python-development SKILL.md skillB
python-development from d-padmanabhan/agent-engineering-handbook is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add d-padmanabhan/agent-engineering-handbook/python-development@git:20260906.0766fecPins git:20260906.0766fec in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- d-padmanabhan/agent-engineering-handbook
- Path
skills/python-development/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260906.0766fec, committed Sep 6, 2026
- First version recorded
- Aug 12, 2026
- Size
- 18,326 bytes
- Repository stars
- 20
- License
- MIT
Python development standards for code review and generation. Covers Python 3.14+ patterns including template strings (t-strings), deferred annotations, free-threading, type hints, async/await, testing with pytest, package management with uv, AWS Lambda/boto3 patterns, and Pydantic validation. Use when working with .py files, pyproject.toml, requirements.txt, Lambda functions, or when asking about Python best practices, code review, or generation.
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
# Python Development
Mandatory gates are owned by the Python rule (`${HANDBOOK_ROOT}/rules/200-python.mdc`). This skill and its references own procedures and examples.
## Guiding Principle
Apply features only when they add clarity, correctness, performance, or security. Prefer simple, intentional solutions (DRY, KISS, YAGNI, Fail Fast).
## The Zen of Python (`import this`)
The canonical aphorisms by Tim Peters (PEP 20). When in doubt about which Python idiom to choose, re-read these. Quote verbatim; do not paraphrase in code reviews.
```text
The Zen of Python, by Tim Peters
Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicated.
Flat is better than nested.
Sparse is better than dense.
Readability counts.
Special cases aren't special enough to break the rules.
Although practicality beats purity.
Errors should never pass silently.
Unless explicitly silenced.
In the face of ambiguity, refuse the temptation to guess.
There should be one-- and preferably only one --obvious way to do it.
Although that way may not be obvious at first unless you're Dutch.
Now is better than never.
…Read the whole file at its exact version.
How to install
mdr add d-padmanabhan/agent-engineering-handbook/python-development@sha256:0fea08edf97605d8The line at the top of this page pins the label git:20260906.0766fec, 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_o2acls4sak6n5vtt)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Aug 12, 2026 and Sep 6, 2026, about one every 6 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260906.0766fec latest | 2026-09-06 | 0766fec | 18,326 B | B | view · diff |
| git:20260819.d23bb73 | 2026-08-19 | d23bb73 | 18,172 B | B | view · diff |
| git:20260818.880e159 | 2026-08-18 | 880e159 | 19,222 B | B | view · diff |
| git:20260812.5b4b21e | 2026-08-12 | 5b4b21e | 17,653 B | B | view · diff |
| git:20260812.4160717 | 2026-08-12 | 4160717 | 13,827 B | B | view |
Audit of the latest version
- fail: No curl or wget piped into a shell (matched: curl -LsSf https://astral.sh/uv/install.sh | sh)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (18326 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 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
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
d-padmanabhan/agent-engineering-handbook · 20 stars · license MIT · pushed 2026-10-30 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_o2acls4sak6n5vtt GET https://markdownregistry.com/api/v1/resolve?ref=d-padmanabhan/agent-engineering-handbook/python-development GET https://markdownregistry.com/api/v1/blob/0fea08edf97605d8906a3cd2b57bd9a28447935e9ffb77ae9ba8c210788a8ab6
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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