System File Guardrails
Safety checks for editing system files — commands in .opencode/command/, skills in .opencode/skills/, agents in .opencode/agent/, or AGENTS.md itself. Load when creating or modifying any of these files.
Install
$ agentstack add skill-rianvdm-product-ai-public-system-file-guardrails ✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.
Security review
✓ PassedNo issues found. Passed automated security review. · v0.1.0 How review works →
- ✓ Prompt-injection patterns
- ✓ Secret / credential exfiltration
- ✓ Dangerous shell & filesystem operations
- ✓ Untrusted network calls
- ✓ Known-malicious package signatures
What it can access
- ✓ Network access No
- ✓ Filesystem access No
- ✓ Shell / process execution No
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
Verified badge
Passed review? Show it. Paste this badge into your README, it links to the public security report.
Links to your public security report.[](https://agentstack.voostack.com/security/report/skill-rianvdm-product-ai-public-system-file-guardrails) Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →About
System File Edit Guardrails
Follow these checks when editing system files: commands (.opencode/command/), skills (.opencode/skills/), agents (.opencode/agent/), or AGENTS.md itself.
Before Editing
| Check | What to verify | |-------|---------------| | Inbound references | Search for the file's name across .opencode/command/, .opencode/skills/, .opencode/agent/, and AGENTS.md. Note files whose assumptions could break if this file changes. | | Outbound references | What skills, agents, or commands does this file reference? Verify each exists on disk. |
If broken outbound references are found, warn before proceeding (the edit might be fixing them).
After Editing a Command
| Check | What to verify | |-------|---------------| | Frontmatter | description present | | $ARGUMENTS | Parsed and handled (if command accepts arguments) | | Skill loading | Lazy — no loading during research phases | | Token efficiency | Compact tables over prose. Nothing duplicated from AGENTS.md | | MCP tool references | Correct tool names, fallback behavior if tools are unavailable |
After Editing a Skill or Agent
| Check | What to verify | |-------|---------------| | Frontmatter | name, description present. Agents: mode, tools also present | | Description accuracy | Frontmatter description matches what the file actually does | | Stale references | No references to commands, tools, files, or skills that don't exist | | Agent quality checklist | Present and covers the agent's actual scope |
Post-Session Coherence
When 2+ system files are modified in a session, offer a coherence check before wrapping up:
> "You modified N system files this session — running a quick coherence check."
| Check | What to verify | |-------|---------------| | Cross-references | Do modified files' references to other files still resolve? | | Scope alignment | If a convention spans multiple files, do they use consistent language? | | Displaced content | Were any existing sections accidentally removed or overwritten? |
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: rianvdm
- Source: rianvdm/product-ai-public
- License: MIT
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.