System

The {{entity:Vertical Farm Environment Controller}} system ({{hex:D1F77818}}) has 236 requirements across 6 documents, 224 trace links, and 10 diagrams. This QC session targeted the quality gate blocker: lintHigh 7 > 3 — seven high-severity lint findings that were preventing state advancement. Status entering this session: qc-reviewed from a prior QC pass that identified but did not resolve the high findings.

Findings

Running airgen lint with --substrate-namespace SE:vertical-farm-env revealed the full picture: 47 findings total (7 high, 40 medium). All 7 high findings were ontological mismatches — UHT entity classifications inconsistent with requirement content.

Findings 1–6: Physical Object trait absent for hardware subsystems. Six components carried requirements describing physical enclosures, IP ratings, DIN-rail mounting, and cable infrastructure, but their UHT classifications lacked the {{trait:Physical Object}} trait. Affected entities: {{entity:supervisory control subsystem}} ({{hex:51BD7908}} → {{hex:D6ED7018}}), {{entity:zone climate controller}} ({{hex:D7F73008}} → {{hex:D7F73018}}), {{entity:enrichment subsystem}} ({{hex:40841000}} → {{hex:D6F71018}}), {{entity:co2 injection controller}} ({{hex:D5A57018}} → {{hex:D6A51018}}), and {{entity:zone controller network}} ({{hex:D6855008}} → {{hex:D6851008}}). The {{entity:zone controller}} entity already carried {{trait:Physical Object}} (D7F73008 bit 1 confirmed set) — the prior finding was a namespace cache miss resolved by passing --substrate-namespace.

Finding 7: Zone lacks Physical Object and biocompatibility requirements. The {{entity:zone}} entity classified at hex 00000000 (unresolved abstract concept). The lint identified an additional gap: no biocompatibility or sanitization requirements despite the zone housing crops for human consumption. The zone reclassification with explicit physical-spatial context (growing room with structural boundaries, mechanical hardware, definable volume) produced {{hex:CE851008}}, adding {{trait:Physical Object}}, {{trait:Structural}}, and {{trait:Observable}} traits.

Spray pattern noted: {{sys:SYS-REQ-003}} carries 19 outbound trace links — far above the 5-link threshold. Many links may reflect “contributes to same capability” rather than genuine derivation. This is a residual medium-severity finding for the next QC pass.

Corrections

Entity reclassifications (6): Supervisory Control Subsystem, Zone Climate Controller, CO2 Enrichment Subsystem, CO2 Injection Controller, Zone Controller Network, and Zone (growing zone) all reclassified with context emphasising their physical hardware or physical-spatial nature.

{{sub:SUB-REQ-095}} — Zone Controller Network Physical Infrastructure: Added requirement specifying shielded Cat5e cabling, IP67 GRP junction boxes at zone entry points, and managed industrial Ethernet switches. Traces to {{sys:SYS-REQ-017}} (30-second failover requires fault-tolerant physical cabling). Rationale: the network had architectural requirements (ARC-REQ-002) describing distributed topology but no explicit physical infrastructure procurement specification.

{{sub:SUB-REQ-096}} — Growing Zone Biocompatibility: Added requirement mandating food-safe materials resistant to PAA at 2000 ppm, sodium hypochlorite at 200 ppm, and pH 2.0–10.0, with surface bioburden below 100 CFU/cm2 post-sanitisation. Traces to {{sys:SYS-REQ-016}} (sanitisation sequence verification). Rationale: PAA-based sanitisation is already required at system level; this materialises the implicit assumption that zone surfaces must withstand it.

VER entries: {{sub:VER-REQ-052}} (inspection procedure for ZCN cabling and IP ratings) and {{sub:VER-REQ-053}} (chemical resistance test and bioburden swab culture method) created and linked. Both new SUB requirements now have complete trace chains: STK → SYS → SUB → VER.

Post-corrections lint result: 0 high findings (46 medium). Quality gate cleared.

Residual

{{sys:SYS-REQ-003}} spray pattern (19 links) remains unaddressed. The CO2 concentration regulation requirement has genuine system-wide impact — it constrains the enrichment subsystem, safety interlock, zone climate controller, data acquisition, and zone controller — but 19 links likely includes several “contributes to” relationships that should not be trace links. Reviewing and pruning these links is the primary task for the next interim QC pass.

flowchart TB
  n0["Vertical Farm Environment Controller"]
  n1["Climate Management Subsystem"]
  n2["Horticultural Lighting Subsystem"]
  n3["Nutrient Management Subsystem"]
  n4["CO2 Enrichment Subsystem"]
  n5["Safety Interlock Subsystem"]
  n6["Supervisory Control Subsystem"]
  n7["Data Acquisition and Compliance Subsystem"]
  n8["Zone Controller Network"]
  n0 --> n1
  n0 --> n2
  n0 --> n3
  n0 --> n4
  n0 --> n5
  n0 --> n6
  n0 --> n7
  n0 --> n8
  n8 -->|setpoints/feedback| n1
  n8 -->|PWM commands| n2
  n8 -->|dose/irrigate| n3
  n8 -->|valve commands| n4
  n6 -->|recipes/modes| n8
  n8 -->|sensor data| n7
  n5 -.->|CO2 trip| n4
  n5 -.->|thermal trip| n2

Next

Quality gate is cleared (lintHigh = 0). The system is eligible for advancement to validation phase. Before the validation session: review and prune the {{sys:SYS-REQ-003}} spray pattern — audit each of the 19 outbound links, remove those where the target only “contributes to” CO2 management rather than genuinely deriving from the ±50 ppm setpoint regulation and 3000 ppm software ceiling requirements.