Chapter 11 - #1188

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Chapter 11#1188
henrydingliu merged 8 commits into
casact:chapter_11_parkingfrom
henrydingliu:chapter_11

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Summary of Changes

Related GitHub Issue(s)

Additional Context for Reviewers

Checklist

  • I passed tests locally for both code (uv run pytest) and documentation changes (uv run --directory docs jb build . --builder=custom --custom-builder=doctest)

Note

Low Risk
Changes are limited to docs, sample data, and display/assert tweaks in the Chapter 11 notebook with no production API changes.

Overview
Updates the Friedland Chapter 11 notebook so exhibit tables match the book’s formatting: format_exh now accepts a date_format argument (default year-only), and half-year auto examples pass {:%Y%m} for accident periods. LDF average tables drop the index name via rename_axis(""), and several Exhibit III sheets route severity/frequency summaries through format_exh instead of ad hoc rounding or transposed raw frames.

The friedland_auto_freq_sev sample CSV is normalized (numbered rows) and one reported-severity cell is corrected (4683 → 4638). Exhibit IV’s on-level Triangle is built with cumulative=True, and one Friedland reconciliation assert switches from absolute to relative tolerance.

Reviewed by Cursor Bugbot for commit dd18092. Bugbot is set up for automated code reviews on this repo. Configure here.

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Pyright Type Completeness

View the full pyright --verifytypes output for this commit

Project (full chainladder package, at this PR's head): 15.0% of exported symbols fully typed (196 / 1308)

KnownAmbiguousUnknownTotal
Project (head)19611110011308

Other symbols referenced but not exported by chainladder: 13

KnownAmbiguousUnknownTotal
Other (head)31913

Symbols without documentation:

  • Functions without docstring: 315
  • Functions without default param: 0
  • Classes without docstring: 10

Patch (exported symbols added or changed by this PR): no exported symbol type-completeness changes detected.

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.20%. Comparing base (cba3b81) to head (dd18092).
⚠️ Report is 12 commits behind head on chapter_11_parking.

Additional details and impacted files
@@ Coverage Diff @@## chapter_11_parking #1188 +/- ##
===================================================
Coverage 91.20% 91.20% ===================================================
Files 91 91 Lines 5380 5380 Branches 683 683 ===================================================
Hits 4907 4907 - Misses 339 343 +4 + Partials 134 130 -4
FlagCoverage Δ
unittests91.20% <ø> (ø)

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📢 Have feedback on the report? Share it here.

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
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}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
Chapter 11 - #1188
Merged
henrydingliu merged 8 commits into
casact:chapter_11_parkingfrom 
henrydingliu:chapter_11
Aug 3, 2026
Merged
Chapter 11#1188
henrydingliu merged 8 commits into
casact:chapter_11_parkingfrom 
henrydingliu:chapter_11
Conversation
@henrydingliu
@henrydingliuhenrydingliu
commented
Aug 3, 2026•

edited by cursor
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Summary of Changes
Related GitHub Issue(s)
Additional Context for Reviewers
Checklist
  •  I passed tests locally for both code (uv run pytest) and documentation changes (uv run --directory docs jb build . --builder=custom --custom-builder=doctest)
Note
Low Risk

Changes are limited to docs, sample data, and display/assert tweaks in the Chapter 11 notebook with no production API changes.
Overview

Updates the Friedland Chapter 11 notebook so exhibit tables match the book’s formatting: format_exh now accepts a date_format argument (default year-only), and half-year auto examples pass {:%Y%m} for accident periods. LDF average tables drop the index name via rename_axis(""), and several Exhibit III sheets route severity/frequency summaries through format_exh instead of ad hoc rounding or transposed raw frames.
The friedland_auto_freq_sev sample CSV is normalized (numbered rows) and one reported-severity cell is corrected (4683 → 4638). Exhibit IV’s on-level Triangle is built with cumulative=True, and one Friedland reconciliation assert switches from absolute to relative tolerance.
Reviewed by Cursor Bugbot for commit dd18092. Bugbot is set up for automated code reviews on this repo. Configure here.
@henrydingliu
henrydingliu
merged commit 901ded6
into
casact:chapter_11_parkingAug 3, 2026

