AgentParcel 3.5.1

AgentParcel 3.5.1 - release notes

macOS is community-tested/beta. Mac users: if you hit an issue or can help test, reach out via chriskalkowski.com.

Project site: https://agentparcel.net.

AgentParcel is an independent project. It is not affiliated with, endorsed by, or derived from any other project named ZipSplitter, and it does not use any of that project's code. ZipSplitter was only our internal working name; all AgentParcel code was written from scratch for this project. Before release we researched that working name, found another existing project already using it, and switched to AgentParcel for the public release. Leftover _zipsplitter_* marker files and ZIPSPLITTER_* environment-variable fallbacks come from our own development builds, not from that other project. They remain only for backward compatibility.

Package	Platform	Status
AgentParcel-3.5.1-windows.zip	Windows 10/11 (PowerShell 5.1, included in Windows)	Split and rebuild confirmed working on Windows, from the portable zip and the installer
AgentParcel-3.5.1-linux.zip	Linux with Python 3.9+ (Tk optional)	unit tests for the 3.5.1 PowerShell fixes, presets, regenerate, zlib, AES-GCM, rebuild.py, and cross-checks between PowerShell and Python
AgentParcel-3.5.1-macos.zip	macOS 11+ with Python 3.9+	community-tested/beta (same Python program as Linux). Mac users: if you hit an issue or can help test, reach out via chriskalkowski.com.

Check a download: sha256sum -c SHA256SUMS.txt (Linux), shasum -a 256 -c SHA256SUMS.txt (macOS),
Get-FileHash .\AgentParcel-3.5.1-windows.zip (Windows PowerShell).

What's new

• 3.5.1: Windows zip split works again. v3.4.0 and v3.5.0 failed with "Argument types do not match" and deleted the output. A List[object] must not be wrapped in @().
• 3.5.1: byte parts verify. The manifest was already correct. Rebuild no longer calls every part corrupt, and the log puts each part on its own line.
• 3.5.0: size presets. Window menu and MCP preset: chatgpt-dot (19,000,000 bytes under 20 MB), chat-512 (500,000,000 under 512 MB), discord (24,000,000 under the free 25 MB cap; Nitro is higher), email (24,000,000 under a common 25 MB cap), github-release (1,900,000,000 under 2 GB), custom. Caps sit under the advertised limit. Limits can change.
• 3.5.0: re-send missing parts. MCP regenerate_parts, and Resend in the window, rewrite only the missing or corrupt parts from the original file. Rebuild names any parts that are still needed.
• 3.5.0: optional zlib and AES-256-GCM. Off by default. rebuild.py decompresses zlib parts with the standard library. Encrypted parts need AgentParcel plus cryptography (pip install agentparcel[crypto]). The password is not stored. rebuild.py will not decrypt and will not write a file.
• 3.5.0: pip package. pip install agentparcel provides agentparcel and agentparcel-mcp. Not uploaded to PyPI in this release.
• macOS is community-tested/beta. Mac users: if you hit an issue or can help test, reach out via chriskalkowski.com.
• 3.4.0: split any file. Byte-level split of any file type into numbered parts under a size cap, rebuilt to the exact original (SHA-256). Window checkbox, and MCP tool split_any_file. rebuild accepts zip part sets and byte-split sets.
• 3.4.0: verify. Before rebuilding, check that every part is present and that each checksum matches the manifest. Missing and corrupt parts are named. Window button, and MCP tool verify.
• 3.4.0: rebuild without AgentParcel. Every split folder includes HOW-TO-REBUILD.txt and a dependency-free rebuild.py (Python 3 standard library only). The text file includes a PowerShell equivalent for a byte split. rebuild.py reassembles a byte-split file and checks it. For zip parts it verifies part-file checksums; AgentParcel still reassembles the zip.
• 3.4.0: Stop. The window stays responsive during split and rebuild. Stop cancels the job, deletes partial output from that run, and reports Cancelled. The MCP server honors client cancellation and does not leave a half-written output.
• 3.3.x parts and manifests still work. _zipsplitter_* marker files and ZIPSPLITTER_* fallbacks are unchanged.
• 3.3.1: the public name is AgentParcel. ZipSplitter was only our internal working name. AgentParcel is not affiliated with, endorsed by, or derived from any other project named ZipSplitter, and it does not use any of that project's code. All AgentParcel code was written from scratch for this project. New file names: AgentParcel.ps1/.bat, agentparcel.py,
  agentparcel_mcp.py, AgentParcel.command, agentparcel.sh, agentparcel.desktop, Install-Python-for-AgentParcel.bat,
  AgentParcel-apps.zip. MCP server name agentparcel, env var AGENTPARCEL_MCP_ROOTS (ZIPSPLITTER_MCP_ROOTS is still accepted, only as a compatibility fallback from our own development builds).
• Parts from our own development builds still rebuild, and those builds still rebuild AgentParcel parts. AgentParcel ignores ZipSplitter-apps.zip; those older builds ignore AgentParcel-apps.zip. The on-disk _zipsplitter_* marker file names are unchanged on purpose, for backward compatibility with those builds only. They do not come from any other project named ZipSplitter.
• 3.3.1: AgentParcel-apps.zip (the bundle sent with the parts) now includes LICENSE.txt.
• One package per platform, each with an mcp/ folder (an MCP server for AI agents, with config
  snippets for Claude Desktop, Claude Code, Cursor and Codex CLI that fit that platform).
• Python helpers: Install-Python-for-AgentParcel.bat (Windows, Python 3.15, per user, no admin),
  install-deps.sh (Linux), install-python-macos.sh (macOS, untested).
• Python 3.15 (3.15.1, released 2026-10-21) is the recommended Python. 3.9+ still works.
• The part format has not changed. Parts made with 3.x on any platform rebuild on any other.

