thread-delay SKILL.md skillA

thread-delay from ncaq/konoka is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add ncaq/konoka/thread-delay@git:20260530.1fba2fa

Pins git:20260530.1fba2fa in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
ncaq/konoka
Path
plugins/haskell-tasuke/skills/thread-delay/SKILL.md
Versions recorded
2
Latest version
git:20260530.1fba2fa, committed May 30, 2026
First version recorded
May 21, 2026
Size
3,234 bytes
Repository stars
3
License
Apache-2.0

Avoid overusing threadDelay because time-dependent code is unstable and unportable. Prefer synchronization variables like TMVar or retry combinators. Use when writing or reviewing Haskell code that delays threads, waits, or polls.

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

# `threadDelay`

## 乱用を避ける

`threadDelay`はスレッドを指定した時間だけ遅延させる関数です。

`threadDelay`を乱用するのはやめましょう。

時間に依存するコードは安定性や移植性が低いためです。

次の実行でも同じ時間で処理が完了するとは限りません。
他のマシンでは同じ時間で処理が完了しないかもしれません。

また必然的にその時間だけ実行がストップしてしまうので、
待つように命令した分だけ実行が遅くなります。

## 代替手段

### 同期変数

`TMVar`などの同期変数が使える場合は正確に同期できます。

Haskellの別のスレッドの実行を待つ場合などに使えます。

### リトライ

言語外部のデータやイベントに依存する場合は、
[retry: Retry combinators for monadic actions that may fail](https://hackage.haskell.org/package/retry)
パッケージなどを使って細かくリトライしてください。

短い単位の繰り返しからだんだん待機時間を増やしていくことで、
固定の待機をするよりは実行のストップが短くなることが見込めます。
また最大待機時間の値を固定値より大きくすることが許容できるため、
実行の安定も見込めます。

リトライポリシーとしては、
ネットワークを経由する場合は、
基本的に`fullJitterBackoff`を使うのが望ましいでしょう。
待機時間を増やしていきますし、
乱数を入れることで複数の端末が衝突することをある程度避けることが出来ます。

`MonadIO`の文脈を入れたくないとか、
もう少しシンプルでもいいなら、
`exponentialBackoff`も選択肢になります。

固定でなければ不都合がある場合は`constantDelay`を使うべきです。

全体の待機可能な時間は`limitRetriesByCumulativeDelay`で制限してください。

## 永久的な停止の意図

以下のように意図的に永久的にスレッドを停止する場合は問題ありません。

```haskell
forever $ threadDelay maxBound
```

そのスレッドが持つリソースを、
GCに回収されないように保持するために、
こういった永久的なsleepが必要な時もあります。

## テストコードでの利用

テストコードを書く時に、
ロジックに実行を待つ部分が実装されていない場合などは、
同期変数を組み込むとロジックを複雑にしてしまうことがあるので仕方ない時もあります。

テストコードなら壊れても致命的ではないので許容することもありますが、
やはり他の方法を使えないか検討するべきです。
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add ncaq/konoka/thread-delay@sha256:2583d96f6891bbf7

The line at the top of this page pins the label git:20260530.1fba2fa, 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.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_prp4lm7n5vx4klsz.svg)](https://markdownregistry.com/a/art_prp4lm7n5vx4klsz)

2 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 2 versions of this file, between May 21, 2026 and May 30, 2026, about one every 9 days.

versioncommittedcommitsizeaudit
git:20260530.1fba2fa latest2026-05-30 1fba2fa 3,234 BA view · diff
git:20260521.2b47e162026-05-21 2b47e16 2,502 BA view

Audit of the latest version

A  17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (3234 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

GitHub

ncaq/konoka · 3 stars · license Apache-2.0 · pushed 2026-10-19 · branch master

API

GET https://markdownregistry.com/api/v1/artifacts/art_prp4lm7n5vx4klsz
GET https://markdownregistry.com/api/v1/resolve?ref=ncaq/konoka/thread-delay
GET https://markdownregistry.com/api/v1/blob/2583d96f6891bbf7a3714d0890e471ccc4fafbc2dca96f5cf2c12d7a8b4250da

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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