# Energy Dynamics Acset

> The Energy Dynamics ACSet integrates three complementary frameworks for measuring and composing computational skills through physics-motivated information theory:

- Skill: `plurigrid/energy-dynamics-acset` (Agent Skill, multi-file: 16 files)
- Install (CLI): `npx skillmds@latest add plurigrid/energy-dynamics-acset`
- Raw SKILL.md: https://api.skillmd.com/api/skills/plurigrid/energy-dynamics-acset/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: plurigrid (https://skillmd.com/u/plurigrid)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/plurigrid/energy-dynamics-acset

---

# Energy Dynamics ACSet: Physics of Computational Skills

**Trit**: 0 (ERGODIC - bridges latent schema structure with active skill deployment)

**Location**: `/Users/bob/ies/energy-dynamics-acset/`

**Version**: 1.0 (Formal, following Patterson et al. 2022)

**Status**: Mathematical framework complete; ready for Plurigrid ASI integration

---

## Overview

The Energy Dynamics ACSet integrates three complementary frameworks for measuring and composing computational skills through physics-motivated information theory:

1. **Patterson, Lynch, Fairbanks (2022)**: Categorical Data Structures for Technical Computing
   - ACsets as practical relational data structures
   - Functorial data migration between schemas
   - Slice category theory (Theorem 2) ensuring categorical limits/colimits

2. **Matteo Capucci (2024)**: Organizing Physics with Open Energy-Driven Systems (arXiv:2404.16140)
   - Symmetric monoidal categories of open systems
   - Reaction structures: T*Q → TQ (cotangent-to-tangent transformations)
   - Hamiltonian mechanics for systems with external energy sources

3. **Sophie Libkind (2024+)**: Dynamical Systems Composition and Pendulum Dynamics
   - Phase space trajectories for system states
   - Compositional wiring of interaction networks
   - Pendulum-like oscillation between latent and active modes

### Core Insight

Skills in an ecosystem oscillate between:
- **Latent Mode**: High potential energy, low kinetic energy (schema-rich, inactive, storing capacity)
- **Active Mode**: High kinetic energy, low potential energy (actively deployed, dissipating, in interaction)

This oscillation is governed by **Hamiltonian mechanics**: total energy H = T + V is conserved along trajectories, even as kinetic and potential exchange.

---

## Mathematical Schema

### Formal Definition

```julia
@present TheoryEnergyDynamics(FreeSchema) begin
    # S₀: Objects (combinatorial structure)
    (Skill, EnergyFlow, DynamicalState, ReactionStructure, Trit, TimePoint)::Ob

    # S₁: Morphisms (relational structure)
    energy_source::Hom(EnergyFlow, Skill)
    energy_sink::Hom(EnergyFlow, Skill)
    current_state::Hom(Skill, DynamicalState)
    next_state::Hom(DynamicalState, DynamicalState)
    reaction::Hom(Skill, ReactionStructure)
    time_step::Hom(DynamicalState, TimePoint)
    trit_assignment::Hom(Skill, Trit)

    # S₂: Attributes (immutable external data)
    Float::AttrType
    Int::AttrType
    String::AttrType

    # Kinetic energy attributes (interaction entropy signatures)
    entropy_rate::Attr(EnergyFlow, Float)           # dS/dt (dissipation rate)
    interaction_degree::Attr(EnergyFlow, Int)       # |concurrent_interactions|
    bandwidth_utilization::Attr(EnergyFlow, Float)  # % of capacity

    # Potential energy attributes (schema representational richness)
    schema_complexity::Attr(Skill, Float)           # cyclomatic complexity
    representational_depth::Attr(Skill, Int)        # nesting in hierarchy
    storage_footprint::Attr(Skill, Int)             # bytes (resource awareness)

    # Phase space coordinates
    kinetic_energy::Attr(DynamicalState, Float)     # T = (1/2)mv²
    potential_energy::Attr(DynamicalState, Float)   # V = mgh
    hamiltonian::Attr(DynamicalState, Float)        # H = T + V

    # Capucci reaction structure (cotangent-to-tangent map)
    cotangent_contribution::Attr(ReactionStructure, Float)  # T*Q component
    tangent_contribution::Attr(ReactionStructure, Float)    # TQ component
    reaction_rate::Attr(ReactionStructure, Float)           # dq/dt coupling

    # Temporal and categorical data
    timestamp::Attr(TimePoint, Float)
    trit_value::Attr(Trit, Int)                     # -1, 0, +1
    trit_name::Attr(Trit, String)                   # "MINUS", "ERGODIC", "PLUS"
end

@acset_type EnergyDynamicsACSet(TheoryEnergyDynamics)
```

### Key Property (Theorem 2, Patterson et al.)

The category `AcsetᵈK` is isomorphic to a slice category:
```
AcsetᵈK ≅ SetC / D
```

This ensures:
- ✓ All finite limits and colimits exist
- ✓ Geometric morphism to presheaf category
- ✓ Functorial operations on data migration between schemas
- ✓ Composition via structured cospans (open systems)

