devcontainer-setup SKILL.md skillA
devcontainer-setup from trailofbits/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add trailofbits/skills/devcontainer-setup@git:20260429.cad5abdPins git:20260429.cad5abd in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- trailofbits/skills
- Path
plugins/devcontainer-setup/skills/devcontainer-setup/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260429.cad5abd, committed Apr 29, 2026
- First version recorded
- Feb 10, 2026
- Size
- 8,060 bytes
- Repository stars
- 8,043
- License
- CC-BY-SA-4.0
Creates devcontainers with Claude Code, language-specific tooling (Python/Node/Rust/Go), and persistent volumes. Use when adding devcontainer support to a project, setting up isolated development environments, or configuring sandboxed Claude Code workspaces.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Devcontainer Setup Skill
Creates a pre-configured devcontainer with Claude Code and language-specific tooling.
## When to Use
- User asks to "set up a devcontainer" or "add devcontainer support"
- User wants a sandboxed Claude Code development environment
- User needs isolated development environments with persistent configuration
## When NOT to Use
- User already has a devcontainer configuration and just needs modifications
- User is asking about general Docker or container questions
- User wants to deploy production containers (this is for development only)
## Workflow
```mermaid
flowchart TB
start([User requests devcontainer])
recon[1. Project Reconnaissance]
detect[2. Detect Languages]
generate[3. Generate Configuration]
write[4. Write files to .devcontainer/]
done([Done])
start --> recon
recon --> detect
detect --> generate
generate --> write
write --> done
```
## Phase 1: Project Reconnaissance
### Infer Project Name
Check in order (use first match):
1. `package.json` → `name` field
2. `pyproject.toml` → `project.name`
3. `Cargo.toml` → `package.name`
4. `go.mod` → module path (last segment after `/`)
…Read the whole file at its exact version.
How to install
mdr add trailofbits/skills/devcontainer-setup@sha256:ef698feec8a76cf8The line at the top of this page pins the label git:20260429.cad5abd, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_w4yuom4obnrpb7wv)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Feb 10, 2026 and Apr 29, 2026, about one every 39 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260429.cad5abd latest | 2026-04-29 | cad5abd | 8,060 B | A | view · diff |
| git:20260219.7e885f5 | 2026-02-19 | 7e885f5 | 7,842 B | A | view · diff |
| git:20260210.5438169 | 2026-02-10 | 5438169 | 7,814 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (8060 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
trailofbits/skills · 8,043 stars · license CC-BY-SA-4.0 · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_w4yuom4obnrpb7wv GET https://markdownregistry.com/api/v1/resolve?ref=trailofbits/skills/devcontainer-setup GET https://markdownregistry.com/api/v1/blob/ef698feec8a76cf89f283c07632a2ce92378cb34e030f6c2ca13f312a7393e39
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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