fix(claude-code): use realpath for directoryBankMap symlink resolution - #2324

Problem

directoryBankMap entries are matched against the session cwd using os.path.normpath, which does not resolve symlinks. When the cwd is a symlink to a mapped directory (or when the map key itself is a symlink), the comparison silently fails and memory is routed to the wrong bank with no error.

Reported in #2312.

Fix

Replace os.path.normpath with os.path.realpath on both sides of the comparison in derive_bank_id(). realpath resolves symlinks before normalizing, so a directory and any symlink pointing to it produce the same canonical path string.

# Before
normalized_cwd = os.path.normcase(os.path.normpath(cwd))
if os.path.normcase(os.path.normpath(dir_path)) == normalized_cwd:

# After
normalized_cwd = os.path.normcase(os.path.realpath(cwd))
if os.path.normcase(os.path.realpath(dir_path)) == normalized_cwd:

os.path.realpath is available on all platforms (POSIX and Windows). normcase is preserved for Windows drive-letter case-folding.

Test

Added test_directorybankmap_matches_symlinked_cwd to TestDirectoryBankMap — creates a real directory and a symlink to it, verifies both paths resolve to the mapped bank. The test is skipped on platforms that don't support symlinks.

Affected scope

• hindsight-integrations/claude-code/scripts/lib/bank.py — 2-line change
• hindsight-integrations/claude-code/tests/test_bank.py — 1 new test