GitNexus issue #1553 synthetic repro

This repository contains a synthetic reproduction harness for GitNexus issue #1553:

• parse-cache save can fail with "Invalid string length" on large incremental runs

The active repro harness lives under repro/issue-1553/.

Start here

• Issue: abhigyanpatwari/GitNexus#1553
• Harness README: repro/issue-1553/README.md

The detailed commands, retained profile, and manual GitNexus repro sequence are documented in the harness README.