Claude Code, Skill
Oh My Cassette
Edit local project media through a self-contained stdio MCP runtime that connects directly to Cassette.
Compatibility: Not stated.
Grade D
Two or more Medium findings, or a High finding. Only try it in a sandbox.
Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.
Rescanned at commit 4bebe25e619b, unchanged since the check below.
INSTALL_REMOTE_SCRIPT SECRETS_PATH_CREDENTIAL
Why this grade
- INSTALL_REMOTE_SCRIPT Medium
Fetches a script from the network and runs it (a pipe to a shell, or an install hook with a URL).
README.md, line 212
curl -fsSL https://raw.githubusercontent.com/NousResearch/hermes-agent/main/scripts/install.sh | bash - SECRETS_PATH_CREDENTIAL Medium
Mentions a credential store path (~/.ssh, id_rsa, .npmrc, .aws/credentials, credentials.json, .netrc).
runtime_config.py, line 114
return config_root() / "credentials.json"
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.
If you think this grade is wrong, email [email protected] with the entry link and your evidence. We aim to acknowledge within two working days and decide within seven. If we confirm an error, we aim to correct it within 24 hours of confirming it. These are aims, not guarantees.
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
core/api_transport.py, line 443
proc = subprocess.run(
core/api_transport.py, line 478
proc = subprocess.run(
core/api_transport.py, line 603
proc = subprocess.run(
Show more
core/api_transport.py, line 1754
proc = subprocess.run(
core/api_transport.py, line 1821
proc = subprocess.run(
core/api_transport.py, line 1872
subprocess.run(
core/jobs.py, line 238
proc = subprocess.Popen(
core/manifest.py, line 121
shutil.rmtree(path)
core/manifest.py, line 656
proc = subprocess.run(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
scripts/install_opencode.py, line 131
shutil.rmtree(previous, ignore_errors=True)
scripts/install_opencode.py, line 135
shutil.rmtree(previous, ignore_errors=True)
scripts/install_opencode.py, line 137
shutil.rmtree(staging, ignore_errors=True)
scripts/install_plugin.py, line 69
shutil.rmtree(path)
Install and update
Serious
install fetches a script from the network. README documents an installer that pipes a download into a shell.
INSTALL_REMOTE_SCRIPT INSTALL_DOCUMENTED_INSTALLER
README.md, line 212
curl -fsSL https://raw.githubusercontent.com/NousResearch/hermes-agent/main/scripts/install.sh | bash
README.md, line 263
curl -LsSf https://astral.sh/uv/install.sh | sh
README.zh-cn.md, line 206
curl -fsSL https://raw.githubusercontent.com/NousResearch/hermes-agent/main/scripts/install.sh | bash
Show more
README.zh-cn.md, line 256
curl -LsSf https://astral.sh/uv/install.sh | sh
Network
Concern
can reach raw.githubusercontent.com. The description does not name that host. can reach a host that is not written as a fixed address.
NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST
mcp_plugin/update_check.py, line 41
"curl -fsSL https://raw.githubusercontent.com/Cassette-Editor/oh-my-cassette/"
scripts/install_opencode.py, line 13
curl -fsSL https://raw.githubusercontent.com/Cassette-Editor/oh-my-cassette/release/scripts/install_opencode.py | python3 -
scripts/install_opencode.py, line 117
with urllib.request.urlopen(url, timeout=DOWNLOAD_TIMEOUT_SEC) as response: # noqa: S310 - fixed https URL
Secrets
Concern
reads a credential or environment file.
SECRETS_ENV_READ SECRETS_PATH_CREDENTIAL SECRETS_PATH_DOTENV
runtime_config.py, line 4
``~/.hermes/.env``. The local MCP runtime deliberately uses a separate,
runtime_config.py, line 114
return config_root() / "credentials.json"
runtime_config.py, line 286
return _absolute_lexical(root / ".env")
Show more
runtime_config.py, line 452
str(os.getenv("CASSETTE_AUTH_PASSWORD", "") or "").strip()
runtime_config.py, line 453
or str(os.getenv("CASSETTE_PASSWORD", "") or "").strip()
core/api_transport.py, line 166
# process env. Hermes retains its historical ~/.hermes/.env fallback.
core/gateway.py, line 152
token = str(getattr(adapter, "_access_token", "") or os.getenv("QQ_ACCESS_TOKEN", "")).strip()
core/tools.py, line 1284
# Hermes resolves credentials from its process env and ~/.hermes/.env, and
core/tools.py, line 1291
"and CASSETTE_AUTH_PASSWORD in ~/.hermes/.env instead.",
core/transport.py, line 57
# its historical ~/.hermes/.env resolution.
core/worker.py, line 20
# ~/.hermes/.env - so an MCP password reset appears to do nothing and every job
mcp_plugin/runtime.py, line 101
token = str(os.getenv("CASSETTE_AUTH_TOKEN", "") or "").strip()
mcp_plugin/runtime.py, line 153
token = str(os.getenv("CASSETTE_AUTH_TOKEN", "") or "")
scripts/e2e_local_mcp.py, line 60
default=os.getenv("CASSETTE_E2E_ACCEPTANCE_HOOK_TOKEN", ""),
scripts/setup_local_mcp.py, line 425
password = str(os.getenv("CASSETTE_AUTH_PASSWORD") or os.getenv("CASSETTE_PASSWORD") or "")
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.
Note
Hygiene check of commit 4bebe25e619b. can delete files. install fetches a script from the network. README documents an installer that pipes a download into a shell. can reach raw.githubusercontent.com. The description does not name that host. can reach a host that is not written as a fixed address. reads a credential or environment file.
Date and source
Date checked:
github.com
Commit graded: 4bebe25e619ba7b9a0c00806b56e720ab44463eb
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.