ACEPlaybookFeature

ACE-specific feature that appends playbook content to the agent's system prompt at strategy start.

Unlike ai.koog.agents.optimization.features.PromptOptimizationFeature which replaces the system message, this feature preserves the original system prompt and appends the playbook after it. This is necessary because the original system prompt contains task-specific instructions that must be preserved.

Per-subgraph playbook content is handled separately via ai.koog.agents.optimization.core.OptimizationArtifact.subgraphInstructions, baked in at save time and applied by ai.koog.agents.optimization.features.PromptOptimizationFeature.

Composable with other features:

agent.copyWith(installFeatures = {
    agent.installFeatures(this)
    installACEPlaybook { playbook = loadedPlaybook }
    installPromptOptimization { artifact = perSubgraphArtifact }
})