9 of 10 checks passed

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Pyright Type Completeness
View the full pyright --verifytypes output for this commit
Project (full chainladder package, at this PR's head): 15.0% of exported symbols fully typed (196 / 1308)
KnownAmbiguousUnknownTotal
Project (head)19611110011308
Other symbols referenced but not exported by chainladder: 13
KnownAmbiguousUnknownTotal
Other (head)31913
Symbols without documentation:
  • Functions without docstring: 315
  • Functions without default param: 0
  • Classes without docstring: 10
Patch (exported symbols added or changed by this PR): no exported symbol type-completeness changes detected.
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Codecov Report
✅ All modified and coverable lines are covered by tests.

✅ Project coverage is 91.20%. Comparing base (cba3b81) to head (dd18092).
⚠️ Report is 12 commits behind head on chapter_11_parking.
Additional details and impacted files
@@ Coverage Diff @@## chapter_11_parking #1188 +/- ##
===================================================
Coverage 91.20% 91.20% ===================================================
Files 91 91 Lines 5380 5380 Branches 683 683 ===================================================
Hits 4907 4907 - Misses 339 343 +4 + Partials 134 130 -4 
FlagCoverage Δ
unittests91.20% <ø> (ø)
Flags with carried forward coverage won't be shown. Click here to find out more.
☔ View full report in Codecov by Harness.

📢 Have feedback on the report? Share it here.
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Chapter 11 - #1188
Merged
henrydingliu merged 8 commits into
casact:chapter_11_parkingfrom 
henrydingliu:chapter_11
Aug 3, 2026
Merged
Chapter 11#1188
henrydingliu merged 8 commits into
casact:chapter_11_parkingfrom 
henrydingliu:chapter_11
Conversation
@henrydingliu
@henrydingliuhenrydingliu
commented
Aug 3, 2026•

edited by cursor
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Summary of Changes
Related GitHub Issue(s)
Additional Context for Reviewers
Checklist
  •  I passed tests locally for both code (uv run pytest) and documentation changes (uv run --directory docs jb build . --builder=custom --custom-builder=doctest)
Note
Low Risk

Changes are limited to docs, sample data, and display/assert tweaks in the Chapter 11 notebook with no production API changes.
Overview

Updates the Friedland Chapter 11 notebook so exhibit tables match the book’s formatting: format_exh now accepts a date_format argument (default year-only), and half-year auto examples pass {:%Y%m} for accident periods. LDF average tables drop the index name via rename_axis(""), and several Exhibit III sheets route severity/frequency summaries through format_exh instead of ad hoc rounding or transposed raw frames.
The friedland_auto_freq_sev sample CSV is normalized (numbered rows) and one reported-severity cell is corrected (4683 → 4638). Exhibit IV’s on-level Triangle is built with cumulative=True, and one Friedland reconciliation assert switches from absolute to relative tolerance.
Reviewed by Cursor Bugbot for commit dd18092. Bugbot is set up for automated code reviews on this repo. Configure here.
@henrydingliu
henrydingliu
merged commit 901ded6
into
casact:chapter_11_parkingAug 3, 2026

9 of 10 checks passed

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Aug 3, 2026

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Pyright Type Completeness
View the full pyright --verifytypes output for this commit
Project (full chainladder package, at this PR's head): 15.0% of exported symbols fully typed (196 / 1308)
KnownAmbiguousUnknownTotal
Project (head)19611110011308
Other symbols referenced but not exported by chainladder: 13
KnownAmbiguousUnknownTotal
Other (head)31913
Symbols without documentation:
  • Functions without docstring: 315
  • Functions without default param: 0
  • Classes without docstring: 10
Patch (exported symbols added or changed by this PR): no exported symbol type-completeness changes detected.
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Codecov Report
✅ All modified and coverable lines are covered by tests.

✅ Project coverage is 91.20%. Comparing base (cba3b81) to head (dd18092).
⚠️ Report is 12 commits behind head on chapter_11_parking.
Additional details and impacted files
@@ Coverage Diff @@## chapter_11_parking #1188 +/- ##
===================================================
Coverage 91.20% 91.20% ===================================================
Files 91 91 Lines 5380 5380 Branches 683 683 ===================================================
Hits 4907 4907 - Misses 339 343 +4 + Partials 134 130 -4 
FlagCoverage Δ
unittests91.20% <ø> (ø)
Flags with carried forward coverage won't be shown. Click here to find out more.
☔ View full report in Codecov by Harness.

