[SITE]
Domain: bukittimahtutor.com
Place:  SGP.SG.BT
Lane:   BTT.OS (full stack stitching map)
Role:   Index + Router + Interop Map
Zoom:   Z0–Z6 compatible (local now; extensible later)
v:      v1.0

[NODE]
SGP.SG.BT×BTT.OS×Z3×V×LOCK×BTT.MASTER_LOCK×v1.0:
  txt: "BukitTimahTutor repairs learning mechanics under high acceleration. Schools accelerate; exams sense; BTT truncates+stitches to restore P3."
[EDGE]
binds_to:
  Z*×EDU×Z3×V×LOCK×EDU.DEFINITION×v1.0
  Z*×EDU×Z3×S×LAW×RATE_DOMINANCE_EDU×v1.0
  Z*×EDU×Z3×R×PROTOCOL×REPAIR_TRUNC_STITCH×v1.0
  SGP.SG.BT×EDU×Z3×R×PROTOCOL×BTT.REPAIR_ROUTING×v1.0

[NODE_INDEX:BTT.v1.0]
A) EDU Kernel:
  - Z*×EDU×Z3×V×LOCK×EDU.DEFINITION×v1.0
  - Z*×EDU×Z3×S×LAW×RATE_DOMINANCE_EDU×v1.0
  - Z*×EDU×Z3×S×PHASE×P0P3.EDU×v1.0
  - Z*×EDU×Z3×S×STACK×STUDY.SKILLS×v1.0
  - Z*×EDU×Z3×R×PROTOCOL×REPAIR_TRUNC_STITCH×v1.0
B) BTT Core (BukitTimahTutor.com):
  - SGP.SG.BT×EDU×Z3×V×LOCK×BTT.PURPOSE×v1.0
  - SGP.SG.BT×EDU×Z3×R×PROTOCOL×BTT.REPAIR_ROUTING×v1.0
C) Subject Lanes:
  - SGP.SG.BT×EDU.MATH×Z3×V×LOCK×BTT.MATH.PURPOSE×v1.0
  - SGP.SG.BT×EDU.MATH.PSLE×Z3×R×PROTOCOL×BTT.PSLE.REPAIR×v1.0
  - SGP.SG.BT×EDU.MATH.SEC12×Z3×R×PROTOCOL×BTT.SEC12.REPAIR×v1.0
  - SGP.SG.BT×EDU.MATH.SEC34×Z3×R×PROTOCOL×BTT.SEC34.REPAIR×v1.0
  - SGP.SG.BT×EDU.MATH.AMATH×Z3×R×PROTOCOL×BTT.AMATH.REPAIR×v1.0
  - SGP.SG.BT×EDU.ENGLISH×Z3×R×PROTOCOL×BTT.ENGLISH.REPAIR×v1.0
D) Sensor Layer:
  - SGP.SG.BT×EDU.EXAM×Z3×V×LOCK×BTT.EXAM.MEANING×v1.0
  - SGP.SG.BT×EDU.EXAM×Z3×R×PROTOCOL×BTT.EXAM.ROUTE×v1.0
E) Parent Layer:
  - SGP.SG.BT×EDU.PARENT×Z3×V×LOCK×BTT.PARENT.PURPOSE×v1.0
  - SGP.SG.BT×EDU.PARENT×Z3×P×PROTOCOL×BTT.PARENT.ROUTE×v1.0

[NODE]
SGP.SG.BT×BTT.OS×Z3×R×MODULE×BTT.ROUTER_GRAPH×v1.0:
  INPUTS (signals):
    - parent_signals
    - homework_signals
    - test/paper_signals
  DETECT:
    - apply sensor pack (exam + home)
  DIAGNOSE:
    - map signature → primitive gap (S0..S7)
  REPAIR:
    - truncation + stitching protocol
  STABILISE:
    - variance reduction + confidence via competence
  ACCELERATE (last):
    - time + speed reintroduction

[STACK_MAP:S0..S7]
S0 INPUT/DECODING →
  - PSLE: question keywords + units discipline
  - Sec12: algebra symbol decoding (brackets/fractions/signs)
  - Sec34: precision under time
  - English: question parsing + tone/keywords
S1 REPRESENTATION →
  - PSLE: modeling/diagrams
  - Sec12: word→equation translation
  - Sec34: multi-step chain control
  - English: passage/argument mapping
S2 RETENTION →
  - all lanes: spaced reinforcement + recall
S3 ERROR LOOP →
  - all lanes: detect→localise→correct; repeat-error elimination
S4 TRANSFER →
  - PSLE non-routine; Sec mixed papers; A-Math method selection; English inference/intent
S5 META-CONTROL/TIME →
  - time budgeting, sequencing, skip/return strategies
S6 STABILITY →
  - panic prevention, recovery after slip, fatigue control
S7 MEANING →
  - identity protection, persistence, goal anchoring

[TRANSITION_ROUTER]
Primary → PSLE mode:
  if "non-routine fail": route_to PSLE.TRANSFER_VARIATION
  if "careless repeat": route_to PSLE.ERROR_LOOP + INPUT_PRECISION
PSLE → Sec1:
  if "algebra collapses": route_to SEC12.SYMBOL_DECODING + EQUIVALENCE
Sec2 → Sec3:
  if "mixed paper fail": route_to SEC34.METHOD_SELECTION + TRANSFER
Sec3 → A-Math:
  if "symbol chain errors": route_to AMATH.SYMBOL_FLUENCY + ERROR_RESILIENCE
Any stage:
  if "panic/avoidance": route_to STABILITY + TRUNCATION immediately

[EXAM_SENSOR_ROUTING]
misread/irrelevant answers → S0 INPUT_PRECISION
repeat same errors → S3 ERROR LOOP
can do drills, fails twists → S4 TRANSFER
slow/end-collapse → S5 TIME + S1 REPRESENTATION
panic/blanking → S6 STABILITY + truncation
cannot start → S1 REPRESENTATION or S4 DECOMPOSITION

[LAWS:BTT]
LAW_1 SPEED_LAST:
  never increase speed to fix instability
LAW_2 REPAIR_ORDER:
  S0→S1→S2→S3→S4→S5→S6→S7
LAW_3 VARIANCE_FIRST:
  reduce swing before chasing peak marks
LAW_4 IDENTITY_PROTECTION:
  no shame language; competence rebuild first
LAW_5 EXAMS_ARE_SENSORS:
  use papers to route repair, not to punish

[OUTPUT:P3_TARGETS]
Math P3:
  - correct method selection + transfer + time stability
A-Math P3:
  - clean symbol chains + constraints + novelty handling under time
English P3:
  - precise reading + deep vocab + structured writing + stable pacing
Parent P3 support:
  - stable routines + correct routing + identity protection

[INTERNAL_LINKS:BTT.SPINE]
- BTT Master Lock (this page)
- Education Kernel (EDU.DEFINITION + Rate Dominance)
- BTT Repair Routing (Truncation + Stitching)
- PSLE Math Repair Overlay
- Sec 1–2 Math Repair Overlay
- Sec 3–4 E-Math Repair Overlay
- A-Math Repair Overlay
- English Repair Overlay
- Exam Sensors Page
- Parent Protocol Page

[LOCKBLOCK:BTT.FULL_STACK_MAP.v1.0]
BukitTimahTutor is a repair OS: diagnose primitive gaps (S0–S7), truncate runaway load, stitch skill stack back, then reintroduce transfer/time, speed last.
Subjects are lanes; exams are sensors; parents are stability operators; target is P3 robustness, not P1 cram.