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OpenAI Agents and LangGraph HTTP templates have no system prompt #810

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OpenAI Agents and LangGraph HTTP templates have no system prompt#810
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@aidandaly24
aidandaly24
opened on Apr 10, 2026

Description

The OpenAI Agents and LangGraph HTTP agent templates ship with no system prompt. The agent has zero baseline instructions — it doesn't know it's supposed to be helpful, use tools, or behave in any particular way.

The Strands and Google ADK templates both include a system prompt ("You are a helpful assistant. Use tools when appropriate."), but OpenAI Agents and LangGraph were missed.

Steps to Reproduce

  1. agentcore create --name test --defaults --framework OpenAIAgents (or LangChain_LangGraph)
  2. Inspect app/test/main.py
  3. Observe there is no instructions= on the OpenAI Agent() constructor, or no prompt= on create_react_agent()

Expected Behavior

All templates should include a baseline system prompt consistent with the other frameworks, so agents have a default personality and know to use available tools.

Actual Behavior

  • OpenAI Agents: Agent() constructor has no instructions= parameter — the agent runs with no system prompt.
  • LangGraph: create_react_agent() has no prompt= parameter — same issue.

Additional Context

This is inconsistent with the Strands and Google ADK templates which both include:

"You are a helpful assistant. Use tools when appropriate."

Without a system prompt, the agent's behavior is unpredictable and it may not reliably use the tools registered to it.

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btn.textContent = 'Copied!';
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(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
OpenAI Agents and LangGraph HTTP templates have no system prompt · Issue #810 · aws/agentcore-cli · GitHub
      Skip to content
      OpenAI Agents and LangGraph HTTP templates have no system prompt #810
      Closed
      Closed
      OpenAI Agents and LangGraph HTTP templates have no system prompt#810
      Labels
      bugSomething isn't working
      Description
      @aidandaly24
      aidandaly24
      opened on Apr 10, 2026
      Description
      The OpenAI Agents and LangGraph HTTP agent templates ship with no system prompt. The agent has zero baseline instructions — it doesn't know it's supposed to be helpful, use tools, or behave in any particular way.
      The Strands and Google ADK templates both include a system prompt ("You are a helpful assistant. Use tools when appropriate."), but OpenAI Agents and LangGraph were missed.
      Steps to Reproduce
      1. agentcore create --name test --defaults --framework OpenAIAgents (or LangChain_LangGraph)
      2. Inspect app/test/main.py
      3. Observe there is no instructions= on the OpenAI Agent() constructor, or no prompt= on create_react_agent()
      Expected Behavior
      All templates should include a baseline system prompt consistent with the other frameworks, so agents have a default personality and know to use available tools.
      Actual Behavior
      • OpenAI Agents: Agent() constructor has no instructions= parameter — the agent runs with no system prompt.
      • LangGraph: create_react_agent() has no prompt= parameter — same issue.
      Additional Context
      This is inconsistent with the Strands and Google ADK templates which both include:
      "You are a helpful assistant. Use tools when appropriate."

