Platform Engineering

Most production deploys that break did not break because of bad code. They broke because of context the deployer could not see. A pre-deploy risk score replaces gut feel with six measurable signals and a HOLD/PROCEED/WATCH verdict the pipeline enforces.

Seven patterns for moving DB2, IMS, and VSAM data into RAG: nightly EBCDIC export, CDC, federation, event sourcing, dual-write, schema-on-read, and RAG over the COBOL itself. Pick by freshness budget, not preference.

Modernizations die in the comprehension gap, not the rewrite. The gap has no owner, so it stays open. Five extraction patterns bind every rule to a source line, build the lineage map, and force a behavioral test suite to go green before the new system ships.

Most enterprise AI lives between pilot and replacement. Five patterns for the 12-18 months it actually takes — strangler fig, sidecar, parallel run, dual-write, eval-based rollback — with the rollback signals that catch silent quality drift.