content-hash-cache-pattern SKILL.md skillA
content-hash-cache-pattern from affaan-m/ecc is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add affaan-m/ecc/content-hash-cache-pattern@git:20260517.ec9ace9Pins git:20260517.ec9ace9 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- affaan-m/ecc
- Path
docs/ja-JP/skills/content-hash-cache-pattern/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260517.ec9ace9, committed May 17, 2026
- Size
- 7,090 bytes
- Repository stars
- 299,696
- License
- MIT
SHA-256コンテンツハッシュを使用して、高コストなファイル処理結果をキャッシュします — パス非依存、自動無効化、サービスレイヤーの分離。.
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
# コンテンツハッシュファイルキャッシュパターン
SHA-256コンテンツハッシュをキャッシュキーとして使用して、高コストなファイル処理結果（PDF解析、テキスト抽出、画像分析）をキャッシュします。パスベースのキャッシュとは異なり、このアプローチはファイルの移動/名前変更に対して生き残り、コンテンツが変更されたときに自動的に無効化されます。
## 起動条件
- ファイル処理パイプラインの構築（PDF、画像、テキスト抽出）
- 処理コストが高く、同じファイルが繰り返し処理される場合
- `--cache/--no-cache`CLIオプションが必要な場合
- 既存の純粋な関数を変更せずにキャッシュを追加したい場合
## コアパターン
### 1. コンテンツハッシュベースのキャッシュキー
パスではなくファイルコンテンツをキャッシュキーとして使用します：
```python
import hashlib
from pathlib import Path
_HASH_CHUNK_SIZE = 65536 # 大きなファイルには64KBチャンク
def compute_file_hash(path: Path) -> str:
"""ファイルコンテンツのSHA-256（大きなファイルにはチャンク処理）。"""
if not path.is_file():
raise FileNotFoundError(f"File not found: {path}")
sha256 = hashlib.sha256()
with open(path, "rb") as f:
while True:
chunk = f.read(_HASH_CHUNK_SIZE)
if not chunk:
break
sha256.update(chunk)
return sha256.hexdigest()
```
**なぜコンテンツハッシュ？** ファイルの名前変更/移動 = キャッシュヒット。コンテンツ変更 = 自動無効化。インデックスファイル不要。
### 2. キャッシュエントリの凍結データクラス
```python
from dataclasses import dataclass
@dataclass(frozen=True, slots=True)
class CacheEntry:
file_hash: str
source_path: str
document: ExtractedDocument # キャッシュされた結果
```
…Read the whole file at its exact version.
How to install
mdr add affaan-m/ecc/content-hash-cache-pattern@sha256:2b3ee5b2b2b36e32The line at the top of this page pins the label git:20260517.ec9ace9, 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_apfzyfeo4srbwzut)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on May 17, 2026.
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 (7090 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
affaan-m/ecc · 299,696 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_apfzyfeo4srbwzut GET https://markdownregistry.com/api/v1/resolve?ref=affaan-m/ecc/content-hash-cache-pattern GET https://markdownregistry.com/api/v1/blob/2b3ee5b2b2b36e322193822ca95bdb49d04fc48880512ed2ebfd10212a9dc4c9
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.