      Without a system prompt, the agent's behavior is unpredictable and it may not reliably use the tools registered to it.
      Metadata
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      Assignees
      No one assigned
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        bugSomething isn't working
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          None yet
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          No branches or pull requests
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, 'i');
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style.textContent = '
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color-scheme: dark light;
}
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.markdown-body img { background: #0d1117; }
.markdown-body blockquote { border-left-color: #8b949e; }
.markdown-body hr { border-color: #30363d; }
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document.head.appendChild(style);
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} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
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(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
OpenAI Agents and LangGraph HTTP templates have no system prompt · Issue #810 · aws/agentcore-cli · GitHub
          Skip to content
          OpenAI Agents and LangGraph HTTP templates have no system prompt #810
          Closed
          Closed
          OpenAI Agents and LangGraph HTTP templates have no system prompt#810
          Labels
          bugSomething isn't working
          Description
          @aidandaly24
          aidandaly24
          opened on Apr 10, 2026
          Description
          The OpenAI Agents and LangGraph HTTP agent templates ship with no system prompt. The agent has zero baseline instructions — it doesn't know it's supposed to be helpful, use tools, or behave in any particular way.
          The Strands and Google ADK templates both include a system prompt ("You are a helpful assistant. Use tools when appropriate."), but OpenAI Agents and LangGraph were missed.
          Steps to Reproduce
          1. agentcore create --name test --defaults --framework OpenAIAgents (or LangChain_LangGraph)
          2. Inspect app/test/main.py
          3. Observe there is no instructions= on the OpenAI Agent() constructor, or no prompt= on create_react_agent()
          Expected Behavior
          All templates should include a baseline system prompt consistent with the other frameworks, so agents have a default personality and know to use available tools.
          Actual Behavior
          • OpenAI Agents: Agent() constructor has no instructions= parameter — the agent runs with no system prompt.
          • LangGraph: create_react_agent() has no prompt= parameter — same issue.
          Additional Context
          This is inconsistent with the Strands and Google ADK templates which both include:
          "You are a helpful assistant. Use tools when appropriate."

          Without a system prompt, the agent's behavior is unpredictable and it may not reliably use the tools registered to it.
          Metadata
          Metadata
          Assignees
          No one assigned
            Labels
            bugSomething isn't working
            Type
            No type
            Projects
            No projects
              Milestone
              No milestone
              Relationships
              None yet
              Development
              No branches or pull requests
              Issue actions
              
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
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var ref = document.referrer;
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style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
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mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
OpenAI Agents and LangGraph HTTP templates have no system prompt · Issue #810 · aws/agentcore-cli · GitHub
              Skip to content
              OpenAI Agents and LangGraph HTTP templates have no system prompt #810
              Closed
              Closed
              OpenAI Agents and LangGraph HTTP templates have no system prompt#810
              Labels
              bugSomething isn't working
              Description
              @aidandaly24
              aidandaly24
              opened on Apr 10, 2026
              Description
              The OpenAI Agents and LangGraph HTTP agent templates ship with no system prompt. The agent has zero baseline instructions — it doesn't know it's supposed to be helpful, use tools, or behave in any particular way.
              The Strands and Google ADK templates both include a system prompt ("You are a helpful assistant. Use tools when appropriate."), but OpenAI Agents and LangGraph were missed.
              Steps to Reproduce
              1. agentcore create --name test --defaults --framework OpenAIAgents (or LangChain_LangGraph)
              2. Inspect app/test/main.py
              3. Observe there is no instructions= on the OpenAI Agent() constructor, or no prompt= on create_react_agent()
              Expected Behavior
              All templates should include a baseline system prompt consistent with the other frameworks, so agents have a default personality and know to use available tools.
              Actual Behavior
              • OpenAI Agents: Agent() constructor has no instructions= parameter — the agent runs with no system prompt.
              • LangGraph: create_react_agent() has no prompt= parameter — same issue.
              Additional Context
              This is inconsistent with the Strands and Google ADK templates which both include:
              "You are a helpful assistant. Use tools when appropriate."

              Without a system prompt, the agent's behavior is unpredictable and it may not reliably use the tools registered to it.
              Metadata
              Metadata
              Assignees
              No one assigned
                Labels
                bugSomething isn't working
                Type
                No type
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                No projects
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                  No milestone
                  Relationships
                  None yet
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                  No branches or pull requests
                  Issue actions
                  
