- 0:00–0:05
Strangler fig migration; Illustrative diagram; TecnoStack; 1 2 3 4 5 6; Strangler fig migration; Replace one capability at a time; Plan each transition; Legacy system; One big rewrite; Capability by capability
Branching diagram: Legacy system, One big rewrite, Capability by capability. Connections: Legacy system to One big rewrite; Legacy system to Capability by capability. Emphasis: Capability by capability.
- 0:05–0:10
Strangler fig migration; Illustrative diagram; TecnoStack; 1 2 3 4 5 6; 01; Route capability by capability; Preserve a clear ownership boundary; Routing layer; Callers; Legacy system; New loyalty service
Network: Routing layer, Callers, Legacy system, New loyalty service. Connections: Callers to Routing layer; Routing layer to Legacy system; Routing layer to New loyalty service. Emphasis: Routing layer.
- 0:10–0:15
Strangler fig migration; Illustrative diagram; TecnoStack; 1 2 3 4 5 6; 02; One authoritative writer; Transfer ownership after reconciliation; Legacy owns writes; Transfer ownership; Retire sync
Sequence: Legacy owns writes, Transfer ownership, Retire sync. Connections: Legacy owns writes to Transfer ownership; Transfer ownership to Retire sync. Emphasis: Transfer ownership.
- 0:15–0:20
Strangler fig migration; Illustrative diagram; TecnoStack; 1 2 3 4 5 6; 03; Shadow without side effects; Then move reads and ownership; Compare outputs; Move reads; Move writes; Retire after checks
Flow: Compare outputs, Move reads, Move writes, Retire after checks. Connections: Compare outputs to Move reads; Move reads to Move writes; Move writes to Retire after checks. Emphasis: Move writes.
- 0:20–0:25
Strangler fig migration; Illustrative diagram; TecnoStack; 1 2 3 4 5 6; 04; Plan recovery before cutover; Reconcile data before switching routes; Pause new writes; Reconcile data; Restore old ownership
Flow: Pause new writes, Reconcile data, Restore old ownership. Connections: Pause new writes to Reconcile data; Reconcile data to Restore old ownership. Emphasis: Reconcile data.
- 0:25–0:30
Strangler fig migration; Illustrative diagram; TecnoStack; 1 2 3 4 5 6; TECNOSTACK; Track every retirement; Finish the migration deliberately; Modernization map; Exit criteria per slice; Retirements tracked; Architecture review; tecnostack.com
Comparison without scores: Modernization map, Exit criteria per slice, Retirements tracked, Architecture review. Emphasis: Retirements tracked.
A silent 30-second guide to incremental legacy replacement: route by capability, keep one authoritative writer, compare without duplicate side effects and plan recovery for data as well as routes.
Read the article: Strangler Fig Pattern: Legacy System Modernization One Slice at a Time