diff --git a/notes/pdftract-25k4x.md b/notes/pdftract-25k4x.md
index b1b7c1f..8aa6a09 100644
--- a/notes/pdftract-25k4x.md
+++ b/notes/pdftract-25k4x.md
@@ -1,83 +1,75 @@
-# pdftract-25k4x: Figure Detection + Caption Detection
+# Figure and Caption Detection Verification - pdftract-25k4x
 
-## Status: COMPLETE
+## Acceptance Criteria Verification
 
-## Overview
-Figure detection and caption detection were already implemented in the codebase in:
-- `crates/pdftract-core/src/layout/figure.rs` (517 lines, 16 tests)
-- `crates/pdftract-core/src/layout/caption.rs` (342 lines, 8 tests)
+### 1. Image XObject, no text overlap: 1 Figure block
+**Location:** `crates/pdftract-core/src/layout/figure.rs:130`
+- Checks `text_overlap_area / image_area < 0.5`
+- Creates Block with kind="figure"
+- **PASS** - Tests: `test_classify_figure_pure_visual_image`, `test_classify_figure_no_glyphs`
 
-## Verification Summary
+### 2. Image + small-font caption 1 line below: Figure + Caption
+**Location:** `crates/pdftract-core/src/layout/caption.rs:126-140`
+- Checks `block.median_font_size < ctx.page_body_median` (small font)
+- Checks `vertical_distance < 2.0 * ctx.line_height` (within 2 lines)
+- Sets kind to "caption"
+- **PASS** - Test: `test_caption_immediately_below_figure`
 
-### Figure Detection (`classify_figure`)
-**Algorithm:**
-1. Walks image XObjects from Phase 3.3 Do + Phase 3.5 inline images
-2. For each image, computes union area of all text glyph bboxes intersecting the image
-3. Uses sweep line algorithm for precise union area computation
-4. If `text_overlap_area / image_area < 0.5`, creates a Figure block
-5. Sorts figures by bbox top Y (descending)
+### 3. Image overlapping text (background): NOT Figure
+**Location:** `crates/pdftract-core/src/layout/figure.rs:130`
+- Images with >= 50% text overlap are NOT classified as figures
+- **PASS** - Tests: `test_classify_figure_text_on_image`, `test_classify_figure_partial_text_above_threshold`
 
-**Acceptance Criteria Verification:**
-| Criteria | Test | Status |
-|----------|------|--------|
-| Image XObject, no text overlap → 1 Figure block | `test_five_figures_no_text` | ✅ PASS |
-| Image + small-font caption 1 line below → Figure + Caption | `test_caption_immediately_below_figure` | ✅ PASS |
-| Image overlapping text (background) → NOT Figure | `test_text_covered_image_not_figure` | ✅ PASS |
-| Text overlap < 50% → Figure | `test_classify_figure_partial_text_below_threshold` | ✅ PASS |
-| Text overlap ≥ 50% → NOT Figure | `test_classify_figure_partial_text_above_threshold` | ✅ PASS |
+### 4. Caption 5 lines below: NOT Caption
+**Location:** `crates/pdftract-core/src/layout/caption.rs:145-148`
+- Checks `vertical_distance >= 2.0 * ctx.line_height`
+- Returns false if too far below
+- **PASS** - Test: `test_caption_too_far_below_figure`
 
-### Caption Detection (`classify_caption`)
-**Algorithm:**
-1. Checks font size < page_body_median
-2. Requires previous block is a Figure
-3. Vertical distance < 2 * line_height
-4. Same column (when num_columns > 1)
-
-**Acceptance Criteria Verification:**
-| Criteria | Test | Status |
-|----------|------|--------|
-| Small font + follows Figure + within 2 lines + same column → Caption | `test_caption_immediately_below_figure` | ✅ PASS |
-| Caption 5 lines below → NOT Caption | `test_caption_too_far_below_figure` | ✅ PASS |
-| Caption different column → NOT Caption | `test_caption_different_column` | ✅ PASS |
-| Font not smaller than body → NOT Caption | `test_caption_font_not_smaller` | ✅ PASS |
-| No previous Figure → NOT Caption | `test_no_previous_figure` | ✅ PASS |
+### 5. Caption different column: NOT Caption
+**Location:** `crates/pdftract-core/src/layout/caption.rs:152-154`
+- Checks `block.column != figure.column` in multi-column layouts
+- Returns false if different column
+- **PASS** - Test: `test_caption_different_column`
 
 ## Test Results
-```
-Figure tests: 16 passed; 0 failed
-Caption tests: 8 passed; 0 failed
-```
 
-## Key Implementation Details
+### Figure Classifier Tests (16/16 PASS)
+- test_bboxes_intersect
+- test_classify_figure_no_images
+- test_classify_figure_partial_text_below_threshold
+- test_classify_figure_partial_text_above_threshold
+- test_classify_figure_exactly_at_threshold
+- test_classify_figure_no_glyphs
+- test_classify_figure_pure_visual_image
+- test_bbox_area
+- test_classify_figure_sort_order
+- test_classify_figure_empty_context
+- test_classify_figure_text_on_image
+- test_compute_text_overlap_area_multiple_glyphs
+- test_compute_text_overlap_area_union
+- test_figure_block_properties
+- test_five_figures_no_text
+- test_text_covered_image_not_figure
 
-### INV (Invariants)
-- ✅ Figure block has empty `lines` Vec (lines=[], but Block uses `text: String` instead)
-- ✅ Figure blocks have `median_font_size: 0.0`
-- ✅ Caption blocks have `kind: "caption"` set via `set_caption()`
+### Caption Classifier Tests (8/8 PASS)
+- test_caption_above_figure
+- test_caption_font_not_smaller
+- test_caption_too_far_below_figure
+- test_no_previous_figure
+- test_caption_different_column
+- test_caption_immediately_below_figure
+- test_block_accessors
+- test_page_classification
 
-### Critical Considerations Addressed
-- **Text overlap union algorithm**: Uses sweep line for accurate union area (not naive sum)
-- **Sorting**: Figures sorted by top Y descending for consistent page order
-- **Column assignment**: TODO comment present for column assignment based on image center
-- **Above-figure captions**: NOT detected in v0.1.0 (as specified in bead)
+## INV Verification
+- **INV: Figure block has empty lines Vec** - SATISFIED: Block created with text=String::empty(), median_font_size=0.0
+- **Caption above figure NOT detected in v0.1.0** - SATISFIED: caption.rs test_caption_above_figure returns false
 
-## Files Modified
-None - implementation was already complete
+## Files Verified
+- crates/pdftract-core/src/layout/figure.rs (517 lines)
+- crates/pdftract-core/src/layout/caption.rs (342 lines)
+- crates/pdftract-core/src/layout/mod.rs (exports classifiers)
 
-## Retrospective
-
-### What worked
-- The existing implementation is clean, well-tested, and follows the bead specification exactly
-- Sweep line algorithm for text overlap union is mathematically correct
-- Test coverage is comprehensive with edge cases (thresholds, empty contexts, multiple figures)
-
-### What didn't
-- N/A - implementation was already complete and passing
-
-### Surprise
-- The bead was already fully implemented despite being in the ready queue
-- Both modules share a common `Block` type via `pub use` from caption.rs
-
-### Reusable pattern
-- The sweep line algorithm in `compute_text_overlap_area` is a reusable pattern for union rectangle area computation
-- The `classify_caption` pattern of checking: (1) font metric, (2) spatial relationship, (3) column membership is a template for other block classifiers
+## Verification Status
+**ALL ACCEPTANCE CRITERIA PASS** - Implementation complete and tested.