## Context
The AI Agent workflow node's model dropdown could show a model that was
not the one used at run time (e.g. the node displayed "Claude Haiku 4.5"
while the run log showed `openai/gpt-5.6-sol`).
Root cause: workflow agents were created with `modelId:
AUTO_SELECT_SMART_MODEL_ID`. The builder's model `Select` cannot
represent that value — auto-select ids are filtered out of the options
(`useWorkspaceAiModelAvailability`) and the pinned "default" option
remaps its value to the resolved concrete model id (`useAiModelOptions`)
— so `Select` silently fell back to `options[0]`, the alphabetically
first enabled model. Meanwhile the runtime correctly resolved
auto-select to the instance's default smart model.
## What this PR does
### 1. New workflow agents store a concrete model id
`WorkflowVersionStepOperationsWorkspaceService` now reads the
workspace's `fastModel` setting, expands it through
`AiModelRegistryService.getEffectiveModelConfig`, validates it with
`validateModelAvailability`, and stores the concrete model id — so the
dropdown displays the model that will actually run, and workflow agents
default to the cheaper fast tier instead of the smart one.
Falls back to `AUTO_SELECT_FAST_MODEL_ID` if the lookup or validation
fails (workspace missing, no AI provider configured, model disabled), so
node creation never breaks.
### 2. Exclude `search_help_center` and `navigate_app` from workflow
agent runs
`ActionToolProvider` adds both tools unconditionally, but they only make
sense in an interactive chat session (navigation targets the user's
browser; help-center search is a support tool). They are now excluded
via `WORKFLOW_AGENT_EXCLUDED_TOOL_NAMES` in `AgentAsyncExecutorService`,
alongside the existing output-navigation exclusions. Chat agents are
unaffected.
## Test coverage
- Existing specs for `WorkflowVersionStepOperationsWorkspaceService` and
`AgentAsyncExecutorService` updated/passing (new constructor deps
mocked).
- `nx typecheck twenty-server` and `lint:diff-with-main` pass.
<!-- This is an auto-generated description by cubic. -->
<a
href="https://cubic.dev/pr/twentyhq/twenty/pull/23447?utm_source=github"
target="_blank" rel="noopener noreferrer"
data-no-image-dialog="true"><picture><source
media="(prefers-color-scheme: dark)"
srcset="https://www.cubic.dev/buttons/review-in-cubic-dark.svg"><source
media="(prefers-color-scheme: light)"
srcset="https://www.cubic.dev/buttons/review-in-cubic-light.svg"><img
alt="Review in cubic"
src="https://www.cubic.dev/buttons/review-in-cubic-dark.svg"></picture></a>
<!-- End of auto-generated description by cubic. -->
Etienne
a276f3277f
