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

[NODE]
SGP.SG.BT×EDU.MATH×Z3×V×LOCK×BTT.MATH.PURPOSE×v1.0:
  txt: "BukitTimahTutor repairs mathematics capability by rebuilding symbol decoding, representation, error loops, and transfer—then reintroducing speed."
[EDGE]
binds_to:
  SGP.SG.BT×EDU×Z3×R×PROTOCOL×BTT.REPAIR_ROUTING×v1.0
  Z*×EDU×Z3×S×STACK×STUDY.SKILLS×v1.0

[NODE]
SGP.SG.BT×EDU.MATH×Z0×L×PRIM×MATH.SYMBOL_SYSTEM×v1.0:
  def: "ability to decode and manipulate symbols (notation, operators, equality, functions)"
[NODE]
SGP.SG.BT×EDU.MATH×Z0×L×PRIM×MATH.REPRESENTATION×v1.0:
  def: "ability to hold a mental model of quantity/structure (not just steps)"
[NODE]
SGP.SG.BT×EDU.MATH×Z1×L×PRIM×MATH.ERROR_LOOP×v1.0:
  def: "ability to detect, locate, and correct errors independently"
[NODE]
SGP.SG.BT×EDU.MATH×Z2×L×PRIM×MATH.TRANSFER×v1.0:
  def: "ability to apply principles under variation (twist questions)"
[NODE]
SGP.SG.BT×EDU.MATH×Z2×L×PRIM×MATH.TIME_CONTROL×v1.0:
  def: "ability to execute within time constraints without collapse"

[NODE]
SGP.SG.BT×EDU.MATH×Z3×S×PHASE×P0P3.MATH×v1.0:
  P3:
    - "solves novel questions; explains reasoning; self-corrects; stable under time"
  P2:
    - "solves standard forms; brittle under twist/time; error loop partly external"
  P1:
    - "cram works short term; frequent slips; panic under time; high variance"
  P0:
    - "shutdown; cannot start; avoidance; identity damage around math"

[NODE]
SGP.SG.BT×EDU.MATH×Z3×R×TRACE×BTT.MATH.FAILURE_MODE×v1.0:
  chain:
    - "Z0: weak symbol decoding (e.g., '=' treated as 'do something')"
    - "Z0: steps memorised without representation"
    - "Z1: error loop externalised (needs teacher to find mistakes)"
    - "Z2: transfer breaks under variation"
    - "Z2: time collapse → panic → blanking"
  phase_drift:
    - "P2 → P1 → P0 under acceleration mismatch"
  repair_route:
    - "reduce speed + rebuild primitives → restore transfer → add time last → P1→P2→P3"

[NODE]
SGP.SG.BT×EDU.MATH×Z3×S×MODULE×MATH.PSLE.LOAD_JUMP×v1.0:
  load_changes:
    - "multi-step reasoning"
    - "model drawing / representation demands"
    - "time-pressure accuracy"
  common_breaks:
    - "representation gap"
    - "error-repeat loops"
  output_if_unrepaired:
    - "careless cluster becomes chronic"

[NODE]
SGP.SG.BT×EDU.MATH×Z3×S×MODULE×MATH.SEC12.LOAD_JUMP×v1.0:
  load_changes:
    - "algebraic symbolism"
    - "equations/inequalities"
    - "structured problem writing"
  common_breaks:
    - "symbol system weak → nonsense manipulation"
    - "cannot start questions independently"

[NODE]
SGP.SG.BT×EDU.MATH×Z3×S×MODULE×MATH.SEC34_AMATH.LOAD_JUMP×v1.0:
  load_changes:
    - "functions, graphs, transformations"
    - "proof-like reasoning / identity manipulation"
    - "higher time compression"
  common_breaks:
    - "transfer collapse under variation"
    - "time-control collapse"
  risk:
    - "P2 brittle → P1 panic under exams"

[NODE]
SGP.SG.BT×EDU.MATH×Z0×R×TRACE×BTT.MATH.CLUSTER.ACCURACY×v1.0:
  symptoms:
    - "sign errors"
    - "copying errors"
    - "missed constraints"
  root:
    - "S0 input + S3 error loop weak"
  fix:
    - "precision rituals + error localisation training"

[NODE]
SGP.SG.BT×EDU.MATH×Z0×R×TRACE×BTT.MATH.CLUSTER.CANNOT_START×v1.0:
  symptoms:
    - "stares at question"
    - "waits for hints"
  root:
    - "representation gap + decomposition gap"
  fix:
    - "starter templates + decomposition drills"

[NODE]
SGP.SG.BT×EDU.MATH×Z2×R×TRACE×BTT.MATH.CLUSTER.TRANSFER_BREAK×v1.0:
  symptoms:
    - "can do drills, fails unfamiliar"
  root:
    - "principle extraction missing"
  fix:
    - "variation ladder + principle-first training"

[NODE]
SGP.SG.BT×EDU.MATH×Z2×R×TRACE×BTT.MATH.CLUSTER.TIME_COLLAPSE×v1.0:
  symptoms:
    - "slow"
    - "panic"
    - "blanking"
  root:
    - "meta-control + stability weak; acceleration mismatch"
  fix:
    - "time budgeting + staged speed reintroduction"

[NODE]
SGP.SG.BT×EDU.MATH×Z3×R×PROTOCOL×BTT.MATH.REPAIR×v1.0:
  Step0 TRUNCATE:
    - "stop runaway workload; remove speed pressure"
    - "prevent identity damage: 'math failure' → 'missing primitive'"
  Step1 S0 SYMBOL + INPUT:
    - "decode notation"
    - "read constraints precisely"
    - "units/labels discipline"
  Step2 S1 REPRESENTATION:
    - "build mental model"
    - "derive steps from meaning, not memory"
  Step3 S3 ERROR LOOP:
    - "error detection"
    - "error localisation"
    - "self-correction protocol"
  Step4 S4 TRANSFER:
    - "variation ladder"
    - "principle extraction"
    - "twist question training"
  Step5 S5 TIME CONTROL:
    - "time budgeting"
    - "first-step speed"
    - "accuracy under mild time"
  Step6 SPEED (ONLY LAST):
    - "raise velocity gradually"
    - "monitor variance + stress"

[NODE]
SGP.SG.BT×EDU.MATH×Z0×R×METRIC×BTT.MATH.SENSOR.ERROR_REPEAT×v1.0:
  def: "same error recurrence frequency per 10 questions"
[NODE]
SGP.SG.BT×EDU.MATH×Z0×R×METRIC×BTT.MATH.SENSOR.START_LATENCY×v1.0:
  def: "time to first correct step"
[NODE]
SGP.SG.BT×EDU.MATH×Z2×R×METRIC×BTT.MATH.SENSOR.TRANSFER_BREAK×v1.0:
  def: "failure probability under format variation"
[NODE]
SGP.SG.BT×EDU.MATH×Z2×R×METRIC×BTT.MATH.SENSOR.TIME_VARIANCE×v1.0:
  def: "performance variance under timed vs untimed conditions"

[NODE]
SGP.SG.BT×EDU.MATH×Z3×V×LOCK×BTT.MATH.A1_MEANING×v1.0:
  txt: "A1 is not memorisation. A1 = stable primitives + robust transfer + self-correction + time control (P3)."

[LOCKBLOCK:BTT.MATH.v1.0]
Math success is primitives, not topics:
symbol_system + representation + error_loop + transfer + time_control.
BTT repairs in order: truncate → symbols → representation → error loop → transfer → time → speed.
Target: P3 (robust under novelty and time), not P1 cram.