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CHANGELOG.md

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Changelog

All notable changes to Delta-Behavior will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased

Planned

  • WASM module for browser-based coherence enforcement
  • Async runtime integration (tokio, async-std)
  • Metric export for Prometheus/Grafana monitoring
  • Python bindings via PyO3

0.1.0 - 2026-01-28

Added

Core Library

  • Coherence type with range validation (0.0-1.0)
  • CoherenceBounds for defining threshold parameters
  • CoherenceState for tracking coherence history and trends
  • DeltaSystem trait for implementing coherence-preserving systems
  • DeltaConfig with preset configurations (default(), strict(), relaxed())
  • DeltaEnforcer implementing three-layer enforcement

Configuration Types

  • EnergyConfig for soft constraint layer parameters
  • SchedulingConfig for medium constraint layer parameters
  • GatingConfig for hard constraint layer parameters

Transition System

  • Transition<T> generic transition wrapper
  • TransitionConstraint for defining transition limits
  • TransitionResult enum (Applied, Blocked, Throttled, Modified)

Attractor Dynamics

  • Attractor<S> for representing stable states
  • AttractorBasin<S> for tracking basin membership
  • GuidanceForce for computing attractor-directed forces

Enforcement

  • Three-layer enforcement stack (Energy, Scheduling, Gating)
  • EnforcementResult enum (Allowed, Blocked, Throttled)
  • Recovery mode handling with configurable margin

Applications (feature-gated)

  • 01 Self-Limiting Reasoning (self-limiting)

    • SelfLimitingReasoner with coherence-based depth limiting
    • Automatic activity reduction under uncertainty

  • 02 Computational Event Horizons (event-horizon)

    • ComputationalHorizon with asymptotic slowdown
    • No hard recursion limits

  • 03 Artificial Homeostasis (homeostasis)

    • HomeostasisSystem with multi-variable regulation
    • Coherence-based survival mechanism

  • 04 Self-Stabilizing World Models (world-model)

    • StabilizingWorldModel with belief coherence
    • Hallucination prevention via coherence gating

  • 05 Coherence-Bounded Creativity (creativity)

    • CreativeEngine with novelty/coherence balance
    • Bounded exploration in generative tasks

  • 06 Anti-Cascade Financial Systems (financial)

    • AntiCascadeMarket with coherence-based circuit breakers
    • Order rejection for cascade-inducing trades

  • 07 Graceful Aging (aging)

    • AgingSystem with complexity reduction
    • Function preservation under simplification

  • 08 Swarm Intelligence (swarm)

    • CoherentSwarm with global coherence enforcement
    • Action modification for coherence preservation

  • 09 Graceful Shutdown (shutdown)

    • GracefulSystem with shutdown as attractor
    • Automatic safe termination under degradation

  • 10 Pre-AGI Containment (containment)

    • ContainmentSubstrate with capability ceilings
    • Coherence-bounded intelligence growth

Documentation

  • Comprehensive rustdoc comments on all public APIs
  • Module-level documentation with examples
  • WHITEPAPER.md with executive summary and technical deep-dive
  • docs/API.md comprehensive API reference
  • ADR documents for all major design decisions
  • Mathematical foundations documentation

Testing

  • Unit tests for all core types
  • Integration tests for enforcement stack
  • Acceptance test demonstrating Delta-behavior under chaos
  • Per-application test suites

Architecture

  • Domain-Driven Design structure
  • Clean separation between core, applications, and infrastructure
  • Feature flags for minimal binary size

Technical Details

Coherence Bounds (Defaults)

Parameter Value Purpose
min_coherence 0.3 Absolute floor (writes blocked below)
throttle_threshold 0.5 Rate limiting begins
target_coherence 0.8 System seeks this level
max_delta_drop 0.1 Maximum per-transition drop

Energy Cost Model

cost = base_cost * (1 + instability)^exponent

Where:

  • base_cost = 1.0
  • exponent = 2.0
  • max_cost = 100.0
  • budget_per_tick = 10.0

Supported Platforms

  • Linux (x86_64, aarch64)
  • macOS (x86_64, aarch64)
  • Windows (x86_64)
  • WASM (wasm32-unknown-unknown)

Minimum Supported Rust Version (MSRV)

  • Rust 1.75.0

Dependencies

  • No required runtime dependencies (no_std compatible with alloc)
  • Optional: std feature for full functionality

Breaking Changes

  • Initial release - no breaking changes

Migration Guide

  • Initial release - no migration required

0.0.1 - 2026-01-15

Added

  • Initial project structure
  • Proof-of-concept implementation
  • Basic documentation

Version History Summary

Version Date Highlights
0.1.0 2026-01-28 First stable release with full API
0.0.1 2026-01-15 Initial proof-of-concept

Upgrade Notes

From 0.0.1 to 0.1.0

The 0.0.1 release was a proof-of-concept. Version 0.1.0 is a complete rewrite with:

  1. New API: The DeltaSystem trait replaces the previous ad-hoc functions
  2. Configuration: Use DeltaConfig instead of individual parameters
  3. Enforcement: The DeltaEnforcer provides unified enforcement
  4. Applications: Enable specific applications via feature flags

Example migration:

// 0.0.1 (proof-of-concept)
let coherence = check_coherence(&state);
if coherence > 0.3 {
    apply_transition(&mut state, &delta);
}

// 0.1.0 (stable)
use delta_behavior::{DeltaConfig, enforcement::DeltaEnforcer, Coherence};

let config = DeltaConfig::default();
let mut enforcer = DeltaEnforcer::new(config);

let current = system.coherence();
let predicted = system.predict_coherence(&transition);

match enforcer.check(current, predicted) {
    EnforcementResult::Allowed => system.step(&transition),
    EnforcementResult::Throttled(delay) => std::thread::sleep(delay),
    EnforcementResult::Blocked(reason) => eprintln!("Blocked: {}", reason),
}

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