The first round of US-Iran talks in Islamabad (approximately April 11–15, 2026) will NOT produce a publicly announced joint communiqué, agreed negotiating framework, or explicit agenda document for nuclear/sanctions discussions by April 15, 2026. The publicly observable outcome will be, at most, a vague procedural statement ('constructive atmosphere; parties agreed to continue') that avoids committing either side to a specific agenda, timeline, or negotiating framework.

All four frameworks converge on the same directional prediction via independent causal pathways — a strong signal under the multi-lens method. The Marxist lens identifies material class interests (IRGC rent-dependency on sanctions architecture; US finance-capital hegemony demands requiring total compliance rather than negotiated détente) that make binding nuclear/sanctions agendas structurally costly to both ruling classes. The Austrian lens identifies the knowledge problem and time-preference asymmetry: the US side’s high time-preference generates pressure for a cosmetic communiqué that harvests signaling value without substantive coordination; Iran’s lower time-preference enables strategic ambiguity that preserves optionality. The Keynesian lens identifies liquidity preference under Knightian uncertainty — both delegations refuse to collapse optionality through public commitments when the domestic-political cost of being bound to an explicit agenda is unquantifiable in a four-day window. The Institutionalist lens identifies path-dependence lock-in and veto-player density (IRGC hardliners, US Congressional hawks, Israeli pressure) raising transaction costs of any explicit framework to prohibitive levels within this timeframe. The historical base rate for first-round talks between adversarial nuclear parties producing a substantive public framework in under five days is approximately 15%. Multi-framework convergence on NO, combined with absence of any credible override mechanism capable of simultaneously neutralizing all four independent barriers, justifies confidence of approximately 0.78 that no substantive communiqué emerges. The main residual uncertainty is definitional: a deliberately vague document that nominally names nuclear and sanctions issues could technically satisfy the question’s ‘explicit agenda’ criterion while containing no binding content — this edge case is the primary driver of uncertainty and prevents confidence above 0.80.