SPORT::Rugby (SPOS.RGB)
= repeatable match performance (collision competence × skill × decision × conditioning × team system execution)
  across training and fixtures,
  while keeping concussion and injury risk (head/neck/shoulder/knee) below threshold.
Output is “safe, reliable contribution under collision load” + “availability”.

P3
- tackle technique safe and stable under fatigue
- conditioning supports repeated collisions and high-speed running
- decision speed reliable; system roles clear
- concussion risk managed; injury time-loss low
- team cohesion stable under pressure
P2
- strong when fresh, technique breaks late (high-risk tackles)
- contact confidence fluctuates
- recurring shoulder/neck/knee soreness
- inconsistent system execution under fast play
P1
- frequent missed sessions due to injuries
- repeated head-impact symptoms risk; confidence issues
- poor tackle form under fatigue; penalty and injury rate rises
- system confusion; late-game collapse
P0
- significant concussion/neurological red flags or major injury
- cannot train/compete safely/reliably

Z1 collision load spike + Z0 poor recovery
→ Z0 tackle technique degrades under fatigue
→ Z0 head/neck/shoulder injury risk rises
→ Z2 missed sessions + fear/avoidance
→ P2 → P1 → P0 (concussion or major injury)
Repair: collision governance + tackle technique gating + recovery buffers + medical enforcement.

TIMEFLOW::COLLISION_TEAM_FUNCTION
T0–T1: mock combat + cohesion rituals; warrior conditioning
T2: folk games with mass contact; rivalry regulation
T3: codified rugby codes; clubs + schools; refereeing legitimacy
T4: professionalization + sport science + global competitions
T5: safety/regulation era: concussion protocols, tackle-height rules, load governance, safeguarding

RGB::Primitives
PR0 Tackle technique (head position, wrap, leg drive, finish)
PR1 Contact readiness (brace, fall skills, body control)
PR2 Ruck/contest skills (body position, decision legality)
PR3 Ball skills under pressure (catch-pass, offload, kick options)
PR4 Speed + repeat sprint ability (RSA) + fatigue tolerance
PR5 Strength base (neck/shoulders/hips) + tissue robustness
PR6 Decision speed (reads, spacing, defensive line integrity)
PR7 System roles (forwards/backs structures; set-piece execution)
PR8 Concussion governance + injury literacy + medical compliance
PR9 Team communication + trust under chaos

Z0::Top Failure Modes (Rugby)
FM0.RG1 high tackle with poor head position → concussion risk
FM0.RG2 fatigue → technique collapse in contact
FM0.RG3 weak neck/shoulder strength → injury risk rises
FM0.RG4 poor fall mechanics → wrist/shoulder/clavicle injuries
FM0.RG5 contact avoidance (fear) → unsafe late decisions
FM0.RG6 overtraining collisions (too many full-contact sessions)
FM0.RG7 hidden symptoms (headache, dizziness) ignored
FM0.RG8 discipline collapse at breakdown → penalties + stress
Z0::Sensor Pack (Minimum viable)
S0.RG1 collision dose: full-contact minutes/week + tackle counts proxy
S0.RG2 head-impact symptom check (daily quick screen)
S0.RG3 pain map: neck/shoulder/knee/ankle (0–10) + stiffness
S0.RG4 tackle technique score (coach/video)
S0.RG5 fatigue score + sleep hours
S0.RG6 late-game errors/penalties trend
S0.RG7 confidence index in contact (0–10)
Z0::Repairs
R0.RG1 tackle school: low tackle mechanics + head-safe positioning
R0.RG2 fatigue-proofing: technique reps late in session at controlled intensity
R0.RG3 neck/shoulder strength + posterior chain 2–3×/week
R0.RG4 fall/landing skills training
R0.RG5 graded contact exposure to rebuild confidence safely
R0.RG6 collision governance: cap full-contact; more technique-contact than war contact
R0.RG7 medical gate: symptom → stop → evaluate → return ladder
R0.RG8 breakdown decision rules: legality + body height discipline

