AI markdown: `Bash(chgrp:*)` tool grant

AI-native markdown frontmatter grants `Bash(chgrp:*)` authority

Activation Model

Preset Membership

This rule is part of the builtin activation graph through these preset memberships.

previewmembership

skillsmembership

Lifecycle

State

stable_gated

Graduation rationale

Checks AI-native frontmatter for explicit wildcard chgrp grants in shared allowed-tools policy.

Deterministic signal basis

MarkdownSignals exact frontmatter token detection for `Bash(chgrp:*)` inside allowed-tools or allowed_tools.

Malicious corpus

skill-chgrp-allowed-tools

Benign corpus

skill-chgrp-allowed-tools-specific-safe

structured evidence required remediation reviewed

Canonical note

Structural stable rule intended as a high-precision check with deterministic evidence.

Nearby Signals

SEC352AI markdown: unscoped Bash tool grantAI-native markdown frontmatter grants unscoped Bash tool accessmarkdownstable

SEC417AI markdown: unpinned pip git installAI-native markdown installs Python packages from an unpinned `git+https://` sourcemarkdownstable

SEC428AI markdown: unsafe Read path grantAI-native markdown frontmatter grants `Read(...)` over an unsafe repo-external pathmarkdownstable

SEC429AI markdown: unsafe Write path grantAI-native markdown frontmatter grants `Write(...)` over an unsafe repo-external pathmarkdownstable

SEC430AI markdown: unsafe Edit path grantAI-native markdown frontmatter grants `Edit(...)` over an unsafe repo-external pathmarkdownstable

SEC431AI markdown: unsafe Glob path grantAI-native markdown frontmatter grants `Glob(...)` over an unsafe repo-external pathmarkdownstable

SEC469 / MD-CHGRP-ALLOWED-TOOLS flags AI-native markdown frontmatter that grants blanket chgrp authority through allowed-tools.

Why this matters:

Bash(chgrp:*) gives broad group-changing authority as a default shared capability
the grant is wider than a reviewed ownership-update workflow
shared instructions should prefer a narrow scoped command instead of open-ended group changes

Triggers:

yaml

allowed-tools: Bash(chgrp:*)

Does not trigger:

yaml

allowed-tools: Bash(chgrp staff ./bin/tool)

Remediation:

replace Bash(chgrp:*) with a narrower reviewed group-change command or remove the grant entirely