Yichen Jiang
80bbdba617
The consuming shell read on master told the model where a truncated stream's complete text lived: [some output was dropped from memory; full output: <paths>]. The ring-backed read rendered a notice only for the ring's own eviction and ignored the gapBefore mark the pump puts on a chunk whose source lost bytes between two polls, so a fast producer's tail read as continuous output and no path survived. A lossy source read now carries the source's spillPath onto its gap chunk (JobSourceRead, JobAppendOptions, JobChunk), the pump forwards it, the ring retains it, and the model renderer emits master's notice for a producer-side gap or a ring eviction, listing the distinct spill files in offset order. The bash and pwsh sources already returned the subprocess reader's spillPath; the type now admits it.
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
English | 中文
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
| 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 loud 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.
Related documentation
- Bash executor subsystem — the shared request/spec vocabulary, results, background processes, and the service contract.
- Sandbox subsystem — the confinement capability the sandboxing executors consume.
Dev Note
None.