fetcher-storage SKILL.md skillA
fetcher-storage 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/fetcher-storage@git:20261004.2702e5dPins git:20261004.2702e5d 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/fetcher/skills/fetcher-storage/SKILL.md- Versions recorded
- 7
- Latest version
- git:20261004.2702e5d, committed Oct 4, 2026
- First version recorded
- May 27, 2026
- Size
- 3,752 bytes
- Repository stars
- 2
- License
- Apache-2.0
Persist one typed value per key with `@ahoo-wang/fetcher-storage`: `KeyStorage` (defaults, serializers, change listeners, caching), `InMemoryStorage` for tests and SSR, and cross-tab sync through a broadcast bus. Use to remember a setting, token or draft in localStorage, or to keep such a stored value (a theme, say) in sync across tabs. For notifications with nothing stored use fetcher-eventbus.
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
# fetcher-storage
## Decisions
- **Backend**: `KeyStorage` uses `getStorage()` by default — `localStorage` when `window` exists, otherwise a fresh, unshared `InMemoryStorage` per call. It does **not** fall back when `localStorage` exists but is blocked. Pass `storage: new InMemoryStorage()` in tests and SSR for determinism.
- **Serializer**: the default is `jsonSerializer`; leave it unless values need a custom format (`Serializer<string, T>`). `typedIdentitySerializer<T>()` only makes sense for `KeyStorage<string>`, since `Storage` holds strings.
- **Cross-tab sync is opt-in**: the default `eventBus` is a local `SerialTypedEventBus('KeyStorage:{key}')`. Pass `eventBus: new BroadcastTypedEventBus({ delegate: new SerialTypedEventBus('app:theme') })` to sync; native `window` `storage` events are never used. One broadcast bus serves one key (and one serializer instance); reusing it for another key throws.
- **One instance per key**: share a single `KeyStorage` (export it from a module). Instances only see each other's writes through a shared `eventBus`.
## Gotchas a capable model gets wrong
…Read the whole file at its exact version.
How to install
mdr add ahoo-wang/skills/fetcher-storage@sha256:16514167d1ede86bThe line at the top of this page pins the label git:20261004.2702e5d, 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_4mbjghkncoqqmild)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 7 versions of this file, between May 27, 2026 and Oct 4, 2026, about one every 22 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261004.2702e5d latest | 2026-10-04 | 2702e5d | 3,752 B | A | view · diff |
| git:20260925.dadfae9 | 2026-09-25 | dadfae9 | 3,086 B | A | view · diff |
| git:20260924.b36c6c8 | 2026-09-24 | b36c6c8 | 2,920 B | A | view · diff |
| git:20260818.2ff7b22 | 2026-08-18 | 2ff7b22 | 1,627 B | A | view · diff |
| git:20260816.892f6cd | 2026-08-16 | 892f6cd | 1,876 B | A | view · diff |
| git:20260804.1ce42d6 | 2026-08-04 | 1ce42d6 | 1,855 B | A | view · diff |
| git:20260527.808710c | 2026-05-27 | 808710c | 1,879 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 (3752 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_4mbjghkncoqqmild GET https://markdownregistry.com/api/v1/resolve?ref=ahoo-wang/skills/fetcher-storage GET https://markdownregistry.com/api/v1/blob/16514167d1ede86b0396ebd53df356fa70683b787739e3b9c29b96e22005fbb1
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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