[P2] end_session concepts_covered always empty for agent-path chats (agent-migration regression, audit #13) · Issue #326 · SaplingLearn/Sapling

Severity: MEDIUM · Source: docs/backend-contract-bug-audit.md finding #13 · Split out of umbrella #127

Regression introduced when routes moved from legacy <graph_update> XML parsing to Pydantic AI tools.

Problem

end_session derives concepts_covered entirely from the per-message graph_update_json column, but the agent chat path never populates it — so concepts_covered is always [] for agent-path chats.

Verified on `main` (2026-07-08)

backend/routes/learn.py:581 — _chat_via_agent returns graph_update: {} / mastery_changes: [].
backend/routes/learn.py:693 — chat() agent path calls save_message(session_id, "assistant", reply) with no graph_update → graph_update_json stays NULL.
backend/routes/learn.py:745-753 — end_session builds concepts_covered from msg["graph_update_json"], so it derives to zero.

Note: a docstring at learn.py:514-518 now rationalizes the empty return as intentional ("frontend reducer accepts empty gracefully") — it only addresses the frontend, not end_session, and must be reconciled with the fix.

Fix

Accumulate what the graph tools merged during the run (e.g. a graph_updates list on SaplingDeps) and pass it to save_message so graph_update_json is populated — or derive concepts_covered from the graph nodes touched during the session.

Status

Fix in flight in PR #243 — adds the graph_updates accumulator on SaplingDeps and persists it. Needs rebase onto current main. PR should Closes this issue.

Umbrella: #127.

