Critical fix for silent data corruption where database created 173
duplicate issues with wrong prefix (beads- instead of bd-).
Root cause: When issue_prefix config was missing, CreateIssue fell
back to deriving prefix from database filename (beads.db → 'beads'),
while auto-import imported bd- issues from git with SkipPrefixValidation.
This created duplicates.
Changes:
1. Removed derivePrefixFromPath() - never derive prefix from filename
2. CreateIssue/CreateIssues now REJECT if issue_prefix config missing
- Fail-fast with clear error message
3. Auto-import now SETS issue_prefix from first imported issue if missing
- Handles fresh clone scenario safely
4. Added newTestStore() helper that sets issue_prefix for tests
5. Updated test setup in multiple files to prevent test failures
Follow-ups filed: bd-167, bd-168, bd-169
Closes bd-166
Amp-Thread-ID: https://ampcode.com/threads/T-b2ee0738-b90b-40ef-ae44-f2d93729842c
Co-authored-by: Amp <amp@ampcode.com>
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