SYSTEM: Education OS
MODULE: UK Subject OS Plug-In Template
SCOPE:
  - Subject instances (English / Maths / Science)
  - Plug into:
      UK GCSE OS (Module A)
      UK A-Level OS (Module B)
ZOOM LINK: Z5 (London city execution) ↔ Z0 (student execution)
REFERENCE: CivOS (P0–P3)

SUBJECT OS RULE (LOCK):
  A subject page must define:
    (1) what mastery is (P3)
    (2) top failure modes
    (3) sensor pack
    (4) repair loops mapped to GR*
    (5) verification gates mapping (GCSE / A-Level)

SUBJECT_OS:
  SUBJECT: <English | Maths | Science>
  LEVEL: <KS2/KS3/GCSE/A-Level>
  PRIMARY FUNCTION:
    Convert time into stable, transferable subject capability,
    verified under timed conditions and wrapper variation.

P3 MASTERY (SUBJECT):
  The student can:
    - retrieve methods/knowledge without cues (P-S1)
    - apply to novel wrappers (P-S4)
    - execute under time with low volatility (P-S5)
    - recover after mistakes (recovery protocol)
    - sustain performance across full papers (endurance stability)

FAILURE_MODES (SUBJECT):
  S-F01: Language decoding failure (GF1) (if subject requires reading)
  S-F02: Practice without model (GF2)
  S-F03: Transfer failure under novelty (GF9)
  S-F04: Timed execution collapse (GF6)
  S-F05: Late repair trap (GF7)
  S-F06: Transition shock amplification (GF5)
  S-F07: Wrapper sensitivity (format changes cause collapse)
  S-F08: Error-repeat density (no closure loop)
  S-F09: Endurance collapse (late-paper error spikes)
  S-F10: Narrative substitution (GF10)

SENSORS (GLOBAL PHASE):
  P-S1 retrieval reliability
  P-S2 error histogram (concept/execution/attention)
  P-S3 time-to-solve distribution
  P-S4 transfer check (new wrapper)
  P-S5 timed stability variance

SENSORS (SUBJECT-SPECIFIC):
  SS1: core spine coverage (small set mastery completeness)
  SS2: wrapper variation score (format robustness)
  SS3: endurance stability (late-paper error density vs early)
  SS4: repair latency vs exam horizon (can it close in time?)
  SS5: output quality stability (where output is required)

REPAIR LOOPS (SUBJECT):
  GR1 Buffer Build Loop         → build concept spine
  GR2 Error-Log Loop            → remove repeats + timed retest
  GR3 Transfer Loop             → wrapper variation audits
  GR4 Time-Pressure Loop        → timed micro-sets + recovery protocol
  GR6 Continuity Loop           → routine stability, prevent reset cycles
  GR8 Early-Warning Thresholds  → trigger repair pre-ramp
  (optional) GR11 Pressure-Safety Scheduling → prevent burnout tail

VERIFICATION MAPPING:
  If LEVEL includes GCSE:
    - map to GCSE OS sensors: GCSE-S1..GCSE-S6
    - required proofs:
        timed gap (GCSE-S3) ↓
        transfer gap (GCSE-S4) ↓
        volatility (P-S5) ↓
  If LEVEL includes A-Level:
    - map to A-Level OS sensors: AL-S1..AL-S6
    - required proofs:
        chain-length stability (AL-S1) ↑
        synthesis transfer (AL-S2) ↑
        endurance stability (AL-S3) ↑

FAILURE TRACE (SUBJECT):
  GF1 or GF2 →
  GF9 →
  GF6 →
  GF7 →
  gate failure (GCSE/A-Level)
REPAIR TRACE (SUBJECT):
  GR5 (if language base needed) →
  GR1 →
  GR3 →
  GR4 →
  GR2 →
  P3 across full papers

PORTS (UK SUBJECT PAGE):
  - UK GCSE OS (Module A)
  - UK A-Level OS (Module B) (if relevant)
  - London City Education OS (Z5)
  - UK Nation Education OS (Z6) (future)
  - W4 GF Library
  - W5 GR Library
  - W1 City Registry + W3 Comparative Registry

SUBJECT_OS:
  SUBJECT: UK English (GCSE)
  PRIMARY FUNCTION:
    Convert reading comprehension + writing output into timed,
    transferable exam performance across unseen texts and prompts.

P3 (UK ENGLISH GCSE):
  - decodes unseen passages accurately under time
  - extracts evidence and builds coherent argument
  - writes structured responses with stable quality
  - handles prompt variation without collapse
  - maintains low volatility across papers

FAILURE_MODES:
  EN-F01: vocabulary/comprehension drift (GF1)
  EN-F02: quote-hunting without understanding (false competence)
  EN-F03: weak argument structure (claims without reasoning)
  EN-F04: prompt-wrapper sensitivity (GF9)
  EN-F05: timed writing collapse (GF6)
  EN-F06: shallow revision (memorise templates; fails on new text)
  EN-F07: late repair trap (GF7)
  EN-F08: feedback not converted into loops (GF10)

SENSORS:
  P-S1 retrieval (key methods: paragraph structures, evidence use)
  P-S2 error histogram (comprehension vs structure vs language)
  P-S3 time-to-write distribution (per paragraph)
  P-S4 transfer (new text, new prompt robustness)
  P-S5 timed volatility (score swings across timed papers)
  SS5 output stability:
    - thesis clarity stability
    - paragraph coherence stability
    - evidence integration stability

