Add thread summary asset to slackbot

[zzstoatzz]

Summary

• create THREAD_SUMMARY Prefect asset
• materialize summaries every 4 messages in a given thread
• document thread summary workflow

Testing

• ruff check examples/slackbot/src/slackbot/assets.py examples/slackbot/src/slackbot/api.py
• ruff format examples/slackbot/src/slackbot/assets.py examples/slackbot/src/slackbot/api.py
• pytest -q (fails: ModuleNotFoundError: No module named 'chromadb')

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https://chatgpt.com/codex/tasks/task_e_6845165faf548326a740ce682d781190

[Copilot]

Pull Request Overview

This PR adds support for summarizing Slack threads by introducing a new THREAD_SUMMARY asset, materializing summaries after each message, and updating documentation to describe the workflow.

• Define THREAD_SUMMARY asset in assets.py and implement the summarize_thread materialize function
• Invoke summarize_thread in api.py after posting each Slack message
• Document the new thread summary asset chain in ASSETS.md

Reviewed Changes

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

File	Description
examples/slackbot/src/slackbot/assets.py	Added THREAD_SUMMARY asset and summarize_thread function
examples/slackbot/src/slackbot/api.py	Imported and called summarize_thread after posting messages
examples/slackbot/ASSETS.md	Updated documentation to include the thread summary asset chain

Comments suppressed due to low confidence (5)

examples/slackbot/src/slackbot/assets.py:25

• The asset key is static, so multiple thread summaries will collide. Consider parameterizing it with thread_ts, e.g., "summary://slack-thread/{thread_ts}" to uniquely identify each thread.

    key="summary://slack-thread",

examples/slackbot/ASSETS.md:86

• The diagram suggests that USER_FACTS depends on THREAD_SUMMARY, but the current code does not wire USER_FACTS to use the thread summary. Please update the documentation or code to reflect the actual dependency graph.

CONVERSATION -> THREAD_SUMMARY -> USER_FACTS

examples/slackbot/src/slackbot/assets.py:68

• There are no tests covering the new summarize_thread materialization. Please add unit tests to validate that summaries are generated and metadata is stored correctly.

@materialize(THREAD_SUMMARY, asset_deps=[CONVERSATION])

examples/slackbot/src/slackbot/api.py:109

• This integration point is not currently tested. Consider adding an end-to-end or mock-based test to ensure summarize_thread is invoked correctly after posting a message.

        await summarize_thread(thread_ts, conversation)

examples/slackbot/src/slackbot/assets.py:79

• The code uses datetime.now() but datetime is not imported at the top of the file, which will cause a NameError. Please add from datetime import datetime.

    "timestamp": datetime.now().isoformat(),