[helix] services/reconciler.py — file.written

chore: remove diagram editor link from build.helixcode.app nav

feat(nav): add Diagram Editor link to top nav bar

feat(tools): add diagram-editor.html + restore index.html

[helix] diagram-editor.html — file.written

[helix] CHANGELOG.md — file.written

[helix] services/git_sync.py — file.written

[helix] docs: add CHANGELOG.md

feat: PR-based git workflow + full project README

[helix] fix: git_sync pushes HEAD:main — fixes master->main branch mismatch on GitHub

fix: write pipeline — kb upsert, file_events subscribers, observer jsonb, intelligence_chain f-strings, compression fts conn

fix: journal reads from journal.md not archive, skip timestamp lines, restore truncated file

feat: site_updater subscriber — helixmaster auto-refreshes on every file.written

docs: live README + auto-update action pulling Cortex stats

[helix] auto: routers/node_router.py