posit-dev / posit-dev/mcp-repl

Add sandbox mode with restricted file reads

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Dominant language
Rust
Stars
70
Forks
5
PR merge metrics
No merged PRs in 30d

Description

The sandbox should support file-read restrictions, not only restricted writes and restricted network.

When harness-specific sandbox settings are available, mcp-repl should detect them and match them. Otherwise, a sensible default would be workspace-read.

This should also leave room for a future mcp-repl configuration layer that exposes sandbox options more explicitly.

Source: https://github.com/posit-dev/mcp-repl/issues/28

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by tracing the existing restricted-write and restricted-network sandbox handling, then inspect how harness-specific settings are detected. Add matching file-read restrictions, use workspace-read when no harness settings are available, and leave a clear boundary for future mcp-repl sandbox configuration.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
security
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
48/100

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