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codebase-memory-mcp/vendored/sqlite3/PATCHES.md

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Local patches to the vendored SQLite amalgamation

Reapply every patch below after refreshing the amalgamation, then update scripts/vendored-checksums.txt (shasum -a 256 vendored/sqlite3/sqlite3.c).

1. Unix VFS path ceiling: MAX_PATHNAME 512 → 4096

#define MAX_PATHNAME 4096

Upstream's Unix VFS caps full database paths at 512 bytes, while CBM supports 4 KiB paths everywhere else (cache roots under deep home directories, long project paths on Linux). With the upstream value, opening a store whose absolute path exceeds 512 bytes fails with SQLITE_CANTOPEN. 4096 matches PATH_MAX on Linux and CBM's own path buffers. Windows and the other VFS layers are unaffected (they do not use MAX_PATHNAME).