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mcp-scalable-capital: Instructions file for Claude Code

CLAUDE.md

mcp-scalable-capital CLAUDE.md is an instructions file for Claude Code from NinjaEde/mcp-scalable-capital. It costs 884 tokens per session, scanned A, original, MIT.

A set of Claude Code instructions for maintaining a server that wraps the Scalable Capital sc command-line tool. It explains how to check compatibility when the underlying tool changes.

In plain words
What is it for?
It is for checking versions and capabilities, comparing supported commands, updating the server, and keeping its package manifest in sync.
Why use it?
It reduces the risk of the server becoming inconsistent with a changing command-line interface.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md.

This is NinjaEde/mcp-scalable-capital's own configuration. It tells Claude Code how to work on mcp-scalable-capital 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 mcp-scalable-capital configures →

not rated 1repo 2mo ago A scan 884 tokens original MIT
View source ↗ NinjaEde/mcp-scalable-capital
Reuse

Borrowing it

Nothing to install: this file belongs to NinjaEde/mcp-scalable-capital. 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/NinjaEde/mcp-scalable-capital/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/NinjaEde/mcp-scalable-capital

Made for: Claude Code.

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Per session 884 This file is loaded in full into every session.
When invoked 884 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 $0.00884 $0.00884
Opus 5.5 $0.00354 $0.00354
Sonnet 5.5 $0.00177 $0.00177
Haiku 4.5 $0.00088 $0.00088

Measured 2mo ago against content hash dcc3a6dca8a8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mcp-scalable-capital 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 · 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.

Maintaining sc-mcp

This server is a thin wrapper around the Scalable Capital sc CLI. Its main maintenance burden is staying in sync with sc, which is pre-1.0 and can change its command surface between minor versions.

When a new sc version ships

Run the machine-readable capability dump and compare it against what the server assumes:

sc --version
sc capabilities --json | python3 -m json.tool | less
  1. Version. Compare data.version to SUPPORTED_SC_VERSION in src/sc_mcp/server.py. If the major.minor changed, work through the rest of this list, then bump the constant.
  2. Commands. Diff data.commands against the tools in server.py (read-only: broker.overview, broker.holdings, broker.transactions, broker.transaction.details, broker.analytics, broker.quote, broker.search, broker.security-news, broker.cash-breakdown, broker.chart, overnight, overnight.transactions, broker.portfolio-groups, broker.derivatives.search, broker.watchlist, broker.price-alerts, broker.savings-plans.config, capabilities; write-only behind SC_MCP_ENABLE_WRITES: broker.watchlist.add/remove, broker.price-alerts.add/remove, broker.portfolio-groups.create/update/delete/assign/unassign). New read-only broker command → consider adding a tool. Renamed/removed → update or drop the tool.
  3. Flags. For each wrapped command, re-check its --help. If a flag the server passes was renamed or removed, fix the tool and its case in ARGV_CASES in tests/test_sc_mcp.py.
  4. Exit codes / envelope. data.exit_codes and data.output describe the error and JSON-envelope contract _run_sc relies on. If they change, adjust error handling.
  5. Update the Compatibility line in README.md and SUPPORTED_SC_VERSION.

Before committing

uv run ruff check . && uv run ruff format --check . && uv run pytest

Versioning the change

SemVer on the tools (see README → Versioning): tool removed/renamed = MAJOR, tool/optional-param added = MINOR, fix = PATCH. Then:

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.

  1. 2mo ago First seen · 78 lines · 884 tokens per session scan A dcc3a6dca8a8

Subscribe to this mod's changes

mcp-scalable-capital CLAUDE.md is an instructions file published in the GitHub repository NinjaEde/mcp-scalable-capital (1 stars, last pushed 2mo ago), licensed MIT. It adds 884 tokens to every session, about $0.0035 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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