common-sense-index-investing-bogle SKILL.md skillA
common-sense-index-investing-bogle from simbajigege/book2skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add simbajigege/book2skills/common-sense-index-investing-bogle@git:20260430.ba4df11Pins git:20260430.ba4df11 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- simbajigege/book2skills
- Path
skills/common-sense-index-investing-bogle/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260430.ba4df11, committed Apr 30, 2026
- First version recorded
- Mar 25, 2026
- Size
- 9,232 bytes
- Repository stars
- 202
- License
- MIT
Apply John Bogle index investing rules for low-cost funds, asset allocation,.
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
# The Little Book of Common Sense Investing — Index Investing Skill **Knowledge source:** *The Little Book of Common Sense Investing* by John C. Bogle. ## Overview Use this skill to evaluate investment fund choices, portfolio simplicity, cost drag, index fund discipline, asset allocation, and buy-hold behavior using Bogle's common-sense investing framework. It is educational decision support, not personalized financial advice. ## When to Use This Skill Use this skill when the user asks: - "Should I use an index fund or active fund?" - "Are these fund fees too high?" - "How should I think about ETFs, smart beta, or advisers?" - "What stock/bond allocation is sensible?" - "Am I overcomplicating my portfolio?" ## Core Principle Own the broad market at very low cost and hold it for the long term. Before costs, investors collectively earn the market return; after costs, the more they pay intermediaries, trade, and chase winners, the less they keep. ## Workflow Inventory | Workflow | User question pattern | Inputs | Steps | Output | Independent trigger? | Distinct references? | Triage score | Should be subskill? | Reason | |---|---|---|---|---|---|---:|---:|---|---| …
Read the whole file at its exact version.
How to install
mdr add simbajigege/book2skills/common-sense-index-investing-bogle@sha256:6058c37e29bb0edeThe line at the top of this page pins the label git:20260430.ba4df11, 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_aagptznomkmro7ju)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Mar 25, 2026 and Apr 30, 2026, about one every 36 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260430.ba4df11 latest | 2026-04-30 | ba4df11 | 9,232 B | A | view · diff |
| git:20260325.df41134 | 2026-03-25 | df41134 | 15,691 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 (9232 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
simbajigege/book2skills · 202 stars · license MIT · pushed 2026-08-26 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_aagptznomkmro7ju GET https://markdownregistry.com/api/v1/resolve?ref=simbajigege/book2skills/common-sense-index-investing-bogle GET https://markdownregistry.com/api/v1/blob/6058c37e29bb0ede1fc2fcfef8386a64c0378fdbb8fad46ffed9118c03228af6
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.