Study of the owner's live Todoist (387 tasks, 34 hierarchical projects)
grounds a surface-strategy revision: structured task fields suit CLI flags,
large-set triage suits an interactive TUI, and context/KB suits nvim — so v1
adopts three surfaces, each to its strength. Supersedes the earlier
"heph.nvim is the primary surface" framing.
- design.md: new §6.2.1 (Todoist study) + revised §4 (three-surface model)
- tech-spec §1/§8: reframe surface roles; new §8.1 (planned heph-tui agenda)
- tech-spec §14: reorder remaining work (CLI-complete task surface in progress,
heph-tui next, nvim navigation polish, tags/hierarchy deferred)
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