📢 Have feedback on the report? Share it here.
 🚀 New features to boost your workflow: 
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@jbogaardtjbogaardtAwaiting requested review from jbogaardtjbogaardt is a code owner
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Chapter 11 - #1188
Merged
henrydingliu merged 8 commits into
casact:chapter_11_parkingfrom 
henrydingliu:chapter_11
Aug 3, 2026
Merged
Chapter 11#1188
henrydingliu merged 8 commits into
casact:chapter_11_parkingfrom 
henrydingliu:chapter_11
Conversation
@henrydingliu
@henrydingliuhenrydingliu
commented
Aug 3, 2026•

edited by cursor
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Summary of Changes
Related GitHub Issue(s)
Additional Context for Reviewers
Checklist
  •  I passed tests locally for both code (uv run pytest) and documentation changes (uv run --directory docs jb build . --builder=custom --custom-builder=doctest)
Note
Low Risk

Changes are limited to docs, sample data, and display/assert tweaks in the Chapter 11 notebook with no production API changes.
Overview

Updates the Friedland Chapter 11 notebook so exhibit tables match the book’s formatting: format_exh now accepts a date_format argument (default year-only), and half-year auto examples pass {:%Y%m} for accident periods. LDF average tables drop the index name via rename_axis(""), and several Exhibit III sheets route severity/frequency summaries through format_exh instead of ad hoc rounding or transposed raw frames.
The friedland_auto_freq_sev sample CSV is normalized (numbered rows) and one reported-severity cell is corrected (4683 → 4638). Exhibit IV’s on-level Triangle is built with cumulative=True, and one Friedland reconciliation assert switches from absolute to relative tolerance.
Reviewed by Cursor Bugbot for commit dd18092. Bugbot is set up for automated code reviews on this repo. Configure here.
@henrydingliu
henrydingliu
merged commit 901ded6
into
casact:chapter_11_parkingAug 3, 2026

9 of 10 checks passed

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Pyright Type Completeness
View the full pyright --verifytypes output for this commit
Project (full chainladder package, at this PR's head): 15.0% of exported symbols fully typed (196 / 1308)
KnownAmbiguousUnknownTotal
Project (head)19611110011308
Other symbols referenced but not exported by chainladder: 13
KnownAmbiguousUnknownTotal
Other (head)31913
Symbols without documentation:
  • Functions without docstring: 315
  • Functions without default param: 0
  • Classes without docstring: 10
Patch (exported symbols added or changed by this PR): no exported symbol type-completeness changes detected.
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Codecov Report
✅ All modified and coverable lines are covered by tests.

✅ Project coverage is 91.20%. Comparing base (cba3b81) to head (dd18092).
⚠️ Report is 12 commits behind head on chapter_11_parking.
Additional details and impacted files
@@ Coverage Diff @@## chapter_11_parking #1188 +/- ##
===================================================
Coverage 91.20% 91.20% ===================================================
Files 91 91 Lines 5380 5380 Branches 683 683 ===================================================
Hits 4907 4907 - Misses 339 343 +4 + Partials 134 130 -4 
FlagCoverage Δ
unittests91.20% <ø> (ø)
Flags with carried forward coverage won't be shown. Click here to find out more.
☔ View full report in Codecov by Harness.

📢 Have feedback on the report? Share it here.
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
Chapter 11 - #1188
Merged
henrydingliu merged 8 commits into
casact:chapter_11_parkingfrom 
henrydingliu:chapter_11
Aug 3, 2026
Merged
Chapter 11#1188
henrydingliu merged 8 commits into
casact:chapter_11_parkingfrom 
henrydingliu:chapter_11
Conversation
@henrydingliu
@henrydingliuhenrydingliu
commented
Aug 3, 2026•

edited by cursor
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Summary of Changes
Related GitHub Issue(s)
Additional Context for Reviewers
Checklist
  •  I passed tests locally for both code (uv run pytest) and documentation changes (uv run --directory docs jb build . --builder=custom --custom-builder=doctest)
Note
Low Risk

