[mahach666]

What changes and why

Docs and repository config only. No code, public API or package changes; nothing is removed or marked obsolete.

• README: new "Scope and frozen features" section. NwcIO's core is reading and writing its own format; these extras are now frozen (bug fixes only, no new features or options):
  • HTML viewer, GLB and OBJ export, IFC export.
  • Clash detection (triangle-level and bounding-box engines), clash grouping, clash matrix, HTML clash report.
  • Measure, grids, revision diff, BCF.
  • TimeLiner schedule import/export, selection and search sets, appearance profiler, mesh clipper, Navisworks XML exchange. These stay in NwcIO.
• Planned replacements (none published yet):
  • Viewing moves to IOViewer through a planned NwcIO.Scene adapter over the shared IOScene model.
  • Clash, measure, diff and BCF move to a planned IOCoord package.
  • GLB export moves to a shared GLB writer in a planned IOScene.Formats package.
  • Frozen features are removed no earlier than NwcIO 1.0, and only after a published replacement exists.
• CHANGELOG: [Unreleased] gets a ### Documentation entry for the new section.
• .github/dependabot.yml (new): weekly version updates for the nuget and github-actions ecosystems at the repository root. Not listed in the CHANGELOG, as it does not affect the library or CLI.

Tests

• No code changed; build and test suite: not run.
• dependabot.yml: not validated locally.
• The Docs workflow will not trigger (README and .github/dependabot.yml are outside its path filter); CI runs on the PR as usual.

Notes

• Contains one merge of origin/main (at Viewpoint XML: write an enabled section box only as section_box #133) to resolve a CHANGELOG conflict: fix: correct TimeLiner exports, clash pair counts and runnable samples #126 had added [Unreleased] with its ### Fixed entries; the resolution keeps those and appends ### Documentation. Squash merge, as for recent PRs, leaves no merge commit on main.
• Merge order: no dependencies. Main has moved three commits (fix: keep same-named materials of different models distinct in GLB #134, fix: map folder/NWF/profiler failures to documented CLI exit codes #135, docs: rebuild public-api.md from the actual public surface #136) since the merge, and the branch still merges into it without conflicts; no open PR touches README.md, CHANGELOG.md or .github/.
• Follow-ups: update the README section when IOScene, NwcIO.Scene, IOCoord or IOScene.Formats is published. After merge, expect weekly Dependabot PRs for NuGet packages and GitHub Actions.