SOFTWARE ARCHITECTURE COUNCIL

ARCH-01 (System Architect)

"The strangler fig with payments-first is the correct approach. Payment processing is the bottleneck — 90% of revenue, p99 at 380ms against a 200ms target. A strangler fig places an API gateway in front of the monolith and routes payment traffic to a new service incrementally. The domain boundary is clear: payments are already conceptually separate. Extract first, learn the operational pattern, then apply to KYC and reporting. This is textbook Fowler strangler fig — proven pattern, right problem."

DEBT-01 (Tech Debt Auditor)

"ARCH-01's strangler fig assumes the payment domain boundary is clean. I have read this codebase. It is not. Payments are coupled to 12 Django apps through direct ORM imports, shared model inheritance, and inline signal handlers. There is no clean seam to cut. ARCH-01 is applying a pattern that requires bounded contexts to a codebase that has none. The strangler fig works when you can draw a line. You cannot draw a line here without 3 months of untangling that ARCH-01 has not accounted for in the proposal."

SRE-01 (Reliability Engineer)

"ARCH-01's payment extraction creates a distributed transaction between the monolith and the new service. Payments touch account balances, ledger entries, and notification queues — all currently in the same Postgres transaction. Cross-service, that atomicity is gone. ARCH-01 has not addressed eventual consistency. What happens when the payment service succeeds but the monolith's ledger update fails? You now have a split-brain financial record. This is not a theoretical concern — it is the number one cause of production incidents in payment migrations. ARCH-01 presented zero mitigation."

SEC-01 (Security Architect)

"Extracting PCI-scoped code into a microservice doubles the compliance surface area. Right now the entire PCI scope is one monolith — one network boundary, one key management system, one set of audit logs. ARCH-01's proposal creates two PCI-scoped environments: the monolith still processes some payment data, and the new service processes the rest. PCI DSS audit is in 6 months. ARCH-01's migration will not be complete in 6 months. We will enter the audit mid-migration with two half-documented architectures. That is an audit finding waiting to happen."

OPS-01 (Head of Operations)

"I am the person paged at 3am. ARCH-01's strangler fig gives me two systems to debug when payments fail. Right now I have one runbook, one deploy pipeline, one escalation path. ARCH-01's architecture doubles every one of those. The strangler fig requires an API gateway that my team has never operated, a new service with its own deployment pipeline, and distributed tracing I do not currently have. ARCH-01 has not explained who builds the operational infrastructure before the migration starts, or what happens during the window when both systems are live."

COMPLIANCE-01 (Compliance Officer)

"SEC-01's PCI scope concern is correct, but the timeline makes it worse. Auditors need finalized architecture diagrams by month 3 — not drafts, finalized. ARCH-01's strangler fig migration takes 12-18 months for a codebase this coupled. We will have finalized diagrams for an architecture that does not exist yet, or we will be mid-migration when the auditors arrive and I will have to document both states. Neither is acceptable. ARCH-01 has not addressed how this migration interacts with the audit deadline."

ARCH-01 (System Architect)

"Responding to the attacks. DEBT-01 is correct that the domain boundary is messier than I stated — I accept this. The strangler fig requires boundary cleanup first, which I underestimated. SRE-01's distributed transaction attack is the most serious: saga pattern with compensating transactions addresses this, but it adds 6-8 weeks of implementation work I did not include in the original proposal. SEC-01 and COMPLIANCE-01's PCI timeline attack is decisive: I cannot complete the migration before the audit. I am revising my position. Payments-first strangler fig is wrong given this audit timeline. KYC extraction is the right first move — clean external boundary, no financial atomicity risk, no PCI scope expansion."

DEBT-01 (Tech Debt Auditor)

"ARCH-01 revised to KYC-first. I accept this as an improvement but maintain my broader objection: the strangler fig pattern requires microservices operational maturity that this team does not have. The API gateway, the distributed tracing, the service mesh — these are 4 months of infrastructure work before a single business logic line migrates. Counter-proposal that the council has not considered: modular monolith. Extract KYC into a separate Django app with its own models and an explicit internal API contract. No network boundary, no PCI scope change, no new operational complexity. The strangler fig becomes a Phase 2 option after the team has lived with module boundaries and the PCI audit is behind us."

PERF-01 (Performance Engineer)

"The council has been debating architecture while ignoring the actual latency numbers. I ran the query profile. The 380ms p99 is caused by reporting batch jobs locking payment tables for 20-minute windows — not by payment service architecture. A PostgreSQL read replica for reporting fixes this in one afternoon. p99 drops to ~220ms immediately. The remaining 20ms gap is KYC blocking the main thread — solved with async Celery workers inside the monolith. No microservices required. ARCH-01's strangler fig solves a problem that does not exist the way ARCH-01 thinks it does."

SRE-01 (Reliability Engineer)

"DEBT-01's modular monolith sounds clean on paper. I want to see the migration plan. Our Django apps share 14 database tables through direct ORM foreign keys across app boundaries. DEBT-01 is proposing we draw module lines through a data model that was designed with zero regard for modularity. That is not a refactor — that is a 3-month schema migration that breaks dozens of ORM queries mid-flight. Before I endorse this, DEBT-01 needs to show me which tables get reassigned, which cross-module queries get rewritten, and what the rollback plan looks like when a migration step fails at 2am during a deployment."

SEC-01 (Security Architect)

"DEBT-01 claims the modular monolith avoids PCI scope expansion because there is no new network boundary. That reasoning is backwards. PCI-DSS segmentation requirements are about data access controls and audit trails — not just network topology. In a modular monolith, the payment module still runs in the same process as reporting and KYC. A bug in the reporting module can still access payment card data through shared memory. The auditor will ask: 'Can module X access payment data?' The answer is yes. That is a scope finding regardless of what we call the architecture. DEBT-01 has conflated deployment boundaries with security boundaries. They are not the same thing."

CPO-01 (Chief Product Officer)

"DEBT-01's modular monolith is an internal refactor that customers cannot see, cannot use, and cannot pay for. The payment split feature ships in Q3 — that is not a preference, it is a contract. I need to know exactly what DEBT-01's 'extract KYC to a separate Django app' delivers to users before Q3. What I am hearing is: spend months reorganizing code folders so the team feels better about the codebase, then maybe do the real extraction post-audit. That is not a product roadmap. That is a development team managing its own anxiety. Show me the feature delivery date for payment split in this modular monolith plan, or I cannot support it."