v0.6.0 — Version flag, test-env preflight, live demo site

Highlights

• Live demo site — https://asimfish.github.io/super_agent_presentation/ : a landing page plus the real showcase deck, assembled from committed artifacts only (no analytics, no remote assets), deployed by the new pages.yml workflow.
• reportctl --version — the CLI now reports its version, and a regression test binds it to the version declared in CITATION.cff.
• Test-environment preflight — scripts/check_test_env.py fails when file content has been evicted by a sync client (macOS dataless files / .icloud placeholders) and warns when the clone sits in a cloud-sync scope. Added after evicted iCloud content was observed making the subprocess-heavy study tests hang and fail non-deterministically.
• Contribution surface — issue templates and a PR checklist that mirror the CONTRIBUTING evidence gates; citation metadata (CITATION.cff) enables GitHub's "Cite this repository" button.

Compatibility

No changes to protocols, routing, template content, or dist/ output. The frozen skill-tree manifest digest fixture was refreshed after the reportctl change, following the same procedure as the v0.5.0 release.

Verification

302/302 unit tests and presentation_benchmark.py smoke green on Python 3.9/3.12/3.14 (CI) and locally.