Changes are limited to docs, sample data, and display/assert tweaks in the Chapter 11 notebook with no production API changes.
Overview

Updates the Friedland Chapter 11 notebook so exhibit tables match the book’s formatting: format_exh now accepts a date_format argument (default year-only), and half-year auto examples pass {:%Y%m} for accident periods. LDF average tables drop the index name via rename_axis(""), and several Exhibit III sheets route severity/frequency summaries through format_exh instead of ad hoc rounding or transposed raw frames.
The friedland_auto_freq_sev sample CSV is normalized (numbered rows) and one reported-severity cell is corrected (4683 → 4638). Exhibit IV’s on-level Triangle is built with cumulative=True, and one Friedland reconciliation assert switches from absolute to relative tolerance.
Reviewed by Cursor Bugbot for commit dd18092. Bugbot is set up for automated code reviews on this repo. Configure here.
@henrydingliu
henrydingliu
merged commit 901ded6
into
casact:chapter_11_parkingAug 3, 2026

9 of 10 checks passed

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Pyright Type Completeness
View the full pyright --verifytypes output for this commit
Project (full chainladder package, at this PR's head): 15.0% of exported symbols fully typed (196 / 1308)
KnownAmbiguousUnknownTotal
Project (head)19611110011308
Other symbols referenced but not exported by chainladder: 13
KnownAmbiguousUnknownTotal
Other (head)31913
Symbols without documentation:
  • Functions without docstring: 315
  • Functions without default param: 0
  • Classes without docstring: 10
Patch (exported symbols added or changed by this PR): no exported symbol type-completeness changes detected.
@codecov
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Codecov Report
✅ All modified and coverable lines are covered by tests.

✅ Project coverage is 91.20%. Comparing base (cba3b81) to head (dd18092).
⚠️ Report is 12 commits behind head on chapter_11_parking.
Additional details and impacted files
@@ Coverage Diff @@## chapter_11_parking #1188 +/- ##
===================================================
Coverage 91.20% 91.20% ===================================================
Files 91 91 Lines 5380 5380 Branches 683 683 ===================================================
Hits 4907 4907 - Misses 339 343 +4 + Partials 134 130 -4 
FlagCoverage Δ
unittests91.20% <ø> (ø)
Flags with carried forward coverage won't be shown. Click here to find out more.
☔ View full report in Codecov by Harness.

📢 Have feedback on the report? Share it here.
 🚀 New features to boost your workflow: 
  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
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Reviewers

@jbogaardtjbogaardtAwaiting requested review from jbogaardtjbogaardt is a code owner
@kennethshsukennethshsuAwaiting requested review from kennethshsukennethshsu is a code owner
@genedangenedanAwaiting requested review from genedangenedan is a code owner

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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Chapter 11 - #1188
Merged
henrydingliu merged 8 commits into
casact:chapter_11_parkingfrom 
henrydingliu:chapter_11
Aug 3, 2026
Merged
Chapter 11#1188
henrydingliu merged 8 commits into
casact:chapter_11_parkingfrom 
henrydingliu:chapter_11
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@henrydingliu
@henrydingliuhenrydingliu
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Aug 3, 2026•

edited by cursor
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Summary of Changes
Related GitHub Issue(s)
Additional Context for Reviewers
Checklist
  •  I passed tests locally for both code (uv run pytest) and documentation changes (uv run --directory docs jb build . --builder=custom --custom-builder=doctest)
Note
Low Risk

Changes are limited to docs, sample data, and display/assert tweaks in the Chapter 11 notebook with no production API changes.
Overview

Updates the Friedland Chapter 11 notebook so exhibit tables match the book’s formatting: format_exh now accepts a date_format argument (default year-only), and half-year auto examples pass {:%Y%m} for accident periods. LDF average tables drop the index name via rename_axis(""), and several Exhibit III sheets route severity/frequency summaries through format_exh instead of ad hoc rounding or transposed raw frames.
The friedland_auto_freq_sev sample CSV is normalized (numbered rows) and one reported-severity cell is corrected (4683 → 4638). Exhibit IV’s on-level Triangle is built with cumulative=True, and one Friedland reconciliation assert switches from absolute to relative tolerance.
Reviewed by Cursor Bugbot for commit dd18092. Bugbot is set up for automated code reviews on this repo. Configure here.
@henrydingliu
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merged commit 901ded6
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casact:chapter_11_parkingAug 3, 2026

