cratis-lens-browser-extension SKILL.md skillA
cratis-lens-browser-extension from cratis/ai is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add cratis/ai/cratis-lens-browser-extension@git:20261014.e378299Pins git:20261014.e378299 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- cratis/ai
- Path
.cratis/ai/skills/cratis-lens-browser-extension/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261014.e378299, committed Oct 14, 2026
- First version recorded
- Oct 12, 2026
- Size
- 14,618 bytes
- Repository stars
- 4
- License
- MIT
Use the Cratis Lens browser extension against a running Cratis Arc application — building and side-loading it, what the Arc app must already serve for Lens to work, switching the active user and tenant, and executing a command or query from the popup. Use when setting Lens up, when Lens does not detect an Arc app, or when a switched identity or tenant does not take effect. Do not use for production authentication or authorization design, and do not use for Chronicle inspection.
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
# Use Lens against a running Arc application Lens is a Manifest V3 browser extension that impersonates a user and a tenant against an Arc application you are developing, and executes that application's commands and queries from a popup. It changes nothing in the application: it rewrites request headers at the network boundary and reads Arc's own introspection endpoints. ⚠️ Lens is a **development** tool that can present any identity to any origin the developer points it at. Nothing in it is production tooling. ## Verified product sources | Source | Purpose | | --- | --- | | `Cratis/Lens` `Source/` | The extension itself; no newer release | | `Cratis.Arc.Core` | The `/.cratis/*` endpoints, the forwarded-identity contract, and the tenancy header Lens depends on | Arc evidence: [ArcOptions.cs](https://github.com/Cratis/Arc/blob/main/Source/DotNET/Arc.Core/ArcOptions.cs), [MicrosoftIdentityPlatformAuthenticationHandler.cs](https://github.com/Cratis/Arc/blob/main/Source/DotNET/Arc.Core/Identity/MicrosoftIdentityPlatformAuthenticationHandler.cs), [IntrospectionOptions.cs](https://github.com/Cratis/Arc/blob/main/Source/DotNET/Arc.Core/Introspection/IntrospectionOptions.cs) …
Read the whole file at its exact version.
How to install
mdr add cratis/ai/cratis-lens-browser-extension@sha256:019d0a86296f589fThe line at the top of this page pins the label git:20261014.e378299, 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_olx5hpb3lanwt3mi)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Oct 12, 2026 and Oct 14, 2026, more than one a day.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261014.e378299 latest | 2026-10-14 | e378299 | 14,618 B | A | view · diff |
| git:20261013.615e6a9 | 2026-10-13 | 615e6a9 | 14,482 B | A | view · diff |
| git:20261012.24c79a0 | 2026-10-12 | 24c79a0 | 14,914 B | A | view · diff |
| git:20261012.1578108 | 2026-10-12 | 1578108 | 13,392 B | A | view · diff |
| git:20261012.61560be | 2026-10-12 | 61560be | 14,272 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 (14618 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
cratis/ai · 4 stars · license MIT · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_olx5hpb3lanwt3mi GET https://markdownregistry.com/api/v1/resolve?ref=cratis/ai/cratis-lens-browser-extension GET https://markdownregistry.com/api/v1/blob/019d0a86296f589f99ed0dad4238d74c0a303fb7941dd86cb276bc96af6f751f
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.