Skills/PyPI/mcp-bifrost

mcp-bifrost@0.1.5

VERIFIED· not started

Publisher claims: "An MCP server that delegates mechanical code edits to a cheap worker model, validates them through a chain of gates, and applies them atomically." Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry PyPI (MCP server)Publisher fixembcn · publishing for 83 daysInstalls 161Last detonated 8d ago
$claude mcp add mcp-bifrost -- uvx mcp-bifrost
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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

Code inventory arrives with this version's next honeypot run.
It will ask for
unknown until the next run
Where it talks to
unknown until the next run
What the honeypot saw
no credential files read · no network
What we could not test
server startup · the tool list · tool behavior

Not enough was observed to say yet. Not started: dependency install failed; the server itself was not observed. This version's code has not been inventoried for credentials and hosts either; both arrive with its next honeypot run (popular servers first). `vet-skills try mcp-bifrost` runs it now and prints the full answer.

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 2026-11-07 and scored it 86/100 (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
0.1sprocessexec /usr/bin/date
0.1sprocessexec /usr/bin/timeout
0.1sprocessexec .venv/bin/mcp-bifrost
0.1sclaimedno tools/list reply (exit 0)
0.2sprocessscript backend runs setup only
0.2sprocessno install scripts to re-run

Static findings

MEDIUM
AWS access key pattern detectedtests/test_heimdall.py:43 · AWS access key pattern detected — possible hardcoded or harvested key"aws-access-key": b'$id = "AKIAABCDEFGHIJKLMNOP";',Fix: Never read or enumerate credential locations; accept a documented environment variable instead.
AST03
MEDIUM
File permission modification commandmcp_bifrost/worker.py:194 · File permission modification command — agent changes file ownership/permissions"DEEPSEEK_API_KEY=sk-... (chmod 600, and keep it out of "Fix: Request the narrowest permission that works; replace wildcards with the exact paths or hosts.
AST05
MEDIUM
Python subprocess execution detectedtests/test_containers.py:283 · Python subprocess execution detectedsubprocess.run(["git", "-C", str(self.repo), "add", "-A"], check=True)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedmcp_bifrost/patcher.py:83 · 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 detectedmcp_bifrost/vcs.py:40 · Python subprocess execution detectedreturn subprocess.run(cmd, **kwargs)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedmcp_bifrost/patcher.py:71 · 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 detectedmcp_bifrost/vcs.py:161 · Python subprocess execution detectedproc = subprocess.run(args, cwd=str(st.root), capture_output=True,Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_containers.py:284 · Python subprocess execution detectedsubprocess.run(["git", "-C", str(self.repo), "commit", "-qm", "i"],Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_containers.py:147 · Python subprocess execution detectedproc = subprocess.run(["php", "-l", str(out)],Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_cases.py:52 · Python subprocess execution detectedreturn 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_e2e.py:56 · Python subprocess execution detectedself.proc = subprocess.Popen(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedmcp_bifrost/languages/php.py:46 · Python subprocess execution detectedreturn subprocess.run(cmd, **kwargs)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_containers.py:279 · Python subprocess execution detectedsubprocess.run(["git", "-C", str(self.repo), "config", key, value],Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_core.py:63 · Python subprocess execution detectedreturn 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_containers.py:277 · Python subprocess execution detectedsubprocess.run(["git", "-C", str(self.repo), "init", "-q"], check=True)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedmcp_bifrost/patcher.py:38 · 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_heimdall.py:58 · Python subprocess execution detectedreturn 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_vcs.py:35 · Python subprocess execution detectedproc = subprocess.run(["git", "-C", str(repo), *args],Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_vcs.py:167 · Python subprocess execution detectedremote_head = 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_vcs.py:156 · Python subprocess execution detectedsubprocess.run(["git", "init", "-q", "--bare", str(self.remote)],Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
AWS access key pattern detectedtests/test_heimdall.py:310 · AWS access key pattern detected — possible hardcoded or harvested keysecret = '$id = "AKIAABCDEFGHIJKLMNOP";'Fix: Never read or enumerate credential locations; accept a documented environment variable instead.
AST03
MEDIUM
Python subprocess execution detectedtests/test_range_revert.py:87 · Python subprocess execution detectedproc = subprocess.run(["git", "-C", str(self.repo), *args],Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_e2e.py:117 · Python subprocess execution detectedproc = subprocess.run(["git", "-C", str(repo), *args],Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
AWS access key pattern detectedtests/test_heimdall.py:199 · AWS access key pattern detected — possible hardcoded or harvested key'$a = "AKIAABCDEFGHIJKLMNOP";',Fix: Never read or enumerate credential locations; accept a documented environment variable instead.
AST03
MEDIUM
AWS access key pattern detectedtests/test_heimdall.py:189 · AWS access key pattern detected — possible hardcoded or harvested key'$id = "AKIAABCDEFGHIJKLMNOP";',Fix: Never read or enumerate credential locations; accept a documented environment variable instead.
AST03
MEDIUM
AWS access key pattern detectedtests/test_heimdall.py:247 · AWS access key pattern detected — possible hardcoded or harvested keyb'$prod = "AKIAIOSFODNN7XYZABCD"; // see example below',Fix: Never read or enumerate credential locations; accept a documented environment variable instead.
AST03
MEDIUM
Python subprocess execution detectedtests/test_generation.py:45 · Python subprocess execution detectedreturn subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Slack token pattern detectedtests/test_heimdall.py:46 · Slack token pattern detected — possible hardcoded or harvested token"slack-token": b'$t = "xoxb-1234567890-abcdefghijklmnop";',Fix: Never read or enumerate credential locations; accept a documented environment variable instead.
AST03

Cost to the agent

Instructions loaded
≈72 tok
1 file · 38 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 mcp-bifrost@0.1.5 as of 7 h ago. This is the package itself, not its dependencies.