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SaplingLearn /SaplingPublic Notifications You must be signed in to change notification settings Fork 0 Star 2 Code Issues22 Pull requests13 Actions Projects Security and quality0 Insights Additional navigation options Code Issues Pull requests Actions Projects Security and quality Insights [P2] end_session concepts_covered always empty for agent-path chats (agent-migration regression, audit #13) #326 Copy link Copy link Closed #243 Closed [P2] end_session concepts_covered always empty for agent-path chats (agent-migration regression, audit #13)#326 #243 Copy link Assignees Labels P2Medium priorityMedium priorityagentsPydantic AI agents / LLM layerPydantic AI agents / LLM layerbackendBackend / APIBackend / APIbugSomething isn't workingSomething isn't working Description AndresL230 opened on Jul 8, 2026 Issue body actions Severity: MEDIUM · Source: docs/backend-contract-bug-audit.md finding #13 · Split out of umbrella #127 Regression introduced when routes moved from legacy <graph_update> XML parsing to Pydantic AI tools. Problem end_session derives concepts_covered entirely from the per-message graph_update_json column, but the agent chat path never populates it — so concepts_covered is always [] for agent-path chats. Verified on main (2026-07-08) backend/routes/learn.py:581 — _chat_via_agent returns graph_update: {} / mastery_changes: []. backend/routes/learn.py:693 — chat() agent path calls save_message(session_id, "assistant", reply) with no graph_update → graph_update_json stays NULL. backend/routes/learn.py:745-753 — end_session builds concepts_covered from msg["graph_update_json"], so it derives to zero. Note: a docstring at learn.py:514-518 now rationalizes the empty return as intentional ("frontend reducer accepts empty gracefully") — it only addresses the frontend, not end_session, and must be reconciled with the fix. Fix Accumulate what the graph tools merged during the run (e.g. a graph_updates list on SaplingDeps) and pass it to save_message so graph_update_json is populated — or derive concepts_covered from the graph nodes touched during the session. Status Fix in flight in PR #243 — adds the graph_updates accumulator on SaplingDeps and persists it. Needs rebase onto current main. PR should Closes this issue. Umbrella: #127. Reactions are currently unavailable Metadata Metadata Assignees Darkest-Teddy Labels P2Medium priorityMedium priorityagentsPydantic AI agents / LLM layerPydantic AI agents / LLM layerbackendBackend / APIBackend / APIbugSomething isn't workingSomething isn't working Type No type Projects No projects Milestone No milestone Relationships None yet Development No branches or pull requests Issue actions Footer © 2026 GitHub, Inc. Footer navigation Terms Privacy Security Status Community Docs Contact You can’t perform that action at this time. , '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 contentNavigation Menu Sign inAppearance settings AI CODE CREATIONGitHub CopilotWrite better code with AI GitHub Copilot appDirect agents from issue to merge MCP RegistryIntegrate external tools DEVELOPER WORKFLOWSActionsAutomate any workflow CodespacesInstant dev environments IssuesPlan and track work Code ReviewManage code changes Code QualityEnforce quality at merge APPLICATION SECURITYGitHub Advanced SecurityFind and fix vulnerabilities Code securitySecure your code as you build Secret protectionStop leaks before they start EXPLOREWhy GitHub Documentation Blog Changelog Marketplace View all features BY COMPANY SIZEEnterprises Small and medium teams Startups Nonprofits BY USE CASEApp Modernization DevSecOps DevOps CI/CD View all use cases BY INDUSTRYHealthcare Financial services Manufacturing Government View all industries View all solutions EXPLORE BY TOPICAI Software Development DevOps Security View all topics EXPLORE BY TYPECustomer stories Events & webinars Ebooks & reports Business insights GitHub Skills SUPPORT & SERVICESDocumentation Customer support Community forum Trust center Partners View all resources COMMUNITYGitHub SponsorsFund open source developers PROGRAMSSecurity Lab Maintainer Community GitHub Stars Archive Program REPOSITORIESTopics Trending Collections ENTERPRISE SOLUTIONSEnterprise platformAI-powered developer platform AVAILABLE ADD-ONSGitHub Advanced SecurityEnterprise-grade security features Copilot for BusinessEnterprise-grade AI features Premium SupportEnterprise-grade 24/7 support Pricing Sign in Sign upAppearance settings You signed in with another tab or window. 