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agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name #843

Closed
#1015
#844
Closed
agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name#843
#1015
#844
Labels
bugSomething isn't working

Description

@crouchcd
crouchcd
opened on Apr 14, 2026

Description

The packaging helpers (copySourceTree, createZipFromDir, and their sync counterparts) unconditionally excluded any directory named agentcore from the zip artifact. This caused a false exclusion when a third-party Python dependency — such as langgraph-checkpoint-aws — ships a package with a sub-module also named agentcore (e.g., langgraph_checkpoint_aws/agentcore/). Those nested packages were silently dropped from the deployment artifact, causing ImportError at runtime.

Steps to Reproduce

  1. Create an AgentCore project that uses langgraph-checkpoint-aws (or any package that contains a sub-directory named agentcore).
  2. Run agentcore deploy (CodeZip build type) or agentcore package.
  3. Inspect the generated .zip artifact.

Expected Behavior

Only the top-level agentcore/ directory (the CLI's own config/infrastructure directory) is excluded from the artifact. Any agentcore sub-directory that lives inside a dependency (e.g., langgraph_checkpoint_aws/agentcore/) is included normally.

Actual Behavior

All directories named agentcore at any depth in the source tree were excluded. The agentcore entry was in a flat EXCLUDED_ENTRIES set that was checked by name alone, without regard to its path relative to the project root. As a result, langgraph_checkpoint_aws/agentcore/init.py (and any sibling files) were silently omitted from the zip, breaking agents that depend on those packages at runtime.

CLI Version

0.8.0

Operating System

macOS

Additional Context

Root cause: 'agentcore' was a member of EXCLUDED_ENTRIES (src/lib/packaging/helpers.ts:55), which was applied to every directory entry by name during recursive traversal — no path-depth check was performed.

Fix: Remove 'agentcore' from EXCLUDED_ENTRIES and instead pass the original rootDir through all recursive calls. Before descending into or copying any entry, an explicit check gates exclusion on both the entry name matching CONFIG_DIR and the full resolved path equalling join(rootDir, CONFIG_DIR). This means only the project-root-level agentcore/ is skipped; nested occurrences are unaffected.

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var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name · Issue #843 · aws/agentcore-cli · GitHub
      Skip to content
      agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name #843
      Closed
      #1015
      #844
      Closed
      agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name#843
      #1015
      #844
      Labels
      bugSomething isn't working
      Description
      @crouchcd
      crouchcd
      opened on Apr 14, 2026
      Description
      The packaging helpers (copySourceTree, createZipFromDir, and their sync counterparts) unconditionally excluded any directory named agentcore from the zip artifact. This caused a false exclusion when a third-party Python dependency — such as langgraph-checkpoint-aws — ships a package with a sub-module also named agentcore (e.g., langgraph_checkpoint_aws/agentcore/). Those nested packages were silently dropped from the deployment artifact, causing ImportError at runtime.
      Steps to Reproduce
      1. Create an AgentCore project that uses langgraph-checkpoint-aws (or any package that contains a sub-directory named agentcore).
      2. Run agentcore deploy (CodeZip build type) or agentcore package.
      3. Inspect the generated .zip artifact.
      Expected Behavior
      Only the top-level agentcore/ directory (the CLI's own config/infrastructure directory) is excluded from the artifact. Any agentcore sub-directory that lives inside a dependency (e.g., langgraph_checkpoint_aws/agentcore/) is included normally.
      Actual Behavior
      All directories named agentcore at any depth in the source tree were excluded. The agentcore entry was in a flat EXCLUDED_ENTRIES set that was checked by name alone, without regard to its path relative to the project root. As a result, langgraph_checkpoint_aws/agentcore/init.py (and any sibling files) were silently omitted from the zip, breaking agents that depend on those packages at runtime.
      CLI Version
      0.8.0
      Operating System
      macOS
      Additional Context
      Root cause: 'agentcore' was a member of EXCLUDED_ENTRIES (src/lib/packaging/helpers.ts:55), which was applied to every directory entry by name during recursive traversal — no path-depth check was performed.
      Fix: Remove 'agentcore' from EXCLUDED_ENTRIES and instead pass the original rootDir through all recursive calls. Before descending into or copying any entry, an explicit check gates exclusion on both the entry name matching CONFIG_DIR and the full resolved path equalling join(rootDir, CONFIG_DIR). This means only the project-root-level agentcore/ is skipped; nested occurrences are unaffected.
      Metadata
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        bugSomething isn't working
        Type
        No type
        Projects
        No projects
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          No milestone
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          None yet
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          No branches or pull requests
          Issue actions
          
