Adds a built-in Browser tab to the Agents page right panel, alongside
the built-in Terminal and Desktop tabs, when the chat's bound agent has
an app with the well-known slug `agent-browser`. The tab shows only
while the app is embeddable and its health is `healthy` (or `disabled`,
for templates without a healthcheck), so it appears and disappears live
as the daemon comes up or goes down. The iframe stays mounted across tab
switches to preserve session state.
To avoid duplicates, the generic Add Tab menu and persisted
workspace-app tabs now exclude the `agent-browser` app. Detection uses
the existing `coder_app` slug and healthcheck signals already present in
the workspace data model. The workspace watch handler compares the agent
app fields the chat UI consumes, so health transitions propagate without
re-render churn on every heartbeat.
On the backend, the chat `execute` tool now exports
`AGENT_BROWSER_SESSION=<chat id>` on every process it starts.
agent-browser resolves its default session from that variable, so
browser automation from each chat lands in its own isolated session
(named by the chat id in the embedded dashboard) instead of a shared
default browser.
> Mux created this PR on Mike's behalf.
When a workspace has no POSIX sh on PATH (typical for fresh Windows workspaces), the execute tool fails with a raw `exec: "sh": executable file not found in %PATH%` error the model cannot act on.
This change:
- Enriches the above error in chattool with remediation steps and a docs link.
- Documents the requirement in the Coder Agents architecture page.
> This PR was generated by Coder Agents on behalf of @johnstcn
> Mux opened this PR on behalf of Mike.
Fixes CODAGT-451
Adds optional `model_intent` metadata to the built-in execute tool
schema so tool calls can carry a short user-facing intent label without
duplicating the command or duration.
The Agents UI now composes that intent with the existing execute command
and duration fields, displaying labels like `Checking repository state
using git fetch origin for 2.3s` while keeping the shell command visible
as the audit-relevant action.
Existing execute calls without an intent keep the previous `Ran
<command>` fallback label, so only intent-bearing calls get the new
composed label.
- Moves `coderd/chatd/`, `coderd/gitsync/`, `enterprise/coderd/chatd/`
under `x/` parent directories to signal instability
- Adds `Experimental:` glue code comments in `coderd/coderd.go`
> 🤖 This PR was created with the help of Coder Agents, and was
reviewed by my human. 🧑💻
Danielle Maywood