Andrew Aquino 95fde35194 feat(site): add OSC 52 clipboard support to web terminal (#26437)
Registers an OSC 52 handler on the xterm.js terminal parser so that
programs like tmux can copy text to the browser's system clipboard via
escape sequences (e.g. `printf "\\033]52;c;$(echo -n 'Coder is Cool' |
base64)\\a"`).

The handler decodes the base64 payload and writes it using the existing
`copyToClipboard` utility, which provides an HTTP fallback for insecure
contexts. Clipboard read queries (`?`) are ignored since responding
would require writing back to the PTY.

No new dependencies are needed; xterm.js 5.5.0 already exposes
`terminal.parser.registerOscHandler`.

Closes https://github.com/coder/coder/issues/16577

Generated by Coder Agents on behalf of @aqandrew.

## relevant context from agent chat, summarized by me

ref DEVEX-465

Installing
[@xterm/addon-clipboard](https://npmx.dev/package/@xterm/addon-clipboard)
would have been another way to implement this feature. This would follow
established addon-loading patterns in `WorkspaceTerminal`:


https://github.com/coder/coder/blob/612b6d4e95ac4eb1c4227dfd5979a04c2de6e600/site/src/modules/terminal/WorkspaceTerminal.tsx#L232-L241

However, registering a custom handler instead has a few advantages re:
security and flexibility:

- security
- **ignoring OSC 52 with clipboard read queries** (`payload === "?"`)
prevents processes in the workspace from reading the user's clipboard
without consent
- flexibility
- **ignoring OSC 52 with invalid base64** -- If the addon catches an
error while decoding base64, an empty string will be copied to the
clipboard, i.e., the clipboard contents get cleared, which would be
surprising/frustrating to users. The custom handler doesn't write
anything to the clipboard in this case.
- **ignoring OSC 52 with missing separator** -- The addon returns true
in this case (marks the OSC 52 as handled); the custom handler returns
false (doesn't mark the OSC 52 as handled)

The approach/tests seem sound to me. I would just ask that someone among
reviewers manually test this with tmux, since I'm not a tmux user 🙏🏽
2026-07-06 12:27:43 -07:00
…
2026-06-16 14:43:54 -06:00
…
…
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Coder is a self-hosted platform for cloud development environments and AI coding agents. Workspaces are defined with Terraform, connected through a secure Wireguard® tunnel, and automatically shut down when not used. Coder Agents runs a native AI coding agent whose loop executes in the control plane on your infrastructure, with no API keys in workspaces.

  • Define cloud development environments in Terraform
    • EC2 VMs, Kubernetes Pods, Docker Containers, etc.
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Quickstart

The most convenient way to try Coder is to install it on your local machine and experiment with provisioning cloud development environments using Docker (works on Linux, macOS, and Windows).

# First, install Coder
curl -L https://coder.com/install.sh | sh

# Start the Coder server (caches data in ~/.cache/coder)
coder server

# Navigate to http://localhost:3000 to create your initial user,
# create a Docker template and provision a workspace

Install

The easiest way to install Coder is to use the install script for Linux and macOS. For Windows, use the latest ..._installer.exe file from GitHub Releases.

curl -L https://coder.com/install.sh | sh

You can run the install script with --dry-run to see the commands that will be used to install without executing them. Run the install script with --help for additional flags.

See install for additional methods.

Once installed, you can start a production deployment with a single command:

# Automatically sets up an external access URL on *.try.coder.app
coder server

# Requires a PostgreSQL instance (version 13 or higher) and external access URL
coder server --postgres-url <url> --access-url <url>

Use coder --help to get a list of flags and environment variables. See the install guides for a complete tutorial.

Documentation

Browse the documentation or visit a specific section below:

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Support

Feel free to open an issue if you have questions, run into bugs, or have a feature request.

Join our Discord to provide feedback on in-progress features and chat with the community using Coder!

Integrations

New integrations are always in progress. Open an issue to request one. Contributions are welcome in any official or community repository.

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