.NET: Python: declarative workflow DevUI sample broken — wrong expression namespaces and JoinExecutor single-Message gap #7285

Open
Bug
#7839
Open
.NET: Python: declarative workflow DevUI sample broken — wrong expression namespaces and JoinExecutor single-Message gap#7285
Bug
#7839
Labels
.NETUsage: [Issues, PRs], Target: .NetdevuiUsage: [Issues, PRs], Target: DevUIpythonUsage: [Issues, PRs], Target: PythonreproducedUsage: [Issues], Target: all issues that can be reproduced by the triage workflow

Description

@amit12cool
Amit Dhawan (amit12cool)
opened on Jul 23, 2026

Bug Report

Summary

The workflow_declarative DevUI sample under python/samples/02-agents/devui/workflow_declarative/ always returns "child" regardless of the age entered via the DevUI chat interface.

Root Causes

  1. workflow.yaml uses =inputs.age — this only works with structured dict input (e.g. {"age": 25}). The DevUI sends chat text, which populates System.LastMessage.Text, not Inputs.age. So =inputs.age is always Blank (treated as 0), causing 0 < 13 → True → "child" for all input.
  2. workflow.yaml uses the turn.* namespace — a .NET/Bot Framework convention. The Python runtime uses Local.* for per-turn variables.
  3. workflow.yaml references workflow.outputs.category (lowercase w) — the Python state engine is case-sensitive; the correct namespace is Workflow.Outputs.*.
  4. JoinExecutor does not handle a single Message trigger — when a Message (not list[Message]) is passed as the trigger, _ensure_state_initialized cannot extract user text into System.LastMessage.Text, compounding issue 1.

Steps to Reproduce

  1. Start the DevUI sample: python workflow.py
  2. Open the DevUI chat
  3. Enter any age (e.g. 25)
  4. Observe the agent always responds with "child"

Expected Behavior

The agent correctly categorizes the user based on age (child / teen / adult).

Environment

  • Python Agent Framework
  • python/samples/02-agents/devui/workflow_declarative/

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    .NETUsage: [Issues, PRs], Target: .NetdevuiUsage: [Issues, PRs], Target: DevUIpythonUsage: [Issues, PRs], Target: PythonreproducedUsage: [Issues], Target: all issues that can be reproduced by the triage workflow

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    Bug

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    , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
     blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} 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
    .NET: Python: declarative workflow DevUI sample broken — wrong expression namespaces and JoinExecutor single-Message gap #7285
    Open
    Bug
    #7839
    Open
    .NET: Python: declarative workflow DevUI sample broken — wrong expression namespaces and JoinExecutor single-Message gap#7285
    Bug
    #7839
    Labels
    .NETUsage: [Issues, PRs], Target: .NetdevuiUsage: [Issues, PRs], Target: DevUIpythonUsage: [Issues, PRs], Target: PythonreproducedUsage: [Issues], Target: all issues that can be reproduced by the triage workflow
    Description
    @amit12cool
    Amit Dhawan (amit12cool)
    opened on Jul 23, 2026
    Bug Report
    Summary
    The workflow_declarative DevUI sample under python/samples/02-agents/devui/workflow_declarative/ always returns "child" regardless of the age entered via the DevUI chat interface.
    Root Causes
    1. workflow.yaml uses =inputs.age — this only works with structured dict input (e.g. {"age": 25}). The DevUI sends chat text, which populates System.LastMessage.Text, not Inputs.age. So =inputs.age is always Blank (treated as 0), causing 0 < 13 → True → "child" for all input.
    2. workflow.yaml uses the turn.* namespace — a .NET/Bot Framework convention. The Python runtime uses Local.* for per-turn variables.
    3. workflow.yaml references workflow.outputs.category (lowercase w) — the Python state engine is case-sensitive; the correct namespace is Workflow.Outputs.*.
    4. JoinExecutor does not handle a single Message trigger — when a Message (not list[Message]) is passed as the trigger, _ensure_state_initialized cannot extract user text into System.LastMessage.Text, compounding issue 1.
    Steps to Reproduce
    1. Start the DevUI sample: python workflow.py
    2. Open the DevUI chat
    3. Enter any age (e.g. 25)
    4. Observe the agent always responds with "child"
    Expected Behavior
    The agent correctly categorizes the user based on age (child / teen / adult).
    Environment
    • Python Agent Framework
    • python/samples/02-agents/devui/workflow_declarative/
    Metadata
    Metadata
    Assignees
    No one assigned
      Labels
      .NETUsage: [Issues, PRs], Target: .NetdevuiUsage: [Issues, PRs], Target: DevUIpythonUsage: [Issues, PRs], Target: PythonreproducedUsage: [Issues], Target: all issues that can be reproduced by the triage workflow
      Type
      Bug
      Projects
      Milestone
      No milestone
      Relationships
      None yet
      Development
      No branches or pull requests
      Issue actions
      
