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check-impl-against-spec

warpdotdev/common-skills

5K installs78 stars

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Installation

npx skills add https://github.com/warpdotdev/common-skills --skill check-impl-against-spec

Summary

Compare a pull request's implementation against spec context in spec_context.md and feed any material mismatches into review.json. Use during PR review when approved or repository spec context is available.

SKILL.md

Check implementation against spec

Use this skill only when spec_context.md exists during PR review.

Goal

Determine whether the implementation in the checked-out PR materially matches the approved spec context. This is a supplement to the normal code review, not a separate output.

Inputs

spec_context.md contains the spec context to compare against. It may include both product spec content (intended behavior, acceptance criteria) and tech spec content (implementation details, file changes).
pr_diff.txt contains the annotated diff for the PR.
pr_description.md may contain additional scope or rationale.
The working tree contains the PR branch contents.

Process

Read spec_context.md and extract the concrete commitments it makes:

required behaviors (from the product spec)
required files or subsystems to change (from the tech spec)
stated constraints
required follow-up steps, validation, or migrations

Compare those commitments against the actual implementation in pr_diff.txt and the checked-out files.
Treat small implementation-level adjustments as acceptable when they preserve the spec's intent. Do not flag harmless differences in naming, structure, or low-level technique.
Flag a mismatch only when it is material, such as:

required behavior in the product spec is missing
the implementation contradicts a spec decision
the change introduces significant unplanned scope
a required validation, migration, or compatibility step from the tech spec is absent

Outputs

Do not create a separate report file.
Fold spec-alignment findings into review.json.
Put broad spec-drift concerns in the review summary.
Add inline comments only when the mismatch can be tied to changed lines in the diff.
Treat material spec drift as at least an important concern.
If the implementation matches the spec closely enough, do not add comments just to mention alignment.

Boundaries

Do not require literal one-to-one implementation of the spec when the PR achieves the same outcome safely.
Do not speculate about spec details that are not actually present in spec_context.md.
Do not post to GitHub directly.

Score

0–100

69/ 100

Grade

Popularity21/30

4,507 installs — solid traction.

Completeness27/30

Documented: full SKILL.md body, description, one-line install. Missing: category/license metadata.

Trust15/25

Community skill with a public GitHub source repository you can review.

Freshness6/15

No update timestamp is tracked for this skill in our catalog.

Scored automatically from popularity, completeness, trust, and freshness — computed only from data in our catalog, never fabricated.

Proud of your score? Add this badge to your README.

Paste a snippet into your GitHub README. The badge updates automatically and links back to this page.

Score badge

Markdown

[![Check Impl Against Spec skill](https://www.claudemarket.ai/skills/warpdotdev/common-skills/check-impl-against-spec/badges/score.svg)](https://www.claudemarket.ai/skills/warpdotdev/common-skills/check-impl-against-spec)

HTML

<a href="https://www.claudemarket.ai/skills/warpdotdev/common-skills/check-impl-against-spec"><img src="https://www.claudemarket.ai/skills/warpdotdev/common-skills/check-impl-against-spec/badges/score.svg" alt="Check Impl Against Spec skill"/></a>