Grades are a hygiene check, not a security guarantee.

Claude Code, Skill

dif

Skills for authoring, validating and concluding feature flags and A/B tests kept as Markdown files with the dif CLI.

Compatibility: Not stated.

Grade B

Minor issues only, no Medium or High. Worth a quick look at the findings below before installing.

Graded by PlugVetRubric v2

Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.

Rescanned at commit 72faace26571, unchanged since the check below.

PERMISSION_DELETE_FILES NETWORK_NO_FIXED_HOST SECRETS_PATH_DOTENV INSTALL_DOCUMENTED_INSTALLER SECRETS_ENV_READ

Why this grade

  • PERMISSION_DELETE_FILES Low

    Contains a call that can delete files.

    cli/packages/cli/install.js, line 131 try { fs.unlinkSync(destPath); } catch { /* best-effort */ }

  • NETWORK_NO_FIXED_HOST Low

    Makes a network call whose host is not written as a fixed address.

    cli/crates/dif-cli/assets/claude/skills/dif-conclude-experiment/references/cloud-api.md, line 65 curl --fail-with-body -sS -H "Authorization: Bearer $DIF_TOKEN" "$DIF_CLOUD_URL/v1/projects?repo=$REPO"

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    .gitignore, line 1 .env

  • INSTALL_DOCUMENTED_INSTALLER Note

    Documentation shows an installer that pipes a download into a shell.

    README.md, line 58 curl -fsSL https://dif.sh/install.sh | sh

  • SECRETS_ENV_READ Note

    Reads an environment variable whose name contains KEY, SECRET, TOKEN, PASSWORD or CREDENTIAL.

    cli/packages/sdk/src/server.ts, line 4 // const dif = new DifServer({ apiKey: process.env.DIF_KEY });

Any High, or two or more Medium findings, give D. One Medium gives C. Low findings or a security Note give B. Each code names a finding behind the letter.

Grades are a hygiene check of the source at the commit shown, on the date checked, not a security audit or a guarantee. The free directory grades are automated. Before release, a PlugVet engineer reviews every paid report and any grade we hold back, including all F grades, against the source code and the evidence we quote.

What was checked

Plain notes from the hygiene checks.

  • Permissions

    Concern

    can delete files.

    PERMISSION_DELETE_FILES

    cli/packages/cli/install.js, line 131

    try { fs.unlinkSync(destPath); } catch { /* best-effort */ }

    cli/packages/cli/install.js, line 171

    try { fs.unlinkSync(sumPath); } catch { /* best-effort */ }

    cli/packages/cli/install.js, line 261

    fs.unlinkSync(found);

    Show more

    cli/packages/cli/install.js, line 267

    try { fs.unlinkSync(tmp); } catch (_) { /* best-effort */ }

    cli/packages/cli/install.js, line 268

    try { fs.rmSync(staging, { recursive: true, force: true }); } catch (_) { /* best-effort */ }

  • Install and update

    Note

    README documents an installer that pipes a download into a shell. The docs document an installer that pipes a download into a shell.

    INSTALL_DOCUMENTED_INSTALLER

    README.md, line 58

    curl -fsSL https://dif.sh/install.sh | sh

    cli/packages/cli/README.md, line 20

    curl -fsSL https://dif.sh/install.sh | sh

    skills/dif-docs/SKILL.md, line 13

    npm install -D @dif.sh/cli # or: curl -fsSL https://dif.sh/install.sh | sh

  • Network

    Concern

    can reach a host that is not written as a fixed address.

    NETWORK_NO_FIXED_HOST

    cli/crates/dif-cli/assets/claude/skills/dif-conclude-experiment/references/cloud-api.md, line 65

    curl --fail-with-body -sS -H "Authorization: Bearer $DIF_TOKEN" "$DIF_CLOUD_URL/v1/projects?repo=$REPO"

    cli/crates/dif-cli/assets/claude/skills/dif-conclude-experiment/references/cloud-api.md, line 66

    curl --fail-with-body -sS -H "Authorization: Bearer $DIF_TOKEN" "$DIF_CLOUD_URL/v1/projects/<slug>/overview"

    cli/crates/dif-cli/assets/claude/skills/dif-conclude-experiment/references/cloud-api.md, line 67

    curl --fail-with-body -sS -H "Authorization: Bearer $DIF_TOKEN" "$DIF_CLOUD_URL/v1/projects/<slug>/experiments/<id>/results"

    Show more

    cli/crates/dif-cli/assets/claude/skills/dif-conclude-experiment/references/cloud-api.md, line 68

    curl --fail-with-body -sS -H "Authorization: Bearer $DIF_TOKEN" "$DIF_CLOUD_URL/v1/projects/<slug>/learnings?surface=<surface>&limit=20"

    cli/crates/dif-cli/assets/claude/skills/dif-triage-experiments/references/cloud-api.md, line 65

    curl --fail-with-body -sS -H "Authorization: Bearer $DIF_TOKEN" "$DIF_CLOUD_URL/v1/projects?repo=$REPO"

    cli/crates/dif-cli/assets/claude/skills/dif-triage-experiments/references/cloud-api.md, line 66

    curl --fail-with-body -sS -H "Authorization: Bearer $DIF_TOKEN" "$DIF_CLOUD_URL/v1/projects/<slug>/overview"

    cli/crates/dif-cli/assets/claude/skills/dif-triage-experiments/references/cloud-api.md, line 67

    curl --fail-with-body -sS -H "Authorization: Bearer $DIF_TOKEN" "$DIF_CLOUD_URL/v1/projects/<slug>/experiments/<id>/results"

    cli/crates/dif-cli/assets/claude/skills/dif-triage-experiments/references/cloud-api.md, line 68

    curl --fail-with-body -sS -H "Authorization: Bearer $DIF_TOKEN" "$DIF_CLOUD_URL/v1/projects/<slug>/learnings?surface=<surface>&limit=20"

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_DOTENV

    cli/packages/sdk/src/server.ts, line 4

    // const dif = new DifServer({ apiKey: process.env.DIF_KEY });

    .gitignore, line 1

    .env

    cli/crates/dif-cli/assets/claude/skills/dif-conclude-experiment/references/cloud-api.md, line 91

    - Do not write the token into `.env`, `.mcp.json` or any other file.

    Show more

    cli/crates/dif-cli/assets/claude/skills/dif-triage-experiments/references/cloud-api.md, line 91

    - Do not write the token into `.env`, `.mcp.json` or any other file.

    skills/dif-conclude-experiment/references/cloud-api.md, line 91

    - Do not write the token into `.env`, `.mcp.json` or any other file.

    skills/dif-triage-experiments/references/cloud-api.md, line 91

    - Do not write the token into `.env`, `.mcp.json` or any other file.

  • Agent instructions

    Pass

    No instruction to ignore earlier instructions or to hide a step.

  • Obfuscation

    Pass

    No encoded or minified payload found.

  • Licence

    Pass

    A licence file is present (LICENSE).

  • Maintainer activity

    Pass

    The latest commit is within the last 365 days.

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Note

Hygiene check of commit 72faace26571. can delete files. README documents an installer that pipes a download into a shell. The docs document an installer that pipes a download into a shell. can reach a host that is not written as a fixed address. reads a credential or environment file.

Date and source

Date checked:

View source

github.com

Commit graded: 72faace26571806ab3528f9857f8a6c6e8506b28

This link goes to the original host. PlugVet does not host or check what you download from there, and installing it is your own decision and risk.

Read how this letter is chosen