# Phase C+22 broad-impact (2026-05-18)

## Resolved
- None (escalation, no engine change).

## Advanced
- None on main chain (C+21 baseline 104,607 preserved).
- None on sister chains (11/32/3/41/16 all preserved).

## Persisted
- The scheduler-determinism class persists. Same root cause
  C+20 escalated. Multiple downstream effects of the same
  asymmetry now identified at idx 104,608 (wait.begin —
  absorbed by C+21) and idx 104,610 (post-wait nested-Enter
  branch — NOT absorbable per reading-error #23).

## NEW
- Reading-error class **#34**: cold-run determinism depends on
  input path form. Running ours against the loose `default.xex`
  rather than the parent `.iso` produces a different boot
  trajectory (40× more imports, 1.6M unimpl warnings, different
  thread-create sequence). All cold-vs-cold protocol runs MUST
  use the `.iso` path. ✓ documented in `investigation.md` and
  `cold-vs-cold-result.md`.

## Permanent infrastructure contribution
- None (no engine, diff-tool, schema, or emitter changes).

## Tests
- 204 (unchanged from C+19/C+21).