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Pyright Type Completeness
View the full pyright --verifytypes output for this commit
Project (full chainladder package, at this PR's head): 15.0% of exported symbols fully typed (196 / 1308)
KnownAmbiguousUnknownTotal
Project (head)19611110011308
Other symbols referenced but not exported by chainladder: 13
KnownAmbiguousUnknownTotal
Other (head)31913
Symbols without documentation:
  • Functions without docstring: 315
  • Functions without default param: 0
  • Classes without docstring: 10
Patch (exported symbols added or changed by this PR): no exported symbol type-completeness changes detected.
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Codecov Report
✅ All modified and coverable lines are covered by tests.

✅ Project coverage is 91.20%. Comparing base (cba3b81) to head (dd18092).
⚠️ Report is 12 commits behind head on chapter_11_parking.
Additional details and impacted files
@@ Coverage Diff @@## chapter_11_parking #1188 +/- ##
===================================================
Coverage 91.20% 91.20% ===================================================
Files 91 91 Lines 5380 5380 Branches 683 683 ===================================================
Hits 4907 4907 - Misses 339 343 +4 + Partials 134 130 -4 
FlagCoverage Δ
unittests91.20% <ø> (ø)
Flags with carried forward coverage won't be shown. Click here to find out more.
☔ View full report in Codecov by Harness.

📢 Have feedback on the report? Share it here.
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@jbogaardtjbogaardtAwaiting requested review from jbogaardtjbogaardt is a code owner
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Chapter 11 - #1188
Merged
henrydingliu merged 8 commits into
casact:chapter_11_parkingfrom 
henrydingliu:chapter_11
Aug 3, 2026
Merged
Chapter 11#1188
henrydingliu merged 8 commits into
casact:chapter_11_parkingfrom 
henrydingliu:chapter_11
Conversation
@henrydingliu
@henrydingliuhenrydingliu
commented
Aug 3, 2026•

edited by cursor
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Summary of Changes
Related GitHub Issue(s)
Additional Context for Reviewers
Checklist
  •  I passed tests locally for both code (uv run pytest) and documentation changes (uv run --directory docs jb build . --builder=custom --custom-builder=doctest)
Note
Low Risk

Changes are limited to docs, sample data, and display/assert tweaks in the Chapter 11 notebook with no production API changes.
Overview

Updates the Friedland Chapter 11 notebook so exhibit tables match the book’s formatting: format_exh now accepts a date_format argument (default year-only), and half-year auto examples pass {:%Y%m} for accident periods. LDF average tables drop the index name via rename_axis(""), and several Exhibit III sheets route severity/frequency summaries through format_exh instead of ad hoc rounding or transposed raw frames.
The friedland_auto_freq_sev sample CSV is normalized (numbered rows) and one reported-severity cell is corrected (4683 → 4638). Exhibit IV’s on-level Triangle is built with cumulative=True, and one Friedland reconciliation assert switches from absolute to relative tolerance.
Reviewed by Cursor Bugbot for commit dd18092. Bugbot is set up for automated code reviews on this repo. Configure here.
@henrydingliu
henrydingliu
merged commit 901ded6
into
casact:chapter_11_parkingAug 3, 2026

9 of 10 checks passed

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Pyright Type Completeness
View the full pyright --verifytypes output for this commit
Project (full chainladder package, at this PR's head): 15.0% of exported symbols fully typed (196 / 1308)
KnownAmbiguousUnknownTotal
Project (head)19611110011308
Other symbols referenced but not exported by chainladder: 13
KnownAmbiguousUnknownTotal
Other (head)31913
Symbols without documentation:
  • Functions without docstring: 315
  • Functions without default param: 0
  • Classes without docstring: 10
Patch (exported symbols added or changed by this PR): no exported symbol type-completeness changes detected.
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Codecov Report
✅ All modified and coverable lines are covered by tests.