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SaplingLearn /SaplingPublic Notifications You must be signed in to change notification settings Fork 0 Star 2 Code Issues22 Pull requests13 Actions Projects Security and quality0 Insights Additional navigation options Code Issues Pull requests Actions Projects Security and quality Insights [P2] end_session concepts_covered always empty for agent-path chats (agent-migration regression, audit #13) #326 Copy link Copy link Closed #243 Closed [P2] end_session concepts_covered always empty for agent-path chats (agent-migration regression, audit #13)#326 #243 Copy link Assignees Labels P2Medium priorityMedium priorityagentsPydantic AI agents / LLM layerPydantic AI agents / LLM layerbackendBackend / APIBackend / APIbugSomething isn't workingSomething isn't working Description AndresL230 opened on Jul 8, 2026 Issue body actions Severity: MEDIUM · Source: docs/backend-contract-bug-audit.md finding #13 · Split out of umbrella #127 Regression introduced when routes moved from legacy <graph_update> XML parsing to Pydantic AI tools. Problem end_session derives concepts_covered entirely from the per-message graph_update_json column, but the agent chat path never populates it — so concepts_covered is always [] for agent-path chats. Verified on main (2026-07-08) backend/routes/learn.py:581 — _chat_via_agent returns graph_update: {} / mastery_changes: []. backend/routes/learn.py:693 — chat() agent path calls save_message(session_id, "assistant", reply) with no graph_update → graph_update_json stays NULL. backend/routes/learn.py:745-753 — end_session builds concepts_covered from msg["graph_update_json"], so it derives to zero. Note: a docstring at learn.py:514-518 now rationalizes the empty return as intentional ("frontend reducer accepts empty gracefully") — it only addresses the frontend, not end_session, and must be reconciled with the fix. Fix Accumulate what the graph tools merged during the run (e.g. a graph_updates list on SaplingDeps) and pass it to save_message so graph_update_json is populated — or derive concepts_covered from the graph nodes touched during the session. Status Fix in flight in PR #243 — adds the graph_updates accumulator on SaplingDeps and persists it. Needs rebase onto current main. PR should Closes this issue. Umbrella: #127. Reactions are currently unavailable Metadata Metadata Assignees Darkest-Teddy Labels P2Medium priorityMedium priorityagentsPydantic AI agents / LLM layerPydantic AI agents / LLM layerbackendBackend / APIBackend / APIbugSomething isn't workingSomething isn't working Type No type Projects No projects Milestone No milestone Relationships None yet Development No branches or pull requests Issue actions Footer © 2026 GitHub, Inc. Footer navigation Terms Privacy Security Status Community Docs Contact You can’t perform that action at this time. , '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 contentNavigation Menu Sign inAppearance settings AI CODE CREATIONGitHub CopilotWrite better code with AI GitHub Copilot appDirect agents from issue to merge MCP RegistryIntegrate external tools DEVELOPER WORKFLOWSActionsAutomate any workflow CodespacesInstant dev environments IssuesPlan and track work Code ReviewManage code changes Code QualityEnforce quality at merge APPLICATION SECURITYGitHub Advanced SecurityFind and fix vulnerabilities Code securitySecure your code as you build Secret protectionStop leaks before they start EXPLOREWhy GitHub Documentation Blog Changelog Marketplace View all features BY COMPANY SIZEEnterprises Small and medium teams Startups Nonprofits BY USE CASEApp Modernization DevSecOps DevOps CI/CD View all use cases BY INDUSTRYHealthcare Financial services Manufacturing Government View all industries View all solutions EXPLORE BY TOPICAI Software Development DevOps Security View all topics EXPLORE BY TYPECustomer stories Events & webinars Ebooks & reports Business insights GitHub Skills SUPPORT & SERVICESDocumentation Customer support Community forum Trust center Partners View all resources COMMUNITYGitHub SponsorsFund open source developers PROGRAMSSecurity Lab Maintainer Community GitHub Stars Archive Program REPOSITORIESTopics Trending Collections ENTERPRISE SOLUTIONSEnterprise platformAI-powered developer platform AVAILABLE ADD-ONSGitHub Advanced SecurityEnterprise-grade security features Copilot for BusinessEnterprise-grade AI features Premium SupportEnterprise-grade 24/7 support Pricing Sign in Sign upAppearance settings You signed in with another tab or window. 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SaplingLearn /SaplingPublic Notifications You must be signed in to change notification settings Fork 0 Star 2 Code Issues22 Pull requests13 Actions Projects Security and quality0 Insights Additional navigation options Code Issues Pull requests Actions Projects Security and quality Insights [P2] end_session concepts_covered always empty for agent-path chats (agent-migration regression, audit #13) #326 Copy link Copy link Closed #243 Closed [P2] end_session concepts_covered always empty for agent-path chats (agent-migration regression, audit #13)#326 #243 Copy link Assignees Labels P2Medium priorityMedium priorityagentsPydantic AI agents / LLM layerPydantic AI agents / LLM layerbackendBackend / APIBackend / APIbugSomething isn't workingSomething isn't working Description AndresL230 opened on Jul 8, 2026 Issue body actions Severity: MEDIUM · Source: docs/backend-contract-bug-audit.md finding #13 · Split out of umbrella #127 Regression introduced when routes moved from legacy <graph_update> XML parsing to Pydantic AI tools. Problem