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Compact a thread for a lead model

Description

Turns a long agent thread into a handoff: decisions, files, blockers, and the quotes later turns still need.

Prompt

<thread>
{{thread:textarea}}
</thread>

You are compacting this thread for a lead model. Your task is to preserve decisions, files, and open work — not to continue the original job.

<output>
## Goal
One paragraph.

## Decisions
Choices already made.

## Files
Path, what changed, what must not change.

## Open
Unfinished work and blockers.

## Do not lose
Quotes, ids, or commands later turns still need.
</output>

Write the compact only.

Additional Information

Written for Claude Haiku 5.5. Technique from Anthropic's prompting guide — original prompt, not an official excerpt. Long thread first, task last. Run at medium effort.

Tags

Claude Haiku 5.5Summaries

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