Observation.
ECHOS (Emergent Cognition & Holistic Observation System) reads the traces produced by SYNE and derives measurements from them. It observes the world without ever intervening in it.
Experimental ECHOS 0.1.0 · Python package (repository)
Experimental: the headless API is functional in the repository, but not publicly distributed to date.
Turning traces into measurements.
ECHOS ingests the snapshots and events of a run, stores them (SQLite schema v6), then derives measurements: world viability, resource evolution, recurring patterns andfeedback loops.
Its output is consumable by other tools via a headless API: presentation is not its concern.
The benefit: separating observation from the engine prevents a measurement from rewriting history. ECHOS reads, stores and computes; it never modifies the simulated world.


Indicators, not judgments.
Viability
Energy, hunger, thirst, world survival over ticks.
Patterns
Recurring structures in space and time.
Loops
Feedbacks where one agent's behaviour influences the next.
Relationships
Interactions between agents, observed and aggregated.
Line coverage measured for ECHOS was 91.32% as of 19 October 2026.