✅ Project coverage is 91.20%. Comparing base (cba3b81) to head (dd18092).
⚠️ Report is 12 commits behind head on chapter_11_parking.
Additional details and impacted files
@@ Coverage Diff @@## chapter_11_parking #1188 +/- ##
===================================================
Coverage 91.20% 91.20% ===================================================
Files 91 91 Lines 5380 5380 Branches 683 683 ===================================================
Hits 4907 4907 - Misses 339 343 +4 + Partials 134 130 -4 
FlagCoverage Δ
unittests91.20% <ø> (ø)
Flags with carried forward coverage won't be shown. Click here to find out more.
☔ View full report in Codecov by Harness.

📢 Have feedback on the report? Share it here.
 🚀 New features to boost your workflow: 
  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
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@jbogaardtjbogaardtAwaiting requested review from jbogaardtjbogaardt is a code owner
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

Skip to content
Chapter 11 - #1188
Merged
henrydingliu merged 8 commits into
casact:chapter_11_parkingfrom 
henrydingliu:chapter_11
Aug 3, 2026
Merged
Chapter 11#1188
henrydingliu merged 8 commits into
casact:chapter_11_parkingfrom 
henrydingliu:chapter_11
Conversation
@henrydingliu
@henrydingliuhenrydingliu
commented
Aug 3, 2026•

edited by cursor
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Summary of Changes
Related GitHub Issue(s)
Additional Context for Reviewers
Checklist
  •  I passed tests locally for both code (uv run pytest) and documentation changes (uv run --directory docs jb build . --builder=custom --custom-builder=doctest)
Note
Low Risk

Changes are limited to docs, sample data, and display/assert tweaks in the Chapter 11 notebook with no production API changes.
Overview

Updates the Friedland Chapter 11 notebook so exhibit tables match the book’s formatting: format_exh now accepts a date_format argument (default year-only), and half-year auto examples pass {:%Y%m} for accident periods. LDF average tables drop the index name via rename_axis(""), and several Exhibit III sheets route severity/frequency summaries through format_exh instead of ad hoc rounding or transposed raw frames.
The friedland_auto_freq_sev sample CSV is normalized (numbered rows) and one reported-severity cell is corrected (4683 → 4638). Exhibit IV’s on-level Triangle is built with cumulative=True, and one Friedland reconciliation assert switches from absolute to relative tolerance.
Reviewed by Cursor Bugbot for commit dd18092. Bugbot is set up for automated code reviews on this repo. Configure here.
@henrydingliu
henrydingliu
merged commit 901ded6
into
casact:chapter_11_parkingAug 3, 2026

9 of 10 checks passed

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Aug 3, 2026

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Pyright Type Completeness
View the full pyright --verifytypes output for this commit
Project (full chainladder package, at this PR's head): 15.0% of exported symbols fully typed (196 / 1308)
KnownAmbiguousUnknownTotal
Project (head)19611110011308
Other symbols referenced but not exported by chainladder: 13
KnownAmbiguousUnknownTotal
Other (head)31913
Symbols without documentation:
  • Functions without docstring: 315
  • Functions without default param: 0
  • Classes without docstring: 10
Patch (exported symbols added or changed by this PR): no exported symbol type-completeness changes detected.
@codecov
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Aug 3, 2026

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Codecov Report
✅ All modified and coverable lines are covered by tests.

✅ Project coverage is 91.20%. Comparing base (cba3b81) to head (dd18092).
⚠️ Report is 12 commits behind head on chapter_11_parking.
Additional details and impacted files
@@ Coverage Diff @@## chapter_11_parking #1188 +/- ##
===================================================
Coverage 91.20% 91.20% ===================================================
Files 91 91 Lines 5380 5380 Branches 683 683 ===================================================
Hits 4907 4907 - Misses 339 343 +4 + Partials 134 130 -4 
FlagCoverage Δ
unittests91.20% <ø> (ø)
Flags with carried forward coverage won't be shown. Click here to find out more.
☔ View full report in Codecov by Harness.

📢 Have feedback on the report? Share it here.
 🚀 New features to boost your workflow: 
  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
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Reviewers

@jbogaardtjbogaardtAwaiting requested review from jbogaardtjbogaardt is a code owner
@kennethshsukennethshsuAwaiting requested review from kennethshsukennethshsu is a code owner
@genedangenedanAwaiting requested review from genedangenedan is a code owner

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