deepseek-harness/packages/shell

description, kind

description	kind
The bash capability family for deployments and maintainers choosing and composing a shell executor, sandboxing, and the model-facing bash and pwsh tools.	package-group

shell/ — bash capability family

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Summary

The shell group provides command execution to agents: run a foreground command and read its bounded output, or start a background process and poll it, on POSIX with Bash and on Windows with PowerShell. Exactly one executor implementation is mounted per composition; the sandboxing executors confine every command through the sandbox capability, and the model-facing bash and pwsh tools sit on top of whichever executor is mounted. Choose a Bash executor for POSIX, a PowerShell executor for Windows, and pick the sandboxing variant when commands need file-level confinement.

Table of Contents

• Packages
• Related documentation
• Dev Note

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Packages

Package	Role	ctx key
shell	Defines the executor contract: foreground runs, background handles, and request resolution	ctx.shell
bash-local	Runs Bash commands as fresh bash -c processes on POSIX	registers ctx.shell
bash-sandbox	Runs Bash commands confined through the sandbox capability, reporting denials as facts	registers ctx.shell
pwsh-local	Runs PowerShell commands as fresh pwsh -Command processes on Windows	registers ctx.shell
pwsh-sandbox	Runs PowerShell commands confined through the sandbox capability	registers ctx.shell
shell-env	Supplies the managed DSH_* environment every shell command receives	ctx.shellEnv
tool-bash	Exposes Bash execution and background jobs to the model as the bash tool	registers on ctx.tools
tool-bash-persistent	Runs model shell calls in one owner-isolated persistent Bash session	registers on ctx.tools
tool-pwsh	Exposes PowerShell execution to the model as the pwsh tool	registers on ctx.tools
tool-pwsh-persistent	Runs model shell calls in one owner-isolated persistent PowerShell session	registers on ctx.tools

A profile layer selects exactly one executor implementation (the win32 layer swaps the POSIX rows for the pwsh ones; mounting two fails loudly at load time on the duplicate service registration) and the model-facing tools it needs. A sandboxed composition also selects a ctx.sandbox provider and ctx.sandboxPolicy; the base bundle owns the shipped wiring.

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Related documentation

• Bash executor subsystem — the shared request/spec vocabulary, results, background processes, and the complete service contract.
• Sandbox subsystem — the confinement capability the sandboxing executors consume.

Dev Note

None.