v0.5.0

Changed

• Aggressive descent on the rate-limit window (ADR-19). The agent now works at FULL
  SPEED until 5% remains (was: "descend, small atomic steps" from 10%), is told to be
  velocity-mindful but keeps working from 5% down to a 1% floor, and only does
  finishing-moves at ≤1% (was: "start nothing new" at 5%). The 1–5% band keeps a stranding
  guard (prefer small divisible steps, checkpoint often, defer huge/indivisible new tasks),
  and the velocity-aware overrides still keep full speed when the window resets before it
  would exhaust. Adds a 1-band to every governor profile so the floor message fires.

Added

• Multi-session burn awareness (ADR-20). The stamp now discloses the combined burn
  rate across all sessions (≈tok/min) and how many are actively burning, and flags an
  anomalous burner — a session burning ≥3× the median of the others — naming whether
  it's this session (ease off) or another (the shared window can drop fast; re-check
  often). Flow samples are tagged by session_id to attribute per-session burn.