, '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
      .NET: Python: declarative workflow DevUI sample broken — wrong expression namespaces and JoinExecutor single-Message gap #7285
      Open
      Bug
      #7839
      Open
      .NET: Python: declarative workflow DevUI sample broken — wrong expression namespaces and JoinExecutor single-Message gap#7285
      Bug
      #7839
      Labels
      .NETUsage: [Issues, PRs], Target: .NetdevuiUsage: [Issues, PRs], Target: DevUIpythonUsage: [Issues, PRs], Target: PythonreproducedUsage: [Issues], Target: all issues that can be reproduced by the triage workflow
      Description
      @amit12cool
      Amit Dhawan (amit12cool)
      opened on Jul 23, 2026
      Bug Report
      Summary
      The workflow_declarative DevUI sample under python/samples/02-agents/devui/workflow_declarative/ always returns "child" regardless of the age entered via the DevUI chat interface.
      Root Causes
      1. workflow.yaml uses =inputs.age — this only works with structured dict input (e.g. {"age": 25}). The DevUI sends chat text, which populates System.LastMessage.Text, not Inputs.age. So =inputs.age is always Blank (treated as 0), causing 0 < 13 → True → "child" for all input.
      2. workflow.yaml uses the turn.* namespace — a .NET/Bot Framework convention. The Python runtime uses Local.* for per-turn variables.
      3. workflow.yaml references workflow.outputs.category (lowercase w) — the Python state engine is case-sensitive; the correct namespace is Workflow.Outputs.*.
      4. JoinExecutor does not handle a single Message trigger — when a Message (not list[Message]) is passed as the trigger, _ensure_state_initialized cannot extract user text into System.LastMessage.Text, compounding issue 1.
      Steps to Reproduce
      1. Start the DevUI sample: python workflow.py
      2. Open the DevUI chat
      3. Enter any age (e.g. 25)
      4. Observe the agent always responds with "child"
      Expected Behavior
      The agent correctly categorizes the user based on age (child / teen / adult).
      Environment
      • Python Agent Framework
      • python/samples/02-agents/devui/workflow_declarative/
      Metadata
      Metadata
      Assignees
      No one assigned
        Labels
        .NETUsage: [Issues, PRs], Target: .NetdevuiUsage: [Issues, PRs], Target: DevUIpythonUsage: [Issues, PRs], Target: PythonreproducedUsage: [Issues], Target: all issues that can be reproduced by the triage workflow
        Type
        Bug
        Projects
        Milestone
        No milestone
        Relationships
        None yet
        Development
        No branches or pull requests
        Issue actions
        
