[SITE]
Domain: bukittimahtutor.com
Place:  SGP.SG.BT
Lane:   EDU.EXAM (sensor layer)
Role:   Measurement + Routing (detect → classify → repair route)
Zoom:   Z0–Z3
v:      v1.0

[NODE]
SGP.SG.BT×EDU.EXAM×Z3×V×LOCK×BTT.EXAM.MEANING×v1.0:
  txt: "Exams are sensors for stability under load. They do not define education; they reveal failure signatures to route repair."
[EDGE]
binds_to:
  Z*×EDU×Z3×S×LAW×RATE_DOMINANCE_EDU×v1.0
  SGP.SG.BT×EDU×Z3×R×PROTOCOL×BTT.REPAIR_ROUTING×v1.0

[NODE]
SGP.SG.BT×EDU.EXAM×Z3×S×PRIM×EXAM.LOAD_INJECTION×v1.0:
  def: "exam increases load: time pressure + stakes + dense tasks"
[NODE]
SGP.SG.BT×EDU.EXAM×Z3×S×PRIM×EXAM.VARIATION_INJECTION×v1.0:
  def: "exam introduces novelty/twist; tests transfer not drills"
[NODE]
SGP.SG.BT×EDU.EXAM×Z3×S×PRIM×EXAM.TIME_COMPRESSION×v1.0:
  def: "exam compresses execution time; reveals velocity limits"

[NODE]
SGP.SG.BT×EDU.EXAM×Z0×R×METRIC×SENSOR.READ_PRECISION×v1.0:
  maps_to: S0.INPUT
  def: "missed constraints / misread instructions rate"
[NODE]
SGP.SG.BT×EDU.EXAM×Z0×R×METRIC×SENSOR.SYMBOL_ERROR_RATE×v1.0:
  maps_to: S0/S1
  def: "notation/structure manipulation error frequency"
[NODE]
SGP.SG.BT×EDU.EXAM×Z1×R×METRIC×SENSOR.REPEAT_ERROR_RATE×v1.0:
  maps_to: S3.ERROR_LOOP
  def: "same error recurrence across papers"
[NODE]
SGP.SG.BT×EDU.EXAM×Z2×R×METRIC×SENSOR.TRANSFER_BREAK_RATE×v1.0:
  maps_to: S4.TRANSFER
  def: "failure rate on unfamiliar formats"
[NODE]
SGP.SG.BT×EDU.EXAM×Z2×R×METRIC×SENSOR.START_LATENCY×v1.0:
  maps_to: S1/S4
  def: "time to first meaningful step on non-routine questions"
[NODE]
SGP.SG.BT×EDU.EXAM×Z2×R×METRIC×SENSOR.TIME_END_COLLAPSE×v1.0:
  maps_to: S5/S6
  def: "accuracy drop in final segment of paper"
[NODE]
SGP.SG.BT×EDU.EXAM×Z3×R×METRIC×SENSOR.PANIC_BLANK_RATE×v1.0:
  maps_to: S6.STABILITY
  def: "blanking/panic probability under stakes"

[NODE]
SGP.SG.BT×EDU.EXAM×Z3×R×DICT×BTT.SIGNATURES×v1.0:
  if "many careless errors early":
    root: "S0 input precision weak"
    route: "repair S0 rituals + check scripts"
  if "same mistake repeats across papers":
    root: "S3 error localisation weak"
    route: "error loop rebuild + repeat-error elimination"
  if "can do homework but fails exam twists":
    root: "S4 transfer missing"
    route: "variation ladder + principle extraction"
  if "slow; cannot finish":
    root: "S5 time control + representation inefficiency"
    route: "starter templates + time budgeting + speed-last"
  if "panic / blanking":
    root: "S6 stability overloaded; acceleration mismatch"
    route: "truncate load + staged reintroduction + confidence via competence"
  if "cannot start many questions":
    root: "S1 representation weak or S4 decomposition weak"
    route: "model/decompose templates + low-variance practice"

[NODE]
SGP.SG.BT×EDU.EXAM×Z3×S×LAW×EXAM.PHASE_DRIFT×v1.0:
  def: "Exam load reveals hidden brittleness; students appear P2 in practice but drift to P1/P0 under variation+time."
[EDGE]
binds_to:
  Z*×EDU×Z3×S×PHASE×P0P3.EDU×v1.0
  SGP.SG.BT×EDU×Z3×R×PROTOCOL×BTT.REPAIR_ROUTING×v1.0

[NODE]
SGP.SG.BT×EDU.EXAM×Z2×R×MODULE×EXAM.SEGMENTATION×v1.0:
  segment_1 (start):
    reveals: "S0 reading precision + warm-start capability"
  segment_2 (middle):
    reveals: "S1 representation + S3 error loop stability"
  segment_3 (end):
    reveals: "S5 time control + S6 stability under fatigue"

[NODE]
SGP.SG.BT×EDU.EXAM×Z2×R×HOOK×EXAM.MATH×v1.0:
  sensors:
    - SENSOR.SYMBOL_ERROR_RATE
    - SENSOR.TRANSFER_BREAK_RATE
    - SENSOR.TIME_END_COLLAPSE
  typical_roots:
    - "symbol fluency weak"
    - "method selection error"
    - "time compression mismatch"

[NODE]
SGP.SG.BT×EDU.EXAM×Z2×R×HOOK×EXAM.ENGLISH×v1.0:
  sensors:
    - SENSOR.READ_PRECISION
    - SENSOR.START_LATENCY
    - SENSOR.PANIC_BLANK_RATE
  typical_roots:
    - "weak comprehension parsing"
    - "weak planning templates"
    - "stability under stakes"

[NODE]
SGP.SG.BT×EDU.EXAM×Z3×R×PROTOCOL×BTT.EXAM.ROUTE×v1.0:
  detect:
    - "collect sensor readings from papers/tests"
    - "identify dominant signature"
  route:
    - "map signature → stack primitive"
    - "select repair protocol"
  repair:
    - "truncate speed if mismatch"
    - "rebuild primitives"
    - "reintroduce variation"
    - "reintroduce time"
    - "speed last"
  output:
    - "P1→P2→P3 stability under exam load"

[LOCKBLOCK:BTT.EXAM_SENSORS.v1.0]
Exams are sensors, not goals.
They inject load + variation + time compression to reveal which primitives fail.
BTT reads signatures → routes to stack repair → reintroduces transfer/time → speed last.