Borrowing it
Nothing to install: this file belongs to buildonspark/spark. 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/buildonspark/spark/main/GEMINI.mdgit clone --depth 1 https://github.com/buildonspark/sparkWrote 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/buildonspark/spark/gemini-md)<a href="https://agentmods.dev/instructions/buildonspark/spark/gemini-md"><img src="https://agentmods.dev/badge/instructions/buildonspark/spark/gemini-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/buildonspark/spark/gemini-md"><img src="https://agentmods.dev/badge/instructions/buildonspark/spark/gemini-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 | $0.01343 | $0.01343 |
| Opus 5.5 | $0.00537 | $0.00537 |
| Sonnet 5.5 | $0.00269 | $0.00269 |
| Haiku 4.5 | $0.00134 | $0.00134 |
Grade A, and why
spark 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 1mo 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.
How it starts
The opening of the file, as written. The whole thing — 170 lines — stays where its author put it; the contents beside it link to each section on GitHub.
GEMINI.md
This file provides guidance to Gemini CLI when working with code in this repository.
Essential Commands
Setup
# Install toolchain and dependencies
mise trust
mise install
# Install git hooks (optional but recommended)
lefthook install
Building
# Generate proto files (required after proto changes)
make
# Generate Ent entities (required after schema changes)
make ent
Testing
# Unit tests (fast, no postgres dependencies)
mise test-unit
# Unit tests with postgres dependencies
mise test-unit-with-postgres
# Integration/gRPC tests (requires environment setup)
mise test-grpc
# Run a single test
go test ./path/to/package -run TestName
# Run tests with verbose output
go test -v ./path/to/package
Linting
# Run Go linter (builds/runs ./bin/golangci-lint-spark, which bundles the in-repo fmtlint plugin;
# plain `golangci-lint run` can't load the plugin and will error)
mise lint
# To fix linter issues
mise format
# OR
golangci-lint fmt
Database Migrations
# After modifying Ent schemas, generate migration
./scripts/gen-migration.sh <migration_name>
# Apply migration manually (if needed)
atlas migrate apply --dir "file://so/ent/migrate/migrations" --url "postgresql://127.0.0.1:5432/sparkoperator_0?sslmode=disable"
Development Environment
# Local development with tmux (requires setup)
./run-everything.sh
# Hermetic testing in minikube via Tilt (recommended)
cd tilt && tilt up
See tilt/TILT.md for full Tilt setup, including how to build and run a
local image (spark-tag: local in tilt/tilt_config.json).
Architecture Overview
High-Level Structure
This repository implements Spark, a Bitcoin-based system with the following main components:
- Signing Operators (SO): Distributed nodes that collectively manage Bitcoin transactions and cryptographic operations
- Wallet: Client-side interface for users to interact with the Spark network
- Signer: Rust-based FROST (Flexible Round-Optimized Schnorr Threshold) signing implementation
- LRC20: Layer for token functionality on top of Bitcoin
- SDKs: JavaScript and Rust SDKs for external integration
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.
- 1mo ago First seen · 170 lines · 1,343 tokens per session scan A 9f4380752c08
spark GEMINI.md is an instructions file published in the GitHub repository buildonspark/spark (114 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 1,343 tokens to every session, about $0.0054 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 2026-09-03.
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