Known limits / open items

• Our development builds that still used the ZipSplitter working name only recognise AgentParcel-apps.zip by its marker file. If someone picks the bundle
  plus only some parts by hand in one of those older builds, it can wrongly report missing parts. Choosing the folder,
  any single part, or all parts works. AgentParcel itself recognises both bundle names.
• macOS package: community-tested/beta. Mac users: if you hit an issue or can help test, reach out via chriskalkowski.com.
• The Windows Python installer helper was syntax-checked but not run on a real PC.
• winget has no Python.Python.3.15 package yet (its submission is still open as of
  2026-10-25), so the helper falls back to the python.org installer.

License

AgentParcel License 1.0 (see LICENSE.txt). This is source-available, not OSI-approved open source,
because of its Equal Tier Availability condition. In plain English:

• You may use, copy, modify, share and sell it, including commercially. Keep the license and copyright notice.
• You may market it as an included feature.
• If a product with several plans or tiers includes it, every tier that can use that kind of tool must get it on
  equal terms, free tier included. For the MCP server that means every tier with MCP/tool access; for the apps, every
  tier that can run local apps or scripts. It can't be reserved for a higher or paid tier, and its usage limits can't
  be stricter than those for comparable tools in that tier. A tier with no such access at all doesn't have to get it.
• No warranty.
• Licensing questions and permissions: https://chriskalkowski.com
• Project site: https://agentparcel.net

Full history: CHANGELOG.md inside each package.

AgentParcel 3.5.0

Fixed in v3.5.1: the Windows app in v3.4.0 and v3.5.0 fails when splitting zips ("Argument types do not match") and may wrongly report byte-split parts as corrupt on rebuild. Use v3.5.1 (https://github.com/MASTER246C/agentparcel/releases/tag/v3.5.1).

AgentParcel 3.5.0 - release notes

macOS is community-tested/beta. Mac users: if you hit an issue or can help test, reach out via chriskalkowski.com.

Project site: https://agentparcel.net.

AgentParcel is an independent project. It is not affiliated with, endorsed by, or derived from any other project named ZipSplitter, and it does not use any of that project's code. ZipSplitter was only our internal working name; all AgentParcel code was written from scratch for this project. Before release we researched that working name, found another existing project already using it, and switched to AgentParcel for the public release. Leftover _zipsplitter_* marker files and ZIPSPLITTER_* environment-variable fallbacks come from our own development builds, not from that other project. They remain only for backward compatibility.

