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rust-backend

Rust coding guidelines for the Windmill backend. MUST use when writing or modifying Rust code in the backend directory.

61

Quality

71%

Does it follow best practices?

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SecuritybySnyk

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tessl review fix ./.agents/skills/rust-backend/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Content

80%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 exceptionally lean and actionable, with concrete Windmill-specific Rust patterns and executable examples. Its weak spots are the absence of a sequenced workflow with validation checkpoints and lack of progressive file structure.

Suggestions

For any multi-step or destructive operations (e.g., SQL migrations, batch deletes), add an explicit validate-then-proceed sequence with a feedback loop to lift workflow clarity.

Move the bulkier reference material (e.g., full serde attribute catalog or telemetry allowlist details) into a references/ file referenced one level deep from SKILL.md to improve progressive disclosure.

DimensionReasoningScore

Conciseness

Lean and prescriptive throughout: assumes Rust competence, explains only Windmill-specific rationale (e.g., worker version lag for SELECT *), and every code block earns its place.

5 / 5

Actionability

Provides copy-paste-ready Rust snippets with explicit rules (never SELECT *, prefer Box<RawValue>, std::sync::Mutex over tokio unless awaiting), covering the common backend cases.

5 / 5

Workflow Clarity

This is a topical patterns document rather than a multi-step workflow, so there is no sequenced process with validation checkpoints; sections are organized by topic but lack explicit checkpoints or feedback loops.

3 / 5

Progressive Disclosure

Well-sectioned but entirely inlined (~110 lines) with no bundle files present; the only external reference (docs/feature-telemetry.md) is not part of the skill bundle and is not clearly signaled as one-level-deep navigation.

3 / 5

Total

16

/

20

Passed

Description

62%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 clearly states both purpose and trigger scope, and is well-scoped to the Windmill backend, reducing conflict risk. Its main weakness is generic capability language and limited variety of natural trigger terms.

Suggestions

Replace generic 'Rust coding guidelines' with one or two concrete capabilities (e.g., 'Enforces Windmill error-handling, SQLx query, and async-runtime patterns') to lift specificity.

Broaden trigger terms with synonyms users would naturally say, such as 'Rust code', '.rs files', 'backend crate', or 'windmill-api' to improve natural keyword coverage.

DimensionReasoningScore

Specificity

Names the domain ('Rust coding guidelines for the Windmill backend') and one to two actions ('writing or modifying Rust code'), but 'coding guidelines' is generic and no specific actions are enumerated.

3 / 5

Completeness

Provides a clear 'what' (Windmill backend Rust guidelines) and an explicit 'when' ('MUST use when writing or modifying Rust code in the backend directory'), though the trigger phrases could be more varied.

4 / 5

Trigger Term Quality

Includes some natural terms ('writing or modifying Rust code', 'backend directory') but lacks common synonyms or file extensions, and leans on a capitalized 'MUST use when' rather than varied natural phrasing.

3 / 5

Distinctiveness Conflict Risk

Scoped tightly to 'Windmill backend' Rust code, giving it a clear niche with minor overlap risk; not as comprehensive on triggers as the 5 anchor.

4 / 5

Total

14

/

20

Passed

Validation

100%

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

Validation16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository
windmill-labs/windmill
Reviewed

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