Maintenance Capability demo · reference build Deliverable

Legacy takeover & regression fixing

Take over existing code, locate issues, add tests, fix and regress — with fix notes and diffs.

This page is a capability demo and reference build. The UI is illustrative — not a delivered artifact for a specific client.

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Bug fixing: diff, unit tests and regression (illustrative UI)

Background

Taking over an undocumented system whose author is long gone, the big risk is "fix one thing, break three." The safe move isn’t a rewrite — it’s a test safety net first, then small fixes with regression at every step.

How we do it

01 Code archaeology: map module dependencies, reconstruct key paths, flag minefields

02 Safety net: add unit/integration tests on core paths to lock current behavior

03 Small-step fixes: root-cause, minimal change, regress each step

04 Documentation: fix notes, diffs and maintenance recommendations

What you get

✓ System state review and dependency map
✓ Core-path unit/integration tests (safety net)
✓ Fixes + regression verification + diff notes
✓ Maintenance recommendations and roadmap

Outcomes & acceptance

Acceptance standard: every fix has a matching test and regression — no new holes
Core paths locked by tests, future changes have a net
Fix notes and diffs are auditable, handover not by word of mouth
System goes from "don’t touch" to "sustainably maintainable"

Want a system like this? Tell us your goal — feasibility within 24h

Proposal and fixed quote are free. Contract on approval, invoice on acceptance, warranty included.

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