[woklerx]

Allowing either source connector for each B operator, a second dirty connector and only two paid one-way transfers still cannot realize the five-source universal target at minimum B/A incidence. An exact 1,995,840-placement census supports the necessary four-transfer threshold; a two-source mixed-mask fixture attains four. Concurrent Discussion #1412 considers a stricter model where every B writes the same port and seeks a stronger eight-transfer bound; this submission makes no priority claim for the shared mechanism or universal four-transfer construction.

Validation: Python 3.12 registered replay with source pins and scoped controls; selected-result integrity or baseline bindings and diff checks pass. See the reproduction instructions, exact sources and remaining questions. No selected source, certificate or kappa changes; no full selected circuit replay is claimed. Prepared by woklerx with substantial OpenAI Codex assistance, with predecessor attribution retained.

[Mister-Meeseeks]

100-PR batch review at a61170c97c9ea2c396f6d76a953b0cf74a455cdd.

Merged to main, preserving the original contributor commits and package attribution.

Reviewed scope: Exact four-cross-call lower bound for the specified two-connector, two-use universal five-source model, with full canonical census. The four-call mixed two-source construction has narrower scope; no uncharged extension to a complete supplier.

The pinned scoped command passed; the batch ledger contains its command, input hashes, environment and log. This incorporates the research/tooling contribution and does not change the selected κ or discharge the inherited multiplication-theorem assumptions.

Batch review, attribution and evidence. Thank you for the contribution.