Reproducing the phase-diagram paper

Target paper: A Phase Diagram of Decentralized Coordination Under Communication Delay.

Versions pinned for the canonical results

Fill the TBD hashes from the provenance.packages block of any cell’s committed experiment.json (the run recorded gossamer 0.3.1).

Environment setup

python3.10 -m venv .venv && source .venv/bin/activate
pip install --extra-index-url https://us-central1-python.pkg.dev/arboria-research/python-packages/simple/ \
    gossamer-threaded-intelligence==0.3.1
export ENGINE_MODE=inprocess
export PYTHONHASHSEED=0

The grid

The canonical run is the dcc_p1 batch: primitive × task × delay × N × seed.

Total: 900 cells. *coverage_hold is collected but excluded from the headline figures (no current primitive achieves targeted coverage — see the paper’s scope section); dmb_tf_aco is a dispersal primitive and is omitted from the collapse panels.

Fixed parameters: dt=1.0, tau_sec=300, bound=1000, init_spread=500, comm_range=1200 (connected interaction graph), energy_rate=0 and fault_prob=0 (so agent attrition cannot confound the delay axis), integrator=velocity_verlet, steps=1500.

Reproduce

The grid was scheduled through Maneuver.Map’s /jobs/experiment sweep endpoint (one Cloud Run task per cell); the same specs run locally via scripts/run_paper_experiments.py --plan p1. Each cell writes an experiment.json with the full provenance block. Figures regenerate from the committed batch folder (dcc_p1-…) by aggregating task_metrics.Q_final over seeds by (task, algorithm, delay, N).

Anchor

The Vicsek substrate anchor is the vicsek batch: flocking→vicsek primitive, velocity_noise ∈ {0, 0.5, …, 5} × 5 seeds (45 cells), energy_rate=0. It reproduces the order–disorder decay ψ: 1.00 → 0.63.

Expected outcome

no_comm holds the floor at every delay; the three communicating primitives collapse together from Q ≈ 1 (delay 0) through a boundary near 10–20 steps to the floor by delay 40, identically at N = 500 and N = 2000. The run produced 0 non-finite values and 0 agent faults.