Remove redundant CEL text helper + agent repo guidance

[vinibrsl]

This commit removes the redundant CEL text helper, in favor of the easier interpolation syntax.

[coderabbitai]

📝 Walkthrough

Walkthrough

The custom CEL text(...) function and its runtime registration are removed. Flow documentation now requires direct ${...} interpolation without CEL + concatenation, and affected tests are updated accordingly.

Changes

CEL text removal and interpolation guidance

Layer / File(s)	Summary
Remove custom CEL text evaluation lib/crewai/src/crewai/flow/expressions.py	Removes the text(...) helper, registration, examples, documentation, and runtime injection from CEL evaluation.
Update action-mapping guidance lib/cli/src/crewai_cli/templates/declarative_flow/AGENTS.md, lib/crewai/src/crewai/flow/templates/flow_definition_skill.md.j2, lib/crewai/src/crewai/flow/skill.py	Requires literal action-mapping text with direct ${...} interpolation, updates generated action documentation, and prohibits CEL + concatenation.
Migrate interpolation tests lib/cli/tests/test_create_flow.py, lib/crewai/tests/test_flow_definition.py, lib/crewai/tests/test_flow_from_definition.py	Updates documentation assertions and Flow action tests to use direct state and input interpolation instead of text(...) expressions.

Suggested reviewers: lorenzejay, joaomdmoura, gabemilani, greysonlalonde

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title accurately reflects the main change: removing the CEL text helper and related guidance.
Description check	✅ Passed	The description matches the PR's main intent of replacing the CEL text helper with simpler interpolation.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/flow-template-interpolation

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[coderabbitai]

🧹 Nitpick comments (1)

lib/crewai/tests/test_flow_from_definition.py (1)

1300-1323: 📐 Maintainability & Code Quality | 🔵 Trivial | 💤 Low value

Rename stale test: test_agent_action_renders_text_custom_expression_input.

The test name still references "text_custom_expression" but the test body now uses direct ${...} interpolation. Rename to reflect the actual behavior being tested, e.g., test_agent_action_renders_interpolated_input.

♻️ Proposed rename

-def test_agent_action_renders_text_custom_expression_input(
+def test_agent_action_renders_interpolated_input(
     monkeypatch: pytest.MonkeyPatch,
 ):

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@lib/crewai/tests/test_flow_from_definition.py` around lines 1300 - 1323,
Rename the test function test_agent_action_renders_text_custom_expression_input
to reflect that it verifies direct interpolated input, using a name such as
test_agent_action_renders_interpolated_input; leave the test implementation
unchanged.

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Nitpick comments:
In `@lib/crewai/tests/test_flow_from_definition.py`:
- Around line 1300-1323: Rename the test function
test_agent_action_renders_text_custom_expression_input to reflect that it
verifies direct interpolated input, using a name such as
test_agent_action_renders_interpolated_input; leave the test implementation
unchanged.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: f769e597-583e-42ec-988f-68ca9594add6

📥 Commits

Reviewing files that changed from the base of the PR and between fb8e93b and b15a126.

📒 Files selected for processing (6)

• lib/cli/src/crewai_cli/templates/declarative_flow/AGENTS.md
• lib/cli/tests/test_create_flow.py
• lib/crewai/src/crewai/flow/expressions.py
• lib/crewai/src/crewai/flow/templates/flow_definition_skill.md.j2
• lib/crewai/tests/test_flow_definition.py
• lib/crewai/tests/test_flow_from_definition.py