Z1::Failure Modes
FM1.RG1 culture glorifies heavy hits over safe technique
FM1.RG2 too many contact sessions + insufficient recovery
FM1.RG3 unclear defensive system cues → panic tackles
FM1.RG4 rushed return-to-play after head knocks
FM1.RG5 mismatch in training partners (size/skill)
Z1::Sensors
S1.RG1 injury/concussion incidents relative to contact dose
S1.RG2 tackle technique breakdown rate under fatigue
S1.RG3 penalty count at breakdown + tackle height penalties
S1.RG4 late-game defensive line breaks frequency
S1.RG5 adherence to medical return protocols
Z1::Repairs
R1.RG1 tackle technique gates + head-safe standards
R1.RG2 contact periodization: technique-contact > full-contact; deload weeks
R1.RG3 system simplification: 2–3 defensive cues only
R1.RG4 strict concussion SOP + independent clearance
R1.RG5 safe pairing rules (size/intent bands)

Z2::Failure Modes
FM2.RG1 youth exposed to excessive contact early
FM2.RG2 safeguarding gaps; pressure to play injured
FM2.RG3 inadequate strength base development
FM2.RG4 limited medical integration
Z2::Sensors
S2.RG1 youth concussion/head-injury incidence
S2.RG2 dropout/burnout rate
S2.RG3 injury days lost (shoulder/knee)
S2.RG4 contact dose compliance with age standards
Z2::Repairs
R2.RG1 youth contact policy: skill + tackle technique first, limited contact
R2.RG2 safeguarding + reporting channels + health-first norms
R2.RG3 minimum strength/movement prep standards
R2.RG4 medical integration: baseline checks + clearance governance

Z3::Failure Modes
FM3.RG1 scheduling congestion increases collision fatigue
FM3.RG2 officiating inconsistency on tackle height/breakdown safety
FM3.RG3 incentives reward violence over safety
Z3::Sensors
S3.RG1 concussion trends and severity outcomes
S3.RG2 tackle-height penalty trends (proxy for risk)
S3.RG3 injury incidents in congested windows
Z3::Repairs
R3.RG1 schedule caps + rest windows
R3.RG2 referee calibration + safety enforcement
R3.RG3 rule evolution for head safety + education programs

STATE::RUGBY
- CollisionDose CD = full-contact minutes + tackle count proxy
- HeadRisk HR = symptom flags + head-knock incidents
- Technique T = tackle technique score under fatigue
- InjuryRisk IR = neck/shoulder/knee pain trend
- SystemExec SE = line integrity + breakdown penalties + transition errors
- Recovery Rec = sleep + fatigue trend
- Confidence C = contact confidence index
Phase Estimator:
IF CD governed AND HR low AND T stable AND SE improving → P3 drift
IF HR rising OR CD spikes OR T collapses late-game → P2/P1 warning
IF concussion/major injury stops play or medical red flags → P0 risk

Trigger: any symptom or suspected head impact with red flags
1) remove from play immediately
2) medical evaluation; follow return-to-play ladder strictly
3) no same-day return
4) re-entry only when symptom-free and cleared
5) long-term: reduce contact dose + reinforce head-safe tackling

1) reduce collision intensity temporarily; focus on technique reps
2) rebuild low tackle position + head placement + wrap/drive
3) fatigue-proofing: technique reps late in session at controlled intensity
4) simplify decision cues to reduce panic tackles
5) reintroduce full contact with strict caps and monitoring

Trigger: pain trend rising >7 days or repeated stingers
1) reduce contact; adjust training role temporarily
2) strengthen: neck isometrics + scapular stability + posterior chain
3) improve fall mechanics and tackle entry angles
4) gradual return to contact with gates
5) audit: contact dose, recovery, pairing mismatches

CivOS Link:
- Rugby is “controlled violence with governance”:
  it tests whether a system can coordinate safety, roles, and high-risk behavior under pressure.
- Brittleness risk: macho culture + weak concussion enforcement → hidden fragility → irreversible harm.
- Repair: strict medical governance, contact load caps, and technique-first pipelines.