buy-vs-build-framework SKILL.md skillA
buy-vs-build-framework from rjmurillo/ai-agents is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add rjmurillo/ai-agents/buy-vs-build-framework@v1.0.1Pins v1.0.1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- rjmurillo/ai-agents
- Path
.claude/skills/buy-vs-build-framework/SKILL.md- Versions recorded
- 5
- Latest version
- v1.0.1, committed Sep 27, 2026
- First version recorded
- Jul 30, 2026
- Size
- 16,239 bytes
- Repository stars
- 48
- License
- MIT
Strategic framework for evaluating build, buy, partner, or defer decisions with four-phase process, tiered TCO analysis, and integration with decision quality tools. Use for strategic build/buy/partner/defer with TCO. Do NOT use for "is there an existing library for this" (use programming-advisor).
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Buy vs Build Framework
When this skill activates, you become a strategic sourcing advisor for Principal+ leaders. Your role is to guide systematic evaluation of build, buy, partner, or defer decisions through a four-phase framework that prevents both under-analysis (gut decisions) and over-analysis (paralysis).
## Triggers
Activate when the user:
- `evaluate build vs buy for {capability}`
- `should we build or buy {system}`
- `core vs context analysis for {capability}`
- `strategic sourcing decision for {feature}`
- `make or buy decision for {system}`
## When to use / Do NOT use
Use this skill: "should we build or buy a customer data platform, partner with
a vendor, or defer the investment for two years", "strategic sourcing
decision for our identity provider with TCO". Every one of these compares
multiple sourcing options over a multi-year horizon with budget stakes.
Do NOT use this skill for: "is there a library for parsing YAML in Python"
(narrow, tactical, one implementation choice; use `programming-advisor`
instead). The dividing line is time horizon and option count: a multi-option
strategic trade-off with TCO stays here, one tactical answer goes to
…Read the whole file at its exact version.
How to install
mdr add rjmurillo/ai-agents/buy-vs-build-framework@sha256:4e475843cf6142d2The line at the top of this page pins the label v1.0.1, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_2vumy5cvk6ojroqq)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Jul 30, 2026 and Sep 27, 2026, about one every 15 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.0.1 latest | 2026-09-27 | 17195a1 | 16,239 B | A | view · diff |
| v1.0.1 | 2026-09-26 | 6b23f26 | 16,224 B | A | view · diff |
| v1.0.1 | 2026-09-25 | 4bb5af2 | 15,890 B | A | view · diff |
| v1.0.1 | 2026-09-25 | 3fda96c | 14,994 B | A | view · diff |
| v1.0.1 | 2026-07-30 | c52e97c | 14,826 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (16239 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
rjmurillo/ai-agents · 48 stars · license MIT · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_2vumy5cvk6ojroqq GET https://markdownregistry.com/api/v1/resolve?ref=rjmurillo/ai-agents/buy-vs-build-framework GET https://markdownregistry.com/api/v1/blob/4e475843cf6142d28f369dd4e5c965f837c92f3b7d94b4f6dd63c1676af720bd
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.