CtrlK
BlogDocsLog inGet started
Tessl Logo

hsts

Use when reviewing HTTP response headers on any site that serves content over HTTPS.

54

Quality

61%

Does it follow best practices?

Run evals on this skill

Adds up to 20 points to the overall score

View guide

SecuritybySnyk

Passed

No findings from the security scan

Fix and improve this skill with Tessl

tessl review fix ./skills/hsts/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Content

78%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

The body is a tight, well-organized overview: it states the exact HSTS header value, gives validation pointers, and cleanly defers full implementation detail to a single, real reference file. Its main weaknesses are minor redundancy across the Check/Fix/Explain framings and the absence of an explicit validate→fix→retry feedback loop.

DimensionReasoningScore

Conciseness

The body is lean and well-sectioned with no padded concept explanations, though the one-line SSL-stripping intro and the near-parallel Check/Fix/Explain framings restate the same guidance, leaving minor trim opportunities that keep it just below fully lean.

4 / 5

Actionability

It gives the exact, copy-paste-ready header value `Strict-Transport-Security: max-age=31536000; includeSubDomains` and names curl/securityheaders.com for validation, but server-config code lives only in the reference and no inline curl command is shown, leaving a minor gap.

4 / 5

Workflow Clarity

Check/Fix/Code Review sections supply validation cues ("validate it with curl or securityheaders.com", "verify them against the effective production-like response"), but there is no explicit sequenced feedback loop (validate → fix → re-verify), so it sits just below the top anchor.

4 / 5

Progressive Disclosure

The body is a concise overview that clearly signals one-level-deep navigation to the real `references/rule.md` for implementation details and framework-specific code, with content appropriately split between the two files.

5 / 5

Total

17

/

20

Passed

Description

45%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

The description is a clear, concise trigger clause but is essentially a "when" without a concrete "what": it never names HSTS or the actual action of setting the Strict-Transport-Security header. It risks overlapping with broader header-review skills and lacks the natural term "HSTS" users would say.

Suggestions

Add a concrete capability clause naming the action, e.g. "Sets and verifies the Strict-Transport-Security (HSTS) header on HTTPS responses."

Include the natural trigger terms users say: "HSTS", "Strict-Transport-Security", and "security headers", not just "HTTP response headers".

Keep the existing "Use when..." clause but pair it with an explicit "what" so both halves are present.

DimensionReasoningScore

Specificity

The description names the domain (HTTP response headers on HTTPS sites) but offers only the single generic action "reviewing" with no concrete capabilities; it never mentions setting or verifying an HSTS header, so it falls below the midpoint of the anchor range.

2 / 5

Completeness

It has an explicit "Use when..." trigger (the "when"), but the "what" is only weakly implied as "reviewing headers" and omits the skill's true purpose (setting the HSTS header), leaving it below the both-what-and-when anchor.

3 / 5

Trigger Term Quality

"reviewing HTTP response headers" and "site that serves content over HTTPS" are relevant, natural-ish keywords, but common variations users would actually say (HSTS, Strict-Transport-Security, security headers) are absent.

3 / 5

Distinctiveness Conflict Risk

The trigger "reviewing HTTP response headers" is somewhat specific but generic enough to overlap with sibling security-header skills (CSP, header auditing) since HSTS is never named.

3 / 5

Total

11

/

20

Passed

Validation

93%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation15 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

metadata_version

'metadata.version' is missing

Warning

Total

15

/

16

Passed

Repository
thedaviddias/Front-End-Checklist
Reviewed

Table of Contents

Is this your skill?

If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.