name: ale_agent
display_name: ALE-Agent
organization: SakanaAI
type: test_time_search
family: search_baseline
summary: "Domain-guided tabu best-first search with 30 sibling branches and three-turn solution refinement."
source: "ALE-Bench: A Benchmark for Long-Horizon Objective-Driven Algorithm Engineering (NeurIPS 2025)"
tags: [ale-bench, algorithm-engineering, best-first, domain-guidance, inference-time-scaling]
license: Apache-2.0
controller: galapagos.scaffolds.ale_agent.scaffold.ALEAgentScaffold
components:
  population: {kind: best_first_archive}
  selection_policy: {kind: tabu_batched_best_first}
  prompt_builder: {kind: ale_domain_guided}
  proposer: {kind: multi_turn_full_rewrite}
  evaluator: {kind: task}
  memory: {kind: search_trajectory_summary}
model:
  default: google/gemini-2.5-pro
  host: openrouter
examples:
  - "galapagos run --scaffold ale_agent --task ahc039 --general.max_iterations 100"