NATS cloud-native messaging system. Covers Core NATS, JetStream persistence, and request/reply patterns. Use for lightweight, high-performance microservices communication. USE WHEN: user mentions "nats", "jetstream", "cloud-native messaging", "request/reply", "subject wildcards", asks about "lightweight messaging", "microservices communication", "nats streaming" DO NOT USE FOR: complex routing - use `rabbitmq`; AWS-native - use `sqs`; Azure-native - use `azure-service-bus`; JMS compliance - use `activemq`; persistent queues only - use dedicated broker
Membrane autopsy lab methodology — autopsy decision matrix (when to autopsy), element sampling protocol (which to pick, preservation, data package), lab method suite (visual / weight-loss / dye test per ASTM D6908 / SEM-EDS / FTIR / swab + plate count / Fujiwara chlorine test / cross-section), findings-to-action interpretation table, independent and vendor-affiliated labs with cost ranges, warranty claim workflow (open BEFORE pulling the element), bilingual glossary. Use when planning or interpreting an autopsy, or filing a manufacturing-defect warranty claim.
RO/EDI economics (SEC, LCOW, lifecycle decision matrix), Electrodeionization deep-dive (cell pair geometry, FCE feed metric, KPIs, 8 failure modes), EDI vs Mixed-Bed DI sizing economics, pharmaceutical UPW/WFI regulatory context (USP/Ph. Eur./21 CFR Part 11/EU Annex 11), produced-water regulatory context (WHO/ISO 16075/EN 12952-12/SEMI F63). Use for energy benchmarks, cost modelling, EDI design/diagnostics, and regulatory citation.
Nanofiltration (NF) reference — separation mechanisms (Donnan + steric + dielectric exclusion via DSPM-DE), pH-dependent membrane charge and isoelectric point, KPIs and selectivity ratio, vendor matrix (DuPont FilmTec NF270/NF90/NF200/NF245, Suez DK/DL/HL, Toray SUL, LANXESS Lewabrane NF, Pentair X-Flow tubular, Synder NFX/NFS), applications (softening, NOM/color removal, offshore sulfate removal, mining brines, dairy, OSN), operating windows, fouling differences vs RO. Use when designing NF processes, selecting NF membranes, or diagnosing NF performance.
RO/NF pretreatment chain — feed type architectures (SWRO open/beach well, BWRO well/surface, tertiary reuse), pretreatment KPI targets (SDI, turbidity, AOC, Fe/Mn, free Cl2), coagulation chemistry (FeCl3/PAC/alum dose math), antiscalant selection by scaling species, dechlorination (SBS stoichiometry + chloramine handling), CO2/pH management for 2-pass RO and EDI feed, biocide strategy (oxidizing pre-membrane vs non-oxidizing on-membrane), monitoring instrumentation. Use when designing or auditing what sits upstream of RO/NF/EDI.
Reverse Osmosis (RO) and Electrodeionization (EDI) process fundamentals — formulas (recovery, rejection, NDP, osmotic pressure, TCF, NPF/NSP), authoritative standards reference (ASTM/ISO/USP/Ph.Eur./WHO/EN), vendor design windows (DuPont, Hydranautics, Toray, Suez, LANXESS), water chemistry, EDI quick reference, IT/EN glossary. Use when working on RO/EDI plant code, KPI calculations, or normative citations.
RO/NF membrane diagnostic methodology — fouling taxonomy (colloidal, biofouling, organic, particulate), scaling by mineral species (CaCO3/CaSO4/BaSO4/SrSO4/SiO2/CaF2/Fe-Mn), integrity loss (O-ring, breach, chlorine oxidation, telescoping), chemical/operational failures, CIP decision matrix, ASTM D4516 trend-based diagnostics, baseline establishment, and decision-tree pseudo-code. Use when analyzing RO/NF plant data to identify root cause of performance deviation.
Spring WebFlux for reactive programming in Spring Boot 3.x. Covers Mono/Flux, reactive operators, WebClient, functional endpoints, R2DBC integration, reactive error handling, and testing. Use for non-blocking high-concurrency apps. USE WHEN: user mentions "spring webflux", "reactive Spring", "Mono", "Flux", "WebClient reactive", "functional endpoints", "R2DBC", "non-blocking", "StepVerifier", "reactive streams" DO NOT USE FOR: traditional blocking MVC - use `spring-web` skill, simple REST APIs - use `spring-rest` skill, batch processing - use `spring-batch` skill