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
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document.querySelectorAll('a[href]').forEach(function(a) {
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mutations.forEach(function(m) {
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if (node.tagName === 'A') cleanLinks();
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var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
OpenAI Agents and LangGraph HTTP templates have no system prompt · Issue #810 · aws/agentcore-cli · GitHub
                  Skip to content
                  OpenAI Agents and LangGraph HTTP templates have no system prompt #810
                  Closed
                  Closed
                  OpenAI Agents and LangGraph HTTP templates have no system prompt#810
                  Labels
                  bugSomething isn't working
                  Description
                  @aidandaly24
                  aidandaly24
                  opened on Apr 10, 2026
                  Description
                  The OpenAI Agents and LangGraph HTTP agent templates ship with no system prompt. The agent has zero baseline instructions — it doesn't know it's supposed to be helpful, use tools, or behave in any particular way.
                  The Strands and Google ADK templates both include a system prompt ("You are a helpful assistant. Use tools when appropriate."), but OpenAI Agents and LangGraph were missed.
                  Steps to Reproduce
                  1. agentcore create --name test --defaults --framework OpenAIAgents (or LangChain_LangGraph)
                  2. Inspect app/test/main.py
                  3. Observe there is no instructions= on the OpenAI Agent() constructor, or no prompt= on create_react_agent()
                  Expected Behavior
                  All templates should include a baseline system prompt consistent with the other frameworks, so agents have a default personality and know to use available tools.
                  Actual Behavior
                  • OpenAI Agents: Agent() constructor has no instructions= parameter — the agent runs with no system prompt.
                  • LangGraph: create_react_agent() has no prompt= parameter — same issue.
                  Additional Context
                  This is inconsistent with the Strands and Google ADK templates which both include:
                  "You are a helpful assistant. Use tools when appropriate."

                  Without a system prompt, the agent's behavior is unpredictable and it may not reliably use the tools registered to it.
                  Metadata
                  Metadata
                  Assignees
                  No one assigned
                    Labels
                    bugSomething isn't working
                    Type
                    No type
                    Projects
                    No projects
                      Milestone
                      No milestone
                      Relationships
                      None yet
                      Development
                      No branches or pull requests
                      Issue actions
                      
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
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if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
OpenAI Agents and LangGraph HTTP templates have no system prompt · Issue #810 · aws/agentcore-cli · GitHub
                      Skip to content
                      OpenAI Agents and LangGraph HTTP templates have no system prompt #810
                      Closed
                      Closed
                      OpenAI Agents and LangGraph HTTP templates have no system prompt#810
                      Labels
                      bugSomething isn't working
                      Description
                      @aidandaly24
                      aidandaly24
                      opened on Apr 10, 2026
                      Description
                      The OpenAI Agents and LangGraph HTTP agent templates ship with no system prompt. The agent has zero baseline instructions — it doesn't know it's supposed to be helpful, use tools, or behave in any particular way.
                      The Strands and Google ADK templates both include a system prompt ("You are a helpful assistant. Use tools when appropriate."), but OpenAI Agents and LangGraph were missed.
                      Steps to Reproduce
                      1. agentcore create --name test --defaults --framework OpenAIAgents (or LangChain_LangGraph)
                      2. Inspect app/test/main.py
                      3. Observe there is no instructions= on the OpenAI Agent() constructor, or no prompt= on create_react_agent()
                      Expected Behavior
                      All templates should include a baseline system prompt consistent with the other frameworks, so agents have a default personality and know to use available tools.
                      Actual Behavior
                      • OpenAI Agents: Agent() constructor has no instructions= parameter — the agent runs with no system prompt.
                      • LangGraph: create_react_agent() has no prompt= parameter — same issue.
                      Additional Context
                      This is inconsistent with the Strands and Google ADK templates which both include:
                      "You are a helpful assistant. Use tools when appropriate."

                      Without a system prompt, the agent's behavior is unpredictable and it may not reliably use the tools registered to it.
                      Metadata
                      Metadata
                      Assignees
                      No one assigned
                        Labels
                        bugSomething isn't working
                        Type
                        No type
                        Projects
                        No projects
                          Milestone
                          No milestone
                          Relationships
                          None yet
                          Development
                          No branches or pull requests
                          Issue actions
                          
