ctx-progress — the LIVING work-truth doc

The lifetime model and shared conventions live in ../ctx; this is the how-to for the LIVING progress/ folder.

Execution Procedure

progress/ is the supervisor's clipboard, not a second spec: it holds the WORK truth (where we are / next / read-first) and POINTS at spec/ + decisions/, never restating a product fact. The durable "what/why" lives in spec/decisions; progress tracks doing it against them. The ordered T### task list lives here (not in the spec — ctx-spec §14 was retired); each T### points back to the REQ-### in spec/ that it implements.

track_work_truth(project) → one LIVING current-position a fresh session resumes from

# EP1 — Locate / create the progress root
root = ctx/progress/                      # fixed, exactly ONE (see Hard constraints)
doc  = flat progress.md UNTIL ~150 lines, then graduate to a tree