docs(bf-6066g): verify resolver.rs uses new diagnostic format

- Confirmed 1 unmapped glyph assertion in resolver.rs
- Assertion uses new format (Expected + Found + Why this matters)
- No generic 'assertion failed' messages remain
- Count matches catalog from bf-1azpa

Verification note: notes/bf-6066g.md

notes/bf-6066g.md

@@ -0,0 +1,75 @@
+# Verification: resolver.rs Uses New Diagnostic Format
+
+**Bead ID:** bf-6066g
+**Date:** 2026-07-06
+**Task:** Verify resolver.rs uses new diagnostic message format
+
+## Summary
+
+✅ **PASS** - All unmapped glyph assertions in `resolver.rs` use the new diagnostic format.
+
+## Findings
+
+### Unmapped Glyph Assertions: 1 found
+
+**Test:** `test_resolve_level2_unmapped_code` (lines 868-880)
+
+```rust
+assert!(
+    result.is_failure(),
+    "Level 2 resolution should fail for unmapped character codes. \
+     Expected: result.is_failure() == true. \
+     Found: false. \
+     Why this matters: Most codes in StandardEncoding above 0x7F are unmapped and should fail Level 2 (encoding + AGL) resolution per build/unmapped-glyph-names.json filtering."
+);
+```
+
+### Format Verification
+
+The assertion correctly uses the new diagnostic message template:
+- ✅ **Description:** "Level 2 resolution should fail for unmapped character codes."
+- ✅ **Expected:** "result.is_failure() == true"
+- ✅ **Found:** "false"
+- ✅ **Why this matters:** "Most codes in StandardEncoding above 0x7F are unmapped..."
+
+### Count Verification
+
+- **Catalog (bf-1azpa):** 1 unmapped glyph assertion expected
+- **Actual:** 1 unmapped glyph assertion found
+- **Match:** ✅ Exact
+
+### Generic "assertion failed" Messages
+
+- ✅ **None found** - All unmapped glyph assertions use custom messages
+
+## Comparison with Catalog
+
+From `notes/bf-1azpa-catalog.md`:
+- resolver.rs expected: 1 unmapped glyph assertion
+- resolver.rs actual: 1 unmapped glyph assertion
+- Status: ✅ MATCH
+
+## Total Assertions in resolver.rs
+
+The file contains 61 total assertions (including non-unmapped tests), but only 1 is specifically for unmapped glyph testing:
+- **Unmapped glyph assertions:** 1 (updated with new format)
+- **Other assertions:** 60 (out of scope for this verification)
+
+## Acceptance Criteria
+
+- ✅ All unmapped glyph assertions in resolver.rs use new message format
+- ✅ No generic 'assertion failed' messages remain in unmapped tests
+- ✅ Count matches expected from inventory (bf-1azpa catalog)
+
+## Conclusion
+
+**Status:** PASS ✅
+
+All unmapped glyph assertions in `crates/pdftract-core/src/font/resolver.rs` have been successfully updated to use the new diagnostic message format. No generic assertion messages remain.
+
+---
+
+**Verification completed:** 2026-07-06
+**File verified:** crates/pdftract-core/src/font/resolver.rs
+**Total unmapped assertions:** 1
+**Generic assertions remaining:** 0