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github-codebase-briefing

Generates a deeply contextual, progressive-disclosure briefing for any GitHub repository. It builds a mental model of the code before analyzing issues and PRs to provide actionable insights. Use when asked for a "GitHub report," "repo status," "daily briefing," or to "catch up on a codebase."

69

Quality

83%

Does it follow best practices?

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SecuritybySnyk

Low

Low-risk findings worth noting

SKILL.md
Quality
Evals
Security

Quality

Content

77%

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

The body is highly actionable with concrete gh commands and a clear sequenced workflow, scoring well on actionability and workflow clarity. It is held back by mild redundant editorializing and a monolithic structure with no progressive disclosure to reference files.

Suggestions

Tighten the intro and remove restated philosophy ('This skill performs a deep read...', 'do not just summarize the text') that duplicates the description to lift conciseness toward 3.

Move the Output Template and/or the detailed flag/analysis logic into a references/ file (e.g., TEMPLATE.md) and link to it from the body to apply progressive disclosure and reduce inline length.

Add a brief error-recovery note (e.g., what to do if 'gh auth status' fails or a rate limit is hit) to make the workflow's checkpoints fully explicit.

DimensionReasoningScore

Conciseness

The body is largely command-dense and lean, but the opening paragraph re-states the 'deep read' philosophy already conveyed in the description, and coaching such as 'do not just summarize the text. Perform a logic check:' could be tightened. Not the level-3 ideal where every token earns its place.

2 / 3

Actionability

It provides concrete, executable commands with exact JSON field lists (e.g., 'gh issue list --repo <owner/repo> --state open --json number,title,body,author,...'), 'gh pr diff <number>', and 'gh pr view <number> --json mergeable,statusCheckRollup', plus a copy-paste output template. Placeholders like <owner/repo> are the only needed substitutions.

3 / 3

Workflow Clarity

A clear numbered four-step sequence (Initialize Mental Model, Retrieve State & Delta, Deep Analysis, Pattern Synthesis) with explicit checkpoints — an auth prerequisite, a mergeability verification, and a security keyword scan. The skill is read-only, so the destructive/batch feedback-loop cap does not apply.

3 / 3

Progressive Disclosure

Content is well-sectioned rather than a wall of text, but it is monolithic: no references/, scripts/, or assets/ bundle files exist and the body references none, while the ~30-line Output Template and detailed flag logic sit inline. Over 50 lines, so the simple-skill carve-out does not apply.

2 / 3

Total

10

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12

Passed

Description

90%

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 strong: it answers both what and when with explicit, natural trigger phrases and a distinct niche. Its only weakness is specificity, where buzzwords ('deeply contextual', 'progressive-disclosure', 'actionable insights') dilute otherwise concrete capabilities.

DimensionReasoningScore

Specificity

Names the domain (GitHub repos, issues, PRs) and several actions ('builds a mental model of the code', 'analyzing issues and PRs', 'Generates...briefing'), but pads them with fluff like 'deeply contextual', 'progressive-disclosure', and 'actionable insights' rather than a clean concrete action list. Voice is third person throughout, so no specificity penalty applies.

2 / 3

Completeness

It explicitly answers both 'what' (generates a briefing by building a mental model and analyzing issues/PRs) and 'when' via an explicit 'Use when...' trigger clause, so it is not capped at 2.

3 / 3

Trigger Term Quality

The 'Use when' clause supplies four natural phrases a user would actually say — 'GitHub report', 'repo status', 'daily briefing', and 'catch up on a codebase' — giving good coverage of likely requests.

3 / 3

Distinctiveness Conflict Risk

It occupies a clear niche (GitHub repository briefing) with distinct, specific triggers, making it unlikely to fire for unrelated skills.

3 / 3

Total

11

/

12

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
google-labs-code/stitch-sdk
Reviewed

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