Conciseness

The ~30-line body is lean and assumes Claude's competence with no padding or explanation of known concepts. Minor redundancy keeps it below anchor 5: the 'Check' section ('Verify password fields use type='password'...') and 'Code Review' section ('Review server config, headers, forms... Flag exact responses...') repeat the same instruction, and the intro sentence duplicates the reference file's 'Why It Matters' text.

Actionability

The guidance names exact, executable specifics — type='password', autocomplete='new-password'/'current-password', accessible toggle buttons, strength meters with requirements, and a Quick Reference checklist — and points to references/rule.md for code. Per the instruction-skill scoring note the absence of inline code is not penalized, but a couple of checks ('support password managers with proper input names') remain high-level hints, so anchor 5's copy-paste-ready specificity is not met.

Workflow Clarity

For a simple single-purpose review skill, the Check → Fix → Explain sequence is unambiguous, and 'Code Review' adds a verification step ('verify them against the effective production-like response'). It sits below anchor 5 because the Check and Code Review sections overlap without a clear division of when to use which, but there is no missing-validation concern since the operation is non-destructive.

Progressive Disclosure

The short body is well organized into Quick Reference, Check, Fix, Explain, and Code Review sections, and the single bundle file references/rule.md is real, clearly signaled at the bottom ('For full implementation details, code examples, and framework-specific guidance, see references/rule.md'), and exactly one level deep. The split of overview-in-body versus details-and-code-in-reference matches anchor 5's structure.

Specificity

Names the domain ('Secure password input fields') with two concrete actions — 'reviewing headers, forms, cookies, or third-party integrations' and 'Validate the effective browser and HTTP behavior' — but coverage is not comprehensive (no mention of specific checks like autocomplete values, toggles, or strength meters). Fits anchor 3 ('1-2 concrete actions, but not comprehensive') better than anchor 4, whose example lists three-plus distinct actions.

Completeness

Both parts are present: the 'what' ('Validate the effective browser and HTTP behavior in a production-like environment') and an explicit 'when' ('Use when reviewing headers, forms, cookies, or third-party integrations related to Secure password input fields'). The 'what' is somewhat abstract about what the skill actually delivers (checks/fixes for password fields), keeping it below anchor 5's fully concrete what-and-when; the explicit 'Use when' clause keeps it above anchor 3.

Trigger Term Quality

Good natural keyword coverage: 'headers, forms, cookies, third-party integrations', 'password input fields', 'browser', 'HTTP', 'production-like environment' are phrases users would naturally say. A few common variations are missing ('login form', 'sign-up', 'autocomplete', 'password manager'), so it does not reach anchor 5's comprehensive synonym coverage.

Distinctiveness Conflict Risk

The password-field niche is distinct, but the broad trigger terms 'headers, forms, cookies, or third-party integrations' overlap with sibling web-security review skills (e.g., other frontend checklist rules covering forms, cookies, or headers), so minor overlap risk remains rather than anchor 5's minimal-conflict niche.