v0.116.3

• Store docs authoritative: state doc loader no longer falls back to builtins; prompt docs required for summarize/analyze (raise on missing)
• Dynamic prompts must have state tag: {get}/{find} without state tag is an error
• Prompt rendering via state-doc flows with binding expansion
• state-get.md extended with item + find_results bindings for prompt compatibility
• keep get now and keep put --id now "text" unified with keep now behavior