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
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}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
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} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
OpenAI Agents and LangGraph HTTP templates have no system prompt · Issue #810 · aws/agentcore-cli · GitHub
                          Skip to content
                          OpenAI Agents and LangGraph HTTP templates have no system prompt #810
                          Closed
                          Closed
                          OpenAI Agents and LangGraph HTTP templates have no system prompt#810
                          Labels
                          bugSomething isn't working
                          Description
                          @aidandaly24
                          aidandaly24
                          opened on Apr 10, 2026
                          Description
                          The OpenAI Agents and LangGraph HTTP agent templates ship with no system prompt. The agent has zero baseline instructions — it doesn't know it's supposed to be helpful, use tools, or behave in any particular way.
                          The Strands and Google ADK templates both include a system prompt ("You are a helpful assistant. Use tools when appropriate."), but OpenAI Agents and LangGraph were missed.
                          Steps to Reproduce
                          1. agentcore create --name test --defaults --framework OpenAIAgents (or LangChain_LangGraph)
                          2. Inspect app/test/main.py
                          3. Observe there is no instructions= on the OpenAI Agent() constructor, or no prompt= on create_react_agent()
                          Expected Behavior
                          All templates should include a baseline system prompt consistent with the other frameworks, so agents have a default personality and know to use available tools.
                          Actual Behavior
                          • OpenAI Agents: Agent() constructor has no instructions= parameter — the agent runs with no system prompt.
                          • LangGraph: create_react_agent() has no prompt= parameter — same issue.
                          Additional Context
                          This is inconsistent with the Strands and Google ADK templates which both include:
                          "You are a helpful assistant. Use tools when appropriate."

                          Without a system prompt, the agent's behavior is unpredictable and it may not reliably use the tools registered to it.
                          Metadata
                          Metadata
                          Assignees
                          No one assigned
                            Labels
                            bugSomething isn't working
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                            No type
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                            No projects
                              Milestone
                              No milestone
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                              None yet
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                              No branches or pull requests
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
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filter: invert(1) hue-rotate(180deg) !important;
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[data-theme="light"], [data-theme="light"],
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.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
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pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
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::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();
OpenAI Agents and LangGraph HTTP templates have no system prompt · Issue #810 · aws/agentcore-cli · GitHub
                              Skip to content
                              OpenAI Agents and LangGraph HTTP templates have no system prompt #810
                              Closed
                              Closed
                              OpenAI Agents and LangGraph HTTP templates have no system prompt#810
                              Labels
                              bugSomething isn't working
                              Description
                              @aidandaly24
                              aidandaly24
                              opened on Apr 10, 2026
                              Description
                              The OpenAI Agents and LangGraph HTTP agent templates ship with no system prompt. The agent has zero baseline instructions — it doesn't know it's supposed to be helpful, use tools, or behave in any particular way.
                              The Strands and Google ADK templates both include a system prompt ("You are a helpful assistant. Use tools when appropriate."), but OpenAI Agents and LangGraph were missed.
                              Steps to Reproduce
                              1. agentcore create --name test --defaults --framework OpenAIAgents (or LangChain_LangGraph)
                              2. Inspect app/test/main.py
                              3. Observe there is no instructions= on the OpenAI Agent() constructor, or no prompt= on create_react_agent()
                              Expected Behavior
                              All templates should include a baseline system prompt consistent with the other frameworks, so agents have a default personality and know to use available tools.
                              Actual Behavior
                              • OpenAI Agents: Agent() constructor has no instructions= parameter — the agent runs with no system prompt.
                              • LangGraph: create_react_agent() has no prompt= parameter — same issue.
                              Additional Context
                              This is inconsistent with the Strands and Google ADK templates which both include:
                              "You are a helpful assistant. Use tools when appropriate."

                              Without a system prompt, the agent's behavior is unpredictable and it may not reliably use the tools registered to it.
                              Metadata
                              Metadata
                              Assignees
                              No one assigned
                                Labels
                                bugSomething isn't working
                                Type
                                No type
                                Projects
                                No projects
                                  Milestone
                                  No milestone
                                  Relationships
                                  None yet
                                  Development
                                  No branches or pull requests
                                  Issue actions