end_session derives concepts_covered entirely from the per-message graph_update_json column, but the agent chat path never populates it — so concepts_covered is always [] for agent-path chats. Verified on main (2026-07-08) backend/routes/learn.py:581 — _chat_via_agent returns graph_update: {} / mastery_changes: []. backend/routes/learn.py:693 — chat() agent path calls save_message(session_id, "assistant", reply) with no graph_update → graph_update_json stays NULL. backend/routes/learn.py:745-753 — end_session builds concepts_covered from msg["graph_update_json"], so it derives to zero. Note: a docstring at learn.py:514-518 now rationalizes the empty return as intentional ("frontend reducer accepts empty gracefully") — it only addresses the frontend, not end_session, and must be reconciled with the fix. Fix Accumulate what the graph tools merged during the run (e.g. a graph_updates list on SaplingDeps) and pass it to save_message so graph_update_json is populated — or derive concepts_covered from the graph nodes touched during the session. Status Fix in flight in PR #243 — adds the graph_updates accumulator on SaplingDeps and persists it. Needs rebase onto current main. PR should Closes this issue. Umbrella: #127. Reactions are currently unavailable Metadata Metadata Assignees Darkest-Teddy Labels P2Medium priorityMedium priorityagentsPydantic AI agents / LLM layerPydantic AI agents / LLM layerbackendBackend / APIBackend / APIbugSomething isn't workingSomething isn't working Type No type Projects No projects Milestone No milestone Relationships None yet Development No branches or pull requests Issue actions Footer © 2026 GitHub, Inc. Footer navigation Terms Privacy Security Status Community Docs Contact You can’t perform that action at this time. , '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 contentNavigation Menu Sign inAppearance settings AI CODE CREATIONGitHub CopilotWrite better code with AI GitHub Copilot appDirect agents from issue to merge MCP RegistryIntegrate external tools DEVELOPER WORKFLOWSActionsAutomate any workflow CodespacesInstant dev environments IssuesPlan and track work Code ReviewManage code changes Code QualityEnforce quality at merge APPLICATION SECURITYGitHub Advanced SecurityFind and fix vulnerabilities Code securitySecure your code as you build Secret protectionStop leaks before they start EXPLOREWhy GitHub Documentation Blog Changelog Marketplace View all features BY COMPANY SIZEEnterprises Small and medium teams Startups Nonprofits BY USE CASEApp Modernization DevSecOps DevOps CI/CD View all use cases BY INDUSTRYHealthcare Financial services Manufacturing Government View all industries View all solutions EXPLORE BY TOPICAI Software Development DevOps Security View all topics EXPLORE BY TYPECustomer stories Events & webinars Ebooks & reports Business insights GitHub Skills SUPPORT & SERVICESDocumentation Customer support Community forum Trust center Partners View all resources COMMUNITYGitHub SponsorsFund open source developers PROGRAMSSecurity Lab Maintainer Community GitHub Stars Archive Program REPOSITORIESTopics Trending Collections ENTERPRISE SOLUTIONSEnterprise platformAI-powered developer platform AVAILABLE ADD-ONSGitHub Advanced SecurityEnterprise-grade security features Copilot for BusinessEnterprise-grade AI features Premium SupportEnterprise-grade 24/7 support Pricing Sign in Sign upAppearance settings You signed in with another tab or window. 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SaplingLearn /SaplingPublic Notifications You must be signed in to change notification settings Fork 0 Star 2 Code Issues22 Pull requests13 Actions Projects Security and quality0 Insights Additional navigation options Code Issues Pull requests Actions Projects Security and quality Insights [P2] end_session concepts_covered always empty for agent-path chats (agent-migration regression, audit #13) #326 Copy link Copy link Closed #243 Closed [P2] end_session concepts_covered always empty for agent-path chats (agent-migration regression, audit #13)#326 #243 Copy link Assignees Labels P2Medium priorityMedium priorityagentsPydantic AI agents / LLM layerPydantic AI agents / LLM layerbackendBackend / APIBackend / APIbugSomething isn't workingSomething isn't working Description AndresL230 opened on Jul 8, 2026 Issue body actions Severity: MEDIUM · Source: docs/backend-contract-bug-audit.md finding #13 · Split out of umbrella #127 Regression introduced when routes moved from legacy <graph_update> XML parsing to Pydantic AI tools. Problem end_session derives concepts_covered entirely from the per-message graph_update_json column, but the agent chat path never populates it — so concepts_covered is always [] for agent-path chats. Verified on main (2026-07-08) backend/routes/learn.py:581 — _chat_via_agent returns graph_update: {} / mastery_changes: []. backend/routes/learn.py:693 — chat() agent path calls save_message(session_id, "assistant", reply) with no graph_update → graph_update_json stays NULL. backend/routes/learn.py:745-753 — end_session builds concepts_covered from