Package	Platform	Status
AgentParcel-3.5.0-windows.zip	Windows 10/11 (PowerShell 5.1, included in Windows)	PowerShell source is in the package. The 3.5.0 PowerShell changes (size presets and Resend) were not executed on Windows in this build
AgentParcel-3.5.0-linux.zip	Linux with Python 3.9+ (Tk optional)	unit tests for presets, regenerate, zlib, AES-GCM, rebuild.py, and the wheel install; MCP tools checked
AgentParcel-3.5.0-macos.zip	macOS 11+ with Python 3.9+	community-tested/beta (same Python program as Linux). Mac users: if you hit an issue or can help test, reach out via chriskalkowski.com.

Check a download: sha256sum -c SHA256SUMS.txt (Linux), shasum -a 256 -c SHA256SUMS.txt (macOS),
Get-FileHash .\AgentParcel-3.5.0-windows.zip (Windows PowerShell).

What's new

• 3.5.0: size presets. Window menu and MCP preset: chatgpt-dot (19,000,000 bytes under 20 MB), chat-512 (500,000,000 under 512 MB), discord (24,000,000 under the free 25 MB cap; Nitro is higher), email (24,000,000 under a common 25 MB cap), github-release (1,900,000,000 under 2 GB), custom. Caps sit under the advertised limit. Limits can change.
• 3.5.0: re-send missing parts. MCP regenerate_parts, and Resend in the window, rewrite only the missing or corrupt parts from the original file. Rebuild names any parts that are still needed.
• 3.5.0: optional zlib and AES-256-GCM. Off by default. rebuild.py decompresses zlib parts with the standard library. Encrypted parts need AgentParcel plus cryptography (pip install agentparcel[crypto]). The password is not stored. rebuild.py will not decrypt and will not write a file.
• 3.5.0: pip package. pip install agentparcel provides agentparcel and agentparcel-mcp. Not uploaded to PyPI in this release.
• macOS is community-tested/beta. Mac users: if you hit an issue or can help test, reach out via chriskalkowski.com.
• 3.4.0: split any file. Byte-level split of any file type into numbered parts under a size cap, rebuilt to the exact original (SHA-256). Window checkbox, and MCP tool split_any_file. rebuild accepts zip part sets and byte-split sets.
• 3.4.0: verify. Before rebuilding, check that every part is present and that each checksum matches the manifest. Missing and corrupt parts are named. Window button, and MCP tool verify.
• 3.4.0: rebuild without AgentParcel. Every split folder includes HOW-TO-REBUILD.txt and a dependency-free rebuild.py (Python 3 standard library only). The text file includes a PowerShell equivalent for a byte split. rebuild.py reassembles a byte-split file and checks it. For zip parts it verifies part-file checksums; AgentParcel still reassembles the zip.
• 3.4.0: Stop. The window stays responsive during split and rebuild. Stop cancels the job, deletes partial output from that run, and reports Cancelled. The MCP server honors client cancellation and does not leave a half-written output.
• 3.3.x parts and manifests still work. _zipsplitter_* marker files and ZIPSPLITTER_* fallbacks are unchanged.
• 3.3.1: the public name is AgentParcel. ZipSplitter was only our internal working name. AgentParcel is not affiliated with, endorsed by, or derived from any other project named ZipSplitter, and it does not use any of that project's code. All AgentParcel code was written from scratch for this project. New file names: AgentParcel.ps1/.bat, agentparcel.py,
  agentparcel_mcp.py, AgentParcel.command, agentparcel.sh, agentparcel.desktop, Install-Python-for-AgentParcel.bat,
  AgentParcel-apps.zip. MCP server name agentparcel, env var AGENTPARCEL_MCP_ROOTS (ZIPSPLITTER_MCP_ROOTS is still accepted, only as a compatibility fallback from our own development builds).
• Parts from our own development builds still rebuild, and those builds still rebuild AgentParcel parts. AgentParcel ignores ZipSplitter-apps.zip; those older builds ignore AgentParcel-apps.zip. The on-disk _zipsplitter_* marker file names are unchanged on purpose, for backward compatibility with those builds only. They do not come from any other project named ZipSplitter.
• 3.3.1: AgentParcel-apps.zip (the bundle sent with the parts) now includes LICENSE.txt.
• One package per platform, each with an mcp/ folder (an MCP server for AI agents, with config
  snippets for Claude Desktop, Claude Code, Cursor and Codex CLI that fit that platform).
• Python helpers: Install-Python-for-AgentParcel.bat (Windows, Python 3.15, per user, no admin),
  install-deps.sh (Linux), install-python-macos.sh (macOS, untested).
• Python 3.15 (3.15.1, released 2026-10-21) is the recommended Python. 3.9+ still works.
• The part format has not changed. Parts made with 3.x on any platform rebuild on any other.

