SlideMuse v2.20.0

Added

• Adopt a typed density floor for outlines: every page declares one of 12 layout roles, and every content page carries 3-5 distinct supporting points with per-role required content and a page-budget rule. Revises the previous "no bullet count is judged" statement, which was the main density gap.
• Add the matching Page Spec contract: slides[].role accepts the same 12-value enum and slides[].key_points accepts 3-5 unique non-empty strings. Older drafts and frozen samples without the fields stay readable and are not retroactively certified.
• Add a reusable style library: built-in styles ship under vendor/codex-ppt/skills/codex-ppt/references/, user styles live outside the skill install under ${CODEX_PPT_HOME:-~/.codex-ppt-skill}/references/, both are discovered by directory scan, and a same-name user file takes priority.
• Integrate the complete pinned codex-ppt image-generation backend under slidemuse.py generate with prepare, status, dispatch, result, blocker, assemble, chroma and runtime. Upstream MIT attribution and pinned source hashes are verified by generate capabilities --verify-source.

Changed

• The outline gate now requires reporting the outline location, page count, layout-role list and source-image-to-slide mapping, and stating that no slide image or PPTX exists yet. Page Specs, style overviews, generation prompts and final images stay forbidden until the content version is approved.
• Keep the Page Spec route unchanged; the generate backend is an alternative S5 pipeline with its own artifacts. One task uses one source of truth: slide_jobs.json is not a page-spec.json, prepare never calls an image model, and every final slide image still comes from the confirmed host image backend.
• Provide --with-generate for isolated optional dependencies, and generate --offline for local job, status, recording, assembly and chroma-key work that ignores user config and credentials.

Fixed

• Mark scripts/editable_backend.py and scripts/generate_backend.py executable so Linux runners stop reporting EXE001; both files carried a shebang while committed as 100644, which had kept the ubuntu lint step red since the reconstruction backend landed.
• Add requirements-generate.txt to the development requirements so the CI environment installs filelock; without it the generation-backend tests failed with ModuleNotFoundError.
• Re-record all vendored source hashes on an LF (git-blob) basis and verify them with newline normalization. The previous CRLF-basis hashes could never match on Linux checkouts, so every capabilities --verify-source integrity test failed on ubuntu while passing on Windows.
• Import pymupdf directly in the vendored PDF normalization instead of the deprecated fitz shim. Newer PyMuPDF versions print a deprecation warning into captured stdout, which made rebuild prepare misread the deck_manifest.json path and fail PDF normalization tests.
• Accept the standard fonts-liberation path in the vendored slide-layout test font lookup so Linux CI runners with that package installed always find a scalable font.