hsts SKILL.md skillA
hsts from thedaviddias/front-end-checklist is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add thedaviddias/front-end-checklist/hsts@git:20261004.4b0ddb9Pins git:20261004.4b0ddb9 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- thedaviddias/front-end-checklist
- Path
skills/hsts/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261004.4b0ddb9, committed Oct 4, 2026
- First version recorded
- May 29, 2026
- Size
- 1,986 bytes
- Repository stars
- 74,516
- License
- MIT
Use when reviewing HTTP response headers on any site that serves content over HTTPS.
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
# Set an HSTS header Without HSTS, an attacker on the same network can intercept the first HTTP request and strip TLS (SSL stripping), silently downgrading the connection before the browser ever sees a redirect. ## Quick Reference - Set `Strict-Transport-Security: max-age=31536000; includeSubDomains` on all HTTPS responses - Use `max-age=31536000` (1 year) minimum; HSTS preloading requires at least 1 year - Add `includeSubDomains` to protect all subdomains from downgrade attacks - Add `preload` only after testing — it is difficult to reverse and takes weeks to propagate - Never send the HSTS header over plain HTTP — only over HTTPS ## Check Check whether the server sends a Strict-Transport-Security header on all HTTPS responses, and verify the max-age, includeSubDomains, and preload directives are appropriate. ## Fix Add a Strict-Transport-Security header with max-age=31536000 and includeSubDomains to all HTTPS responses. Configure your web server or CDN to send this header, and validate it with curl or securityheaders.com. ## Explain …
Read the whole file at its exact version.
How to install
mdr add thedaviddias/front-end-checklist/hsts@sha256:d32a49f5a1e874ddThe line at the top of this page pins the label git:20261004.4b0ddb9, 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_e3hrseizreqr45f5)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between May 29, 2026 and Oct 4, 2026, about one every 128 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261004.4b0ddb9 latest | 2026-10-04 | 4b0ddb9 | 1,986 B | A | view · diff |
| git:20260529.7c05904 | 2026-05-29 | 7c05904 | 1,992 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 (1986 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
thedaviddias/front-end-checklist · 74,516 stars · license MIT · pushed 2026-10-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_e3hrseizreqr45f5 GET https://markdownregistry.com/api/v1/resolve?ref=thedaviddias/front-end-checklist/hsts GET https://markdownregistry.com/api/v1/blob/d32a49f5a1e874dd0ed4d674df21631eca20035e24c33470d19fd246eb1e2651
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.