, '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
        .NET: Python: declarative workflow DevUI sample broken — wrong expression namespaces and JoinExecutor single-Message gap #7285
        Open
        Bug
        #7839
        Open
        .NET: Python: declarative workflow DevUI sample broken — wrong expression namespaces and JoinExecutor single-Message gap#7285
        Bug
        #7839
        Labels
        .NETUsage: [Issues, PRs], Target: .NetdevuiUsage: [Issues, PRs], Target: DevUIpythonUsage: [Issues, PRs], Target: PythonreproducedUsage: [Issues], Target: all issues that can be reproduced by the triage workflow
        Description
        @amit12cool
        Amit Dhawan (amit12cool)
        opened on Jul 23, 2026
        Bug Report
        Summary
        The workflow_declarative DevUI sample under python/samples/02-agents/devui/workflow_declarative/ always returns "child" regardless of the age entered via the DevUI chat interface.
        Root Causes
        1. workflow.yaml uses =inputs.age — this only works with structured dict input (e.g. {"age": 25}). The DevUI sends chat text, which populates System.LastMessage.Text, not Inputs.age. So =inputs.age is always Blank (treated as 0), causing 0 < 13 → True → "child" for all input.
        2. workflow.yaml uses the turn.* namespace — a .NET/Bot Framework convention. The Python runtime uses Local.* for per-turn variables.
        3. workflow.yaml references workflow.outputs.category (lowercase w) — the Python state engine is case-sensitive; the correct namespace is Workflow.Outputs.*.
        4. JoinExecutor does not handle a single Message trigger — when a Message (not list[Message]) is passed as the trigger, _ensure_state_initialized cannot extract user text into System.LastMessage.Text, compounding issue 1.
        Steps to Reproduce
        1. Start the DevUI sample: python workflow.py
        2. Open the DevUI chat
        3. Enter any age (e.g. 25)
        4. Observe the agent always responds with "child"
        Expected Behavior
        The agent correctly categorizes the user based on age (child / teen / adult).
        Environment
        • Python Agent Framework
        • python/samples/02-agents/devui/workflow_declarative/
        Metadata
        Metadata
        Assignees
        No one assigned
          Labels
          .NETUsage: [Issues, PRs], Target: .NetdevuiUsage: [Issues, PRs], Target: DevUIpythonUsage: [Issues, PRs], Target: PythonreproducedUsage: [Issues], Target: all issues that can be reproduced by the triage workflow
          Type
          Bug
          Projects
          Milestone
          No milestone
          Relationships
          None yet
          Development
          No branches or pull requests
          Issue actions
          
, '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
          .NET: Python: declarative workflow DevUI sample broken — wrong expression namespaces and JoinExecutor single-Message gap #7285
          Open
          Bug
          #7839
          Open
          .NET: Python: declarative workflow DevUI sample broken — wrong expression namespaces and JoinExecutor single-Message gap#7285
          Bug
          #7839
          Labels
          .NETUsage: [Issues, PRs], Target: .NetdevuiUsage: [Issues, PRs], Target: DevUIpythonUsage: [Issues, PRs], Target: PythonreproducedUsage: [Issues], Target: all issues that can be reproduced by the triage workflow
          Description
          @amit12cool
          Amit Dhawan (amit12cool)
          opened on Jul 23, 2026
          Bug Report
          Summary
          The workflow_declarative DevUI sample under python/samples/02-agents/devui/workflow_declarative/ always returns "child" regardless of the age entered via the DevUI chat interface.
          Root Causes
          1. workflow.yaml uses =inputs.age — this only works with structured dict input (e.g. {"age": 25}). The DevUI sends chat text, which populates System.LastMessage.Text, not Inputs.age. So =inputs.age is always Blank (treated as 0), causing 0 < 13 → True → "child" for all input.
          2. workflow.yaml uses the turn.* namespace — a .NET/Bot Framework convention. The Python runtime uses Local.* for per-turn variables.
          3. workflow.yaml references workflow.outputs.category (lowercase w) — the Python state engine is case-sensitive; the correct namespace is Workflow.Outputs.*.
          4. JoinExecutor does not handle a single Message trigger — when a Message (not list[Message]) is passed as the trigger, _ensure_state_initialized cannot extract user text into System.LastMessage.Text, compounding issue 1.
          Steps to Reproduce
          1. Start the DevUI sample: python workflow.py
          2. Open the DevUI chat
          3. Enter any age (e.g. 25)
          4. Observe the agent always responds with "child"
          Expected Behavior
          The agent correctly categorizes the user based on age (child / teen / adult).
          Environment
          • Python Agent Framework
          • python/samples/02-agents/devui/workflow_declarative/
          Metadata
          Metadata
          Assignees
          No one assigned
            Labels
            .NETUsage: [Issues, PRs], Target: .NetdevuiUsage: [Issues, PRs], Target: DevUIpythonUsage: [Issues, PRs], Target: PythonreproducedUsage: [Issues], Target: all issues that can be reproduced by the triage workflow
            Type
            Bug
            Projects
            Milestone
            No milestone
            Relationships
            None yet
            Development
            No branches or pull requests
            Issue actions
            
