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docs(design): the brain index, shared reads and separate writes #1437

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docs(design): the brain index, shared reads and separate writes #1437

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docs(design): the brain index, shared reads and separate writes
santoshkumarradha Sep 24, 2026
d21c36a
docs(changes): entry for the brain index design
santoshkumarradha Sep 24, 2026
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11 changes: 11 additions & 0 deletions docs/changes/unreleased/1437-brain-index-design.md
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---
kind: internal
title: the design and overlap measurement for a brain index of every run across chats
pr: 1437
surface: [docs]
---
One document, no code. `docs/design/brain/DESIGN.md` designs one index of
every run, written only by the engine at run start and end. The index feeds
the existing `<elsewhere>` block, the `tasks` tool and a planning check. The
document measures how often work overlaps across chats today, and maps every
place that assumes one plan store is one run, for a later single store.
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