The body grows. Its hidden control field learns to constrain growth.
Untouched bodies gained 0.198 radius units between q8 and q12. Yet the hidden q8→q12 displacement caused -0.033 [-0.042, -0.025] less later radius at +8 and -0.096 [-0.156, -0.043] at +96.
This is not a static marker of age. It behaves like a negative-feedback direction assembled during development.
The counterforce appears immediately and persists.
+8 steps
16/16 families contract.
+96 steps
The counterforce is about 49% of the natural q8→q12 radius gain.
+188 steps
13/16 families still point toward contraction.
Insert it at q8: contraction. Remove it at q12: expansion.
q8 body · q12 direction inserted
Forward minus reverse radius at +32, 95% [-0.078, -0.026].
q12 body · q12 direction removed
Forward minus reverse radius at +32 after reversing the transplant orientation.
Illustrative organism: flowing-spiral-2422, selected mechanically as closest to the cohort means for the +96 native vector and native-specific radius effects. Images are exact state patches and actual future frames. They are illustration, not evidence selection.
Hidden developmental time is not a timestamp.
The untouched q8 future at t+4 and untouched q12 future at t were byte-identical in every one of 12,032 comparisons. The reference clock is exact. But the hidden transplant did not carry the visible body four steps forward or backward along that clock.
Chronological transfer expected
q8→q12 hidden state should make q8 look older; q12→q8 should make q12 look younger.
Observed at +96
The native vector moved the visible clock slightly in the opposite direction; specificity versus scrambled was -2.19 [-3.58, -0.61].
The hidden state is better understood as a causal control field assembled through time—not a representation of elapsed time.
Development may create the constraints that keep an organism bounded.
As the seed opens into an organism, hidden composition differentiates. That differentiation becomes a signed, spatially specific force over the future body. Its direction opposes further expansion. This is exactly the kind of internal constraint one would expect from morphogenetic regulation or primitive homeostasis.
Not merely predictive
Ordinary predictive information fell during q8→q12, even as this causal direction strengthened.
Not merely correlated
We inserted and reversed the exact age displacement while keeping visible matter and global channel balance unchanged.
Not one family
The immediate radius effect aligned in all 16 families; the +96 effect aligned in 14/16.
Remove the brake and watch whether growth overshoots.
The decisive next test is a dose-and-release ablation at q12: cancel, preserve, or amplify the q8→q12 hidden direction, then follow the organism long enough to see whether it overshoots, destabilizes, or returns to a bounded body.
If canceling the field produces excess expansion while amplifying it produces controlled contraction—and the effect relaxes after release—we will have directly manipulated an internal morphogenetic feedback loop.