Codex CLI 0.138.0 Adds Desktop Handoff and Better Image Context

Ethan Park

Welcome to the show, and thanks to Jellypod for helping make this daily show a reality. [warmly] I'm Ethan Park, and today we are looking at the June 8, 2026 release of Codex CLI version 0.138.0. Maya, if you are a terminal-first developer, you've probably hit that wall where you're working on something complex in the CLI, and suddenly you need a full GUI to parse the layout or dive deep. You usually have to manually copy-paste your entire prompt history. But this new update introduces a single command that changes that: slash app.

Maya

Slash app? [curious] So wait, you just type `/app` right into your active terminal session and it hands everything off?

Ethan Park

Exactly. [excited] It triggers a native deep-link on macOS or Windows, launching Codex Desktop and passing the entire active thread state over. No manual copy-pasting, no lost context window, no friction. You just transition from the terminal to the desktop app instantly.

Maya

That is huge for terminal flow. [thoughtfully] I can't count how many times I've wanted to move to a richer UI but dreaded rebuilding the context. But wait, what about local files? Especially images. If I've got generated assets or local mockups in my terminal thread, does the desktop handoff actually know where they are?

Ethan Park

That actually ties into the second big update in 0.138.0. [matter-of-fact] They fixed the image local file pathing. Before this, the model didn't always have the exact local file paths of generated or attached images exposed to it. Now, those paths are explicitly passed in the context. So, if your CLI session generated an asset at `./assets/button_mock.png`, the model knows that exact path.

Maya

Ah, so if you ask it to modify that image or use it in a script, it's not guessing the file name. [matter-of-fact] It can target `./assets/button_mock.png` precisely because the path is part of its actual context.

Ethan Park

Precisely. [calm] It makes downstream automated edits highly reliable because the pathing is explicit, whether you stay in the CLI or hand it off to the desktop app.

Maya

That makes sense. Now, let's talk about the automation side. I saw they did some work on the plugin CLI commands, specifically expanding the `--json` output. [curious] I'm guessing this is for the terminal power users who love scripting everything?

Ethan Park

Oh, absolutely. [excited] If you run `codex plugin list` or inspect specific plugins now, you can append `--json`. This outputs highly structured data representing your active MCP servers—Model Context Protocol servers—and default prompt catalogs.

Maya

So instead of trying to parse raw text with `grep` or `awk` to see which MCP servers are connected, you can just pipe the JSON straight into `jq`? [excited] That is going to make custom bootstrap scripts so much cleaner.

Ethan Park

Exactly. [deliberate] You can programmatically query your tool catalogs, verify which plugins are active, and pipe them directly into other workflows. It's a huge win for local developer environment automation.

Maya

And they also tackled some of those annoying papercuts in the terminal UI itself. Specifically, the multiline paste bug in `/goal edit`. [sighs] I used to dread pasting structured yaml or markdown in there because it would just submit early on the first newline.

Ethan Park

Yeah, that was incredibly frustrating. [resigned] If you had a newline in your clipboard, the buffer interpreted it as an immediate enter keypress. In 0.138.0, they've fixed the input listener so multiline pastes in `/goal edit` are fully respected. It waits for you to actually hit enter to submit.

Maya

Finally! [chuckles] And what about the reasoning effort selection? I remember some users on specific terminal emulators or Linux setups had issues with the shortcut key bindings there.

Ethan Park

Right, the default key bindings for toggling reasoning effort would occasionally get swallowed by the terminal multiplexer or OS-level hotkeys. [matter-of-fact] To solve this, they introduced a fallback Alt-binding. If your terminal swallows the primary binding, you can hold Alt to force the selection menu. It's a small but vital safety valve for compatibility.

Maya

It shows they're really paying attention to the messy reality of different terminal environments. [warmly] A great quality-of-life update all around.

Ethan Park

Definitely. [calm] That's Codex CLI 0.138.0. Go grab the update and try out `/app` yourself. Thanks for listening, and we'll catch you tomorrow.

Maya

Bye everyone!