Moment — DDD flow specifications

Syntax highlighting for Moment (.moment) specification files.

Moment is a DSL that translates Domain-Driven Design into temporal, event-storming flows: bounded contexts, aggregates, commands, events, sagas, policies, and flow lanes with branching, retries (returns-to), terminals, and cross-context contracts (crosses-to … via … contract).

Features

• Highlighting for all Moment keywords, including flow constructs (moment, lane, branch-lane, when, triggers, triggered-by, returns-to, crosses-to, via, contract) and saga transition event mappings (states Held -> Converting on PaymentConfirmed)
• String, comment (// and /* */), and escape-sequence scopes
• Bracket matching, comment toggling, and auto-closing pairs

The grammar is generated from the language's Langium definition in @mmmnt/core, so highlighting stays in lockstep with the parser.

Example

flow "N1 — A stranger books time with you"
  lane requestor "External Requestor"
  lane messaging "Messaging"

  moment "Cold sender throttled" [branch]
    when SenderWarmOrActive [messaging]
      messaging: ThrottleExempt
    when ColdSenderThrottled [refusals]
      refusals: RejectInboundMessage
      refusals: ThrottleNoticeSent
        returns-to "M1 · A request arrives"

Related tooling

• moment CLI — parse, validate, and generate simulation scenarios, topologies, Gherkin features, and AsyncAPI documents from .moment specs
• Facet — the replay/assertion harness that proves generated designs against their declared flows