FenceOS v1.0 — Expansion H: Stop-Loss Policy + Threshold Bands + Hysteresis (Almost-Code)

H0) Goal

FenceOS needs an explicit “when do we act” policy that is:

simple enough to run everywhere
strict enough to prevent late fences
stable enough to avoid oscillation (open/close/open/close)

This is the stop-loss + bands + hysteresis layer.

H1) Core Ratios (recap, LOCK)

For any lane $L$ L:

$R = \dot{D} / \dot{G}$ R=D˙/G˙ (rate dominance)
$T T C = B / (- \dot{B})$ TTC=B/(−B˙)
$Θ = T T C / T_{r e p a i r}$ Θ=TTC/Trepair (repair margin)
$Λ = T_{e n f o r c e} / T T C$ Λ=Tenforce/TTC (late-fence risk)

Trigger baseline (LOCK): TRUNCATE if $R > 1$ R>1 OR $Θ < 1$ Θ<1 OR $Λ \geq 1$ Λ≥1.

H2) Threshold Bands (Green / Amber / Red)

FenceOS uses bands (not just single cut-offs) to avoid noise and allow graded response.

H2.1 Band definitions (generic defaults)

These are lane-agnostic defaults; tune per lane later.

Rate dominance $R$ R

Green: $R \leq 0.8$ R≤0.8
Amber: $0.8 < R \leq 1.0$ 0.8<R≤1.0
Red: $R > 1.0$ R>1.0

Repair margin $Θ$ Θ

Green: $Θ \geq 1.5$ Θ≥1.5
Amber: $1.0 \leq Θ < 1.5$ 1.0≤Θ<1.5
Red: $Θ < 1.0$ Θ<1.0

Late-fence $Λ$ Λ

Green: $Λ \leq 0.7$ Λ≤0.7
Amber: $0.7 < Λ < 1.0$ 0.7<Λ<1.0
Red: $Λ \geq 1.0$ Λ≥1.0

Interpretation:

Green = safe band
Amber = fence prep + coupling reduction
Red = stop-loss (truncate)

H3) Stop-Loss Policy (what FenceOS must do in Red)

Stop-Loss Rule (LOCK):
If any metric is Red (R OR Θ OR Λ), FenceOS must output:

TRUNCATE (stop runaway regime)
HARD or SOFT fence (depending on lane and severity)
REROUTE/DECOUPLE (reduce contagion)
REPAIR MODE (all actions now serve repair completion)

FenceOS never “waits for more data” when Red.

H4) Graded Response by Band (action mapping)

H4.1 All metrics Green

Action:

RELAX (but keep sensors on)
rebuild buffers proactively (maintenance / training / reserves)

H4.2 Any metric Amber (none Red)

Action:

SOFT fences tighten (increase friction)
REROUTE/DECOUPLE (reduce coupling)
begin repair pipeline early (pre-repair)
prepare for hard fence if trend continues

This is “early truncation without panic.”

H4.3 Any metric Red

Action:

TRUNCATE + HARD (or strongest available)
lock SOP / freeze churn
full repair protocol activated

H5) Hysteresis (anti-oscillation rule)

Without hysteresis, systems do this:

fence triggers → improves → fence relaxes → relapses → fence triggers again

Hysteresis fixes that by requiring extra recovery before relaxing.

H5.1 Hysteresis rule (LOCK)

To relax from Red/Amber back to Green, require:

metrics Green for window WW
buffer rebuilt above a higher re-open threshold:

$B (t) \geq B_{min} + Δ B_{hyst}$ B(t)≥Bmin+ΔBhyst

Where $Δ B_{hyst}$ ΔBhyst is the “extra buffer” needed before reopening.

Practical meaning: don’t reopen just because it stopped getting worse.Practical meaning: don’t reopen just because it stopped getting worse.

H6) Trend override (acceleration detector)

FenceOS must also detect when you’re accelerating toward the fence even if absolute levels look okay.

Define: $a_{B} (t) = \frac{d \dot{B}}{d t}$ aB(t)=dtdB˙

If $a_{B}$ aB is strongly negative (erosion is accelerating), upgrade response by one band:

Green → Amber
Amber → Red

This captures “sudden cliff approach.”

H7) Anti-gaming & Fake Recovery Protection

FenceOS must treat certain improvements as “fake recovery” if they do not rebuild buffers.

Fake recovery indicators (examples):

reported compliance increases but incidents don’t drop
test scores rise but transfer reliability remains weak (EDU)
volatility pauses but liquidity continues draining (FIN)
discourse quiets but mediator legitimacy not restored (NIT)

Rule:

Do not relax fences unless buffer $B$ B rebuilds and R < 1 is sustained.

H8) Place×Lane×Zoom Policy Block (copy-paste)

			
FenceOS.Policy.v1.0
Inputs:
  R = Ddot/Gdot
  TTC = B/(-dBdt)
  Theta = TTC/Trepair
  Lambda = Tenforce/TTC
  aB = d(dBdt)/dt
Bands:
  R: Green<=0.8, Amber(0.8..1.0], Red>1.0
  Theta: Green>=1.5, Amber[1.0..1.5), Red<1.0
  Lambda: Green<=0.7, Amber(0.7..1.0), Red>=1.0
Actions:
  if any Red -> TRUNCATE + (HARD/STRONG) + REROUTE + REPAIR_MODE
  else if any Amber -> SOFT_TIGHTEN + DECOUPLE + PRE_REPAIR
  else -> RELAX + BUFFER_BUILD
Hysteresis:
  Relax only if all Green for window W AND B >= Bmin + dB_hyst
Trend override:
  if aB << 0 (erosion accelerating) -> upgrade band by 1

		

H9) Failure Mode Trace (stop-loss missing)

Metrics enter Amber → no soft fences → coupling remains high → erosion accelerates → TTC collapses → Red arrives suddenly → enforcement lags (Λ≥1) → late hard fence → overshoot damage → long repair time constant → repeated cycles

Stop-loss + hysteresis prevents this exact pattern.

H10) FenceOS v1.0 completeness check (now complete)

You now have:

Core definition + variables + ratios
Plug-ins A–D (EDU, GOV, NIT, CITY/FIN/INFRA)
Router + coupling matrix
War/Crime downstream mapping
Sensorization spec
Threshold bands + stop-loss + hysteresis

That is a full FenceOS v1.0 executable spec layer.

FenceOS v1.0 — Expansion H: Stop-Loss Policy + Threshold Bands + Hysteresis (Almost-Code)

H0) Goal

H1) Core Ratios (recap, LOCK)

H2) Threshold Bands (Green / Amber / Red)

H2.1 Band definitions (generic defaults)

Rate dominance RR

Repair margin ΘΘ

Late-fence ΛΛ

H3) Stop-Loss Policy (what FenceOS must do in Red)

H4) Graded Response by Band (action mapping)

H4.1 All metrics Green

H4.2 Any metric Amber (none Red)

H4.3 Any metric Red

H5) Hysteresis (anti-oscillation rule)

H5.1 Hysteresis rule (LOCK)

H6) Trend override (acceleration detector)

H7) Anti-gaming & Fake Recovery Protection

H8) Place×Lane×Zoom Policy Block (copy-paste)

H9) Failure Mode Trace (stop-loss missing)

H10) FenceOS v1.0 completeness check (now complete)

Recommended Internal Links (Spine)

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Rate dominance $R$ R

Repair margin $Θ$ Θ

Late-fence $Λ$ Λ