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feat(codex): add unified session history toggle for official providers

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Codex buckets resume history by the model_provider id recorded in each
session: official runs (no key, built-in "openai") and cc-switch
third-party runs (shared "custom") are mutually invisible in the resume
picker. Add an opt-in setting that runs official providers under the
shared "custom" id so future official sessions land in the same history
bucket as third-party ones. Forward-only by design: existing sessions
are not migrated.

When enabled, official live config.toml gets model_provider = "custom"
plus a [model_providers.custom] entry that mirrors the built-in openai
provider (requires_openai_auth routes auth to the ChatGPT login in
auth.json, name "OpenAI" keeps is_openai() feature gates, explicit
supports_websockets/wire_api restore built-in defaults). auth.json is
untouched.

Key invariants:
- Injection lives only in the live config: switch-away backfill strips
  the exact injected shape, so stored provider configs stay clean and
  turning the toggle off fully reverts on the next write.
- Toggle changes apply immediately via a takeover-aware reapply: when
  the proxy owns the live config (backup/placeholder present), only the
  live backup is updated, mirroring the provider-switch path.
- The takeover backup path runs the same injection so a takeover
  release restores a config that still carries the unified routing.
- Injection refuses to activate a foreign [model_providers.custom]
  table (e.g. stale entry with a third-party base_url) to avoid routing
  ChatGPT OAuth traffic to an unknown backend.

The toggle lives under Settings → Codex App Enhancements; the
description warns that resuming old sessions across providers may fail
because encrypted_content reasoning only decrypts on the backend that
created it (upstream treats cross-provider resume as unsupported).
This commit is contained in:
Jason
2026-06-12 10:40:51 +08:00
parent 4f355970e1
commit 948d762792
14 changed files with 406 additions and 2 deletions
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src/types.ts
+3
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@@ -351,6 +351,9 @@ export interface Settings {
enableFailoverToggle?: boolean;
// Preserve Codex ChatGPT login in auth.json when switching third-party providers
preserveCodexOfficialAuthOnSwitch?: boolean;
// Run official Codex under the shared "custom" provider id so future
// sessions share one resume-history bucket with third-party providers
unifyCodexSessionHistory?: boolean;
// User has confirmed the failover toggle first-run notice
failoverConfirmed?: boolean;
// User has confirmed the first-run welcome notice