REPAIRS:
  GR5 Language-Base Loop:
    - daily vocab retrieval
    - comprehension parsing drills
    - short output to enforce active recall
  GR1 Buffer Build:
    - argument spine (thesis → evidence → reasoning)
    - paragraph micro-mastery
  GR3 Transfer Loop:
    - unseen text variants weekly
    - prompt variation audits
  GR4 Time-Pressure Loop:
    - timed paragraph micro-sets
    - recovery protocol: reset + re-outline + continue
  GR2 Error-Log:
    - tag errors: misread / weak inference / structure / expression
    - retest same failure type under time

GCSE MAPPING (ENGLISH):
  proofs required:
    GCSE-S3 timed gap ↓
    GCSE-S4 transfer gap ↓
    P-S5 volatility ↓

FAILURE TRACE:
  GF1 language drift →
  GF9 prompt sensitivity →
  GF6 timed writing collapse →
  GF7 late repair →
  GCSE underperformance
REPAIR TRACE:
  GR5 language base →
  GR1 argument spine →
  GR3 unseen prompt audits →
  GR4 timed paragraph stability →
  GR2 closure of repeated errors →
  P3 reliability

SUBJECT_OS:
  SUBJECT: UK Maths (GCSE)
  PRIMARY FUNCTION:
    Convert concept spine (number → algebra → functions/geometry/stats)
    into stable timed execution with strong transfer under wrapper variation.

P3 (UK MATHS GCSE):
  - retrieves methods without cues
  - selects correct method under mixed papers
  - handles worded/graphical wrappers
  - executes under time with low careless-error density
  - shows stable performance across full papers

FAILURE_MODES:
  MA-F01: algebra spine gaps hidden by calculator/intuition (silent gaps)
  MA-F02: practice without model (GF2)
  MA-F03: wrapper sensitivity in word problems (GF9 + GF1 coupling)
  MA-F04: timed collapse (GF6)
  MA-F05: error-repeat density (no closure loop)
  MA-F06: topic switching without mastery (no spine forms)
  MA-F07: late repair trap (GF7)
  MA-F08: transition shock to higher-tier questions (GF5)

SENSORS:
  P-S1 retrieval (core methods)
  P-S2 error histogram (concept vs execution vs attention)
  P-S3 time-to-solve distribution (by topic)
  P-S4 transfer (same concept, new wrapper)
  P-S5 timed volatility
  SS1 core spine coverage:
    - algebra primitives mastery completeness
    - function/graph interpretation stability

REPAIRS:
  GR1 Buffer Build:
    - lock algebra primitives
    - small-set mastery + spaced retrieval
  GR3 Transfer Loop:
    - worded ↔ symbolic ↔ graphical wrapper audits
  GR4 Time-Pressure Loop:
    - timed micro-sets per topic
    - recovery protocol: skip/return + error containment
  GR2 Error-Log Loop:
    - classify recurring mistakes
    - retest timed until repeat rate collapses
  GR8 Early-Warning Thresholds:
    - if transfer gap persists, trigger buffer rebuild before ramp

GCSE MAPPING (MATHS):
  proofs required:
    GCSE-S4 transfer gap ↓
    GCSE-S3 timed gap ↓
    GCSE-S2 repair latency ↓
    P-S5 volatility ↓

FAILURE TRACE:
  GF2 practice without model →
  GF9 wrapper novelty collapse →
  GF6 timed execution collapse →
  GF7 late repair →
  GCSE underperformance
REPAIR TRACE:
  GR1 algebra spine →
  GR3 wrapper audits →
  GR4 timed stability →
  GR2 closure of repeats →
  P3 reliability

SUBJECT_OS:
  SUBJECT: UK Science (GCSE)
  PRIMARY FUNCTION:
    Convert concept understanding + application + data interpretation
    into stable answers under time, including unfamiliar contexts.

P3 (UK SCIENCE GCSE):
  - retrieves core concepts accurately
  - applies to unfamiliar contexts (transfer)
  - interprets graphs/data reliably
  - answers using correct scientific language
  - maintains stability under timed papers

FAILURE_MODES:
  SC-F01: vocabulary/command-word misunderstanding (GF1)
  SC-F02: memorisation without mechanism (pattern recall, weak transfer) (GF9)
  SC-F03: data/graph interpretation collapse under time (GF6)
  SC-F04: practical/experimental reasoning gaps (method logic missing)
  SC-F05: wrapper sensitivity (context changes break answers) (GF9)
  SC-F06: late repair trap (GF7)
  SC-F07: narrative substitution (GF10)

SENSORS:
  P-S1 retrieval (definitions + mechanisms)
  P-S2 error histogram (concept vs command-word vs data)
  P-S3 time-to-answer distribution (long response questions)
  P-S4 transfer (new context application)
  P-S5 timed volatility
  SS2 wrapper variation score:
    - same mechanism across different contexts
  SS5 output stability:
    - correct scientific phrasing under time

REPAIRS:
  GR5 Language-Base Loop:
    - command words + scientific vocabulary retrieval
  GR1 Buffer Build:
    - mechanism spine (cause → effect → prediction)
  GR3 Transfer Loop:
    - same mechanism across contexts weekly
  GR4 Time-Pressure Loop:
    - timed long-response micro-sets
    - recovery protocol: plan → answer → check command word compliance
  GR2 Error-Log:
    - tag errors: command-word / concept / data / explanation
    - retest same error category under time

GCSE MAPPING (SCIENCE):
  proofs required:
    GCSE-S4 transfer gap ↓
    GCSE-S3 timed gap ↓
    P-S5 volatility ↓

FAILURE TRACE:
  GF1 command-word language drift →
  GF9 context novelty collapse →
  GF6 timed long-response collapse →
  GF7 late repair →
  GCSE underperformance
REPAIR TRACE:
  GR5 command-word mastery →
  GR1 mechanism spine →
  GR3 context transfer audits →
  GR4 timed long-response stability →
  GR2 closure loops →
  P3 reliability