Rule of law as institutional substrate — contract enforcement, judicial independence, equal treatment before the law. Upstream of most other axes.
Public Officers (Protection Against False Accusation) Decree No. 4 of 1984 criminalised publishing information that 'brings a public officer into ridicule or disrepute' regardless of truth. Journalists Tunde Thompson and Nduka Irabor jailed under it. Signalled broad press suppression characteristic of the Buhari-Idiagbon junta.
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.