Guide DCB pattern and AppendCondition choices for spring-crablet command handlers.
npx skills add https://github.com/rodolfodpk/spring-crablet --skill crablet-dcb
Please help me install this Agent Skill. Skill: crablet-dcb Source: https://github.com/rodolfodpk/spring-crablet/tree/main/.claude/skills/crablet-dcb Command: npx skills add https://github.com/rodolfodpk/spring-crablet --skill crablet-dcb
This skill provides guidance on the DCB (Dynamic Consistency Boundary) pattern, helping users choose the right AppendCondition, diagnose idempotency issues, and design consistency boundaries for new features within the spring-crablet framework.
Analyze the consistency boundary for the 'createOrder' command by providing the command handler and scenario details.
High-intent search queries and answers about installing and using this skill.
A dynamic consistency boundary defines the specific events a command handler scans to enforce invariants before appending new events, ensuring state consistency in event-sourced systems without locking entire aggregates.
Design consistency checks by mapping command invariants to a DCB pattern and selecting an appropriate AppendCondition. Use the decision model to determine whether cursor-based checks validate your non-commutative operations correctly.
You need non-commutative consistency checks when command processing depends on prior events and operation order affects the outcome. This prevents invalid state transitions when appending events conditionally based on existing state.
Choose an AppendCondition by analyzing your DCB pattern to determine if the command requires validating against a specific event sequence. The decision model maps your consistency requirements to append-only or cursor-based condition types.
Idempotency issues often arise from incorrectly scoped dynamic consistency boundaries or inappropriate AppendCondition choices. Diagnosing the DCB pattern verifies that your command handler reads the correct event history to identify duplicate commands.
Yes, cursor-based checks are supported for Java event-sourced applications using the spring-crablet framework. This approach allows command handlers to validate invariants by reading a specific event stream slice defined by the DCB pattern.
AI-Foundry-CoreApply CQRS to separate read and write models with commands, queries, and projections.
rodolfodpkManage Spring-crablet framework updates, internal APIs, and event store operations.
rodolfodpkDesign Spring Crablet event models through a structured workshop.
doanchienthangdevExplain CQRS patterns for separating read and write models.
