Mastermind Grill
Before building on an unfamiliar tool, API, or library, interrogate your own understanding against its real docs/source — list your assumptions, verify each, surface the unknowns. Use for a new dependency, a tricky API, or whenever "I think it works like…" is load-bearing. Prevents confident-but-wrong builds.
Install
$ agentstack add skill-mehrad-dm-mastermind-mastermind-grill ✓ 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-mehrad-dm-mastermind-mastermind-grill) 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
MasterMind — Grill
The costly bugs come from assumptions you never checked. Grill your understanding before you commit code to it (~/.mastermind/engineering/core/rigor.md → don't bluff; ~/.mastermind/engineering/core/agent-loop.md → learn the stack first).
Method
- State your assumptions out loud — list what you believe about the API's behavior, signatures,
return values, limits, versions, edge cases. Be specific ("getFile streams any size" — true?).
- Verify each against the primary source — the official docs, the type definitions, or the actual
source. Not a blog, not memory. Confirm ✓, correct ✗, or mark unknown ❓.
- Check the version — behavior drifts; verify against the installed version, not the latest blog.
- Surface the unknowns — what you still can't confirm becomes an explicit risk or a tiny spike to
resolve (see mastermind-prototype), not a silent guess.
Rule
No load-bearing assumption ships unverified. If it can't be confirmed from the source, treat it as unknown and de-risk it — never assume it works.
Output
A short assumptions ledger (claim → verified/corrected/unknown → source), and the corrected mental model you'll build on.
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: mehrad-dm
- Source: mehrad-dm/mastermind
- License: MIT
- Homepage: https://mastermind.mehrad.me
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.