Rule of law as institutional substrate — contract enforcement, judicial independence, equal treatment before the law. Upstream of most other axes.
Loi n° 2013-404 du 17 mai 2013 ouvrant le mariage aux couples de personnes de même sexe. Opened civil marriage and joint adoption to same-sex couples. Not a direct economic-axis policy but a signature Hollande-presidency content item used here to place the movement on the social-liberal dimension alongside its economic content.
Per invariant 3, reforms are scored by what they did on each channel-separated axis, not by the party that enacted them. This fingerprint is how the policy-match engine finds historical analogues.
Explicit links are curated by the author. Inferred links are hypotheses in the library that test the same axes this policy moved — the framework's answer to "what does the data say about a policy like this?".
Ranked by axis-fingerprint overlap with this policy. Direction match bolded — those are the closest historical analogues. Shape of the match is what drives policy-outcome comparison, not the country or party label.