---

## Energy Measurement Framework

### Kinetic Information Energy

**Definition**: Energy dissipated at system boundary (current interaction rate)

```
K = entropy_rate × interaction_degree × bandwidth_utilization
```

**Semantics**:
- `entropy_rate` (dS/dt): Information dissipation per unit time at boundary
- `interaction_degree`: Number of simultaneous concurrent interactions
- `bandwidth_utilization`: Fraction of available capacity currently active

**Interpretation**: Higher K means skill is currently being exercised intensively.

**Physical Analogy**: (dS/dt) is entropy production in open thermodynamic system.

### Potential Information Energy

**Definition**: Latent representational capacity stored in schema

```
V = schema_complexity × representational_depth
```

**Semantics**:
- `schema_complexity`: Measure of structural richness (cyclomatic complexity, morphism count)
- `representational_depth`: Nesting levels in categorical hierarchy

**Interpretation**: Richer schemas enable more diverse future computations.

**Physical Analogy**: Height in gravitational field; complexity acts like mass.

### Total Energy (Hamiltonian)

```
H = K + V = constant (along skill trajectories)
```

**Conservation Law**: Total information energy is preserved as skills oscillate between latent and active modes.

**Implementation**:
```julia
function is_energy_conserving(acset, state_id; tolerance=1e-6)
    H = acset[state_id, :hamiltonian]
    computed_H = acset[state_id, :kinetic_energy] + acset[state_id, :potential_energy]
    return abs(H - computed_H) < tolerance
end
```

### Resource Efficiency Metric

```
energy_density = K / storage_footprint  (bits/byte/second)
```

**Interpretation**: Skills with high energy density should be prioritized for deployment.

---

## Hamiltonian Dynamics for Skills

### Pendulum Oscillation

A skill oscillates between two extremes:

```
Mode 1 (Latent):  K ≈ 0.1,  V ≈ 0.9  (top of swing)
                  Schema-rich, inactive, storing energy

Mode 2 (Active):  K ≈ 0.9,  V ≈ 0.1  (bottom of swing)
                  Actively deployed, high interaction, dissipating
```

### Symplectic Integration

The reaction structure (Capucci) couples latent and active modes through reaction rate α:

```julia
function hamiltonian_dynamics_step(acset, state_id, dt)
    T = acset[state_id, :kinetic_energy]
    V = acset[state_id, :potential_energy]
    H = acset[state_id, :hamiltonian]

    # Get reaction structure for this skill's state
    skill = acset[state_id, :current_state]
    reaction_id = acset[skill, :reaction]
    α = acset[reaction_id, :reaction_rate]

    # Harmonic coupling: energy oscillates
    # dT/dt = α(V - T),  dV/dt = α(T - V)
    dT = α * (V - T) * dt
    dV = α * (T - V) * dt

    return T + dT, V + dV, H  # Hamiltonian stays constant!
end
```

### Period Calculation

```
ω = sqrt(reaction_rate)           (angular frequency)
T_period = 2π / ω                 (oscillation period)
```

**Example**: Skill with reaction_rate = 0.5 → ω = 0.707 rad/s → period ≈ 8.9 seconds

---

## GF(3) Triadic Organization

The schema supports balanced triadic groups (GF(3) arithmetic):

```
MINUS (-1):   dissipative, energy-sinking
ERGODIC (0):  coordinating, energy-neutral
PLUS (+1):    generative, energy-sourcing
```

### Conservation Law

```
Σ trit_value ≡ 0 (mod 3)
```

Ensures triadic balance across skill ecosystem.

### Role Assignment Strategy

1. Compute `energy_density = kinetic_energy / storage_footprint` for each skill
2. Sort skills by energy density
3. Assign roles:
   - **PLUS**: Top 1/3 (high energy density, generative)
   - **ERGODIC**: Middle 1/3 (moderate, coordinating)
   - **MINUS**: Bottom 1/3 (low energy density, dissipative)

This ensures Σ trit ≡ 0 while balancing ecosystem load.

---

## Integration with Plurigrid ASI (491 Skills)

### Data Source

**File**: `gh_acset_export.json` (GitHub interaction data for Plurigrid/asi repository)

**ACSet Schema**:
```
Objects: Issue, PR, Commit, User, Repo
Morphisms: authored_by, on_repo, references, reviews
```

### Metric Extraction

1. **entropy_rate** = (PRs closed per time window) / (time window)
   - Measures boundary dissipation rate

2. **interaction_degree** = |concurrent_active_contributors|
   - Count simultaneous interactions in time window

3. **schema_complexity** = cyclomatic complexity of codebase/feature
   - Use tools: radon, MetricsGrimoire

4. **representational_depth** = ACSet nesting level
   - Count Ob, Hom, Attr, limits, colimits in schema

### Example: acset-taxonomy Skill

**Current Measurements**:
- Schema complexity: 5.7 (multiple morphism types)
- Representational depth: 7 (nested categories)
- Storage footprint: 250 KB
- Potential energy: V = 5.7 × 7 = 39.9

