Release 1.3

Added

• SpecEngine dependency content fingerprint (docs/specs/SpecEngine/c5fingerprint.py): new SpecEngine module that computes per-file SHA-256 hashes over the contents of every file listed in a Doorstop item's references: field and stores a references_content_fingerprint block (combined hash + per-file breakdown) in each item's YAML frontmatter, enabling dependency-aware impact analysis across all Doorstop documents (MRS, SRS, ARC, SWD, TCS, TRP); items whose referenced files have changed since the last run are flagged as [STALE] and have their stored fingerprint updated in-place; supports --dry-run (compute only, no writes), --check (exit code 1 on stale, for use as a CI gate), and --verbose (per-file hash detail) flags; automatically registers the references_content_fingerprint: {} attribute default in the .doorstop.yml of every document that contains references-bearing items; integrated into publish.sh as the final step (after all undo/restore steps)

• DocEngine standalone mode (c5dec docengine <type> -n <name> --standalone): create_docengine_template() accepts a new standalone boolean argument; when set, the command additionally copies the .devcontainer folder, docEngine.Dockerfile, poetry.lock, and pyproject.toml from the repository root into the generated template destination, enabling users to open and use DocEngine directly in VS Code without the rest of the C5-DEC environment; --standalone flag added to the docengine CLI argument parser

• End-user DocEngine manual package (docs/manual/docengine-manual/): added a user-oriented manual authored as a DocEngine report template, including chapters, figures, Quarto configuration, and helper scripts, together with a compiled PDF output artifact for immediate consumption by end users

Modified

• Migrated the DocEngine user manual from the SSDLC page to a dedicated and more detailed docengine.md page under docs/manual
• Updated manual entry README and other relevant docs to reflect the DocEngine documentation update

Fixed

• Bug preventing the Ubuntu font from being used by DocEngine