typescript-type-safety SKILL.md skillA
This file is byte-identical to the first copy the registry indexed, one of 3 indexed copies. Same content hash, so the same checks give both the same grade.
typescript-type-safety from theonly1me/shadowclone is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add theonly1me/shadowclone/typescript-type-safety@git:20261009.95ca1efPins git:20261009.95ca1ef in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- theonly1me/shadowclone
- Path
.claude/skills/typescript-type-safety/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261009.95ca1ef, committed Oct 9, 2026
- Size
- 3,013 bytes
- Repository stars
- 21
- License
- MIT
Use when changing TypeScript types, parsing input that enters typed code, or removing unsafe casts. Also use it when the user says "fix the types", "remove the as casts", or "make invalid states impossible". Models each valid state with types, so that invalid combinations fail to compile. Checks outside input with a type guard or a schema instead of an assertion. Not for designing module boundaries (use `design-deep-modules`).
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
# Represent State in TypeScript Types ## Use when Values change together, optional fields hide different states, outside input enters typed code, or the compiler asks for an assertion. Each of these signals a missing type or a missing check. ## Gates 1. Does each valid state have its own type, such as a member of a discriminated union? 2. Does outside input enter as `unknown`, and pass a type guard or a schema before use? 3. Is the code free of `any`, non-null assertions, and casts, except `as const`? 4. Does each switch over a union handle each member, so that a new member fails to compile? 5. Does a failure that callers must handle appear in the return type? ## Process 1. Name the valid states and the moves between them. Use a discriminated union when only some field combinations are valid. 2. Keep the relation between keys and values with generics, mapped types, or a typed setter. 3. Accept outside input as `unknown`. Check it at the boundary with a schema or a type guard. 4. Narrow values with control flow, type guards, or destructuring. Make a valid absence explicit. 5. Return a type that makes callers handle each meaningful failure. …
Read the whole file at its exact version.
How to install
mdr add theonly1me/shadowclone/typescript-type-safety@sha256:2e60ea43b640ba8bThe line at the top of this page pins the label git:20261009.95ca1ef, 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_md6rfht3mevftood)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 9, 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 (3013 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
theonly1me/shadowclone · 21 stars · license MIT · pushed 2026-10-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_md6rfht3mevftood GET https://markdownregistry.com/api/v1/resolve?ref=theonly1me/shadowclone/typescript-type-safety GET https://markdownregistry.com/api/v1/blob/2e60ea43b640ba8bc0dfbb0f8e560fd28eb37a7a76fce48a5330e3004317d7b5
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 theonly1me/shadowclone
Every file in theonly1me/shadowclone