cosid-sharding SKILL.md skillA
This file is byte-identical to the first copy the registry indexed. Same content hash, so the same checks give both the same grade.
cosid-sharding from ahoo-wang/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ahoo-wang/skills/cosid-sharding@git:20261027.4a2e10fPins git:20261027.4a2e10f in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ahoo-wang/skills
- Path
sources/CosId/skills/cosid-sharding/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261027.4a2e10f, committed Oct 27, 2026
- First version recorded
- May 27, 2026
- Size
- 6,680 bytes
- Repository stars
- 2
- License
- Apache-2.0
Design, implement, and validate database sharding with the cosid-sharding module (ModCycle, IntervalTimeline, CachedSharding, ShardingRange, StandardLocalDateTimeConvertor, SnowflakeLocalDateTimeConvertor on a Layout) or ShardingSphere's COSID_MOD, COSID_INTERVAL and COSID_INTERVAL_SNOWFLAKE algorithms. Use for modulo routing, date/time partitions, Snowflake timestamp routing, exact/IN/range behavior, effective nodes, suffix naming, or routing tests. Do not use for choosing an ID generator…
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
# Design CosId Sharding Treat the core Java sharding API and ShardingSphere configuration as separate integration surfaces. The algorithms live in `me.ahoo.cosid:cosid-sharding` (package `me.ahoo.cosid.sharding`), released with CosId and depending on `cosid-core` only (D7). In CosId 5 a range is a `ShardingRange` (Guava's `Range` is gone; the factory names are the same), and the Snowflake convertor takes a `Layout`. Verify the target CosId and ShardingSphere versions before copying property names. ## Workflow 1. Identify the sharding key type and every query operator that must route: exact, `IN`, and range. 2. Define physical nodes, naming, bounds, and future partition provisioning before selecting an algorithm. 3. Choose `ModCycle` for fixed-count numeric distribution or `IntervalTimeline` for time partitions. 4. Add Snowflake conversion only when the id `Layout` (epoch, unit, bits) is known. 5. Build a routing matrix that covers boundaries, out-of-range values, and full-range queries. ## Core Algorithms | API | Use | Important behavior | |---|---|---| …
Read the whole file at its exact version.
How to install
mdr add ahoo-wang/skills/cosid-sharding@sha256:144167c08e09e6beThe line at the top of this page pins the label git:20261027.4a2e10f, 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_uoimrvmyk3q5mzub)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between May 27, 2026 and Oct 27, 2026, about one every 38 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261027.4a2e10f latest | 2026-10-27 | 4a2e10f | 6,680 B | A | view · diff |
| git:20261012.e4b9d00 | 2026-10-12 | e4b9d00 | 6,120 B | A | view · diff |
| git:20260818.2ff7b22 | 2026-08-18 | 2ff7b22 | 5,920 B | A | view · diff |
| git:20260817.88affa1 | 2026-08-17 | 88affa1 | 10,051 B | A | view · diff |
| git:20260527.808710c | 2026-05-27 | 808710c | 9,204 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 (6680 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
ahoo-wang/skills · 2 stars · license Apache-2.0 · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_uoimrvmyk3q5mzub GET https://markdownregistry.com/api/v1/resolve?ref=ahoo-wang/skills/cosid-sharding GET https://markdownregistry.com/api/v1/blob/144167c08e09e6beb1bc60d4fab9dd709d697ceae787347df3c7595ee9323a4b
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.
More from ahoo-wang/skills
Every file in ahoo-wang/skills