[SITE]
Domain: bukittimahtutor.com
Place:  SGP.SG.BT
Lane:   EDU.MATH.SEC34 (E-Math)
Role:   Repair Router (Truncation + Stitching)
Zoom:   Z0–Z3
v:      v1.0

[NODE]
SGP.SG.BT×EDU.MATH.SEC34×Z3×V×LOCK×BTT.SEC34.PURPOSE×v1.0:
  txt: "Sec 3–4 E-Math is a transfer-and-time exam. BTT restores stable flight by repairing transfer, error loops, and time control before adding speed."
[EDGE]
binds_to:
  SGP.SG.BT×EDU.EXAM×Z3×R×PROTOCOL×BTT.EXAM.ROUTE×v1.0
  SGP.SG.BT×EDU.MATH×Z3×S×PHASE×P0P3.MATH×v1.0

[NODE]
SGP.SG.BT×EDU.MATH.SEC34×Z1×L×PRIM×SEC34.MULTI_STEP_CHAIN_CONTROL×v1.0:
  def: "execute long multi-step chains with low error accumulation"
[NODE]
SGP.SG.BT×EDU.MATH.SEC34×Z2×L×PRIM×SEC34.METHOD_SELECTION×v1.0:
  def: "choose correct method under mixed-topic variation"
[NODE]
SGP.SG.BT×EDU.MATH.SEC34×Z2×L×PRIM×SEC34.TRANSFER_VARIATION×v1.0:
  def: "apply principles when question format changes"
[NODE]
SGP.SG.BT×EDU.MATH.SEC34×Z1×L×PRIM×SEC34.ERROR_LOOP_STABILITY×v1.0:
  def: "detect + localise errors fast enough to prevent time collapse"
[NODE]
SGP.SG.BT×EDU.MATH.SEC34×Z2×L×PRIM×SEC34.TIME_BUDGETING×v1.0:
  def: "allocate time per question; avoid end-collapse"
[NODE]
SGP.SG.BT×EDU.MATH.SEC34×Z2×L×PRIM×SEC34.STRESS_STABILITY×v1.0:
  def: "stay cognitively stable under exam stakes"

[NODE]
SGP.SG.BT×EDU.MATH.SEC34×Z3×S×PHASE×P0P3.SEC34×v1.0:
  P3:
    - "selects method correctly on mixed papers"
    - "low error accumulation on long chains"
    - "stable under time; finishes"
    - "recovers fast after slips"
  P2:
    - "strong in topical practice"
    - "brittle on mixed papers; wrong method occasionally"
    - "time pressure creates careless errors"
  P1:
    - "partial competence; high variance"
    - "panic under time; end-collapse common"
    - "error loop externalised"
  P0:
    - "blanking; avoidance; shutdown"

[NODE]
SGP.SG.BT×EDU.MATH.SEC34×Z3×R×TRACE×BTT.SEC34.FAILURE_MODE×v1.0:
  chain:
    - "Z1: long-chain errors accumulate (weak chain control)"
    - "Z2: mixed-topic variation → wrong method selection"
    - "Z2: transfer break → stuck mid-paper"
    - "Z2: time budgeting fails → end-collapse"
    - "Z2: stress spike → careless errors + blanking"
  phase_drift:
    - "P2 topical illusion → P1 mixed-paper fragility → P0 under high stakes"
  repair_route:
    - "truncate speed → rebuild method selection + transfer ladder → rebuild error loop → rebuild time budget → reintroduce speed last"

[NODE]
SGP.SG.BT×EDU.MATH.SEC34×Z2×R×TRACE×BTT.SEC34.CLUSTER.WRONG_METHOD×v1.0:
  symptoms:
    - "solves using wrong topic"
    - "cannot see which chapter applies"
  root:
    - "method selection + principle extraction missing"
  fix:
    - "method-selection keys + mixed-topic sorting + principle-first training"

[NODE]
SGP.SG.BT×EDU.MATH.SEC34×Z1×R×TRACE×BTT.SEC34.CLUSTER.LONG_CHAIN_BLEED×v1.0:
  symptoms:
    - "small slip ruins whole question"
    - "algebra mistakes mid-way"
  root:
    - "error localisation too slow; chain control weak"
  fix:
    - "checkpointing + micro-verification + fast localisation scripts"

[NODE]
SGP.SG.BT×EDU.MATH.SEC34×Z2×R×TRACE×BTT.SEC34.CLUSTER.END_COLLAPSE×v1.0:
  symptoms:
    - "rushes last 20 minutes"
    - "leaves questions blank"
  root:
    - "time budgeting missing; stress stability weak"
  fix:
    - "time allocation protocol + controlled timed sets + speed-last"

[NODE]
SGP.SG.BT×EDU.MATH.SEC34×Z2×R×TRACE×BTT.SEC34.CLUSTER.CARELESS_UNDER_TIME×v1.0:
  symptoms:
    - "careless errors appear only in tests"
  root:
    - "S0 precision collapses under load; stability weak"
  fix:
    - "precision rituals under mild time; load shaping"

[NODE]
SGP.SG.BT×EDU.MATH.SEC34×Z3×R×PROTOCOL×BTT.SEC34.REPAIR×v1.0:
  TRUNCATE:
    - "stop full-paper timed drills temporarily"
    - "remove speed pressure; restore confidence via control"
  REBUILD_1 METHOD SELECTION:
    - "mixed-topic sorting"
    - "principle extraction"
    - "method keys (what this question is really asking)"
  REBUILD_2 TRANSFER LADDER:
    - "controlled variations"
    - "twist question training"
  REBUILD_3 ERROR LOOP + CHAIN CONTROL:
    - "checkpointing"
    - "fast error localisation"
    - "micro-verification scripts"
  REBUILD_4 TIME BUDGET:
    - "time allocation per question"
    - "skip/return strategy"
    - "end-collapse prevention"
  STABILITY:
    - "panic prevention"
    - "recovery after slip"
    - "confidence via competence"
  SPEED LAST:
    - "increase pace only after variance is low"

[NODE]
SGP.SG.BT×EDU.MATH.SEC34×Z2×R×METRIC×BTT.SEC34.SENSOR.METHOD_ERROR×v1.0:
  def: "wrong-method chosen rate on mixed questions"
[NODE]
SGP.SG.BT×EDU.MATH.SEC34×Z1×R×METRIC×BTT.SEC34.SENSOR.CHAIN_BLEED×v1.0:
  def: "probability a small slip ruins the whole solution"
[NODE]
SGP.SG.BT×EDU.MATH.SEC34×Z2×R×METRIC×BTT.SEC34.SENSOR.END_COLLAPSE×v1.0:
  def: "accuracy drop / blanks in last segment"
[NODE]
SGP.SG.BT×EDU.MATH.SEC34×Z2×R×METRIC×BTT.SEC34.SENSOR.CARELESS_UNDER_TIME×v1.0:
  def: "careless error rate increase under timed load"

[NODE]
SGP.SG.BT×EDU.MATH.SEC34×Z3×V×LOCK×BTT.SEC34.A1_MEANING×v1.0:
  txt: "Sec 3–4 A1 means P3: robust method selection + transfer + low error bleed + stable time control."

[LOCKBLOCK:BTT.SEC34_MATH.v1.0]
Sec 3–4 E-Math is mixed-paper transfer + time control.
BTT repairs: truncate timed overload → method selection → transfer ladder → error loop+chain control → time budget → stability → speed last.
Target: P3 (robust under mixed papers), not P2 topical illusion.