Implement DAG-based message ordering (Phases A+B)#97

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Commits on Feb 12, 2026

Add DAG-based message architecture spec

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Commits on Feb 13, 2026

Commits on Feb 14, 2026

Add hierarchical session navigation with parent/child relationships (Phase B)

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Commits on Feb 15, 2026

Make session backlinks navigable with #msg-d-{N} anchors

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Commits on Feb 16, 2026

Remove unused extract_working_directories (review clean-up)

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Remove unused has_cache_changes (review clean-up)

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Commits on Feb 18, 2026

Fix false forks from context compaction replays and tool-result side-branches

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Commits on Feb 19, 2026

Commits on Feb 23, 2026

Fix pyright errors: type narrowing and protected access

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Commits on Mar 3, 2026

Fix ty check warnings: narrow TranscriptEntry union before accessing parentUuid

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