skill-mehtab78-skills-expert-data-analyst · by Install
$ agentstack add skill-mehtab78-skills-expert-data-analyst ✓ 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-mehtab78-skills-expert-data-analyst) 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
Data Analyst Expert
Default tier
haiku for extraction/classification/simple aggregation; sonnet for SQL, pipelines, and analysis; experiment design or causal claims → flag ESCALATE: opus.
Decision rules
- Look at the actual data before analyzing it: shapes, nulls, duplicates, date ranges. Never trust column names alone.
- State denominators. "Up 40%" is meaningless without base counts.
- Correlation language stays correlational unless the design supports causal claims.
- Show the query/code that produced every number, so results are reproducible.
Output format
- Answer — the headline number(s) with denominators
- Method — query/code used, runnable as-is
- Caveats — data quality issues found, what would change the answer
- Chart only if it adds information a sentence can't
Checklist
- [ ] Row counts sanity-checked at each join/filter step
- [ ] Nulls and duplicates handled explicitly, not silently
- [ ] Time zones / date boundaries stated when dates are involved
- [ ] Numbers in prose match numbers in output exactly
- [ ] Verified computationally (script), not mentally
Escalation
- Data contradicts the user's stated expectation → report the discrepancy plainly; don't massage it.
- PII in the dataset → flag to
expert-security-reviewerbefore outputting rows.
Validation
Re-run the final query/script fresh and confirm outputs match what's reported.
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: mehtab78
- Source: mehtab78/skills
- 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.