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ML-155: Compact collection summary and add stats preamble

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Claudio Ortolina
2026-05-01 22:51:45 +01:00
parent 179ac35130
commit 0b78f24fed
3 changed files with 152 additions and 16 deletions
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backlog/completed/ml-155 - Compact-collection-summary-format-statistical-preamble-for-chat-context.md
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---
id: ML-155
title: Compact collection summary format + statistical preamble for chat context
status: Done
assignee: []
created_date: '2026-05-01 21:43'
updated_date: '2026-05-01 21:49'
labels: []
dependencies: []
priority: high
---
## Description
<!-- SECTION:DESCRIPTION:BEGIN -->
Reduce the token count of collection_summary/0 by:
1. Compacting format_group/1 (year-only dates, remove type field, reduce max genres 3→2)
2. Adding statistical preamble (genre/formats/decade distribution) computed inline from fetched records
3. Updating tests for the new format
<!-- SECTION:DESCRIPTION:END -->
## Final Summary
<!-- SECTION:FINAL_SUMMARY:BEGIN -->
Compacted collection_summary format_group/1: year-only dates, removed type field, reduced max genres 3→2. Added statistical preamble (genre/formats/eras distribution + artist count) computed in-memory from already-fetched records. ~27% token reduction (~26.4k → ~19.4k for 1200 records). All 886 tests pass.
<!-- SECTION:FINAL_SUMMARY:END -->