Complete Getting Things Done for Emacs org-mode.

The only Emacs implementation that covers the entire GTD framework:
capture, clarify, organize, reflect, engage, plus the Natural
Planning Model and the Six Horizons of Focus.

Key features:
- One-key inbox processing with clarify, staging table, and hybrid
  date input (t/T/w/h or free-form).
- Reference and Someday/Maybe archives with project association.
- Daily & weekly reviews with table editing and jump-to-source.
- Single-card Do sessions with smart prioritization (urgency,
  horizons, context).
- Horizon matrix view that spot orphaned projects immediately.
- Planning workflow enforces Purpose → Vision → Goal → Project →
  Next Action.

Commands: full-gtd-capture, full-gtd-process-inbox,
full-gtd-review-daily, full-gtd-review-weekly, full-gtd-do,
full-gtd-horizons-view, full-gtd-planning-start.

Data lives in plain Org files (default ~/.full-gtd/).