, 'i');
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agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name · Issue #843 · aws/agentcore-cli · GitHub
          Skip to content
          agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name #843
          Closed
          #1015
          #844
          Closed
          agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name#843
          #1015
          #844
          Labels
          bugSomething isn't working
          Description
          @crouchcd
          crouchcd
          opened on Apr 14, 2026
          Description
          The packaging helpers (copySourceTree, createZipFromDir, and their sync counterparts) unconditionally excluded any directory named agentcore from the zip artifact. This caused a false exclusion when a third-party Python dependency — such as langgraph-checkpoint-aws — ships a package with a sub-module also named agentcore (e.g., langgraph_checkpoint_aws/agentcore/). Those nested packages were silently dropped from the deployment artifact, causing ImportError at runtime.
          Steps to Reproduce
          1. Create an AgentCore project that uses langgraph-checkpoint-aws (or any package that contains a sub-directory named agentcore).
          2. Run agentcore deploy (CodeZip build type) or agentcore package.
          3. Inspect the generated .zip artifact.
          Expected Behavior
          Only the top-level agentcore/ directory (the CLI's own config/infrastructure directory) is excluded from the artifact. Any agentcore sub-directory that lives inside a dependency (e.g., langgraph_checkpoint_aws/agentcore/) is included normally.
          Actual Behavior
          All directories named agentcore at any depth in the source tree were excluded. The agentcore entry was in a flat EXCLUDED_ENTRIES set that was checked by name alone, without regard to its path relative to the project root. As a result, langgraph_checkpoint_aws/agentcore/init.py (and any sibling files) were silently omitted from the zip, breaking agents that depend on those packages at runtime.
          CLI Version
          0.8.0
          Operating System
          macOS
          Additional Context
          Root cause: 'agentcore' was a member of EXCLUDED_ENTRIES (src/lib/packaging/helpers.ts:55), which was applied to every directory entry by name during recursive traversal — no path-depth check was performed.
          Fix: Remove 'agentcore' from EXCLUDED_ENTRIES and instead pass the original rootDir through all recursive calls. Before descending into or copying any entry, an explicit check gates exclusion on both the entry name matching CONFIG_DIR and the full resolved path equalling join(rootDir, CONFIG_DIR). This means only the project-root-level agentcore/ is skipped; nested occurrences are unaffected.
          Metadata
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          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');
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try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name · Issue #843 · aws/agentcore-cli · GitHub
              Skip to content
              agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name #843
              Closed
              #1015
              #844
              Closed
              agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name#843
              #1015
              #844
              Labels
              bugSomething isn't working
              Description
              @crouchcd
              crouchcd
              opened on Apr 14, 2026
              Description
              The packaging helpers (copySourceTree, createZipFromDir, and their sync counterparts) unconditionally excluded any directory named agentcore from the zip artifact. This caused a false exclusion when a third-party Python dependency — such as langgraph-checkpoint-aws — ships a package with a sub-module also named agentcore (e.g., langgraph_checkpoint_aws/agentcore/). Those nested packages were silently dropped from the deployment artifact, causing ImportError at runtime.
              Steps to Reproduce
              1. Create an AgentCore project that uses langgraph-checkpoint-aws (or any package that contains a sub-directory named agentcore).
              2. Run agentcore deploy (CodeZip build type) or agentcore package.
              3. Inspect the generated .zip artifact.
              Expected Behavior
              Only the top-level agentcore/ directory (the CLI's own config/infrastructure directory) is excluded from the artifact. Any agentcore sub-directory that lives inside a dependency (e.g., langgraph_checkpoint_aws/agentcore/) is included normally.
              Actual Behavior
              All directories named agentcore at any depth in the source tree were excluded. The agentcore entry was in a flat EXCLUDED_ENTRIES set that was checked by name alone, without regard to its path relative to the project root. As a result, langgraph_checkpoint_aws/agentcore/init.py (and any sibling files) were silently omitted from the zip, breaking agents that depend on those packages at runtime.
              CLI Version
              0.8.0
              Operating System
              macOS
              Additional Context
              Root cause: 'agentcore' was a member of EXCLUDED_ENTRIES (src/lib/packaging/helpers.ts:55), which was applied to every directory entry by name during recursive traversal — no path-depth check was performed.
              Fix: Remove 'agentcore' from EXCLUDED_ENTRIES and instead pass the original rootDir through all recursive calls. Before descending into or copying any entry, an explicit check gates exclusion on both the entry name matching CONFIG_DIR and the full resolved path equalling join(rootDir, CONFIG_DIR). This means only the project-root-level agentcore/ is skipped; nested occurrences are unaffected.
              Metadata
              Metadata
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              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)) {
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var __re = new RegExp('^' + "youtube\\.com" + '
agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name · Issue #843 · aws/agentcore-cli · GitHub
                  Skip to content
                  agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name #843
                  Closed
                  #1015
                  #844
                  Closed
                  agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name#843
                  #1015
                  #844
                  Labels
                  bugSomething isn't working
