Adversary cold-verify of F2-9 FAILED: the read-back's CKEditor-frame-attach wait timed out on a fresh
cold context (flaky, not 3x-reliable). Fix: read-back now polls EVERY frame's body text for the marker
(don't require the specific ckeditor-inner frame to attach — that's the flaky part) with a generous
~240s deadline + periodic reloads to unstick cold loads. The marker appearing in a fresh context still
proves server-side E2E-encrypted persistence (only URL+fragment key carried over). Also bumped the
session-1 post-type sync wait 9s→12s. F2-13 Adversary-owned; will validate cold before it closes F2-9.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Full-suite custom-tier run showed the pad #/2/pad/edit fragment didn't appear within 80s on a fresh
cold deploy (passed on the warm probe). Bump _open_pad hash-wait to ~240s + one mid-way reload.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Adds tests/cryptpad/playwright/test_pad_content_roundtrip.py: open /pad/ → CryptPad auto-creates a
fragment-keyed pad → type a unique marker into the CKEditor body → wait for encrypted sync → open a
FRESH browser context (no shared localStorage/cookies) → navigate to the captured pad URL → assert
the marker survives in the re-decrypted body. Proves genuine end-to-end-encrypted server-side
persistence (the fresh session carries only the URL+fragment key), the §4.3 create-and-read-back
floor F2-9 requires — not a health/SPA stand-in.
Empirically mapped against CryptPad 2026.2.0 (the prior deferral cited version-fragility on 5.7.0):
editor is the deep nested frame …/pad/ckeditor-inner.html; ~15s cold-cache LESS-compile init; the
fragment-keyed pad URL DOES appear after init; transient net::ERR_NETWORK_CHANGED handled by the
shared goto_with_retry + a mid-load reload retry in the frame wait. PASSED against a live probe
instance. PARITY.md updated (roundtrip = the P3/§4.3 test; SPA-render test kept as fast liveness).
F2-9 is Adversary-owned — left for the Adversary to close after cold-verify.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