Known limits / open items

• Our development builds that still used the ZipSplitter working name only recognise AgentParcel-apps.zip by its marker file. If someone picks the bundle
  plus only some parts by hand in one of those older builds, it can wrongly report missing parts. Choosing the folder,
  any single part, or all parts works. AgentParcel itself recognises both bundle names.
• macOS package: community-tested/beta. Mac users: if you hit an issue or can help test, reach out via chriskalkowski.com.
• The Windows Python installer helper was syntax-checked but not run on a real PC.
• winget has no Python.Python.3.15 package yet (its submission is still open as of
  2026-10-25), so the helper falls back to the python.org installer.

License

AgentParcel License 1.0 (see LICENSE.txt). This is source-available, not OSI-approved open source,
because of its Equal Tier Availability condition. In plain English:

• You may use, copy, modify, share and sell it, including commercially. Keep the license and copyright notice.
• You may market it as an included feature.
• If a product with several plans or tiers includes it, every tier that can use that kind of tool must get it on
  equal terms, free tier included. For the MCP server that means every tier with MCP/tool access; for the apps, every
  tier that can run local apps or scripts. It can't be reserved for a higher or paid tier, and its usage limits can't
  be stricter than those for comparable tools in that tier. A tier with no such access at all doesn't have to get it.
• No warranty.
• Licensing questions and permissions: https://chriskalkowski.com
• Project site: https://agentparcel.net

Full history: CHANGELOG.md inside each package.

AgentParcel 3.4.0

Fixed in v3.5.1: the Windows app in v3.4.0 and v3.5.0 fails when splitting zips ("Argument types do not match") and may wrongly report byte-split parts as corrupt on rebuild. Use v3.5.1 (https://github.com/MASTER246C/agentparcel/releases/tag/v3.5.1).

AgentParcel 3.4.0 - release notes

macOS package is untested on real Mac hardware (beta). It is the same Python program as the Linux package. Work through TESTING-CHECKLIST.md on a Mac before relying on it.

Project site: https://agentparcel.net.

AgentParcel is an independent project. It is not affiliated with, endorsed by, or derived from any other project named ZipSplitter, and it does not use any of that project's code. ZipSplitter was only our internal working name; all AgentParcel code was written from scratch for this project. Before release we researched that working name, found another existing project already using it, and switched to AgentParcel for the public release. Leftover _zipsplitter_* marker files and ZIPSPLITTER_* environment-variable fallbacks come from our own development builds, not from that other project. They remain only for backward compatibility.

Package	Platform	Status
AgentParcel-3.4.0-windows.zip	Windows 10/11 (PowerShell 5.1, included in Windows)	PowerShell source is in the package. The 3.4.0 PowerShell changes were not executed on Windows in this build
AgentParcel-3.4.0-linux.zip	Linux with Python 3.9+ (Tk optional)	unit tests for byte split, verify, rebuild.py, and cancel; MCP tools checked
AgentParcel-3.4.0-macos.zip	macOS 11+ with Python 3.9+	UNTESTED - needs testing on a real Mac (same Python program as Linux; not run on Mac hardware)

Check a download: sha256sum -c SHA256SUMS.txt (Linux), shasum -a 256 -c SHA256SUMS.txt (macOS),
Get-FileHash .\AgentParcel-3.4.0-windows.zip (Windows PowerShell).