                  Description
                  @crouchcd
                  crouchcd
                  opened on Apr 14, 2026
                  Description
                  The packaging helpers (copySourceTree, createZipFromDir, and their sync counterparts) unconditionally excluded any directory named agentcore from the zip artifact. This caused a false exclusion when a third-party Python dependency — such as langgraph-checkpoint-aws — ships a package with a sub-module also named agentcore (e.g., langgraph_checkpoint_aws/agentcore/). Those nested packages were silently dropped from the deployment artifact, causing ImportError at runtime.
                  Steps to Reproduce
                  1. Create an AgentCore project that uses langgraph-checkpoint-aws (or any package that contains a sub-directory named agentcore).
                  2. Run agentcore deploy (CodeZip build type) or agentcore package.
                  3. Inspect the generated .zip artifact.
                  Expected Behavior
                  Only the top-level agentcore/ directory (the CLI's own config/infrastructure directory) is excluded from the artifact. Any agentcore sub-directory that lives inside a dependency (e.g., langgraph_checkpoint_aws/agentcore/) is included normally.
                  Actual Behavior
                  All directories named agentcore at any depth in the source tree were excluded. The agentcore entry was in a flat EXCLUDED_ENTRIES set that was checked by name alone, without regard to its path relative to the project root. As a result, langgraph_checkpoint_aws/agentcore/init.py (and any sibling files) were silently omitted from the zip, breaking agents that depend on those packages at runtime.
                  CLI Version
                  0.8.0
                  Operating System
                  macOS
                  Additional Context
                  Root cause: 'agentcore' was a member of EXCLUDED_ENTRIES (src/lib/packaging/helpers.ts:55), which was applied to every directory entry by name during recursive traversal — no path-depth check was performed.
                  Fix: Remove 'agentcore' from EXCLUDED_ENTRIES and instead pass the original rootDir through all recursive calls. Before descending into or copying any entry, an explicit check gates exclusion on both the entry name matching CONFIG_DIR and the full resolved path equalling join(rootDir, CONFIG_DIR). This means only the project-root-level agentcore/ is skipped; nested occurrences are unaffected.
                  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')) {
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if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
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}, 1000);
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observer.observe(document.body, { childList: true, subtree: true });
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try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name · Issue #843 · aws/agentcore-cli · GitHub
                      Skip to content
                      agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name #843
                      Closed
                      #1015
                      #844
                      Closed
                      agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name#843
                      #1015
                      #844
                      Labels
                      bugSomething isn't working
                      Description
                      @crouchcd
                      crouchcd
                      opened on Apr 14, 2026
                      Description
                      The packaging helpers (copySourceTree, createZipFromDir, and their sync counterparts) unconditionally excluded any directory named agentcore from the zip artifact. This caused a false exclusion when a third-party Python dependency — such as langgraph-checkpoint-aws — ships a package with a sub-module also named agentcore (e.g., langgraph_checkpoint_aws/agentcore/). Those nested packages were silently dropped from the deployment artifact, causing ImportError at runtime.
                      Steps to Reproduce
                      1. Create an AgentCore project that uses langgraph-checkpoint-aws (or any package that contains a sub-directory named agentcore).
                      2. Run agentcore deploy (CodeZip build type) or agentcore package.
                      3. Inspect the generated .zip artifact.
                      Expected Behavior
                      Only the top-level agentcore/ directory (the CLI's own config/infrastructure directory) is excluded from the artifact. Any agentcore sub-directory that lives inside a dependency (e.g., langgraph_checkpoint_aws/agentcore/) is included normally.
                      Actual Behavior
                      All directories named agentcore at any depth in the source tree were excluded. The agentcore entry was in a flat EXCLUDED_ENTRIES set that was checked by name alone, without regard to its path relative to the project root. As a result, langgraph_checkpoint_aws/agentcore/init.py (and any sibling files) were silently omitted from the zip, breaking agents that depend on those packages at runtime.
                      CLI Version
                      0.8.0
                      Operating System
                      macOS
                      Additional Context
                      Root cause: 'agentcore' was a member of EXCLUDED_ENTRIES (src/lib/packaging/helpers.ts:55), which was applied to every directory entry by name during recursive traversal — no path-depth check was performed.
                      Fix: Remove 'agentcore' from EXCLUDED_ENTRIES and instead pass the original rootDir through all recursive calls. Before descending into or copying any entry, an explicit check gates exclusion on both the entry name matching CONFIG_DIR and the full resolved path equalling join(rootDir, CONFIG_DIR). This means only the project-root-level agentcore/ is skipped; nested occurrences are unaffected.
                      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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(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name · Issue #843 · aws/agentcore-cli · GitHub
                          Skip to content
                          agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name #843
                          Closed
                          #1015
                          #844
                          Closed
                          agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name#843
                          #1015
                          #844