msg["graph_update_json"], so it derives to zero. Note: a docstring at learn.py:514-518 now rationalizes the empty return as intentional ("frontend reducer accepts empty gracefully") — it only addresses the frontend, not end_session, and must be reconciled with the fix. Fix Accumulate what the graph tools merged during the run (e.g. a graph_updates list on SaplingDeps) and pass it to save_message so graph_update_json is populated — or derive concepts_covered from the graph nodes touched during the session. Status Fix in flight in PR #243 — adds the graph_updates accumulator on SaplingDeps and persists it. Needs rebase onto current main. PR should Closes this issue. Umbrella: #127. Reactions are currently unavailable Metadata Metadata Assignees Darkest-Teddy Labels P2Medium priorityMedium priorityagentsPydantic AI agents / LLM layerPydantic AI agents / LLM layerbackendBackend / APIBackend / APIbugSomething isn't workingSomething isn't working Type No type Projects No projects Milestone No milestone Relationships None yet Development No branches or pull requests Issue actions Footer © 2026 GitHub, Inc. Footer navigation Terms Privacy Security Status Community Docs Contact You can’t perform that action at this time. , '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 contentNavigation Menu Sign inAppearance settings AI CODE CREATIONGitHub CopilotWrite better code with AI GitHub Copilot appDirect agents from issue to merge MCP RegistryIntegrate external tools DEVELOPER WORKFLOWSActionsAutomate any workflow CodespacesInstant dev environments IssuesPlan and track work Code ReviewManage code changes Code QualityEnforce quality at merge APPLICATION SECURITYGitHub Advanced SecurityFind and fix vulnerabilities Code securitySecure your code as you build Secret protectionStop leaks before they start EXPLOREWhy GitHub Documentation Blog Changelog Marketplace View all features BY COMPANY SIZEEnterprises Small and medium teams Startups Nonprofits BY USE CASEApp Modernization DevSecOps DevOps CI/CD View all use cases BY INDUSTRYHealthcare Financial services Manufacturing Government View all industries View all solutions EXPLORE BY TOPICAI Software Development DevOps Security View all topics EXPLORE BY TYPECustomer stories Events & webinars Ebooks & reports Business insights GitHub Skills SUPPORT & SERVICESDocumentation Customer support Community forum Trust center Partners View all resources COMMUNITYGitHub SponsorsFund open source developers PROGRAMSSecurity Lab Maintainer Community GitHub Stars Archive Program REPOSITORIESTopics Trending Collections ENTERPRISE SOLUTIONSEnterprise platformAI-powered developer platform AVAILABLE ADD-ONSGitHub Advanced SecurityEnterprise-grade security features Copilot for BusinessEnterprise-grade AI features Premium SupportEnterprise-grade 24/7 support Pricing Sign in Sign upAppearance settings You signed in with another tab or window. Reload to refresh your session.You signed out in another tab or window. Reload to refresh your session.You switched accounts on another tab or window. Reload to refresh your session.Dismiss alert Uh oh! There was an error while loading. Please reload this page. SaplingLearn /SaplingPublic Notifications You must be signed in to change notification settings Fork 0 Star 2 Code Issues22 Pull requests13 Actions Projects Security and quality0 Insights Additional navigation options Code Issues Pull requests Actions Projects Security and quality Insights [P2] end_session concepts_covered always empty for agent-path chats (agent-migration regression, audit #13) #326 Copy link Copy link Closed #243 Closed [P2] end_session concepts_covered always empty for agent-path chats (agent-migration regression, audit #13)#326 #243 Copy link Assignees Labels P2Medium priorityMedium priorityagentsPydantic AI agents / LLM layerPydantic AI agents / LLM layerbackendBackend / APIBackend / APIbugSomething isn't workingSomething isn't working Description AndresL230 opened on Jul 8, 2026 Issue body actions Severity: MEDIUM · Source: docs/backend-contract-bug-audit.md finding #13 · Split out of umbrella #127 Regression introduced when routes moved from legacy <graph_update> XML parsing to Pydantic AI tools. Problem end_session derives concepts_covered entirely from the per-message graph_update_json column, but the agent chat path never populates it — so concepts_covered is always [] for agent-path chats. Verified on main (2026-07-08) backend/routes/learn.py:581 — _chat_via_agent returns graph_update: {} / mastery_changes: []. backend/routes/learn.py:693 — chat() agent path calls save_message(session_id, "assistant", reply) with no graph_update → graph_update_json stays NULL. backend/routes/learn.py:745-753 — end_session builds concepts_covered from msg["graph_update_json"], so it derives to zero. Note: a docstring at learn.py:514-518 now rationalizes the empty return as intentional ("frontend reducer accepts empty gracefully") — it only addresses the frontend, not end_session, and must be reconciled with the fix. Fix Accumulate what the graph tools merged during the run (e.g. a graph_updates