MCP, MCP server
coworker
Open-source AI agent built with Mastra.
Compatibility: Not stated.
Grade D
Two or more Medium findings, or a High. Only try it in a sandbox.
Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.
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).
package.json, line 28
@mastra/ai-sdk - SECRETS_PATH_CREDENTIAL Medium
Mentions a credential store path (~/.ssh, id_rsa, .npmrc, .aws/credentials, credentials.json, .netrc).
src/mastra/agents/coworker/prompts/base.ts, line 162
Don't commit files likely to contain secrets (\`.env\`, \`*.key\`, \`credentials.json\`). Warn if asked.
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
src/mastra/agents/coworker/workspace.ts, line 61
if (skillPaths.some(sp => target.startsWith(sp))) fs.unlinkSync(p);
src/mastra/config/fs-config.ts, line 38
try { fs.unlinkSync(configPath(filename)); } catch {}
src/mastra/config/seed-skills.ts, line 36
fs.rmSync(dest, { recursive: true, force: true });
Show more
src/mastra/config/seed-skills.ts, line 49
try { fs.unlinkSync(link); } catch {}
src/mastra/whatsapp/whatsapp-manager.ts, line 152
fs.rmSync(this.authDir, { recursive: true, force: true });
src/mastra/whatsapp/whatsapp-manager.ts, line 245
fs.rmSync(this.authDir, { recursive: true, force: true });
Install and update
Serious
install fetches a script from the network.
INSTALL_REMOTE_SCRIPT
package.json, line 28
@mastra/ai-sdk
Dockerfile, line 28
curl -fsSL https://deb.nodesource.com/setup_22.x | bash - && \
Network
Concern
can reach a host that is not written as a fixed address.
NETWORK_NO_FIXED_HOST
app/src/renderer/src/mastra-client.ts, line 183
const res = await fetch(`${MASTRA_BASE_URL}/agent-config`, { headers: authHeaders() })
app/src/renderer/src/mastra-client.ts, line 192
const res = await fetch(`${MASTRA_BASE_URL}/agent-config`, {
app/src/renderer/src/mastra-client.ts, line 267
const res = await fetch(`${MASTRA_BASE_URL}/scheduled-tasks`, { headers: authHeaders() })
Show more
app/src/renderer/src/mastra-client.ts, line 278
const res = await fetch(`${MASTRA_BASE_URL}/scheduled-tasks`, {
app/src/renderer/src/mastra-client.ts, line 287
const res = await fetch(`${MASTRA_BASE_URL}/scheduled-tasks/${id}`, {
app/src/renderer/src/mastra-client.ts, line 298
const res = await fetch(`${MASTRA_BASE_URL}/scheduled-tasks/${id}`, {
app/src/renderer/src/mastra-client.ts, line 307
const res = await fetch(`${MASTRA_BASE_URL}/scheduled-tasks/${id}/toggle`, {
app/src/renderer/src/mastra-client.ts, line 360
const res = await fetch(`${MASTRA_BASE_URL}/mcp-registry/servers?${params}`, { headers: authHeaders() })
Secrets
Concern
reads a credential or environment file.
SECRETS_ENV_READ SECRETS_PATH_CREDENTIAL SECRETS_PATH_DOTENV
.agents/skills/mastra/references/common-errors.md, line 447
if (!process.env.OPENAI_API_KEY) {
app/src/renderer/src/pages/SettingsPage.tsx, line 1732
initial?.env ? Object.entries(initial.env).map(([k, v]) => `${k}=${v}`).join('\n') : '',
src/mastra/agents/coworker/prompts/base.ts, line 162
Don't commit files likely to contain secrets (\`.env\`, \`*.key\`, \`credentials.json\`). Warn if asked.
Show more
src/mastra/gog/gog-manager.ts, line 20
GOG_KEYRING_PASSWORD: process.env.GOG_KEYRING_PASSWORD || '',
src/mastra/gog/gog-manager.ts, line 23
/** Path where gog expects credentials.json (mirrors os.UserConfigDir() + "gogcli"). */
src/mastra/gog/gog-manager.ts, line 24
const GOG_CREDENTIALS_PATH = join(GOG_HOME, '.config', 'gogcli', 'credentials.json');
src/mastra/gog/gog-manager.ts, line 28
* write credentials.json so gog can use them. Idempotent - skips if file exists.
src/mastra/gog/gog-manager.ts, line 32
const clientSecret = process.env.GOG_GOOGLE_CLIENT_SECRET;
src/mastra/gog/gog-manager.ts, line 44
/** Check if Google OAuth credentials are configured (env vars or credentials.json on disk). */
src/mastra/middleware/auth.ts, line 11
const token = process.env.COWORKER_API_TOKEN;
.agents/skills/mastra/references/common-errors.md, line 424
- Missing .env file
.agents/skills/mastra/references/common-errors.md, line 430
1. Create .env file:
Agent instructions
Pass
No instruction to ignore earlier instructions or to hide a step.
Obfuscation
Note
a file was over the read cap and was not fully read.
OBFUSCATION_FILE_OVER_READ_CAP
bun.lock, line 1
{
coworker.pen, line 1
{
app/bun.lock, line 1
{
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 9a631054cc36. can delete files. install fetches a script from the network. can reach a host that is not written as a fixed address. reads a credential or environment file. a file was over the read cap and was not fully read.
Date and source
Date checked:
github.com
Commit graded: 9a631054cc360e4d1db4aa05e1d3077291fb3728
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.