                          Labels
                          bugSomething isn't working
                          Description
                          @crouchcd
                          crouchcd
                          opened on Apr 14, 2026
                          Description
                          The packaging helpers (copySourceTree, createZipFromDir, and their sync counterparts) unconditionally excluded any directory named agentcore from the zip artifact. This caused a false exclusion when a third-party Python dependency — such as langgraph-checkpoint-aws — ships a package with a sub-module also named agentcore (e.g., langgraph_checkpoint_aws/agentcore/). Those nested packages were silently dropped from the deployment artifact, causing ImportError at runtime.
                          Steps to Reproduce
                          1. Create an AgentCore project that uses langgraph-checkpoint-aws (or any package that contains a sub-directory named agentcore).
                          2. Run agentcore deploy (CodeZip build type) or agentcore package.
                          3. Inspect the generated .zip artifact.
                          Expected Behavior
                          Only the top-level agentcore/ directory (the CLI's own config/infrastructure directory) is excluded from the artifact. Any agentcore sub-directory that lives inside a dependency (e.g., langgraph_checkpoint_aws/agentcore/) is included normally.
                          Actual Behavior
                          All directories named agentcore at any depth in the source tree were excluded. The agentcore entry was in a flat EXCLUDED_ENTRIES set that was checked by name alone, without regard to its path relative to the project root. As a result, langgraph_checkpoint_aws/agentcore/init.py (and any sibling files) were silently omitted from the zip, breaking agents that depend on those packages at runtime.
                          CLI Version
                          0.8.0
                          Operating System
                          macOS
                          Additional Context
                          Root cause: 'agentcore' was a member of EXCLUDED_ENTRIES (src/lib/packaging/helpers.ts:55), which was applied to every directory entry by name during recursive traversal — no path-depth check was performed.
                          Fix: Remove 'agentcore' from EXCLUDED_ENTRIES and instead pass the original rootDir through all recursive calls. Before descending into or copying any entry, an explicit check gates exclusion on both the entry name matching CONFIG_DIR and the full resolved path equalling join(rootDir, CONFIG_DIR). This means only the project-root-level agentcore/ is skipped; nested occurrences are unaffected.
                          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)) {
// Universal Dark Mode - works on any site
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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 */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
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;
}
/* Scrollbars */
::-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); }
})();
})();
agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name · Issue #843 · aws/agentcore-cli · GitHub
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                              agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name #843
                              Closed
                              #1015
                              #844
                              Closed
                              agentcore directory incorrectly excluded from CodeZip artifact when used as a Python package name#843
                              #1015
                              #844
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                              bugSomething isn't working
                              Description
                              @crouchcd
                              crouchcd
                              opened on Apr 14, 2026
                              Description
                              The packaging helpers (copySourceTree, createZipFromDir, and their sync counterparts) unconditionally excluded any directory named agentcore from the zip artifact. This caused a false exclusion when a third-party Python dependency — such as langgraph-checkpoint-aws — ships a package with a sub-module also named agentcore (e.g., langgraph_checkpoint_aws/agentcore/). Those nested packages were silently dropped from the deployment artifact, causing ImportError at runtime.
                              Steps to Reproduce
                              1. Create an AgentCore project that uses langgraph-checkpoint-aws (or any package that contains a sub-directory named agentcore).
                              2. Run agentcore deploy (CodeZip build type) or agentcore package.
                              3. Inspect the generated .zip artifact.
                              Expected Behavior
                              Only the top-level agentcore/ directory (the CLI's own config/infrastructure directory) is excluded from the artifact. Any agentcore sub-directory that lives inside a dependency (e.g., langgraph_checkpoint_aws/agentcore/) is included normally.
                              Actual Behavior
                              All directories named agentcore at any depth in the source tree were excluded. The agentcore entry was in a flat EXCLUDED_ENTRIES set that was checked by name alone, without regard to its path relative to the project root. As a result, langgraph_checkpoint_aws/agentcore/init.py (and any sibling files) were silently omitted from the zip, breaking agents that depend on those packages at runtime.
                              CLI Version
                              0.8.0
                              Operating System
                              macOS
                              Additional Context
                              Root cause: 'agentcore' was a member of EXCLUDED_ENTRIES (src/lib/packaging/helpers.ts:55), which was applied to every directory entry by name during recursive traversal — no path-depth check was performed.
                              Fix: Remove 'agentcore' from EXCLUDED_ENTRIES and instead pass the original rootDir through all recursive calls. Before descending into or copying any entry, an explicit check gates exclusion on both the entry name matching CONFIG_DIR and the full resolved path equalling join(rootDir, CONFIG_DIR). This means only the project-root-level agentcore/ is skipped; nested occurrences are unaffected.
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