The sanctioned last architectural building block. Reverses the order: not Goal -> Journey -> Delta
but Goal -> Required -> Delta -> Journey. A Journey is the EXPLANATION of the Capability Delta, not
its cause — so this is a Matcher/Explainer, not a Selector.
New module compliance/journey_matcher/ = the third independent, interchangeable function of the
pipeline, beside Company 2A (Evidence -> Capability) and RS-005 (Capability -> Delta):
match_journeys(delta, journeys, context) -> ranked, auditable explanation
- Looks ONLY at the Capability Delta — never at certificates, regulation, tenders or the goal.
Journey signatures are certificate-agnostic capability clusters (Input -> Output pattern).
- score = share of the delta a journey explains (recall over the missing capabilities); journey_only
documents where a journey reaches beyond the delta so a broad journey is not silently preferred.
- Deliberately dumb + deterministic (pure set overlap; NO ML/embeddings/LLM), fully auditable
(matched / unexplained / journey_only / context signals); a learning ranker can sit on top later.
- Signatures injected, engine hermetic. mypy --strict clean.
Validated on the real patterns (demo): a CRA+MaschinenVO delta ranks the convergence journey 100%,
"ISO27001 -> CRA" 56% (misses the machine-safety caps), "ISMS -> TISAX" 0%. This resolves the
"Scope -> Journey" jump from Customer Mission #1. Freeze exception explicitly authorised; non-runtime
-> no deploy. 12 tests pass, check-loc 0.
Benjamin Admin
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