Lay the backend groundwork so the existing mock-agent can run inside
local_docker containers — needed for real-Docker E2E tests that don't
require Anthropic/OpenAI API keys.
Container builder bind-mounts a host mock-agent binary at
/usr/local/bin/mock-agent when KANDEV_MOCK_AGENT_LINUX_BINARY is set
(or build/mock-agent-linux-amd64 sits next to the kandev binary), the
same pattern already used for agentctl. MockAgent.BuildCommand always
resolves via PATH so the same command works on host (E2E PATH includes
bin/) and in containers (mounted at /usr/local/bin/mock-agent).
Mock now declares non-nil empty RemoteAuth so it counts as a
remote-capable agent. The remoteauth catalog includes specs even with
zero methods, and the frontend gating helper treats an empty-method
spec as "no credentials needed" — letting mock-agent pass the
configure-on-executor check that hides uncatalogued agents on remote
executors.
repositoryCloneURL falls back to the local origin remote URL when the
repo has no provider info, so local-only repos with a real remote
(including file:// remotes used in E2E) work on remote executors that
clone inside the container.
Makefile: build-mock-agent-linux target mirrors build-agentctl-linux.
Filter the agent profile dropdown in both the Create Task dialog and the
New Session dialog to only show agents that are actually configured for
the selected executor profile.
For local/worktree executors, no gating (agents need no extra creds).
For Docker/Sprites profiles, an agent is "configured" iff one of its
remote-auth methods has a value in `remote_credentials` or a non-null
secret in `remote_auth_secrets`. Agents without an entry in the remote
auth catalog (Copilot, Amp, OpenCode, TUI, mock) cannot carry creds on
remote executors and are blocked.
Spec IDs match `AgentProfileOption.agent_name` (the registry-type string
like "claude-acp"); `agent_id` is a DB UUID and unrelated to the catalog.
The Create Task footer surfaces a "No agent profile is configured for X"
tooltip and disables submit when the selected executor profile has no
compatible agents. The New Session dialog auto-swaps to the first
compatible agent and shows the same banner inline.
`useRemoteAuthSpecs` returns a `loaded` flag so callers don't filter
during the initial fetch (would otherwise hide everything).