bankbridge-plugin: Instructions file for Gemini CLI

GEMINI.md

bankbridge-plugin GEMINI.md is an instructions file for Gemini CLI from bankbridge-money/bankbridge-plugin. It costs 534 tokens per session, scanned A, original, MIT.

Instructions for using BankBridge in Gemini CLI, a command-line interface for Gemini. They explain setup, account-data tools, and how to interpret read-only results from connected US bank, credit-card, and brokerage accounts.

In plain words
What is it for?
Use them to answer questions about balances, spending, transactions, subscriptions, bills, cash flow, credit use, and investment holdings.
Why use it?
They help the agent choose the right account query and handle missing connections or setup responses correctly. BankBridge cannot move money, pay bills, or place trades.

Instructions file for Gemini CLI

Written for Gemini CLI: the file is GEMINI.md. Also seen: positional $N argument; mentions Gemini CLI.

This is bankbridge-money/bankbridge-plugin's own configuration. It tells Gemini CLI how to work on bankbridge-plugin 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 bankbridge-plugin configures →

Reuse

Borrowing it

Nothing to install: this file belongs to bankbridge-money/bankbridge-plugin. 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/bankbridge-money/bankbridge-plugin/main/GEMINI.md
Clone the repo
git clone --depth 1 https://github.com/bankbridge-money/bankbridge-plugin

Made for: Gemini CLI.

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Per session 534 This file is loaded in full into every session.
When invoked 534 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 $0.00534 $0.00534
Opus 5.5 $0.00214 $0.00214
Sonnet 5.5 $0.00107 $0.00107
Haiku 4.5 $0.00053 $0.00053

Measured 4d ago against content hash 233ce3e60c10, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

bankbridge-plugin GEMINI.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 4d 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.

GEMINI.md · 32 lines

How it starts

The opening of the file, as written. The whole thing — 32 lines — stays where its author put it; the contents beside it link to each section on GitHub.

BankBridge

BankBridge is a remote MCP server (https://bankbridge.money/api/mcp) that gives you read-only access to the user's connected US bank, credit card and brokerage accounts. Every tool call fetches live data from the bank. Nothing can move money, pay a bill or place a trade.

Setup

  • The first time, the user runs /mcp auth bankbridge inside Gemini CLI and signs in at bankbridge.money in the browser. No API key is needed.
  • If a result says setup_required or has a NO_CONNECTIONS notice, show the user the link in the result. It finishes the subscription or connects a bank. Pricing is $5 a month per connected bank, or $50 a year.
  • Full setup guide: https://bankbridge.money/docs/gemini-cli

Which tool for which question

Question Tool
Balances, account list, credit utilization list_accounts, get_account
"How much did I spend on X?" get_spending_summary (group by category, merchant, month or week)
Find a specific charge or merchant search_transactions, then get_merchant_history
Subscriptions and bills get_recurring_charges
"Am I making more than I spend?" get_monthly_cashflow (one call per month, month: "YYYY-MM")
Raw transactions with filters list_transactions (date range, amount, category, account; paginate with offset)
Category names to filter by list_categories
Portfolio, gains, dividends list_holdings, list_investment_transactions
Add another bank connect_bank (returns a link for the user)

Reading the data correctly

  • Amounts are dollars. Positive = money leaving the account (spending). Negative = money coming in (income, refunds).
  • Credit card payments from checking are not new spending: the purchases already appear on the card. Leave them out of spending totals.
  • Transfers between the user's own accounts are not spending. Transfers to other people (rent to a landlord, for example) are.
  • Account ids can change when a bank is reconnected. Start a session with list_accounts instead of reusing old ids.
  • Every result has a warnings array. If it is not empty, tell the user (for example, a bank that needs reconnecting, with its reconnect link) and say the totals cover only the banks that answered.

Read the full file on GitHub · 32 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. 4d ago First seen · 32 lines · 534 tokens per session scan A 233ce3e60c10

Subscribe to this mod's changes

bankbridge-plugin GEMINI.md is an instructions file published in the GitHub repository bankbridge-money/bankbridge-plugin (0 stars, last pushed 5d ago), licensed MIT. It adds 534 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 2026-10-10.

Related

Other instructions, from other repositories