Files
pmg/sandbox/profiles
Claude d60a558579 feat(sandbox): scrub sensitive environment variables from package managers
Implements process-level environment variable protection per the spec.
When the sandbox is enabled, credential-bearing variables are removed from
the package manager child process before it is spawned, defending against
supply chain attacks that harvest secrets from the environment.

- DANGEROUS_ENV_VARS: curated default deny list of known secret names (no
  generic *_TOKEN/*_SECRET catch-alls); ScrubEnv matcher supports case-
  insensitive globs so profiles can opt into broader denies.
- EnvironmentPolicy (environment.allow / environment.deny) on sandbox
  profiles, merged under inheritance; deep-copied on resolve.
- npm/pypi profiles re-allow their own ecosystem's auth vars so package
  managers keep working; other ecosystems' and cloud creds stay scrubbed.
- New 'env' --sandbox-allow type (and overlay support via the same path):
  allow-only, value kept verbatim (not path-resolved), governed by lockdown.
- Enforced in executor.ApplySandbox as the last step before launch, after
  overlay and runtime overrides merge; scrubbed names logged for audit.

https://claude.ai/code/session_017Da1sAYLYpeEgogm6f9VYW
2026-06-10 07:17:14 +00:00
..

PMG Sandbox Profiles

This directory contains built-in sandbox policies for PMG package managers.

Available Profiles

npm-restrictive

Restrictive policy for the npm ecosystem (npm, pnpm, yarn, bun).

pypi-restrictive

Restrictive policy for the PyPI ecosystem (pip, pip3, poetry, uv).

Custom Policies

You can create custom sandbox policies by:

  1. Copying one of the built-in profiles
  2. Modifying the rules to suit your needs
  3. Referencing the custom profile in your PMG config:
sandbox:
  enabled: true
  policies:
    npm:
      enabled: true
      profile: /path/to/custom-npm-policy.yml

Policy Schema

See the Policy Schema Documentation for details on the YAML structure.

Supported Variables

  • ${HOME}: User home directory
  • ${CWD}: Current working directory
  • ${TMPDIR}: Temporary directory

Policy Enforcement

All policy violations will block execution. This provides defense-in-depth protection against malicious install scripts and supply chain attacks.