Split the sections that hold the evidence, on a Judge (HAL-1374) - #66
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… Judge HAL-1374. A 10-K's tree is fine where nothing is and coarse where everything is: Items 1B–4 are a paragraph each, Item 8 and its notes are 70 pages under one title. Retrieval pays for it, and "Item 8" is not a citation. TOCBuilder.SplitLeavesOver splits any leaf spanning more pages than that at its own headings, the way the top level was built: code lists candidates, the Judge confirms. Two sources, in order of trust — a nested contents page inside the leaf (Item 8's "Index to the Consolidated Financial Statements"), parsed, confirmed and resolved exactly like the document's contents; failing that, heading-shaped lines, short and line-opening and not repeated across pages, each judged with the lines that follow it. Sub-leaves get the parent's structure prefix and derive their end pages under the parent's. tocdump -split N.
…ng at five sections On a 10-K split into ~80 sub-leaves, MaxLeaves=5 gathered five one-page notes and read 3–8 pages of a 40-page budget; hits fell 33 → 31 with the right sections in the tree. Sections are now taken in rank order until the coarse budget is gathered; MaxLeaves is an optional cap. The splitter no longer emits the parent's own title as a sub-leaf.
…y confidence The one-per-two-pages cap decided every split — 68 leaves per filing at T=8, 12 and 20 alike — and kept the earliest headings, not the best. Headings found without an index now get about one sub-leaf per half threshold of pages, the most confident kept, then page order.
… by default at 20 pages Sub-leaves began at the first confirmed heading, so the pages before it — Item 8's index and the auditor's report — belonged to no leaf, and a gold page there was inside nothing (47/47 → 39/47 on the tightened run). The section's opening is now its first sub-leaf. The half-threshold budget dropped real headings; one sub-leaf per two pages, the most confident kept, is restored. Splitting defaults to 20 pages whenever a Judge is set: at 8, 12 and 20 navigation was alike (right section 40/40, evidence 36/40) and 20 costs the least.
…t forced, and the opening-gap bug
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Reviewer's GuideThis PR makes oversized filing sections more granular by deriving Judge-confirmed sub-leaves from nested contents pages or internal headings, preserves otherwise-unassigned opening pages, and updates navigation to use the available page budget across ranked sections. The default 20-page split improves section selection and citation locality in the reported FinanceBench evaluation, at the cost of additional TOC-stage Judge calls, latency, and spend. Sequence diagram for Judge-confirmed section splittingsequenceDiagram
participant Builder as TOCBuilder
participant Pages as FilingPages
participant Judge
participant Tree as TOCTree
Builder->>Tree: Build
Builder->>Pages: Find pages inside oversized leaf
Pages-->>Builder: Leaf text and page spans
Builder->>Pages: Find nested contents or heading-shaped lines
Pages-->>Builder: Candidate entries
Builder->>Judge: Judge candidate headings
Judge-->>Builder: Confirmation probabilities
Builder->>Tree: Add confirmed sub-leaves
Builder->>Tree: Add opening sub-leaf when needed
Builder->>Tree: Derive child end pages
Flow diagram for Judge-confirmed leaf splittingflowchart TD
A[TOCBuilder.Build] --> B[Derive leaf end pages]
B --> C{Leaf exceeds split threshold?}
C -->|No| D[Keep leaf]
C -->|Yes| E[Find nested contents or heading candidates]
E --> F[Judge confirms candidates]
F --> G{At least two sub-sections?}
G -->|No| D
G -->|Yes| H[Add opening pages as parent-titled sub-leaf]
H --> I[Keep ranked sub-leaves within page cap]
I --> J[Derive child end pages and stamp node IDs]
Flow diagram for page-budget-driven navigationflowchart TD
A[Rank candidate sections] --> B[Select next section in rank order]
B --> C[Gather section pages]
C --> D{Page budget gathered?}
D -->|No| B
D -->|Yes| E[Judge gathered pages up to MaxPages]
D -->|No sections remain| E
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No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info⚙️ Run configurationConfiguration used: defaults Review profile: CHILL Plan: Advanced Run ID: 📒 Files selected for processing (4)
🚧 Files skipped from review as they are similar to previous changes (4)
Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review. 📝 WalkthroughWalkthroughThe change adds Judge-confirmed splitting for oversized TOC leaves, exposes split configuration in ChangesLeaf Granularity and Navigation
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~45 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant tocdump
participant TOCBuilder
participant DocumentPages
participant Judge
tocdump->>TOCBuilder: configure SplitLeavesOver
TOCBuilder->>DocumentPages: derive TOC leaf pages
TOCBuilder->>Judge: confirm contents or heading candidates
Judge-->>TOCBuilder: return candidate judgments
TOCBuilder-->>tocdump: return sub-leaf TOC
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 42.11% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 19 functions across 7 files. (1 skipped: 1 unsupported.)
