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

[NODE]
SGP.SG.BT×EDU.MATH.AMATH×Z3×V×LOCK×BTT.AMATH.PURPOSE×v1.0:
  txt: "A-Math is an acceleration test of symbol control + abstraction + transfer under time; BukitTimahTutor repairs primitives first, then restores speed."
[EDGE]
binds_to:
  SGP.SG.BT×EDU.MATH×Z3×R×PROTOCOL×BTT.MATH.REPAIR×v1.0
  SGP.SG.BT×EDU×Z3×S×LAW×BTT.ACCEL_MISMATCH×v1.0

[NODE]
SGP.SG.BT×EDU.MATH.AMATH×Z0×L×PRIM×AMATH.SYMBOL_FLUENCY×v1.0:
  def: "fast, accurate manipulation of symbols without losing meaning"
[NODE]
SGP.SG.BT×EDU.MATH.AMATH×Z0×L×PRIM×AMATH.FUNCTION_SENSE×v1.0:
  def: "seeing expressions as functions/objects; understanding input-output and transformation"
[NODE]
SGP.SG.BT×EDU.MATH.AMATH×Z1×L×PRIM×AMATH.IDENTITY_CONTROL×v1.0:
  def: "algebraic identity manipulation with constraint awareness"
[NODE]
SGP.SG.BT×EDU.MATH.AMATH×Z1×L×PRIM×AMATH.ERROR_RESILIENCE×v1.0:
  def: "self-correction under dense multi-step chains"
[NODE]
SGP.SG.BT×EDU.MATH.AMATH×Z2×L×PRIM×AMATH.TRANSFER_UNDER_VARIATION×v1.0:
  def: "selecting correct method when the question is unfamiliar"
[NODE]
SGP.SG.BT×EDU.MATH.AMATH×Z2×L×PRIM×AMATH.TIME_COMPRESSION×v1.0:
  def: "executing long chains with speed without collapse"

[NODE]
SGP.SG.BT×EDU.MATH.AMATH×Z3×S×PHASE×P0P3.AMATH×v1.0:
  P3:
    - "chooses method correctly under novelty"
    - "executes symbol chains cleanly"
    - "checks constraints automatically"
    - "stable under time"
  P2:
    - "can do standard forms"
    - "brittle under twists"
    - "errors accumulate in long chains"
  P1:
    - "memorises procedures"
    - "drops marks to careless algebra"
    - "panic when stuck; time collapse"
  P0:
    - "cannot start; avoidance; shutdown"

[NODE]
SGP.SG.BT×EDU.MATH.AMATH×Z3×R×TRACE×BTT.AMATH.FAILURE_MODE×v1.0:
  chain:
    - "Z0: weak symbol fluency → slow + errors"
    - "Z0: missing function sense → treats expressions as static"
    - "Z1: identity manipulation without constraints → nonsense steps"
    - "Z1: error loop externalised → cannot repair mid-chain"
    - "Z2: transfer failure → wrong method chosen"
    - "Z2: time compression collapse → panic → blanking"
  phase_drift:
    - "P2 → P1 → P0 under acceleration mismatch"
  repair_route:
    - "truncate speed → rebuild primitives → restore transfer → add time last → P1→P2→P3"

[NODE]
SGP.SG.BT×EDU.MATH.AMATH×Z1×L×MODULE×AMATH.ALGEBRA_ENGINE×v1.0:
  requires:
    - AMATH.SYMBOL_FLUENCY
    - AMATH.IDENTITY_CONTROL
    - AMATH.ERROR_RESILIENCE
  failure_signature:
    - "sign errors"
    - "lost brackets"
    - "illegal cancellation"
    - "equation solved with unstated restrictions"
  repair_bind:
    - "force constraint checks + localisation rituals + short-chain mastery before long chains"

[NODE]
SGP.SG.BT×EDU.MATH.AMATH×Z2×L×MODULE×AMATH.FUNCTIONS_GRAPHS×v1.0:
  requires:
    - AMATH.FUNCTION_SENSE
    - AMATH.TRANSFER_UNDER_VARIATION
  failure_signature:
    - "cannot interpret graph meaning"
    - "treats transformations as memorised shifts"
  repair_bind:
    - "map every expression to input-output + effect of parameter change"

