Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add pproenca/dot-skills --skill pythongit clone --depth 1 https://github.com/pproenca/dot-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/pproenca/dot-skills/python)<a href="https://agentmods.dev/skills/pproenca/dot-skills/python"><img src="https://agentmods.dev/badge/skills/pproenca/dot-skills/python/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/pproenca/dot-skills/python"><img src="https://agentmods.dev/badge/skills/pproenca/dot-skills/python.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00062 | $0.02290 |
| Opus 5.5 | $0.00025 | $0.00916 |
| Sonnet 5.5 | $0.00012 | $0.00458 |
| Haiku 4.5 | $0.00006 | $0.00229 |
Grade A, and why
python scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 104 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Python 3.11 Best Practices
Comprehensive performance optimization guide for Python 3.11+ applications. Contains 42 rules across 8 categories, prioritized by impact to guide automated refactoring and code generation.
When to Apply
Reference these guidelines when:
- Writing new Python async I/O code
- Choosing data structures for collections
- Optimizing memory usage in data-intensive applications
- Implementing concurrent or parallel processing
- Reviewing Python code for performance issues
Rule Categories by Priority
| Priority | Category | Impact | Prefix |
|---|---|---|---|
| 1 | I/O & Async Patterns | CRITICAL | io- |
| 2 | Data Structure Selection | CRITICAL | ds- |
| 3 | Memory Optimization | HIGH | mem- |
| 4 | Concurrency & Parallelism | HIGH | conc- |
| 5 | Loop & Iteration | MEDIUM | loop- |
| 6 | String Operations | MEDIUM | str- |
| 7 | Function & Call Overhead | LOW-MEDIUM | func- |
| 8 | Python Idioms & Micro | LOW | py- |
Table of Contents
-
I/O & Async Patterns — CRITICAL
- 1.1 Defer await Until Value Needed — CRITICAL (2-5× faster for dependent operations)
- 1.2 Use aiofiles for Async File Operations — CRITICAL (prevents event loop blocking)
- 1.3 Use asyncio.gather() for Concurrent I/O — CRITICAL (2-10× throughput improvement)
- 1.4 Use Connection Pooling for Database Access — CRITICAL (100-200ms saved per connection)
- 1.5 Use Semaphores to Limit Concurrent Operations — CRITICAL (prevents resource exhaustion)
- 1.6 Use uvloop for Faster Event Loop — CRITICAL (2-4× faster async I/O)
-
Data Structure Selection — CRITICAL
- 2.1 Use bisect for O(log n) Sorted List Operations — CRITICAL (O(n) to O(log n) search)
- 2.2 Use defaultdict to Avoid Key Existence Checks — CRITICAL (eliminates redundant lookups)
- 2.3 Use deque for O(1) Queue Operations — CRITICAL (O(n) to O(1) for popleft)
- 2.4 Use Dict for O(1) Key-Value Lookup — CRITICAL (O(n) to O(1) lookup)
- 2.5 Use frozenset for Hashable Set Keys — CRITICAL (enables set-of-sets patterns)
- 2.6 Use Set for O(1) Membership Testing — CRITICAL (O(n) to O(1) lookup)
What ships with it
46 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- AGENTS.md 192 B
- assets/templates/_template.md 1.0 KB
- metadata.json 1.2 KB
- references/_sections.md 1.8 KB
- references/conc-asyncio-for-io.md 1.4 KB
- references/conc-multiprocessing-cpu.md 1.8 KB
- references/conc-queue-communication.md 1.7 KB
- references/conc-taskgroup.md 1.7 KB
- references/conc-threadpool-blocking.md 1.6 KB
- references/ds-bisect-sorted.md 1.4 KB
- references/ds-defaultdict.md 1.5 KB
- references/ds-deque-for-queue.md 1.3 KB
- references/ds-dict-for-lookup.md 1.3 KB
- references/ds-frozenset-for-hashable.md 1.4 KB
- references/ds-set-for-membership.md 1.4 KB
- references/func-keyword-only.md 1.5 KB
- references/func-lru-cache.md 1.6 KB
- references/func-partial.md 1.6 KB
- references/func-reduce-calls.md 1.3 KB
- references/io-aiofiles.md 1.5 KB
- references/io-async-gather.md 1.5 KB
- references/io-connection-pooling.md 1.7 KB
- references/io-defer-await.md 1.6 KB
- references/io-semaphore.md 1.9 KB
- references/io-uvloop.md 1.3 KB
- references/loop-any-all.md 1.4 KB
- references/loop-comprehension.md 1.4 KB
- references/loop-dict-items.md 1.2 KB
- references/loop-enumerate.md 1.4 KB
- references/loop-hoist-invariants.md 1.7 KB
- references/loop-itertools.md 1.4 KB
- references/mem-array-for-numeric.md 1.3 KB
- references/mem-generators.md 1.6 KB
- references/mem-intern-strings.md 1.7 KB
- references/mem-slots.md 1.3 KB
- references/mem-weak-references.md 1.6 KB
- references/py-dataclass.md 1.5 KB
- references/py-lazy-import.md 1.6 KB
- references/py-local-variables.md 1.4 KB
- references/py-match-statement.md 1.9 KB
- references/py-walrus-operator.md 1.3 KB
- references/py-zero-cost-exceptions.md 1.6 KB
- references/str-fstring.md 1.3 KB
- references/str-join-concatenation.md 1.2 KB
- references/str-startswith-tuple.md 1.2 KB
- references/str-translate.md 1.6 KB
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 104 lines · 62 tokens per session scan A 3edd3aec6633
python is a skill published in the GitHub repository pproenca/dot-skills (215 stars, last pushed 2mo ago), licensed MIT. It adds 62 tokens to every session and 2,290 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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