list on SaplingDeps) and pass it to save_message so graph_update_json is populated — or derive concepts_covered from the graph nodes touched during the session. Status Fix in flight in PR #243 — adds the graph_updates accumulator on SaplingDeps and persists it. Needs rebase onto current main. PR should Closes this issue. Umbrella: #127. Reactions are currently unavailable Metadata Metadata Assignees Darkest-Teddy Labels P2Medium priorityMedium priorityagentsPydantic AI agents / LLM layerPydantic AI agents / LLM layerbackendBackend / APIBackend / APIbugSomething isn't workingSomething isn't working Type No type Projects No projects Milestone No milestone Relationships None yet Development No branches or pull requests Issue actions Footer © 2026 GitHub, Inc. Footer navigation Terms Privacy Security Status Community Docs Contact You can’t perform that action at this time. , '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 contentNavigation Menu Sign inAppearance settings AI CODE CREATIONGitHub CopilotWrite better code with AI GitHub Copilot appDirect agents from issue to merge MCP RegistryIntegrate external tools DEVELOPER WORKFLOWSActionsAutomate any workflow CodespacesInstant dev environments IssuesPlan and track work Code ReviewManage code changes Code QualityEnforce quality at merge APPLICATION SECURITYGitHub Advanced SecurityFind and fix vulnerabilities Code securitySecure your code as you build Secret protectionStop leaks before they start EXPLOREWhy GitHub Documentation Blog Changelog Marketplace View all features BY COMPANY SIZEEnterprises Small and medium teams Startups Nonprofits BY USE CASEApp Modernization DevSecOps DevOps CI/CD View all use cases BY INDUSTRYHealthcare Financial services Manufacturing Government View all industries View all solutions EXPLORE BY TOPICAI Software Development DevOps Security View all topics EXPLORE BY TYPECustomer stories Events & webinars Ebooks & reports Business insights GitHub Skills SUPPORT & SERVICESDocumentation Customer support Community forum Trust center Partners View all resources COMMUNITYGitHub SponsorsFund open source developers PROGRAMSSecurity Lab Maintainer Community GitHub Stars Archive Program REPOSITORIESTopics Trending Collections ENTERPRISE SOLUTIONSEnterprise platformAI-powered developer platform AVAILABLE ADD-ONSGitHub Advanced SecurityEnterprise-grade security features Copilot for BusinessEnterprise-grade AI features Premium SupportEnterprise-grade 24/7 support Pricing Sign in Sign upAppearance settings You signed in with another tab or window. 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SaplingLearn /SaplingPublic Notifications You must be signed in to change notification settings Fork 0 Star 2 Code Issues22 Pull requests13 Actions Projects Security and quality0 Insights Additional navigation options Code Issues Pull requests Actions Projects Security and quality Insights [P2] end_session concepts_covered always empty for agent-path chats (agent-migration regression, audit #13) #326 Copy link Copy link Closed #243 Closed [P2] end_session concepts_covered always empty for agent-path chats (agent-migration regression, audit #13)#326 #243 Copy link Assignees Labels P2Medium priorityMedium priorityagentsPydantic AI agents / LLM layerPydantic AI agents / LLM layerbackendBackend / APIBackend / APIbugSomething isn't workingSomething isn't working Description AndresL230 opened on Jul 8, 2026 Issue body actions Severity: MEDIUM · Source: docs/backend-contract-bug-audit.md finding #13 · Split out of umbrella #127 Regression introduced when routes moved from legacy <graph_update> XML parsing to Pydantic AI tools. Problem end_session derives concepts_covered entirely from the per-message graph_update_json column, but the agent chat path never populates it — so concepts_covered is always [] for agent-path chats. Verified on main (2026-07-08) backend/routes/learn.py:581 — _chat_via_agent returns graph_update: {} / mastery_changes: []. backend/routes/learn.py:693 — chat() agent path calls save_message(session_id, "assistant", reply) with no graph_update → graph_update_json stays NULL. backend/routes/learn.py:745-753 — end_session builds concepts_covered from msg["graph_update_json"], so it derives to zero. Note: a docstring at learn.py:514-518 now rationalizes the empty return as intentional ("frontend reducer accepts empty gracefully") — it only addresses the frontend, not end_session, and must be reconciled with the fix. Fix Accumulate what the graph tools merged during the run (e.g. a graph_updates list on SaplingDeps) and pass it to save_message so graph_update_json is populated — or derive concepts_covered from the graph nodes touched during the session. Status Fix in flight in PR #243 — adds the graph_updates accumulator on SaplingDeps and persists it. Needs rebase onto current main. PR should Closes this issue. Umbrella: #127. Reactions are currently unavailable Metadata Metadata Assignees Darkest-Teddy Labels P2Medium priorityMedium priorityagentsPydantic AI agents / LLM layerPydantic AI agents / LLM layerbackendBackend / APIBackend / APIbugSomething isn't workingSomething isn't working Type No type Projects No projects Milestone No milestone Relationships None yet Development No branches or pull requests Issue actions Footer © 2026 GitHub, Inc. Footer navigation Terms Privacy Security Status Community Docs Contact You can’t perform that action at this time. , '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 contentNavigation Menu Sign inAppearance settings AI CODE CREATIONGitHub CopilotWrite better code with AI GitHub Copilot appDirect agents from issue to merge MCP RegistryIntegrate external tools DEVELOPER WORKFLOWSActionsAutomate any workflow CodespacesInstant dev environments IssuesPlan and track work Code ReviewManage code changes Code QualityEnforce quality at merge APPLICATION SECURITYGitHub Advanced SecurityFind and fix vulnerabilities Code securitySecure your code as you build Secret protectionStop leaks before they start EXPLOREWhy GitHub Documentation Blog Changelog Marketplace View all features BY COMPANY SIZEEnterprises Small and medium teams Startups Nonprofits BY USE CASEApp Modernization DevSecOps DevOps CI/CD View all use cases BY INDUSTRYHealthcare Financial services Manufacturing Government View all industries View all solutions EXPLORE BY TOPICAI Software Development DevOps Security View all topics EXPLORE BY TYPECustomer stories Events & webinars Ebooks & reports Business insights GitHub Skills SUPPORT & SERVICESDocumentation Customer support Community forum Trust center Partners View all resources COMMUNITYGitHub SponsorsFund open source developers PROGRAMSSecurity Lab Maintainer Community GitHub Stars Archive Program REPOSITORIESTopics Trending Collections ENTERPRISE SOLUTIONSEnterprise platformAI-powered developer platform AVAILABLE ADD-ONSGitHub Advanced SecurityEnterprise-grade security features Copilot for BusinessEnterprise-grade AI features Premium SupportEnterprise-grade 24/7 support Pricing Sign in Sign upAppearance settings You signed in with another tab or window. Reload to refresh your session.You signed out in another tab or window. Reload to refresh your session.You switched accounts on another tab or window. Reload to refresh your session.Dismiss alert Uh oh! There was an error while loading. Please reload this page. SaplingLearn /SaplingPublic Notifications You must be signed in to change notification settings Fork 0 Star 2 Code Issues22 Pull requests13 Actions Projects Security and quality0 Insights Additional navigation options Code Issues Pull requests Actions Projects Security and quality Insights [P2] end_session concepts_covered always empty for agent-path chats (agent-migration regression, audit #13) #326 Copy link Copy link Closed #243 Closed [P2] end_session concepts_covered always empty for agent-path chats (agent-migration regression, audit #13)#326 #243 Copy link Assignees Labels P2Medium priorityMedium priorityagentsPydantic AI agents / LLM layerPydantic AI agents / LLM layerbackendBackend / APIBackend / APIbugSomething isn't workingSomething isn't working Description AndresL230 opened on Jul 8, 2026 Issue body actions Severity: MEDIUM · Source: docs/backend-contract-bug-audit.md finding #13 · Split out of umbrella #127 Regression introduced when routes moved from legacy <graph_update> XML parsing to Pydantic AI tools. Problem end_session derives concepts_covered entirely from the per-message graph_update_json column, but the agent chat path never populates it — so concepts_covered is always [] for agent-path chats. Verified on main (2026-07-08) backend/routes/learn.py:581 — _chat_via_agent returns graph_update: {} / mastery_changes: []. backend/routes/learn.py:693 — chat() agent path calls save_message(session_id, "assistant", reply) with no graph_update → graph_update_json stays NULL. backend/routes/learn.py:745-753 — end_session builds concepts_covered from msg["graph_update_json"], so it derives to zero. Note: a docstring at learn.py:514-518 now rationalizes the empty return as intentional ("frontend reducer accepts empty gracefully") — it only addresses the frontend, not end_session, and must be reconciled with the fix. Fix Accumulate what the graph tools merged during the run (e.g. a graph_updates list on SaplingDeps) and pass it to save_message so graph_update_json is populated — or derive concepts_covered from the graph nodes touched during the session. Status Fix in flight in PR #243 — adds the graph_updates accumulator on SaplingDeps and persists it. Needs rebase onto current main. PR should Closes this issue. Umbrella: #127. Reactions are currently unavailable Metadata Metadata Assignees Darkest-Teddy Labels P2Medium priorityMedium priorityagentsPydantic AI agents / LLM layerPydantic AI agents / LLM layerbackendBackend / APIBackend / APIbugSomething isn't workingSomething isn't working Type No type Projects No projects Milestone No milestone Relationships None yet Development No branches or pull requests Issue actions Footer © 2026 GitHub, Inc. Footer navigation Terms Privacy Security Status Community Docs Contact You can’t perform that action at this time.