UK A-Level Chemistry OS — Almost-Code (v1.1)

SYSTEM: Education OS
SUBJECT MODULE: UK A-Level Chemistry OS
PLUGS INTO:
  - UK Verification OS: A-Level OS (Module B)
  - UK Subject OS Plug-In Template
ZOOM LINK: Z6 (UK gate) ↔ Z5 (city execution) ↔ Z0 (student execution)
REFERENCE: CivOS (Phase P0–P3)
PRIMARY FUNCTION:
  Convert chemical mechanisms + quantitative reasoning + data interpretation
  into stable, transferable exam performance under time,
  including unfamiliar contexts and multi-step synthesis.

P3 (A-LEVEL CHEMISTRY):
  The student can:
    - retrieve core mechanisms and definitions without cues (P-S1)
    - decode command words and exam prompts reliably (GF1 control)
    - apply mechanisms to unfamiliar contexts (transfer) (P-S4, AL-S2)
    - sustain multi-step reasoning chains (AL-S1)
    - handle data/graphs/calculations with low error density (P-S2)
    - execute under time with low volatility (P-S5)
    - recover from mistakes using a recovery protocol (GR4)

CORE SPINE (A-LEVEL CHEMISTRY):
  CH-SP1: Particle model + bonding + structure-property reasoning
  CH-SP2: Moles + stoichiometry + quantitative chemistry
  CH-SP3: Energetics + kinetics (rate + mechanism mindset)
  CH-SP4: Equilibria (including acid-base) as system behaviour
  CH-SP5: Redox + electrochemistry logic (electron bookkeeping)
  CH-SP6: Organic chemistry as mechanism + pattern of reactivity (not memorised lists)
  CH-SP7: Analytical methods + data interpretation + uncertainty awareness
  CH-SP8: Synthesis + multi-topic integration (exam signature)

FAILURE_MODES:
  AC-F01: Command-word decoding failure (GF1) ("explain/justify/evaluate")
  AC-F02: Memorisation without mechanism (pattern recall, weak transfer) (GF2→GF9)
  AC-F03: Quantitative fragility (moles/units/steps collapse under time)
  AC-F04: Chain-break instability (multi-step reasoning collapses) (AL-S1)
  AC-F05: Transfer collapse in unfamiliar contexts (GF9)
  AC-F06: Organic “list learning” trap (cannot infer products/mechanisms)
  AC-F07: Data interpretation errors (graphs, trends, uncertainty)
  AC-F08: Timed endurance collapse (late-paper error spikes) (AL-S3)
  AC-F09: Late repair trap (GF7)
  AC-F10: Autonomy scheduling collapse (missed weeks → ramp panic)
  AC-F11: Narrative substitution (GF10) (no sensors, no loops)

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

A-LEVEL GATE SENSORS:
  AL-S1 chain-length stability
  AL-S2 synthesis transfer score
  AL-S3 endurance stability (late-paper error density vs early)
  AL-S5 repair latency vs exam horizon
  AL-S6 self-scheduling stability

CHEM SUBJECT SENSORS:
  ACS-S1: command-word compliance rate (answers match what is asked)
  ACS-S2: mechanism-to-context transfer score (novel prompt robustness)
  ACS-S3: quant stability score (units, sig figs, step accuracy under time)
  ACS-S4: organic mechanism integrity score (predict steps/products reliably)
  ACS-S5: data interpretation stability (trend reasoning, graph reading accuracy)
  ACS-S6: explanation quality stability (coherence + correct causal language)

REPAIR LOOPS (A-LEVEL CHEMISTRY):
GR5 Language-Base Loop (command words + scientific phrasing):
  - daily command-word drills
  - rewrite answers to match prompts
  - active retrieval of key vocabulary
GR1 Buffer Build Loop (mechanism spine):
  - rebuild CH-SP2/4/6 as priority if weak
  - spaced retrieval of mechanisms and conditions
GR3 Transfer Loop (context variation):
  - same mechanism across new contexts weekly
  - synthesis sets mixing multiple spine areas
GR2 Error-Log Loop (closure):
  - classify errors: command-word / mechanism / quant / data / explanation
  - micro-drill root cause
  - timed retest until repeat rate collapses
GR4 Time-Pressure Loop (execution stability):
  - timed micro-sets (short + long response)
  - recovery protocol: re-read prompt → plan → answer → check compliance
GR6 Continuity Loop (autonomy):
  - weekly minimums + consolidation windows
  - prevent missed-week drift
GR8 Early-Warning Thresholds:
  - trigger repair before exam season
GR11 Pressure-Safety Scheduling (optional):
  - protect recovery capacity to prevent burnout tail (GF12)

EARLY WARNING (A-LEVEL CHEMISTRY):
  Trigger repair immediately if any are true:
    - ACS-S1 command-word compliance low
    - ACS-S3 quant stability low under time (units/steps fail)
    - ACS-S4 organic mechanism integrity unstable
    - AL-S2 synthesis transfer below threshold
    - AL-S3 late-paper error density spikes
    - P-S5 volatility high across timed papers
    - AL-S6 self-scheduling variance high (autonomy drift)

FAILURE TRACE:
  GF1 command-word decoding drift →
  memorisation without mechanism (GF2) →
  transfer collapse under unfamiliar context (GF9) →
  quant/organic chain-breaks →
  timed endurance collapse (AL-S3) →
  late repair trap (GF7) →
  A-Level gate failure
REPAIR TRACE:
  GR5 command-word + language base →
  GR1 mechanism spine rebuild (CH-SP2/4/6) →
  GR3 context variation + synthesis audits →
  GR2 closure of recurring errors (quant/organic/data) →
  GR4 timed stability + recovery protocol →
  GR6 continuity + (GR11 pressure safety) →
  P3 reliability across full papers

PROOF OF STABILITY (P3):
  - ACS-S1 command-word compliance high across 3 papers
  - ACS-S2 transfer holds across 3 unfamiliar context families
  - ACS-S3 quant accuracy stable under time; low repeat-unit errors
  - ACS-S4 organic mechanism predictions consistent under wrapper changes
  - AL-S3 late-paper error density does not spike
  - P-S5 volatility low across 3 full timed papers

PORTS:
  - UK Verification OS: A-Level OS (Module B)
  - UK GCSE OS (for prerequisite mapping)
  - UK Subject OS Plug-in Template
  - London City Education OS (Z5)
  - W4 GF Library
  - W5 GR Library