Add Dev response to simplified agent-friendly issue format brief (v0.2.16)

Implementation plan for Phase 1 .issues parser covering: parser architecture
(7 service classes + 4 schema classes), integration into Graph__Repository,
test strategy (~50 tests), label format blocker for Architect, and proposed
file/class structure. Responds to Dinis Cruz brief v0.2.16.

https://claude.ai/code/session_01Sk3ihGTCicEo3dHVs6iXXW

Author: claude