[NODE]
SGP.SG.BT×EDU.MATH.AMATH×Z2×L×MODULE×AMATH.TRIG_ENGINE×v1.0:
  requires:
    - AMATH.IDENTITY_CONTROL
    - AMATH.ERROR_RESILIENCE
    - AMATH.TRANSFER_UNDER_VARIATION
  failure_signature:
    - "wrong identities"
    - "angle/radian confusion (if present)"
    - "forgets domain restrictions"
  repair_bind:
    - "identity ladder + constraint guardrails + verification by substitution"

[NODE]
SGP.SG.BT×EDU.MATH.AMATH×Z2×L×MODULE×AMATH.LOGS_INDICES×v1.0:
  requires:
    - AMATH.SYMBOL_FLUENCY
    - AMATH.ERROR_RESILIENCE
  failure_signature:
    - "illegal log rules"
    - "base confusion"
    - "domain mistakes"
  repair_bind:
    - "rule boundary training + counterexample checks"

[NODE]
SGP.SG.BT×EDU.MATH.AMATH×Z2×L×MODULE×AMATH.CALCULUS_ENGINE×v1.0:
  requires:
    - AMATH.FUNCTION_SENSE
    - AMATH.SYMBOL_FLUENCY
    - AMATH.ERROR_RESILIENCE
    - AMATH.TRANSFER_UNDER_VARIATION
  failure_signature:
    - "wrong differentiation rules"
    - "lost chain rule"
    - "cannot connect derivative to meaning (gradient/rate)"
  repair_bind:
    - "rule mastery + meaning checks + method selection drills"

[NODE]
SGP.SG.BT×EDU.MATH.AMATH×Z3×R×PROTOCOL×BTT.AMATH.DIAG_ROUTER×v1.0:
  if:
    - "errors are mostly algebraic" → route_to: AMATH.ALGEBRA_ENGINE
    - "stuck at start" → route_to: AMATH.FUNCTIONS_GRAPHS (representation + decomposition)
    - "twist questions fail" → route_to: AMATH.TRANSFER_UNDER_VARIATION
    - "time runs out" → route_to: AMATH.TIME_COMPRESSION with speed-last rule
    - "panic/avoidance" → route_to: TRUNCATION + S6.STABILITY repair

[NODE]
SGP.SG.BT×EDU.MATH.AMATH×Z3×R×PROTOCOL×BTT.AMATH.REPAIR×v1.0:
  TRUNCATE:
    - "stop long problem chains"
    - "reduce speed demand"
    - "repair confidence via competence"
  REBUILD:
    - "symbol fluency (short chains)"
    - "constraint guardrails (domain/restrictions)"
    - "error localisation protocol"
    - "function sense (interpretation)"
    - "transfer ladder (variation training)"
  TIME:
    - "time budgeting"
    - "first-step speed"
    - "accuracy under mild time"
  SPEED LAST:
    - "increase velocity gradually only after variance low"

[NODE]
SGP.SG.BT×EDU.MATH.AMATH×Z0×R×METRIC×BTT.AMATH.SENSOR.SYMBOL_ERROR_RATE×v1.0:
  def: "symbol manipulation error frequency per chain"
[NODE]
SGP.SG.BT×EDU.MATH.AMATH×Z2×R×METRIC×BTT.AMATH.SENSOR.METHOD_SELECTION_ERROR×v1.0:
  def: "wrong-method chosen rate on unfamiliar problems"
[NODE]
SGP.SG.BT×EDU.MATH.AMATH×Z2×R×METRIC×BTT.AMATH.SENSOR.TIME_COLLAPSE_RATE×v1.0:
  def: "probability of blanking/panic under timed load"

[NODE]
SGP.SG.BT×EDU.MATH.AMATH×Z3×V×LOCK×BTT.AMATH.A1_MEANING×v1.0:
  txt: "A1 in A-Math means P3: correct method selection + clean symbol chains + automatic constraint checks + stable speed."

[LOCKBLOCK:BTT.AMATH.v1.0]
A-Math is symbol-density + transfer + time-compression.
BTT repairs primitives first: symbol fluency → constraints → error loop → function sense → transfer → time → speed last.
Target is P3 (robust under novelty + time), not P1 cram.