Buy Vs Build Audit
Use when auditing a repository or subsystem for avoidable in-house implementations, unnecessary dependencies, duplicated platform features, vendor lock-in, maintenance burden, or unclear buy-vs-build ownership decisions.
Install
$ agentstack add skill-stdin-buy-vs-build-buy-vs-build-audit ✓ 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-stdin-buy-vs-build-buy-vs-build-audit) 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
Buy vs Build Audit
Audit the repository for ownership choices that deserve a second look. This is broader than a diff review: scan dependencies, common utilities, integration code, and high-maintenance subsystems.
Workflow
- Inspect dependency manifests and major source directories.
- Find custom implementations in standardized domains: dates, parsing, auth, crypto, queues, retries, validation, file formats, email, payments, observability, and search.
- Find dependencies that duplicate built-ins, native platform features, installed packages, or small clear code.
- Separate "fix now" from "watch later"; churn without payoff is not an improvement.
- Preserve safety boundaries: validation, security, privacy, accessibility, observability, and explicit requirements.
Output
Group results by action:
- Replace with reuse: custom code that should move to a built-in, platform feature, library, or service.
- Keep in-house: code that is core, small, constrained, or safer to own.
- Remove dependency: dependency that does not earn its ownership cost.
- Needs decision note: unclear tradeoffs requiring maintainer input.
For each item, include the likely rung, owner impact, and migration risk.
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: stdin
- Source: stdin/buy-vs-build
- 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.