, '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
            .NET: Python: declarative workflow DevUI sample broken — wrong expression namespaces and JoinExecutor single-Message gap #7285
            Open
            Bug
            #7839
            Open
            .NET: Python: declarative workflow DevUI sample broken — wrong expression namespaces and JoinExecutor single-Message gap#7285
            Bug
            #7839
            Labels
            .NETUsage: [Issues, PRs], Target: .NetdevuiUsage: [Issues, PRs], Target: DevUIpythonUsage: [Issues, PRs], Target: PythonreproducedUsage: [Issues], Target: all issues that can be reproduced by the triage workflow
            Description
            @amit12cool
            Amit Dhawan (amit12cool)
            opened on Jul 23, 2026
            Bug Report
            Summary
            The workflow_declarative DevUI sample under python/samples/02-agents/devui/workflow_declarative/ always returns "child" regardless of the age entered via the DevUI chat interface.
            Root Causes
            1. workflow.yaml uses =inputs.age — this only works with structured dict input (e.g. {"age": 25}). The DevUI sends chat text, which populates System.LastMessage.Text, not Inputs.age. So =inputs.age is always Blank (treated as 0), causing 0 < 13 → True → "child" for all input.
            2. workflow.yaml uses the turn.* namespace — a .NET/Bot Framework convention. The Python runtime uses Local.* for per-turn variables.
            3. workflow.yaml references workflow.outputs.category (lowercase w) — the Python state engine is case-sensitive; the correct namespace is Workflow.Outputs.*.
            4. JoinExecutor does not handle a single Message trigger — when a Message (not list[Message]) is passed as the trigger, _ensure_state_initialized cannot extract user text into System.LastMessage.Text, compounding issue 1.
            Steps to Reproduce
            1. Start the DevUI sample: python workflow.py
            2. Open the DevUI chat
            3. Enter any age (e.g. 25)
            4. Observe the agent always responds with "child"
            Expected Behavior
            The agent correctly categorizes the user based on age (child / teen / adult).
            Environment
            • Python Agent Framework
            • python/samples/02-agents/devui/workflow_declarative/
            Metadata
            Metadata
            Assignees
            No one assigned
              Labels
              .NETUsage: [Issues, PRs], Target: .NetdevuiUsage: [Issues, PRs], Target: DevUIpythonUsage: [Issues, PRs], Target: PythonreproducedUsage: [Issues], Target: all issues that can be reproduced by the triage workflow
              Type
              Bug
              Projects
              Milestone
              No milestone
              Relationships
              None yet
              Development
              No branches or pull requests
              Issue actions
              