✨ Finishing Touches 💡 2📝 Generate docstrings 💡
🛠️ Fix failing CI checks 💡
🧪 Generate unit tests (beta)
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Actionable comments posted: 4
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Inline comments:
In `@docs/evaluations/2026-09-19-leaf-granularity.md`:
- Around line 36-39: Update the threshold-result summary to match the reported
values of 69, 67, and 68 leaves per filing for thresholds 8, 12, and 20,
respectively, and state the aggregation method if presenting a single summary
figure.
In `@pkg/ingest/toc_builder.go`:
- Line 286: The log message in the split-leaf reporting path should record the
resolved threshold actually used for splitting. Update the log.Printf call to
use the local over value instead of b.SplitLeavesOver, preserving the existing
message and counters.
In `@pkg/ingest/toc_split.go`:
- Around line 222-228: The heading-candidate flow currently stores only the
first occurrence in first[key], preventing Judge evaluation of later occurrences
that may begin the real subsection. Preserve every candidate occurrence for
Judge evaluation, use seenOnPages solely to filter running headers, and
deduplicate only the results accepted by Judge.
- Around line 349-361: Update the candidate selection flow around the sort and
seenPage deduplication to retain only the highest-confidence heading for each
StartPage before applying the max cap. After truncating to max candidates,
restore the selected nodes to page order so downstream split behavior remains
ordered.
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📒 Files selected for processing (8)
cmd/navbench/main.gocmd/tocdump/main.godocs/evaluations/2026-09-19-leaf-granularity.mdpkg/ingest/toc_builder.gopkg/ingest/toc_split.gopkg/ingest/toc_split_test.gopkg/retrieval/judgewalk.gopkg/retrieval/judgewalk_test.go
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…the cap; log the resolved threshold; leaf counts stated per threshold
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Closes HAL-1374.
A 10-K's tree is fine where nothing is and coarse where everything is.
TOCBuilder.SplitLeavesOver(default 20 pages when a Judge is set, negative to disable) splits a big leaf at its own headings — a nested contents page when there is one, otherwise heading-shaped lines the Judge confirms — with the section's opening as its first sub-leaf.judgewalknow takes sections in rank order until the page budget is full instead of stopping at five.FinanceBench, 21 filings, 40 questions (evaluation):
Cost is in the TOC stage: ~13 Judge requests per filing against 3, about $0.006 against $0.0007, and 489 s wall at parallel 8 against 122 s.
The sweep is in the evaluation: the navigator fix it forced (5 sections → the page budget), the per-page cap that made every threshold identical, and the tightened budget that lost coverage by leaving a section's opening pages in no leaf. Local suite green; CI red is the billing lock (HAL-1354).
Summary by Sourcery
Improve evidence retrieval by making oversized document sections more granular and allowing navigation to use the available page budget effectively.
New Features:
Bug Fixes:
Enhancements:
Documentation:
Tests:
Summary by CodeRabbit
New Features
Bug Fixes
Documentation