Environment

• gbrain: 0.18.2
• Schema version: 10 (stuck — see apply-migrations --yes hangs/wedges on v0.13.0 — SIGKILL'd, never completes #373)
• macOS arm64

What happened

After upgrading to v0.18.2, gbrain doctor reports 10 unacknowledged sync failures:

[WARN] sync_failures: 10 unacknowledged sync failure(s). 
  second-brain/business-consulting/wiki/index.md (column "source_id" does not exist)
  second-brain/business-consulting/wiki/log.md (column "source_id" does not exist)
  second-brain/business-consulting/wiki/sources/how-to-build-your-second-brain.md (column "source_id" does not exist)
  ... and 7 more

Root cause

Schema is at version 10. The source_id column doesn't exist at that version — it's added in a later migration. Because the migration chain is wedged at v0.13.0 (see #373), the schema can't advance, and any sync touching the new column fails.

Expected behavior

Either:

1. Sync should degrade gracefully when a column is missing (skip the column, don't fail the file), or
2. The migration wedge should be surfaced more clearly as the reason for sync failures

Workaround

None until #373 is resolved. Running gbrain sync --skip-failed acknowledges but doesn't fix.

Related

• apply-migrations --yes hangs/wedges on v0.13.0 — SIGKILL'd, never completes #373 (migration chain wedged at v0.13.0)
• bun install -g github:... produces broken CLI (Aborted in PGLite callMain) + blocked postinstall hides migrations #218 (bun global install / postinstall)