Files
crewAI/lib
João Moura 6f16e741aa feat(flow): let a declaration drive conversational mode (#7032)
* test(flow): unskip the conversational end-to-end suite

The `conversational_graph_broken` marker parked 21 end-to-end conversational
tests with the reason "the definition-first start migration intentionally
stopped scanning inherited methods, so that graph no longer registers".

That is no longer true: `_iter_flow_methods` walks the MRO for
`__conversational_only__` methods (dsl/_utils.py:406-420), so a
`conversational = True` subclass does register `route_conversation`,
`converse_turn`, `end_conversation` and `answer_from_history_turn` — which
`test_flow_definition.py:391-407` already asserts.

Removing the marker takes the file from 47 passed / 21 skipped to 68 passed.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

* feat(flow): make conversational opt-in unmistakable

Opting a Flow into chat took two statements, and forgetting one failed
silently. With `@ConversationConfig(...)` but no `conversational = True`:
`FlowDefinition.conversational` came back `None`, the built-in graph never
registered, and `handle_turn()` returned `None` without appending a message
or raising — while `chat()` reported "only available on conversational flows"
on a class that was literally decorated with a conversational config.

Three changes:

- `ConversationConfig.__call__` now also sets `conversational = True`. Every
  field on the config is consumed only by the conversational graph, so a
  decorated non-conversational Flow could only ever discard it.
- `FlowConversationalDefinition.enabled` defaults to True. The block is absent
  on non-conversational flows, so declaring it is the opt-in; `enabled: false`
  remains an explicit opt-out.
- `handle_turn()` raises like `chat()` and `stream_turn()` already do instead
  of silently returning `None`.

Setting `conversational = True` by hand still works and is still the way to
opt in without a config.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

* feat(flow): let a declaration drive conversational mode

`FlowDefinition.conversational` was written by the DSL projection and read by
nothing: every conversational gate resolved through `type(self).flow_definition()`
— the class projection — instead of `self._definition`, the declaration a flow
was actually built from. So `Flow.from_declaration()` on a definition with a
conversational block produced a flow that reported itself non-conversational,
dropped the user message, and never registered its declared routes.

Resolution rules, applied consistently:

- Structure (enabled, methods, route labels, builtin/internal routes) comes
  from `self._definition`, which is the loaded declaration for a declarative
  flow and the class projection otherwise. Both paths now agree.
- Behavior (`conversational_config`) still prefers the class attribute, which
  can hold live objects — a configured LLM, a custom BaseLLM, a response_format
  model class — that the serializable definition degrades to a config dict or a
  `module:qualname` ref. Reading the definition first would silently downgrade
  every decorated Python flow. A declaration-built flow has no class config, so
  `_config_from_definition` supplies one, cached for stable identity.
- A declared `state:` block is never replaced. `_create_default_extension_state`
  is consulted before `_create_definition_state`, so returning `ConversationState`
  there discarded every field the declaration asked for. It now yields to a
  declared state and only supplies the default when nothing else does.

The class-scoped `_is_conversational` / `_conversational_definition`
classmethods are gone; the existing instance-scoped `_is_conversational_enabled`
is the single gate.

A router `response_format` that survived serialization as a ref or schema dict
is dropped with a warning rather than handed to `llm.call()`, which needs a
real class.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
Co-authored-by: ViditOstwal <viditostwal@gmail.com>
Co-authored-by: Vidit Ostwal <110953813+Vidit-Ostwal@users.noreply.github.com>
2026-08-19 19:03:11 +05:30
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