What's new

• 3.4.0: split any file. Byte-level split of any file type into numbered parts under a size cap, rebuilt to the exact original (SHA-256). Window checkbox, and MCP tool split_any_file. rebuild accepts zip part sets and byte-split sets.
• 3.4.0: verify. Before rebuilding, check that every part is present and that each checksum matches the manifest. Missing and corrupt parts are named. Window button, and MCP tool verify.
• 3.4.0: rebuild without AgentParcel. Every split folder includes HOW-TO-REBUILD.txt and a dependency-free rebuild.py (Python 3 standard library only). The text file includes a PowerShell equivalent for a byte split. rebuild.py reassembles a byte-split file and checks it. For zip parts it verifies part-file checksums; AgentParcel still reassembles the zip.
• 3.4.0: Stop. The window stays responsive during split and rebuild. Stop cancels the job, deletes partial output from that run, and reports Cancelled. The MCP server honors client cancellation and does not leave a half-written output.
• 3.3.x parts and manifests still work. _zipsplitter_* marker files and ZIPSPLITTER_* fallbacks are unchanged.
• 3.3.1: the public name is AgentParcel. ZipSplitter was only our internal working name. AgentParcel is not affiliated with, endorsed by, or derived from any other project named ZipSplitter, and it does not use any of that project's code. All AgentParcel code was written from scratch for this project. New file names: AgentParcel.ps1/.bat, agentparcel.py,
  agentparcel_mcp.py, AgentParcel.command, agentparcel.sh, agentparcel.desktop, Install-Python-for-AgentParcel.bat,
  AgentParcel-apps.zip. MCP server name agentparcel, env var AGENTPARCEL_MCP_ROOTS (ZIPSPLITTER_MCP_ROOTS is still accepted, only as a compatibility fallback from our own development builds).
• Parts from our own development builds still rebuild, and those builds still rebuild AgentParcel parts. AgentParcel ignores ZipSplitter-apps.zip; those older builds ignore AgentParcel-apps.zip. The on-disk _zipsplitter_* marker file names are unchanged on purpose, for backward compatibility with those builds only. They do not come from any other project named ZipSplitter.
• 3.3.1: AgentParcel-apps.zip (the bundle sent with the parts) now includes LICENSE.txt.
• One package per platform, each with an mcp/ folder (an MCP server for AI agents, with config
  snippets for Claude Desktop, Claude Code, Cursor and Codex CLI that fit that platform).
• Python helpers: Install-Python-for-AgentParcel.bat (Windows, Python 3.15, per user, no admin),
  install-deps.sh (Linux), install-python-macos.sh (macOS, untested).
• Python 3.15 (3.15.1, released 2026-10-21) is the recommended Python. 3.9+ still works.
• The part format has not changed. Parts made with 3.x on any platform rebuild on any other.

Known limits / open items

• Our development builds that still used the ZipSplitter working name only recognise AgentParcel-apps.zip by its marker file. If someone picks the bundle
  plus only some parts by hand in one of those older builds, it can wrongly report missing parts. Choosing the folder,
  any single part, or all parts works. AgentParcel itself recognises both bundle names.
• macOS package: not yet run on a Mac (Gatekeeper prompts, the Tk look and the pkg install path are unverified).
• The Windows Python installer helper was syntax-checked but not run on a real PC.
• winget has no Python.Python.3.15 package yet (its submission is still open as of
  2026-10-25), so the helper falls back to the python.org installer.

License

AgentParcel License 1.0 (see LICENSE.txt). This is source-available, not OSI-approved open source,
because of its Equal Tier Availability condition. In plain English:

• You may use, copy, modify, share and sell it, including commercially. Keep the license and copyright notice.
• You may market it as an included feature.
• If a product with several plans or tiers includes it, every tier that can use that kind of tool must get it on
  equal terms, free tier included. For the MCP server that means every tier with MCP/tool access; for the apps, every
  tier that can run local apps or scripts. It can't be reserved for a higher or paid tier, and its usage limits can't
  be stricter than those for comparable tools in that tier. A tier with no such access at all doesn't have to get it.
• No warranty.
• Licensing questions and permissions: https://chriskalkowski.com
• Project site: https://agentparcel.net

Full history: CHANGELOG.md inside each package.

AgentParcel 3.3.1

AgentParcel 3.3.1 - release notes

Note: The macOS build (AgentParcel-3.3.1-macos.zip) has not been tested on real Mac hardware yet. It had static checks and a Python run on Linux only. Gatekeeper prompts, the Tk window, and install-python-macos.sh are still unverified.

Project site: https://agentparcel.net.

