When no in_progress todo is active, fill the middle slot of
gsd-statusline.js with GSD state read from .planning/STATE.md.
Format: <milestone> · <status> · <phase name> (N/total)
- Add readGsdState() — walks up from workspace dir looking for
.planning/STATE.md (bounded at 10 levels / home dir)
- Add parseStateMd() — reads YAML frontmatter (status, milestone,
milestone_name) and Phase line from body; falls back to body Status:
parsing for older STATE.md files without frontmatter
- Add formatGsdState() — joins available parts with ' · ', degrades
gracefully when fields are missing
- Wrap stdin handler in runStatusline() and export helpers so unit
tests can require the file without triggering the script behavior
Strictly additive: active todo wins the slot (unchanged); missing
STATE.md leaves the slot empty (unchanged). Only the "no active todo
AND STATE.md present" path is new.
Uses the YAML frontmatter added for #628, completing the statusline
display that issue originally proposed.
Closes#1989
cc04baa524