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Michael Suchacz
2ad5af5b54
Closes https://linear.app/codercom/issue/CODAGT-268 ## Problem The chat UI collapses large pastes (>=10 lines or >=1000 chars) into a synthetic `pasted-text-*.txt` attachment. A chat created with only such an attachment had no title input anywhere: the create path derived `titleSource` only from text and file-reference parts (so the chat was named "New Chat"), async auto-titling extracted text the same way and silently skipped generation, and the manual propose/regenerate paths returned an empty title for the same reason. The regular prompt path already inlines these files for the model; only the title paths were blind. ## Fix Add a single title-input derivation in `chatprompt` and use it everywhere: - `chatprompt.TitleText` joins text and file-reference parts (unchanged formatting), and falls back to synthetic pasted-text attachment content (truncated to a 16 KiB title budget) when they yield nothing. - `chatprompt.SyntheticPasteFileIDs` identifies paste attachments; `chatprompt.FallbackTitle` consolidates the previously duplicated `chatTitleFromMessage` / `fallbackChatTitle`. - Chat creation captures paste blob references while validating file parts (the file row was already loaded there) and derives `titleSource` via `TitleText`. Only the create path derives titles; message send and edit reuse the same validation without copying any blob data. - `GenerateChatTitleAsync` and the manual propose/regenerate paths resolve paste content via `titlePasteText`, which only queries when a visible user message has no other title text, so chats with typed text never incur a file fetch. - Title-path paste fetches are bounded: a new `GetChatFileDataPrefixesByIDs` query returns only a `substr` prefix (`chatprompt.TitlePasteBytePrefix`, 64 KiB = 4 bytes x the 16 Ki-rune title budget) so full blobs (up to 10 MiB each) never leave the database for titling, and `chatprompt.TitlePasteText` applies the same bound to the create path which already holds the loaded row. Deliberate side effect: because generation-time extraction now matches create-time `titleSource` exactly, file-reference-only chats also become eligible for AI titles. They were previously skipped by the same derivation mismatch. Non-goals: no frontend changes (attachment chip UX stays as is), and non-synthetic user-uploaded `.txt` files still yield "New Chat". ## Testing - Unit tests for `TitleText`, `TitlePasteText`, `SyntheticPasteFileIDs`, `FallbackTitle`, `titleInput`, `titlePasteText`, and paste-aware `extractManualTitleTurns`. - Real-database test for `GetChatFileDataPrefixesByIDs` (prefix shorter and longer than stored data) plus dbauthz coverage for the new query. - Integration tests: paste-only create gets a fallback title from the paste content, async title generation fires with the paste content as input, and `RegenerateChatTitle` works on a paste-only chat. > This PR was written by [Mux](https://mux.coder.com) on Mike's behalf.
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.
- Automatically shutdown idle resources to save on costs
- Onboard developers in seconds instead of days
- Delegate coding work to AI agents on your infrastructure
- Bring any model (Anthropic, OpenAI, Google, Bedrock, self-hosted)
- No LLM credentials in workspaces, user identity on every action
- Centralized model governance, cost tracking, and audit logging
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:
- Workspaces: Workspaces contain the IDEs, dependencies, and configuration information needed for software development
- Templates: Templates are written in Terraform and describe the infrastructure for workspaces
- Coder Agents: Delegate coding work to AI agents running on your self-hosted infrastructure
- Administration: Learn how to operate Coder
- Premium: Learn about paid features built for large teams
- IDEs: Connect your existing editor to a workspace
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.
Official
- Coder Registry: Templates, modules, and integrations for common development environments
- VS Code Extension: Open any Coder workspace in VS Code with a single click
- JetBrains Toolbox Plugin: Open any Coder workspace from JetBrains Toolbox with a single click
- JetBrains Gateway Plugin: Open any Coder workspace in JetBrains Gateway with a single click
- Dev Containers: Build development environments using
devcontainer.jsonon Docker, Kubernetes, and OpenShift - Kubernetes Log Stream: Stream Kubernetes Pod events to the Coder startup logs
- Self-Hosted VS Code Extension Marketplace: A private extension marketplace that works in restricted or airgapped networks integrating with code-server.
- GitHub Actions: An action to set up the Coder CLI in GitHub workflows
Community
- Community Templates: Community-contributed workspace templates in the Coder Registry
- Community Modules: Community-contributed modules to extend Coder templates
- Provision Coder with Terraform: Provision Coder on Google GKE, Azure AKS, AWS EKS, DigitalOcean DOKS, IBMCloud K8s, OVHCloud K8s, and Scaleway K8s Kapsule with Terraform
- Coder Template GitHub Action: A GitHub Action that updates Coder templates
- Discord: Chat with the community and provide feedback on in-progress features
Contributing
New contributors are always welcome. If you are new to the Coder codebase, see the contribution guide to get started.
Hiring
Apply on the careers page if you are interested in joining the team.