Skills/PyPI/muscle-memory-mcp

muscle-memory-mcp@0.1.1

VERIFIED· not started

Publisher claims: "MCP server that gives your agent a library of its own tested, reusable scripts." Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry PyPI (MCP server)Publisher johannesloor · publishing for 13 daysInstalls 0Last detonated 39 h ago
$claude mcp add muscle-memory-mcp -- uvx muscle-memory-mcp
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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

It will ask for
no credential variables read in the code
Where it talks to
no vendor host named in the code
What the honeypot saw
no credential files read · no network
What we could not test
server startup · the tool list · tool behavior

Connect it under the guard. Not started: dependency install failed; the server itself was not observed. The code names no credential variable; the guard pins the network to what the honeypot saw and logs every call.

$vet-skills run --net declared -- uvx muscle-memory-mcp

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 2026-11-12 and scored it 85/100 (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
Python subprocess execution detectedsrc/muscle_memory_mcp/onboarding.py:53 · Python subprocess execution detectedsubprocess.run(["git", "-C", str(root), "config", "--local", PUSH_KEY, "true" if push else "false"],Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedsrc/muscle_memory_mcp/onboarding.py:131 · Python subprocess execution detectedout = subprocess.run(["git", "-C", str(project), "rev-parse", "--git-path", "info/exclude"],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:46 · Python subprocess execution detectedsubprocess.run(["git", "-C", str(self.d), "config", "user.email", "t@t"], check=True)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedsrc/muscle_memory_mcp/runners.py:140 · Python subprocess execution detectedr = subprocess.run(argv, cwd=str(cwd), env=child_env, 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_core.py:45 · Python subprocess execution detectedsubprocess.run(["git", "init", "-q", str(self.d)], check=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_hardening.py:329 · Python subprocess execution detectedg = lambda *a: subprocess.run(["git", "-C", str(self.personal), *a], check=True, 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_e2e.py:81 · 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_hardening.py:20 · Python subprocess execution detected"assert subprocess.check_output([sys.executable, os.environ['MM_SCRIPT']]).decode().strip() == 'ok'\n")Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_hardening.py:219 · Python subprocess execution detected"assert subprocess.check_output([shutil.which('bash'), os.environ['MM_SCRIPT']]).decode().strip() == 'hi'\n")Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_hardening.py:191 · Python subprocess execution detected"r = subprocess.run([sys.executable, os.environ['MM_SCRIPT'], 'Jo'], capture_output=True, text=True)\n"Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_libraries.py:167 · Python subprocess execution detected" out = subprocess.run([sys.executable, os.environ['MM_SCRIPT']], capture_output=True, encoding='utf-8').stdout\n"Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedsrc/muscle_memory_mcp/onboarding.py:98 · Python subprocess execution detectedsubprocess.run(["git", "init", str(root)], check=True, capture_output=True,Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Access to sensitive file pathstests/test_core.py:95 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesfor bad in ["../etc/passwd", "missing.py", "INDEX.md", "../mm.py"]:Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Python subprocess execution detectedtests/test_core.py:48 · Python subprocess execution detectedsubprocess.run(["git", "-C", str(self.d), "commit", "-q", "--allow-empty", "-m", "init"], check=True)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedsrc/muscle_memory_mcp/onboarding.py:80 · Python subprocess execution detectedsubprocess.run(["git", "clone", "--", remote, str(root)], check=True, 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_core.py:47 · Python subprocess execution detectedsubprocess.run(["git", "-C", str(self.d), "config", "user.name", "t"], check=True)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedsrc/muscle_memory_mcp/paths.py:41 · Python subprocess execution detectedout = subprocess.run(["git", "-C", str(cwd), "rev-parse", "--show-toplevel"],Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_libraries.py:159 · Python subprocess execution detected" out = subprocess.run([sys.executable, os.environ['MM_SCRIPT']], capture_output=True, encoding='utf-8').stdout\n"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:28 · Python subprocess execution detectedout = subprocess.run([sys.executable, str(Path(__file__).resolve().parents[1] / 'scripts' / 'double.py'), '21'],Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_hardening.py:51 · Python subprocess execution detectedreturn subprocess.run([sys.executable, "-m", "muscle_memory_mcp"], input="\n".join(lines) + "\n",Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_libraries.py:191 · Python subprocess execution detected" out = subprocess.run([sys.executable, os.environ['MM_SCRIPT']], capture_output=True, encoding='utf-8').stdout\n"Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_onboarding.py:77 · Python subprocess execution detectedsubprocess.run(["git", "-C", str(project), "config", "user.name", "Task Test"], check=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_onboarding.py:62 · Python subprocess execution detectedsubprocess.run(["git", "init", "--bare", str(bare)], check=True, 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_onboarding.py:12 · Python subprocess execution detected"assert subprocess.check_output([sys.executable, os.environ['MM_SCRIPT']]).decode().strip() "Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_onboarding.py:76 · Python subprocess execution detectedsubprocess.run(["git", "init", "-q", str(project)], check=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_testing.py:114 · Python subprocess execution detectedf" def test_run(self): self.assertEqual(subprocess.check_output([{bash_path!r}, os.environ['MM_SCRIPT'], 'Jo'], encoding='utf-8').strip(), 'hi Jo')\n"Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_testing.py:22 · Python subprocess execution detectedout = subprocess.run([sys.executable, script, '21'], 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_testing.py:140 · Python subprocess execution detectedsubprocess.run(["git", "-C", str(self.d), "config", "user.name", "t"], check=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_server.py:38 · Python subprocess execution detectedsubprocess.run(["git", "-C", str(self.d), "config", "user.name", "t"], check=True)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
