how SKILL.md skillA
how from lucasheriques/pstack is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add lucasheriques/pstack/how@git:20261014.8882c71Pins git:20261014.8882c71 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- lucasheriques/pstack
- Path
skills/how/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261014.8882c71, committed Oct 14, 2026
- First version recorded
- Sep 23, 2026
- Size
- 2,243 bytes
- Repository stars
- 3
- License
- MIT
Use for "how does X work", code walkthroughs before changing something, and placement / ownership / layering questions ("where should this live", "which package owns this", "is this the right layer"). Explains subsystem architecture, runtime flow, onboarding mental models. Use why for motivation.
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
# How
Explore the codebase to answer "how does X work?" questions. Produce architectural explanations at the level of a senior engineer onboarding onto a subsystem, enough to build a working mental model, not so much that it reads like annotated source code.
Every spawn uses the Agent tool with `subagent_type: "pstack:read-only"`. Explorers run on the `how explorer` model and every explainer on the `how explainer` model, both from `${CLAUDE_SKILL_DIR}/../poteto-mode/references/models.md`.
## 1. Assess complexity
If the scope is ambiguous, state your interpretation and explore. The user can redirect.
- **Simple** (a single module, a small utility, a narrow question such as "how does function X work"): no explorers. Spawn one explainer that explores and explains in one pass, built from `${CLAUDE_SKILL_DIR}/references/explainer-prompt.md` without the explorer-findings section. Go to step 4.
- **Complex** (a subsystem spanning multiple files or services, a cross-cutting feature, a full architectural overview): go to step 2.
When in doubt, take the simple path.
## 2. Explore (complex only)
…Read the whole file at its exact version.
How to install
mdr add lucasheriques/pstack/how@sha256:0cc1c67ccafe92d9The line at the top of this page pins the label git:20261014.8882c71, 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_zemicbgpzqwdu2tu)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Sep 23, 2026 and Oct 14, 2026, about one every 11 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261014.8882c71 latest | 2026-10-14 | 8882c71 | 2,243 B | A | view · diff |
| git:20260923.11fd787 | 2026-09-23 | 11fd787 | 2,722 B | A | view · diff |
| git:20260923.8a26243 | 2026-09-23 | 8a26243 | 2,718 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 (2243 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
lucasheriques/pstack · 3 stars · license MIT · pushed 2026-10-16 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_zemicbgpzqwdu2tu GET https://markdownregistry.com/api/v1/resolve?ref=lucasheriques/pstack/how GET https://markdownregistry.com/api/v1/blob/0cc1c67ccafe92d9e78668b2893ce24277f85739f8ba699092ec35e80e0acea1
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.
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