Project Sources available in ChatGPT (11/11) but Codex task mounts 0/11; only AGENTS.md syncs

What version of the Codex App are you using (From “About Codex” dialog)?

26.810.52044 (build 6662)

What subscription do you have?

ChatGPT Plus

What platform is your computer?

Darwin 25.5.0 arm64 arm

What issue are you seeing?

Project Sources fail to mount when a Codex task is created from an existing ChatGPT Project.

The same Project contains 11 uploaded private Source files in Markdown and YAML formats. All 11 files are available and readable when the Project agent runs in ChatGPT, both in Chrome and in the ChatGPT desktop app.

When a Codex task is created from that Project, AGENTS.md synchronizes successfully and the local sources/ directory is created, but the directory is completely empty. Codex reports that 11 Sources failed to synchronize.

Observed state:

ChatGPT runtime: 11/11 Sources available

Codex task: 0/11 Sources mounted

AGENTS.md: available

sources/: exists but contains 0 files

hidden Source files: 0

zero-byte Source files: 0

temporary or partial-download files: 0

Integrity checks in ChatGPT confirmed that all 11 Sources are readable, none has a size of 0 bytes, and all seven YAML files parse successfully.

This blocks every Codex workflow that depends on the Project Sources.

What steps can reproduce the bug?

Open an existing ChatGPT Project containing 11 uploaded private Project Sources.

Run the Project agent in ChatGPT web or the ChatGPT desktop app.

Confirm that all 11 Sources are available and readable.

Create a new Codex task from the same ChatGPT Project.

Wait for the local project mirror to be created.

Inspect the local sources/ directory.

Observe that AGENTS.md has synchronized, but sources/ contains 0 of the 11 expected files.

The Codex task reports that 11 Project Sources failed to synchronize.

The affected task was created on 17 August 2026 at approximately 14:27–14:28 Europe/Warsaw time.

A task/session ID is not currently available. Please advise where the relevant task ID or Source synchronization logs can be found in the Codex desktop app.

What is the expected behavior?

When a Codex task is created from a ChatGPT Project, all Project Sources available to that Project should be mounted in the Codex task and its local project mirror.

For this Project, the Codex task should receive all 11 Source files and AGENTS.md. The sources/ directory should contain 11 readable, non-empty files.

Additional information

Codex desktop app:

Version: 26.810.52044

Build: 6662

Bundle identifier: com.openai.codex

Operating system:

macOS 26.5.2

Build 25F84

Platform output: Darwin 25.5.0 arm64 arm

The 11 Sources remain fully functional in ChatGPT web in Chrome and in the ChatGPT desktop app on the same Mac. This indicates that the Source files and the ChatGPT Project are healthy.

The failure appears specific to the ChatGPT Project → Codex task synchronization or Source-mount path. Project instructions in AGENTS.md are transferred, but none of the Project Sources are mounted.

The Project Sources are uploaded private files. No GitHub Sources or external connectors are used.

Re-uploading the Sources is not an appropriate workaround because they are already present and working correctly in ChatGPT.