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BrainBar: brain_expand returns ~200-char preview instead of full content for brainbar-* ids #456

Description

@EtanHey

Repro (live, 2026-06-05)

brain_expand on brainbar-07fd5ac9-1e6 / brainbar-156ed5bd-b2c returns ~200-char stubs. DB ground truth: both rows hold FULL content (1,070 / 1,303 chars) — the tool returns the preview_text column (200-char cap) instead of content.

Note: zero context-chunks for brainbar-* ids is BY-DESIGN (manual stores have no session neighbors) — only the shortened content is the bug.

Owner

cmuxlayer-LEAD (BrainBar Swift brain_expand, PR #135). Severity: medium — silently lossy reads of manual stores.

🤖 Filed by brainlayerClaude

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