ts (imported by 5 files)
mcp-server\src\tools\wiki.ts (imported by 1 files)
mcp-server\src\tools\player-sync.ts (imported by 1 files)
mcp-server\src\tools\live-state.ts (imported by 1 files)
mcp-server\src\tools\widgets.ts (imported by 1 files)

Required env vars: OSRS_API_URL

Instructions for Claude Code

Two-Step Rule (mandatory)

Step 1 — Orient: Use wiki articles to find WHERE things live. Step 2 — Verify: Read the actual source files listed in the wiki article BEFORE writing any code.

Wiki articles are structural summaries extracted by AST. They show routes, models, and file locations. They do NOT show full function logic, middleware internals, or dynamic runtime behavior. Never write or modify code based solely on wiki content — always read source files first.

Read in order at session start:

.codesight/wiki/index.md — orientation map (~200 tokens)
.codesight/wiki/overview.md — architecture overview (~500 tokens)
Domain article (e.g. .codesight/wiki/auth.md) → check "Source Files" section → read those files
.codesight/CODESIGHT.md — full context map for deep exploration

Routes marked [inferred] in wiki articles were detected via regex — verify against source before trusting. If any source file shows ⚠ in the wiki, re-run npx codesight --wiki before proceeding.

Or use the codesight MCP server for on-demand queries:

codesight_get_wiki_article — read a specific wiki article by name
codesight_get_wiki_index — get the wiki index
codesight_get_summary — quick project overview
codesight_get_routes --prefix /api/users — filtered routes
codesight_get_blast_radius --file src/lib/db.ts — impact analysis before changes
codesight_get_schema --model users — specific model details

Only open specific files after consulting codesight context. This saves ~7,694 tokens per conversation.

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 · 46 lines · 521 tokens per session scan A 5bf02f86001a

Subscribe to this mod's changes

OSRS-MCP-Companion CLAUDE.md is an instructions file published in the GitHub repository Sleepywalker69/OSRS-MCP-Companion (4 stars, last pushed 5mo ago), licensed BSD-2-Clause. It adds 521 tokens to every session, about $0.0021 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.

Game development

OSRS-MCP-Companion CLAUDE.md next to 6 instructions from other repositories
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OSRS-MCP-Companion: Instructions file for Claude Code