think-stocks-and-flows-reasoning SKILL.md skillA
think-stocks-and-flows-reasoning from product-on-purpose/thinking-framework-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add product-on-purpose/thinking-framework-skills/think-stocks-and-flows-reasoning@v0.1.0Pins v0.1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- product-on-purpose/thinking-framework-skills
- Path
skills/think-stocks-and-flows-reasoning/SKILL.md- Versions recorded
- 1
- Latest version
- v0.1.0, committed Jun 1, 2026
- Size
- 4,426 bytes
- Repository stars
- 25
- License
- Apache-2.0
Produces a stock-flow map by separating a quantity that accumulates from the inflows and outflows that change it, then reasoning about the stock's trajectory from the net flow rather than the direction of any single flow. Use when a problem involves an accumulation (cash, debt, backlog, headcount, customer base, technical debt, emissions) and intuition about whether it is rising or falling may be wrong.
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
<!-- thinking-framework-skills | https://github.com/product-on-purpose/thinking-framework-skills | Apache-2.0 -->
# Stocks and Flows Reasoning
People systematically misjudge accumulations. They confuse a stock (a quantity that builds up: cash, debt, a customer base, a backlog, technical debt) with the flows that change it, and infer the stock's direction from a flow's direction. The classic error: "the inflow is falling, so the stock is falling." It is not - the stock keeps rising while inflow exceeds outflow. This skill makes the structure explicit: name the stock, name its inflows and outflows separately, and reason about its trajectory from the net flow. The output is a **stock-flow map**. It corrects a specific, well-evidenced accumulation error; it does not claim to teach systems thinking wholesale.
## When to Use
- A quantity accumulates over time (runway, debt, backlog, headcount, customer base, reserves, technical debt) and the question is whether it is rising or falling.
- A trend in a flow is being used to infer the stock ("churn dropped, so the base is growing").
- Before acting on an "it's getting better/worse" intuition about an accumulation.
## When NOT to Use
…Read the whole file at its exact version.
How to install
mdr add product-on-purpose/thinking-framework-skills/think-stocks-and-flows-reasoning@sha256:d8dec5e918f0e496The line at the top of this page pins the label v0.1.0, 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_t722cesrhyhpj32d)
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Versions
The registry has recorded 1 version of this file, committed on Jun 1, 2026.
Audit of the latest version
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- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (4426 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
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- pass: No link to a raw IP address
- pass: No script tag
Source
product-on-purpose/thinking-framework-skills · 25 stars · license Apache-2.0 · pushed 2026-11-07 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_t722cesrhyhpj32d GET https://markdownregistry.com/api/v1/resolve?ref=product-on-purpose/thinking-framework-skills/think-stocks-and-flows-reasoning GET https://markdownregistry.com/api/v1/blob/d8dec5e918f0e4962e0fd2befda7aa5e678c311654004c88419e9f41d615ad1d
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.