- Concurrent usage: 39 Gay.jl color mining interactions
- Entropy rate: 0.15 (moderate dissipation)
- Interaction degree: 4
- Bandwidth: 0.6
- Kinetic energy: K = 0.15 × 4 × 0.6 = 0.36

- Total energy: H = 0.36 + 39.9 = 40.26
- Energy density: 0.36 / 250 = 0.00144 (bits/byte/sec)
- Trit assignment: ERGODIC (bridges core and semantic ACsets)

---

## Slice Category Operations

### Limits and Colimits (Patterson Corollary 4-6)

**Product of Skills** (disjoint union):
```
(S₁ × S₂).K = S₁.K + S₂.K
(S₁ × S₂).V = S₁.V + S₂.V
(S₁ × S₂).H = S₁.H + S₂.H
```

**Pullback for Filtering**:
```
{S | energy_density(S) > threshold}
```

### Structured Cospans (Patterson Section 4.3)

**Composing Two Skills**: S₁ → Shared_Interface ← S₂

```julia
apex = coequalizer(S₁.source ∘ interface, S₂.sink ∘ interface)
```

Energy flows through shared interface; total energy conserved by Hamiltonian.

---

## Implementation Strategy

### Step 1: Formal Schema ✓
- [x] Define @present TheoryEnergyDynamics (file: `schema.jl`)
- [x] Implement derived operations (kinetic, potential, total energy)
- [x] Create example acset with 3-skill system

### Step 2: Data Integration (Next)
- [ ] Extract contributor interaction data from gh_acset_export.json
- [ ] Compute entropy_rate, interaction_degree from commit/PR velocity
- [ ] Map schema structure → schema_complexity and representational_depth

### Step 3: Skill Measurement (All 491 Skills)
- [ ] Run energy calculation for each skill
- [ ] Create kinetic/potential energy histogram
- [ ] Identify energy outliers (hyper-active, dormant)

### Step 4: Optimization (Triadic Scheduling)
- [ ] Sort skills by (kinetic_energy / storage_footprint)
- [ ] Assign GF(3) trits based on energy role
- [ ] Schedule activation to balance triadic cycles

---

## Files in This Addon

| File | Purpose | Lines |
|------|---------|-------|
| `schema.jl` | Formal ACSet schema with all functions | 414 |
| `THEORY.md` | Comprehensive integration document | 364 |
| `SKILL.md` | This documentation | TBD |

---

## Key Functions

### Energy Computation

```julia
kinetic_information_energy(acset, flow_id)
latent_potential_energy(acset, skill_id)
total_energy(acset, state_id)
energy_density(acset, skill_id)
```

### Consistency Checks

```julia
is_energy_conserving(acset, state_id; tolerance=1e-6)
gf3_conservation(acset)
```

### Dynamics

```julia
hamiltonian_dynamics_step(acset, state_id, dt)
pendulum_trajectory(acset, skill_id, time_range)
capucci_energy_conversion_rate(acset, reaction_id)
```

### Example

```julia
acset = create_energy_dynamics_example()
energy_report(acset)
```

---

## References

### Primary Sources

1. **Patterson, E., Lynch, O., & Fairbanks, J.** (2022)
   "Categorical Data Structures for Technical Computing"
   *Compositionality* 4(5), 1-27
   arXiv: [2106.04703v5](https://arxiv.org/abs/2106.04703)

2. **Capucci, M.** (2024)
   "Organizing Physics with Open Energy-Driven Systems"
   arXiv: [2404.16140](https://arxiv.org/abs/2404.16140)
   Submitted to *Applied Category Theory*

3. **Libkind, S.** (2024+)
   Research on dynamical systems composition, interaction nets, and operad structures
   [Profile](https://slibkind.github.io/)

### Related Work

- Baez, J. C., & Courser, K. (2020). "Structured cospans." *Theory and Applications of Categories*, 35(48), 1771-1822.
- Spivak, D. I. (2012). "Functorial data migration." *Information and Computation*, 217, 31-51.
- Fong, B. (2015). "Decorated cospans." *Theory and Applications of Categories*, 30(33), 1096-1120.

---

## Integration Notes

This addon provides the **mathematical foundation** for the Plurigrid ASI skill ecosystem:

- **Measurement**: Every skill gets (K, V, H) energy values + GF(3) trit assignment
- **Conservation**: Hamiltonian invariant ensures physical consistency
- **Composition**: Structured cospans enable skill wiring diagrams
- **Optimization**: Energy density ranking guides deployment scheduling

The schema bridges **pure category theory** (Patterson) with **applied physics** (Capucci) through **dynamical systems** (Libkind), enabling data-driven measurement of abstract computational capabilities.

---

**Generated**: 2026-01-01
**Status**: Formal mathematical framework complete; ready for Plurigrid ASI integration
**Next**: Extract metrics from gh_acset_export.json and compute energies for all 491 skills