490d C335 — Two-year coordinate directions and held endpoints
24 September2026. Step2 of10 in the C334–C343 authorization.
The two displayed +2 choices move their underlying BC bases in opposite directions. They are equal changes in the mixed comparison coordinates, not a demonstrated common source-state motion.
Use the inherited order (S,q,R,n): cumulative ON-Shem, cumulative OFF-Flood, reflected restored-MT Flood, reflected SP Noah. Converting changes back to BC magnitudes reverses the first two signs and retains the last two. This is a statement about the stored comparison coordinates, not a new civil-year-zero convention.
| Choice | Change in (S,q,R,n) | Change in underlying BC bases | Effect |
|---|---|---|---|
| a:0→2 | (2,0,0,0) | (−2,0,0,0) | ON-Shem moves later; left short span shrinks by2 |
| b:0→2 | (0,0,2,0) | (0,0,2,0) | MT Flood moves earlier; right short span shrinks by2 |
| both | (2,0,2,0) | (−2,0,2,0) | S→R stays17K; both short spans1060→1058 |
All twelve single-choice transitions with both ends source-admitted were checked, together with both inherited quarter-year components. The three admissible 00→22 transitions are i3,i4,i5. At i6,i7, the required upper cumulative/regular states remain unavailable; they were not created to complete the pattern.
C334's opposite father/son source directions do not themselves prove this pairing: the endpoints here are cumulative Shem and regular Flood, with different profiles and output conventions. Nor does holding q and n invalidate the comparison. It does mean that the comparison must not be called a whole-chain or whole-biography motion without explicitly tracking the other source endpoints.
The next question is therefore a lift to complete, already admitted source pairs: what happens when the cumulative partner and the regular Noah partner move coherently with the selected Shem and Flood?
Verification and limits
59 main checks and 16 frozen-input/predecessor authentication checks passed. A second main replay produced byte-identical DATA/RESULTS. These checks and the source interpretation were performed by the root agent; no new independent-agent review is claimed. All frozen originals and standing controls remain unchanged. Verification counts are not independent-witness counts.
Only C319 admitted transitions and inherited phases are tested. Common origin is retained; no equation of differently typed source operations is inferred.
Mirror/529 focus: K=529, E=25/23, P=70/69. Global paired Mirror January AD1; local junction January AD2; no civil year zero. Regular Gears are Noah/Shem/Flood only. SP minus-one person companions remain local to SP Noah/Shem; Flood close is a separate boundary. No upstream/cumulative Gear, new endpoint or phase, fitted anchor, global axis, primer reopening, canonical or graph edit. Capture now; canonize later. Source identity, context, modal binding, generated coordinates and phase ancestry stay distinct.
Decision after this result
C336, proposed and unexecuted: Lift each endpoint choice to its complete existing source pair: cumulative ON-Shem/ON-Flood at one annual index, and restored MT Noah/Flood at one Gear. Track the companions that a coherent operation moves, keeping all existing source domains fixed.
The sign audit resolves one ambiguity but leaves scope unresolved. Checking complete source pairs will distinguish a valid cross-profile endpoint selection from a whole-source motion.