Deterministic · Verified · Zero-Token

The deterministic
function registry

Install verified, tested function packs. Pure math and logic — no LLM calls, no tokens burned, no hallucinations. Every function has a test proving it works.

$ nanosistant install music-theory-core

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16

Function Packs

211

Total Functions

100%

Avg Test Coverage

0

Tokens Required

840

Tests Passing

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Get started in one command

Install any pack directly from your terminal. Zero configuration, instant access to verified functions.

$ nanosistant install <pack-name>

Contribute a Pack

Browse Packs

Discover verified, deterministic function packs for Nanosistant.

Contribute a Function Pack

Ship verified, deterministic functions to the community. Three steps, one PR — your logic, tested and shared.

1

Define your pack

Create a pack.toml manifest describing your pack, its functions, and metadata.

[pack]
name = "my-awesome-pack"
version = "0.1.0"
author = "your-name"
tier = "Domain"
domain = "music"
description = "Short description"

2

Write your functions

Implement deterministic functions in TOML rules (low friction) or Rust (power users). No LLM calls — pure logic.

# rules.toml — the easy path
[[rule]]
name = "bpm_to_ms"
input = "bpm: f64"
output = "f64"
formula = "60000.0 / bpm"
description = "Convert BPM to ms"

3

Test & submit

Every function needs a test proving it works. Run the test suite, then open a PR to the packs repo.

# Run tests
$ nanosistant test my-awesome-pack
✓ bpm_to_ms(120) == 500.0
✓ bpm_to_ms(140) == 428.571...
✓ All 2 tests passing

# Submit via PR
$ git push origin my-awesome-pack

pack.toml format

The manifest file that describes your pack to the registry.

pack.toml

[pack]
name = "music-theory-core"
version = "0.6.0"
author = "nanosistant"
tier = "Domain"           # Universal | Domain | Operator
domain = "music"
description = "Scale degrees, chord-to-roman, BPM math..."
tags = ["music", "theory", "production"]

[compatibility]
nanosistant_min = "0.6.0"

[routing]
keywords = ["scale", "chord", "bpm", "tempo"]
semantic = "Music theory calculations and analysis"

rules.toml format

The low-friction path — define functions as TOML rules. No Rust knowledge needed.

rules.toml

[[rule]]
name = "bpm_to_ms"
input = "bpm: f64"
output = "f64"
formula = "60000.0 / bpm"
description = "Convert BPM to milliseconds per beat"

[[rule]]
name = "delay_time"
input = "bpm: f64, subdivision: &str"
output = "f64"
formula = "match subdivision { \"1/4\" => 60000.0/bpm, \"1/8\" => 30000.0/bpm, _ => 0.0 }"
description = "Calculate delay time for a given BPM and note subdivision"

[[test]]
function = "bpm_to_ms"
input = "120.0"
expected = "500.0"

functions.rs format

For power users — write functions in Rust for maximum performance and type safety.

functions.rs

use nanosistant_sdk::{function, NstnResult};

/// Convert BPM to milliseconds per beat
#[function]
pub fn bpm_to_ms(bpm: f64) -> NstnResult<f64> {
    if bpm <= 0.0 {
        return Err("BPM must be positive".into());
    }
    Ok(60000.0 / bpm)
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_bpm_to_ms() {
        assert_eq!(bpm_to_ms(120.0).unwrap(), 500.0);
        assert_eq!(bpm_to_ms(140.0).unwrap(), 428.571428571);
    }
}

Test Requirements

Every function pack must include tests. No exceptions — this is the trust signal that separates NSTN Hub from prompt marketplaces.

Every exported function must have at least one test
Tests must use concrete expected values — no fuzzy matching
Edge cases: zero, negative, empty, and boundary inputs
CI runs all tests on every PR — failures block merge
Target 100% test coverage for maximum quality score

Ready to contribute?

Use the visual form builder to create and submit your pack — no git commands needed.

Open Pack Builder View on GitHub

Pack Metadata

Pack Name *

Lowercase, hyphens only — e.g. music-utils

Description *

Domain *

Version

Tier *

Universal Math & logic with no domain dependency Domain Domain-specific functions (music, finance, etc.) Operator Custom community or niche-domain packs

Functions