LOW
Instructs the agent to modify its persistent memory or instruction filesPKG-INFO:76 · Instructs the agent to modify its persistent memory or instruction files · informational: not an instruction file## Add to your AGENTS.mdFix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01
MEDIUM
Python subprocess execution detectedtests/test_server.py:71 · Python subprocess execution detectedout = subprocess.run([sys.executable, "-m", "muscle_memory_mcp"],Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_onboarding.py:78 · Python subprocess execution detectedsubprocess.run(["git", "-C", str(project), "config", "user.email", "[email protected]"], check=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_packaging.py:31 · Python subprocess execution detectedsubprocess.run([UV, "build", *extra_args, "--out-dir", str(self.dist)],Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_testing.py:139 · Python subprocess execution detectedsubprocess.run(["git", "-C", str(self.d), "config", "user.email", "t@t"], check=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_trust.py:114 · Python subprocess execution detectedself.branch = subprocess.check_output(["git", "-C", str(self.personal), "branch", "--show-current"],Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_testing.py:138 · Python subprocess execution detectedsubprocess.run(["git", "init", "-q", str(self.d)], check=True)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
LOW
Instructs the agent to modify its persistent memory or instruction filesREADME.md:60 · Instructs the agent to modify its persistent memory or instruction files · informational: not an instruction fileAdd this standing rule to your `AGENTS.md`, `CLAUDE.md`, `SOUL.md` or equivalent agent instructions:Fix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01
LOW
Instructs the agent to modify its persistent memory or instruction filesREADME.md:58 · Instructs the agent to modify its persistent memory or instruction files · informational: not an instruction file## Add to your AGENTS.mdFix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01
MEDIUM
Python subprocess execution detectedtests/test_server.py:37 · Python subprocess execution detectedsubprocess.run(["git", "-C", str(self.d), "config", "user.email", "t@t"], check=True)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
LOW
Instructs the agent to modify its persistent memory or instruction filestests/test_docs.py:40 · Instructs the agent to modify its persistent memory or instruction files · informational: not an instruction fileself.assertLess(self.text.index("## Install"), self.text.index("## Add to your AGENTS.md"))Fix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01
MEDIUM
Python subprocess execution detectedtests/test_trust.py:13 · Python subprocess execution detected"assert subprocess.check_output([sys.executable, os.environ['MM_SCRIPT']]).decode().strip() == 'safe'\n")Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_trust.py:103 · Python subprocess execution detectedsubprocess.run(["git", "-C", str(self.personal), *args], check=True, 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_store.py:13 · Python subprocess execution detectedGOOD_TEST = "import os, subprocess, sys\nassert subprocess.check_output([sys.executable, os.environ['MM_SCRIPT']]).decode().strip() == 'ok'\n"Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_trust.py:129 · Python subprocess execution detectedremote_head = subprocess.check_output(["git", "--git-dir", str(self.remote), "rev-parse", self.branch],Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_server.py:36 · Python subprocess execution detectedsubprocess.run(["git", "init", "-q", str(self.d)], check=True)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
LOW
Instructs the agent to modify its persistent memory or instruction filestests/test_docs.py:27 · Instructs the agent to modify its persistent memory or instruction files · informational: not an instruction file"## Add to your AGENTS.md"):Fix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01
MEDIUM
Python subprocess execution detectedtests/test_server.py:39 · Python subprocess execution detectedsubprocess.run(["git", "-C", str(self.d), "commit", "-q", "--allow-empty", "-m", "init"], check=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_store.py:19 · Python subprocess execution detectedreturn subprocess.run(["git", "-C", str(cwd), *args], capture_output=True, encoding="utf-8",Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_trust.py:105 · Python subprocess execution detectedsubprocess.run(["git", "init", "--bare", str(self.remote)], check=True, capture_output=True)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
LOW
Instructs the agent to modify its persistent memory or instruction filesPKG-INFO:78 · Instructs the agent to modify its persistent memory or instruction files · informational: not an instruction fileAdd this standing rule to your `AGENTS.md`, `CLAUDE.md`, `SOUL.md` or equivalent agent instructions:Fix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01
LOW
Instructs the agent to modify its persistent memory or instruction filestests/test_docs.py:37 · Instructs the agent to modify its persistent memory or instruction files · informational: not an instruction file"## Install", "## Add to your AGENTS.md", "## First run and storage",Fix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01

Cost to the agent

Instructions loaded
≈59 tok
1 file · 32 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 muscle-memory-mcp@0.1.1 as of 39 h ago. This is the package itself, not its dependencies.