Conciseness

The body is efficient and assumes competence — option tables and command examples carry the weight with no conceptual padding — but there is minor redundancy: defaults are stated twice ("Model preference (optional, defaults to gemini-3.1-flash-image-preview)" vs Best Practices #6, and "Resolution (optional, defaults to 1K)" vs Best Practices #5). This matches the 'efficient with minor instances that could be trimmed' anchor rather than the 'every token earns its place' anchor of 5.

Actionability

All guidance is copy-paste-ready: executable `python3 ${CLAUDE_SKILL_DIR}/nanobanana.py` invocations with every flag shown (`--prompt`, `--input image1.png image2.png`, `--size`, `--resolution`, `--model`), plus five worked examples covering the common cases (simple, sized output, high-res landscape, editing, pro model). This matches the 'fully executable, copy-paste ready, covers common cases' anchor.

Workflow Clarity

Both generation and editing workflows are clearly sequenced (ask the user for prompt/inputs → run the script → show the saved path), and the Error Handling section forms a feedback loop (check `GEMINI_API_KEY`, verify inputs are readable, retry with a more specific prompt). This matches the 'clear sequence with most checkpoints; minor validation gaps' anchor — the success step ("Show the user the saved image path when complete") exists but there is no explicit verify-output step that would warrant a 5. Image generation writes new files rather than destructively modifying inputs, so the destructive-operation cap does not apply.

Progressive Disclosure

No bundle files exist (no references/, scripts/, or assets/ directories), so the self-contained body is judged on its own structure: well-labeled sections (Requirements, Instructions, Available Options, Examples, Error Handling, Best Practices) with genuinely script-specific reference data (exact pixel sizes, model IDs, flags) that Claude cannot already know. This matches the 'good structure; most content appropriately placed; minor organization gaps' anchor — the 11-row aspect-ratio table is the kind of reference material that could live in a separate file, which keeps it from the 'appropriately split, easy navigation' anchor of 5.

Specificity

"Generate or edit images via Google Gemini (nanobanana)" names the domain and exactly two concrete actions — generate and edit — which matches the anchor for 1-2 concrete actions without comprehensive coverage. It does not list several specific actions (e.g., composing, background changes, style transfer) that would warrant a 4.

Completeness

Both questions are explicitly answered: what ("Generate or edit images via Google Gemini (nanobanana)") and when ("This is the DEFAULT image skill — use whenever the user asks to generate, create, or edit an image and does NOT name another provider"), with concrete trigger phrases and an explicit exclusion. This matches the anchor for a clear, explicit answer to both what and when; it exceeds the anchor of 4 where the 'when' could be more explicit.

Trigger Term Quality

Triggers "nanobanana", "generate image", "create image", "edit image" plus Chinese synonyms ("图片生成", "生成图片", "AI绘图", "图片编辑") give comprehensive natural-term coverage including synonyms, matching the top anchor; image tasks have no meaningful file extensions to add.

Distinctiveness Conflict Risk

"use whenever the user asks to generate, create, or edit an image and does NOT name another provider" plus "Do NOT use for diagrams (架构图/流程图/时序图) — draw those with Mermaid or code instead" establish a clear niche with distinct triggers and even preempt the nearest overlap (diagram drawing), matching the minimal-conflict-risk anchor rather than the 'minor overlap risk' anchor of 4.