avoid bad marvin recommendations

[zzstoatzz]

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[Copilot]

Pull Request Overview

This PR enriches the Slackbot’s Prefect guidance by adding explicit “never-use” warnings for deprecated 3.x features and standardizing deployment patterns across three modules.

• Added “critical” tips for removed Prefect 3.x features in search.py
• Inserted version‐specific rules into the create_research_agent prompt
• Updated the system prompt in core.py to include removed/deprecated features guidance

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
examples/slackbot/src/slackbot/search.py	Expanded review_common_3x_gotchas() with CRITICAL tips
examples/slackbot/src/slackbot/research_agent.py	Added a “CRITICAL VERSION-SPECIFIC RULES” block to the agent prompt
examples/slackbot/src/slackbot/core.py	Extended the default system prompt to cover removed/deprecated features

Comments suppressed due to low confidence (4)

examples/slackbot/src/slackbot/search.py:54

• [nitpick] Wrap the code snippet flow.from_source('https://github.com/owner/repo').deploy('deployment-name') in backticks to clearly distinguish it as code.

        "CORRECT 3.x deployment pattern: flow.from_source('https://github.com/owner/repo').deploy('deployment-name')",

examples/slackbot/src/slackbot/search.py:65

• [nitpick] Wrap build_from_flow in backticks for consistency and clarity, and consider rephrasing to maintain parallel structure with other tips.

        "If user is on 2.x and asking about deployments, recommend upgrading to 3.x or using workers instead of build_from_flow",

examples/slackbot/src/slackbot/research_agent.py:60

• Indent this line (and subsequent bullet items) to match the surrounding docstring text block for proper alignment and readability.

CRITICAL VERSION-SPECIFIC RULES:

examples/slackbot/src/slackbot/core.py:57

• [nitpick] Prefix this instruction with a - to maintain consistency with the surrounding bullet list format.

If a user explicitly mentions using Prefect 2.x, that's fine, but recommend upgrading to 3.x or using workers in 2.x.