Skills/PyPI/linebreak-gate

linebreak-gate@1.10.3

VERIFIED· not started

Publisher claims: "LineBreak security gate at the git/CI boundary: dependency CVE scan + AI SAST, human-approved overrides, git-native audit records" Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry PyPI (MCP server) · listed in the official MCP RegistryPublisher baktun-studio · publishing for 135 daysInstalls 1,541Last detonated 4d ago
$claude mcp add linebreak-gate -- uvx linebreak-gate
WatchReport an issue

Coverage

Not started: dependency install failed; the server itself was not observed.
Tested
the dependency install step · every file read, file written and host contacted by what ran
Not tested
server startup · the tool list · tool behavior

What this means for the label: Verified here covers what ran. The server's tools were not exercised with a real credential, so nothing about their behavior is asserted; the credential summary below says what to do with that.

Before you give it your token

It will ask for
ANTHROPIC_API_KEYLINEBREAK_LICENSE_KEYConfiguration, not credentials: LINEBREAK_ENTITLEMENTS_PROVIDER, LINEBREAK_GATE_MODEL, LINEBREAK_LICENSE_BASE_URL, LINEBREAK_OSV_SCANNER_BIN
Where it talks to
no vendor host named in the codeAlso linebreakapp.com, osv.dev — not the publisher's domain; check what for before connecting.
What the honeypot saw
no credential files read · no network
What we could not test
server startup · the tool list · tool behavior

Connect it with a scoped credential, under the guard, and read the third-party hosts first. The code names linebreakapp.com, osv.dev as well as its own vendor. The guard injects ANTHROPIC_API_KEY, LINEBREAK_LICENSE_KEY only into requests to the host you bind (and its subdomains) and refuses the rest.

$vet-skills run --net declared -- uvx linebreak-gate

Never paste a credential into a chat, a ticket or a report, including ours. How the guard holds it.

Is [email protected] safe to install?

KillerSkills ran it in the KillerSkills honeypot sandbox (2 scenarios; not started: dependency install failed; the server itself was not observed) on 2026-11-10 and scored it 84/100 (Verified). In what ran, nothing we could detect went wrong: no undeclared network egress, no credential reads, no persistent instruction writes. What it does with a real credential was not observed; the static findings and the publisher carry the rest of the score. Summary: no network, touches nothing outside the project, writes no memory.

Behavior trace

Honeypot run · 0 s · 2 scenarios · 0 deviations
t+CategoryObserved action
0.0sprocessno install scripts in bundle
0.1sprocessdependency install exit 1 ·
0.1sclaimednot started: dependency install failed (exit 1); the server itself was not observed
0.1sprocessscript backend runs setup only
0.1sprocessno install scripts to re-run

Static findings

MEDIUM
URL with embedded credentialstests/test_init_cmd.py:213 · URL with embedded credentials — may be phishing or credential leaking"https://x-access-token:[email protected]/acme/backend.git"Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST07
MEDIUM
Python subprocess execution detectedtests/test_mcp_stdio_e2e.py:148 · Python subprocess execution detectedproc = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedsrc/linebreak_gate/criteria_check.py:274 · Python subprocess execution detectedresult = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedsrc/linebreak_gate/criteria_check.py:260 · Python subprocess execution detectedproc = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_mcp_server.py:151 · Python subprocess execution detectedproc = subprocess.run([sys.executable, "-c", code], capture_output=True, text=True, check=False)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
HIGH
URL with embedded credentialssrc/linebreak_gate/init_cmd.py:51 · URL with embedded credentials — may be phishing or credential leakingr"(?:git@github\.com:|https://(?:[^@/\s]+@)?github\.com/|ssh://git@github\.com(?::\d+)?/)"Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST07
MEDIUM
Python subprocess execution detectedtests/test_cli_spec_approve.py:40 · Python subprocess execution detectedreturn subprocess.run(["git", *args], cwd=root, capture_output=True, text=True, check=False)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_mcp_stdio_e2e.py:87 · Python subprocess execution detectedproc = subprocess.Popen(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
File permission modification commandaction.yml:92 · File permission modification command — agent changes file ownership/permissionschmod +x "$bin"Fix: Request the narrowest permission that works; replace wildcards with the exact paths or hosts.
AST05
MEDIUM
Python subprocess execution detectedsrc/linebreak_gate/spec_write.py:136 · Python subprocess execution detectedreturn subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05

Cost to the agent

Instructions loaded
≈70 tok
1 file · 57 in bundle
Tool list per prompt
≈0 tok
0 tools · 0 per tool
Handshake
no reply
launch to tools/list, stdio
Undocumented tools
0
description under 20 chars · avg 0

Tokens estimated at four characters each. The tool list is re-read by the agent on every turn, so it is the number to compare between servers that do the same job: ranked across the index.

Known vulnerabilities

No advisories in OSV for linebreak-gate@1.10.3 as of 4d ago. This is the package itself, not its dependencies.