AgentParcel is an independent project. It is not affiliated with, endorsed by, or derived from any other project named ZipSplitter, and it does not use any of that project's code. ZipSplitter was only our internal working name; all AgentParcel code was written from scratch for this project. Before release we researched that working name, found another existing project already using it, and switched to AgentParcel for the public release. Leftover _zipsplitter_* marker files and ZIPSPLITTER_* environment-variable fallbacks come from our own development builds, not from that other project. They remain only for backward compatibility.

Package	Platform	Status
AgentParcel-3.3.1-windows.zip	Windows 10/11 (PowerShell 5.1, included in Windows)	tested on the build box (pwsh) and parse-checked on Windows PowerShell 5.1
AgentParcel-3.3.1-linux.zip	Linux with Python 3.9+ (Tk optional)	tested (CLI, GUI on a headless X server, MCP)
AgentParcel-3.3.1-macos.zip	macOS 11+ with Python 3.9+	UNTESTED - needs testing on a real Mac (static checks and a Python run on Linux only)

Check a download: sha256sum -c SHA256SUMS.txt (Linux), shasum -a 256 -c SHA256SUMS.txt (macOS),
Get-FileHash .\AgentParcel-3.3.1-windows.zip (Windows PowerShell).

What's new

• 3.3.1: the public name is AgentParcel. ZipSplitter was only our internal working name. AgentParcel is not affiliated with, endorsed by, or derived from any other project named ZipSplitter, and it does not use any of that project's code. All AgentParcel code was written from scratch for this project. New file names: AgentParcel.ps1/.bat, agentparcel.py,
  agentparcel_mcp.py, AgentParcel.command, agentparcel.sh, agentparcel.desktop, Install-Python-for-AgentParcel.bat,
  AgentParcel-apps.zip. MCP server name agentparcel, env var AGENTPARCEL_MCP_ROOTS (ZIPSPLITTER_MCP_ROOTS is still accepted, only as a compatibility fallback from our own development builds).
• Parts from our own development builds still rebuild, and those builds still rebuild AgentParcel parts. AgentParcel ignores ZipSplitter-apps.zip; those older builds ignore AgentParcel-apps.zip. The on-disk _zipsplitter_* marker file names are unchanged on purpose, for backward compatibility with those builds only. They do not come from any other project named ZipSplitter.
• 3.3.1: AgentParcel-apps.zip (the bundle sent with the parts) now includes LICENSE.txt.
• One package per platform, each with an mcp/ folder (an MCP server for AI agents, with config
  snippets for Claude Desktop, Claude Code, Cursor and Codex CLI that fit that platform).
• Python helpers: Install-Python-for-AgentParcel.bat (Windows, Python 3.15, per user, no admin),
  install-deps.sh (Linux), install-python-macos.sh (macOS, untested).
• Python 3.15 (3.15.1, released 2026-10-21) is the recommended Python. 3.9+ still works.
• The part format has not changed. Parts made with 3.x on any platform rebuild on any other.

Known limits / open items

• Our development builds that still used the ZipSplitter working name only recognise AgentParcel-apps.zip by its marker file. If someone picks the bundle
  plus only some parts by hand in one of those older builds, it can wrongly report missing parts. Choosing the folder,
  any single part, or all parts works. AgentParcel itself recognises both bundle names.
• macOS package: not yet run on a Mac (Gatekeeper prompts, the Tk look and the pkg install path are unverified).
• The Windows Python installer helper was syntax-checked but not run on a real PC.
• winget has no Python.Python.3.15 package yet (its submission is still open as of
  2026-10-25), so the helper falls back to the python.org installer.

License

AgentParcel License 1.0 (see LICENSE.txt). This is source-available, not OSI-approved open source,
because of its Equal Tier Availability condition. In plain English:

• You may use, copy, modify, share and sell it, including commercially. Keep the license and copyright notice.
• You may market it as an included feature.
• If a product with several plans or tiers includes it, every tier that can use that kind of tool must get it on
  equal terms, free tier included. For the MCP server that means every tier with MCP/tool access; for the apps, every
  tier that can run local apps or scripts. It can't be reserved for a higher or paid tier, and its usage limits can't
  be stricter than those for comparable tools in that tier. A tier with no such access at all doesn't have to get it.
• No warranty.
• Licensing questions and permissions: https://chriskalkowski.com
• Project site: https://agentparcel.net

Full history: CHANGELOG.md inside each package.