CEL string concatenation currently fails when prompt builders read
missing or null fields. This commit adds `text(root, "path", "default")`
custom CEL helper so prompt text can safely read nested state/output
values.
* Add generated Flow Definition authoring skill
Generate a portable skill from the Flow Definition schema so agents can
author valid declarative flows with the same reference CrewAI uses to
validate them. New declarative flow projects now write this skill.
```python
from crewai.flow.flow_definition import FlowDefinition
skill = FlowDefinition.skill(skips=(), examples_format="yaml")
```
* `examples_format` accepts `"yaml"` or `"json"`.
* Supported skips: `conversational`, `non_linear_flows`, `each`, `hitl`, `persistence`, `config`, `expression_action`, `script_action`, `tool_action`
The generated skill includes authoring rules, a routed crew example, and
an API reference extracted from the Flow, action, state, agent, crew,
and task Pydantic schemas.
* Fix declarative flow scaffold without framework import
* Fix skipped expression action guidance
* Fix markdown links in skill
Remove redundant startup logs from `crewai run` and make the legacy flow
command warning actionable.
- Stop printing `Running the Flow` and `Running the Crew` before project
execution.
- Stop printing the redundant `Flow started with ID: ...` line while
preserving flow lifecycle event emission.
- Replace Click's generic `kickoff` deprecation warning with a clearer
message that tells users to use `crewai run`.
* Add declarative Flow CLI support
Currently, declarative flows can be loaded by the runtime, but the CLI
still treats them as an experimental definition file instead of a
first-class Flow project shape.
With this PR, `crewai create flow --declarative` scaffolds a YAML-backed
Flow project, and `crewai run`, `crewai flow kickoff`, and `crewai flow
plot` can run against the configured definition.
This also lets crew actions reference reusable crew definition files or
folders and override their inputs from the Flow definition, so
declarative flows can compose existing declarative crews without
inlining everything.
* Address code review comments
