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Michael Suchacz
df1c0f9710
## Stack Context Follow-up fixes from live UAT of the merged chat lifecycle hooks stack (#27430). Two PRs: 1. **This PR**: make hook effects visible and correctly attributed in the transcript. 2. [`mike/chat-hooks-uat/dispatch-capacity`]: reserve dispatch capacity so an admission burst can't fail running turns. ## Why? UAT found three ways the transcript misrepresented what a lifecycle hook did. All three are user-visible and share the same surface (`chathooks/effects.go`, `codersdk.ChatMessagePart`, the conversation timeline), so they're reviewed together. **A prompt `input_override` silently discarded attachments.** `ComposeUserPromptContent` replaced the entire submitted part list with one text part, dropping `file` and `file-reference` parts along with their `chat_file_links`. The user saw their attachments vanish with no explanation. The override now replaces submitted *text* parts only and preserves non-text parts in order. A consumer that wants to block attachments uses `deny`, which is the documented mechanism for refusing a submission. **Every user-visible `system` row was labelled "Lifecycle hook".** The timeline keyed the notice off `role === "system"`. That was correct only by accident, because the hook `user_message` was the sole client-visible system row. The backend now emits the notice as a typed `hook-notice` part and the timeline renders on that, so a future system row can't be mislabelled as a policy notice. **Nothing marked a tool call the hook had rewritten.** A consumer could replace tool input via `input_override` and the transcript showed the rewritten input as if the model had produced it. `ChatMessagePart` gains `hook_rewritten`, set from `preflight.Overrides` on the same path that already carries `ToolCallCreatedAt`, and the tool row renders a "Modified by policy" badge. `ToolCall.PolicyProvider` renders the badge itself, at four wrap sites: the `Tool` dispatch wrapper, the `ReadFilesTool` aggregate and its per-file rows, and `ReadFileTimelineBlock` (grouped and single `read_file` rows bypass `Tool`). Renderer props do not include the flag; descendants consume it through the provider context. The badge is emitted by the provider rather than by the shared header because several renderer branches return early without one, including the auth-required `execute` card, a completed `ask_user_question`, and an empty question payload. Those branches would drop the attribution with no type or runtime error, and the gap is not greppable: every renderer file contains a header somewhere, only individual branches do not. Emitting at the provider removes the possibility instead of enumerating the cases. A rewritten call is wrapped in a group labelled by its badge, so one rewritten file inside a merged read is attributed on its own rather than inheriting the group's badge. `HeaderButton` still appends the policy wording to an explicit `ariaLabel`, since an explicit `aria-label` replaces the name computed from descendants. Provider-executed calls are excluded from attribution. Hooks never see them, and duplicate tool-call ID rejection deliberately skips them, so a reused ID would otherwise mark a provider-executed call as policy-rewritten. ## Testing Go: `coderd/x/chatd/...`, `coderd/x/agenthooks/...`, `codersdk/...`, and `coderd -run 'Hook|Chat'`. Frontend: `tsc` plus every `AgentsPage` story; the only failures are `MCP Tool Completed` and `Scroll To Bottom Button Works With Inverse Scroll`, both of which fail on trunk. A registry-wide story asserts every registered renderer shows the badge, verified against three inverted toggles: removing the badge, hiding it with `display:none`, and skipping the provider for one renderer (which names that renderer). Storybook also covers the rewritten subagent spawn, a completed empty question payload, a non-hook system message, and a failed `read_file` guarding the accessible name. > Mux opened this PR 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.