Launch snapshot-isolated child agents from hosted Qwen Code parents
Qwen Code v0.25.3 lets hosted parents spawn snapshot-isolated children that read a frozen workspace without mutating files. Pair that with pinned Skills/MCP/Hooks on AgentDefinitions, Plan mode, and Shell Full Access switching so exploration stays isolated while sessions keep history.Why this loop
Qwen Code v0.25.3 (#14265) lets hosted parent agents launch snapshot-isolated child agents that read a frozen workspace copy without changing files, running commands, or affecting the parent—use that for parallel investigation instead of mutating the parent session. Managed sessions from published AgentDefinitions can load static Skills and pass pinned MCP server and Hook catalog selections to Hosted Runtimes (#14319), and the composer now connects to those pinned Skills (#14602). Enable Plan mode with inline attachments (#14531) and put sessions on the Web Shell approval mode allowlist (#14345) before switching Workspace-bound qwen-code Sessions among default, auto-edit, yolo, and Shell Full Access; that switch keeps history, Workspace, and drafts (#14323). Closing a parent now stops each child's running Turn (#14218). Eligible legacy cancellations require confirmation through the daemon or WebShell Continue flow, while explicitly user-cancelled work stays blocked (#14087). Do not assume anything from the 18 omitted changelog entries.
Proposed actions
- Upgrade to Qwen Code v0.25.3, then from a hosted parent agent launch a snapshot-isolated child agent against the frozen workspace copy; instruct it to inspect only and never change files, run commands, or write back to the parent.
- Publish an AgentDefinition that loads static Skills and pins the MCP server and Hook catalog selections so new managed sessions pass those pins to Hosted Runtimes.
- In the Web Shell composer, turn on Plan mode, attach files inline, and send the next turn using the pinned Skills already connected to the composer.
- Add this Workspace-bound qwen-code Session to the Web Shell approval mode allowlist, then switch it in place among default, auto-edit, yolo, and Shell Full Access so history, Workspace, and drafts are not dropped.
- Close the parent session when the investigation is done so each child session's running Turn stops; confirm any eligible legacy cancellation through the daemon or WebShell Continue flow, and leave explicitly user-cancelled work blocked.
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Context
Assistant: Qwen Code Proposal: Launch snapshot-isolated child agents from hosted Qwen Code parents Summary: Qwen Code v0.25.3 lets hosted parents spawn snapshot-isolated children that read a frozen workspace without mutating files. Pair that with pinned Skills/MCP/Hooks on AgentDefinitions, Plan mode, and Shell Full Access switching so exploration stays isolated while sessions keep history. Primary source: https://github.com/QwenLM/qwen-code/releases/tag/v0.25.3
Why it matters
Qwen Code v0.25.3 (#14265) lets hosted parent agents launch snapshot-isolated child agents that read a frozen workspace copy without changing files, running commands, or affecting the parent—use that for parallel investigation instead of mutating the parent session. Managed sessions from published AgentDefinitions can load static Skills and pass pinned MCP server and Hook catalog selections to Hosted Runtimes (#14319), and the composer now connects to those pinned Skills (#14602). Enable Plan mode with inline attachments (#14531) and put sessions on the Web Shell approval mode allowlist (#14345) before switching Workspace-bound qwen-code Sessions among default, auto-edit, yolo, and Shell Full Access; that switch keeps history, Workspace, and drafts (#14323). Closing a parent now stops each child's running Turn (#14218). Eligible legacy cancellations require confirmation through the daemon or WebShell Continue flow, while explicitly user-cancelled work stays blocked (#14087). Do not assume anything from the 18 omitted changelog entries.
Suggested actions
- Upgrade to Qwen Code v0.25.3, then from a hosted parent agent launch a snapshot-isolated child agent against the frozen workspace copy; instruct it to inspect only and never change files, run commands, or write back to the parent.
- Publish an AgentDefinition that loads static Skills and pins the MCP server and Hook catalog selections so new managed sessions pass those pins to Hosted Runtimes.
- In the Web Shell composer, turn on Plan mode, attach files inline, and send the next turn using the pinned Skills already connected to the composer.
- Add this Workspace-bound qwen-code Session to the Web Shell approval mode allowlist, then switch it in place among default, auto-edit, yolo, and Shell Full Access so history, Workspace, and drafts are not dropped.
- Close the parent session when the investigation is done so each child session's running Turn stops; confirm any eligible legacy cancellation through the daemon or WebShell Continue flow, and leave explicitly user-cancelled work blocked.
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