MÖBIUS 0.3.13 - Windows preview

MÖBIUS 0.3.13 — Harness boundary correction

MÖBIUS now keeps a strict ownership boundary around Codex, Claude Code, Pi and
Grok: it calls the installed tools through their documented CLI and never
patches or replaces a harness executable or launcher.

Changes

• Codex handoff and exact native resume explicitly pass the selected project
  through the official -C <directory> option using an ordinary Windows drive
  or UNC spelling.
• Source verification, exact native session IDs, source-owned CODEX_HOME and
  active-writer protection remain in place.
• The experimental Codex source patch and its tests/documentation were removed.
  The installed official Codex 0.153.4 launcher was restored byte-for-byte.
• Documentation no longer claims that the external Codex /resume picker is a
  MÖBIUS acceptance surface.

Verified

• 50 MÖBIUS core and 13 desktop unit tests passed; seven integration tests passed
  and one pre-existing fixture-gated test remained ignored.
• Official Codex 0.153.4 app-server resumed an isolated copy of real history by
  exact ID with the requested cwd; the original transcript prefix was unchanged
  and no model turn was submitted.
• The official 0.153.4 CLI accepts MÖBIUS' -C <directory> resume <id> command.
• Optimized Windows portable EXE and offline-WebView2 installer were rebuilt.

Follow-up verification on 2026-09-11 passed packaged IPC with a separate
WebView2 profile: real PowerShell delivered the exact ID, ordinary cwd and
source-owned home to a recording CLI, with invalid sources correctly rejected.
Official Codex was updated through npm to 0.154.0; the launcher, executable and
code-mode host match the official distribution byte-for-byte. Its app-server
read/resume through external PowerShell passed against isolated real history.
The credential-free interactive TUI stopped at first-run login; that step and
the old default-picker behavior on 0.154.0 remain unverified. No model turn was
submitted. No application binary was changed in this follow-up.

The published download is the portable ZIP (containing the EXE) and SHA256SUMS.
The standalone EXE and offline installer are retained locally; uploads did not
complete. The preview is unsigned and portable use requires WebView2 Runtime.

Known external picker limit

Official Codex 0.153.4 can show an empty Cwd/Active /resume picker for an old
state row whose indexed cwd spelling or historical provider differs from the
current filter. MÖBIUS cannot alter that query without crossing the harness
boundary. The exact session remains recoverable through MÖBIUS or
codex resume <id> after its active writer exits normally.

Follow-up resolution (2026-09-11): the user authorized rollback of the
custom Grok/provider router. Restoring the original built-in provider resolved
the affected default picker. External codex resume, typed /resume, and
packaged MÖBIUS real PowerShell now list the expected project session without
provider overrides. External selection and MÖBIUS' native resume handler both
reach the official protection for the still-open session. Its owner must exit
normally before continuation; no takeover or model turn was performed.

Acceptance details