, '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
              .NET: Python: declarative workflow DevUI sample broken — wrong expression namespaces and JoinExecutor single-Message gap #7285
              Open
              Bug
              #7839
              Open
              .NET: Python: declarative workflow DevUI sample broken — wrong expression namespaces and JoinExecutor single-Message gap#7285
              Bug
              #7839
              Labels
              .NETUsage: [Issues, PRs], Target: .NetdevuiUsage: [Issues, PRs], Target: DevUIpythonUsage: [Issues, PRs], Target: PythonreproducedUsage: [Issues], Target: all issues that can be reproduced by the triage workflow
              Description
              @amit12cool
              Amit Dhawan (amit12cool)
              opened on Jul 23, 2026
              Bug Report
              Summary
              The workflow_declarative DevUI sample under python/samples/02-agents/devui/workflow_declarative/ always returns "child" regardless of the age entered via the DevUI chat interface.
              Root Causes
              1. workflow.yaml uses =inputs.age — this only works with structured dict input (e.g. {"age": 25}). The DevUI sends chat text, which populates System.LastMessage.Text, not Inputs.age. So =inputs.age is always Blank (treated as 0), causing 0 < 13 → True → "child" for all input.
              2. workflow.yaml uses the turn.* namespace — a .NET/Bot Framework convention. The Python runtime uses Local.* for per-turn variables.
              3. workflow.yaml references workflow.outputs.category (lowercase w) — the Python state engine is case-sensitive; the correct namespace is Workflow.Outputs.*.
              4. JoinExecutor does not handle a single Message trigger — when a Message (not list[Message]) is passed as the trigger, _ensure_state_initialized cannot extract user text into System.LastMessage.Text, compounding issue 1.
              Steps to Reproduce
              1. Start the DevUI sample: python workflow.py
              2. Open the DevUI chat
              3. Enter any age (e.g. 25)
              4. Observe the agent always responds with "child"
              Expected Behavior
              The agent correctly categorizes the user based on age (child / teen / adult).
              Environment
              • Python Agent Framework
              • python/samples/02-agents/devui/workflow_declarative/
              Metadata
              Metadata
              Assignees
              No one assigned
                Labels
                .NETUsage: [Issues, PRs], Target: .NetdevuiUsage: [Issues, PRs], Target: DevUIpythonUsage: [Issues, PRs], Target: PythonreproducedUsage: [Issues], Target: all issues that can be reproduced by the triage workflow
                Type
                Bug
                Projects
                Milestone
                No milestone
                Relationships
                None yet
                Development
                No branches or pull requests
                Issue actions
                
, '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); }
})();
})();

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                .NET: Python: declarative workflow DevUI sample broken — wrong expression namespaces and JoinExecutor single-Message gap #7285
                Open
                Bug
                #7839
                Open
                .NET: Python: declarative workflow DevUI sample broken — wrong expression namespaces and JoinExecutor single-Message gap#7285
                Bug
                #7839
                Labels
                .NETUsage: [Issues, PRs], Target: .NetdevuiUsage: [Issues, PRs], Target: DevUIpythonUsage: [Issues, PRs], Target: PythonreproducedUsage: [Issues], Target: all issues that can be reproduced by the triage workflow
                Description
                @amit12cool
                Amit Dhawan (amit12cool)
                opened on Jul 23, 2026
                Bug Report
                Summary
                The workflow_declarative DevUI sample under python/samples/02-agents/devui/workflow_declarative/ always returns "child" regardless of the age entered via the DevUI chat interface.
                Root Causes
                1. workflow.yaml uses =inputs.age — this only works with structured dict input (e.g. {"age": 25}). The DevUI sends chat text, which populates System.LastMessage.Text, not Inputs.age. So =inputs.age is always Blank (treated as 0), causing 0 < 13 → True → "child" for all input.
                2. workflow.yaml uses the turn.* namespace — a .NET/Bot Framework convention. The Python runtime uses Local.* for per-turn variables.
                3. workflow.yaml references workflow.outputs.category (lowercase w) — the Python state engine is case-sensitive; the correct namespace is Workflow.Outputs.*.
                4. JoinExecutor does not handle a single Message trigger — when a Message (not list[Message]) is passed as the trigger, _ensure_state_initialized cannot extract user text into System.LastMessage.Text, compounding issue 1.
                Steps to Reproduce
                1. Start the DevUI sample: python workflow.py
                2. Open the DevUI chat
                3. Enter any age (e.g. 25)
                4. Observe the agent always responds with "child"
                Expected Behavior
                The agent correctly categorizes the user based on age (child / teen / adult).
                Environment
                • Python Agent Framework
                • python/samples/02-agents/devui/workflow_declarative/
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                  .NETUsage: [Issues, PRs], Target: .NetdevuiUsage: [Issues, PRs], Target: DevUIpythonUsage: [Issues, PRs], Target: PythonreproducedUsage: [Issues], Target: all issues that can be reproduced by the triage workflow
                  Type
                  Bug
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