python-memory-safe-scripts SKILL.md skillA
python-memory-safe-scripts from terrylica/cc-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add terrylica/cc-skills/python-memory-safe-scripts@git:20260401.b664eafPins git:20260401.b664eaf in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- terrylica/cc-skills
- Path
plugins/devops-tools/skills/python-memory-safe-scripts/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260401.b664eaf, committed Apr 1, 2026
- First version recorded
- Mar 24, 2026
- Size
- 11,858 bytes
- Repository stars
- 2
- License
- MIT
Memory-safe Python script patterns for long-running processes under systemd MemoryMax constraints. Covers allocator purge (mimalloc/glibc malloc_trim), HTTP response lifecycle, DataFrame cleanup, thread-local connection reuse, and periodic GC cadence. Battle-tested through 5 OOM optimization cycles on production GPU workstations. Use this skill proactively whenever writing or reviewing Python scripts that: run under systemd with MemoryMax, process data in loops (downloads, ETL, backfill), use…
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
# Memory-Safe Python Script Patterns Battle-tested patterns for keeping Python scripts alive under systemd `MemoryMax` constraints. Extracted from `repair_direct_parquet.py` (24-worker parallel repair) and `exness_tick_cache_seeder.py` (10-symbol daily seeder) after 5 OOM optimization cycles on a 62 GB GPU workstation. **Core insight**: Python's garbage collector frees objects, but the C allocator (glibc ptmalloc2) does NOT return freed pages to the OS. Without explicit `malloc_trim(0)`, RSS only grows — even after `del` and `gc.collect()`. mimalloc with `MIMALLOC_PURGE_DELAY` helps but explicit purge is faster. > **Self-Evolving Skill**: This skill improves through use. If instructions are wrong, parameters drifted, or a workaround was needed — fix this file immediately, don't defer. Only update for real, reproducible issues. ## The 7 Patterns ### 1. Cached Allocator Purge The most important pattern. Cache the ctypes library handle on first call so subsequent purges are a single FFI invocation with zero allocation overhead. ```python import ctypes import gc import sys _purge_lib = None _purge_method = None # "mimalloc" | "glibc" | "none" def _force_allocator_purge(): …
Read the whole file at its exact version.
How to install
mdr add terrylica/cc-skills/python-memory-safe-scripts@sha256:72317a0b541c88fcThe line at the top of this page pins the label git:20260401.b664eaf, 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_plsivvsmsviepqhl)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Mar 24, 2026 and Apr 1, 2026, about one every 4 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260401.b664eaf latest | 2026-04-01 | b664eaf | 11,858 B | A | view · diff |
| git:20260401.6be22af | 2026-04-01 | 6be22af | 11,636 B | A | view · diff |
| git:20260324.e205bec | 2026-03-24 | e205bec | 11,066 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 (11858 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
terrylica/cc-skills · 2 stars · license MIT · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_plsivvsmsviepqhl GET https://markdownregistry.com/api/v1/resolve?ref=terrylica/cc-skills/python-memory-safe-scripts GET https://markdownregistry.com/api/v1/blob/72317a0b541c88fc66a0883b223ee68287e1a2db5b25e39cec45a5dcd96c5aa2
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.