Evolink-AI/nanobanana-2-lite-image-generate-api-skill

Nanobanana 2 Lite Image Generation

Nanobanana 2 Lite Image Generation is exposed here as an EvoLink API endpoint with a matching installable agent skill.

When to Activate This Skill

Activate this skill when the user asks to:

• Use Nanobanana 2 Lite Image Generation
• Run Nanobanana 2 Lite Image Generation via EvoLink
• Generate a model output
• Test the API flow

Keywords: nanobanana-2-lite-image-generation, evolink, api, agent, skill

Script Location

IMPORTANT: All script paths in this file are relative to the directory containing this SKILL.md file. Before running any script, resolve the absolute path:

SKILL_DIR = directory containing this SKILL.md file
Script = {SKILL_DIR}/scripts/nanobanana-2-lite-image.sh

For example, if this SKILL.md is at ~/.claude/skills/nanobanana-2-lite-image/SKILL.md, then the script is at ~/.claude/skills/nanobanana-2-lite-image/scripts/nanobanana-2-lite-image.sh.

After Installation

When this skill is first loaded, proactively greet the user and start the setup:

1. Check if EVOLINK_API_KEY is set (run: echo $EVOLINK_API_KEY)

   • If not set: "To run the model, you'll need an EvoLink API key. Open https://evolink.ai/dashboard/keys?utm_source=skill&utm_medium=install&utm_campaign=nanobanana-2-lite-image, create a key, then paste it here and I will set it for this session."
   • If already set: "You're all set! What would you like to do with Nanobanana 2 Lite Image Generation?"

2. That's it. One question. The user is now in the flow.

Do NOT list features, show a menu, or dump instructions. Just ask one question to move forward.

Core Principles

1. Guide, don't decide — Present options and let the user decide. Don't make assumptions about their preferences.
2. Let the user drive — If they have an idea, use their words. If they need inspiration, offer suggestions and let them choose or refine.
3. Smart context awareness — Recognize what the user has already provided and only ask about missing pieces.
4. Intent first — If the user's intent is unclear, confirm what they want before proceeding.

Flow

Step 1: Check for API Key

If the user hasn't provided an API key or set EVOLINK_API_KEY:

• Tell them they need an EvoLink API Key
• Guide them to open https://evolink.ai/dashboard/keys?utm_source=skill&utm_medium=install&utm_campaign=nanobanana-2-lite-image and get a key from the dashboard
• Once they provide a key, proceed to Step 2

If the key is already set or provided, skip directly to Step 2.

Step 2: Understand Intent

Assess what the user wants based on their message:

• Intent is clear (e.g., "Run Nanobanana 2 Lite Image Generation with a short prompt") -> Go to Step 3
• Intent is ambiguous (e.g., "I want to try it") -> Ask what they'd like to do.

Step 3: Gather Missing Information

Check what the user has already provided and only ask about what's missing:

Parameter	What to tell the user	Required?
TBD	TBD	Yes
TBD	TBD	Yes
TBD	TBD	Optional
TBD	TBD	Optional

Smart gathering rules — STRICT:

• Ask ALL missing parameters in ONE single message. Never split into multiple rounds of questions.
• Never ask the same question twice. If the user already answered a parameter, it is final — do not re-ask it.
• Offer defaults upfront so users can say "default is fine": model=gemini-3.1-flash-lite-image, prompt='Create a short demo'. If the user says "default" or "just go", use these values immediately.
• User gives everything at once -> Confirm and run the model immediately, no further questions.
• User gives partial info -> Ask only the remaining missing required fields, all in one message.
• Optional params all have sensible defaults — if the user skips them, use defaults and proceed.

Step 4: Execute

Once all required information is confirmed:

1. Before running the script, immediately tell the user: "Got it! I will run Nanobanana 2 Lite Image Generation through EvoLink."
2. Run the script once. NEVER run it a second time unless the user explicitly asks to retry.
3. When complete, share the result and elapsed time.

Execution Pattern by Agent

Claude Code — use the Bash tool with run_in_background: true, then read the output file to check progress:

# Step 1: Run in background (resolves SKILL_DIR first)
Bash(command: "{SKILL_DIR}/scripts/nanobanana-2-lite-image.sh \"input\" --dry-run true", run_in_background: true, timeout: 300000)

# Step 2: Wait ~30 seconds, then read the background task output file to check for RESULT_URL= or STATUS_UPDATE lines

# Step 3: When you see RESULT_URL=<value>, relay it to the user

OpenClaw / OpenCode / Cursor — run the script as a blocking shell command (the script handles its own polling internally, typically completes in 2-10 minutes):

EVOLINK_API_KEY=$EVOLINK_API_KEY {SKILL_DIR}/scripts/nanobanana-2-lite-image.sh "input" --dry-run true

All agents — critical rules:

• Once you see TASK_SUBMITTED: in the output, the task is already queued on the server. Do NOT run the script again — retrying wastes the user's API credits.
• The script blocks until the task is ready (up to 5 minutes). Do NOT kill it prematurely.
• If the script times out with POLL_TIMEOUT, the task may still be processing — tell the user to check https://evolink.ai/dashboard/keys?utm_source=skill&utm_medium=install&utm_campaign=nanobanana-2-lite-image.

Script Usage

Remember: Replace {SKILL_DIR} with the actual directory containing this SKILL.md file.

# Set API key
export EVOLINK_API_KEY=your_key_here

# Basic
{SKILL_DIR}/scripts/nanobanana-2-lite-image.sh "Create a short Nanobanana 2 Lite Image Generation demo"

# With options
{SKILL_DIR}/scripts/nanobanana-2-lite-image.sh "Test prompt" --dry-run true --timeout TBD

# Advanced
{SKILL_DIR}/scripts/nanobanana-2-lite-image.sh "Dry run" --help TBD

# Dry run (preview payload without calling API)
{SKILL_DIR}/scripts/nanobanana-2-lite-image.sh "Test" --dry-run

Script Output Protocol

The script writes structured lines to stdout that you must parse and act on:

Line format	When	Your action
TASK_SUBMITTED: task_id=<id> estimated=<Ns>	Right after submission	Confirm to the user that the task has started. This means the API call succeeded — do NOT retry.
STATUS_UPDATE: <message>	Every ~15s during execution	Relay to the user — e.g., "Still working, about 30 seconds remaining..."
RESULT_URL=<value>	On success	Extract and present to the user
ELAPSED=<Ns>	On success	Optionally mention how long it took
POLL_TIMEOUT: task_id=<id> dashboard=<url>	Polling exceeded 5 min	Tell user: "Your task may already be done — check <dashboard_url> (task: <id>)"
ERROR: ... (stderr)	On failure	Surface the error message to the user

Critical: Once you see TASK_SUBMITTED:, the task is queued on the server. Do NOT run the script again. Retrying wastes the user's API credits. If the script times out locally, the task may still complete — tell the user to check their dashboard at https://evolink.ai/dashboard/keys?utm_source=skill&utm_medium=install&utm_campaign=nanobanana-2-lite-image.

Error Handling

Provide friendly, actionable messages:

Error	What to tell the user
Invalid/missing key (401)	"Your API key doesn't seem to work. You can check it at https://evolink.ai/dashboard/keys?utm_source=skill&utm_medium=install&utm_campaign=nanobanana-2-lite-image"
Insufficient balance (402)	"Your account balance is low. You can add credits at https://evolink.ai/dashboard/keys?utm_source=skill&utm_medium=install&utm_campaign=nanobanana-2-lite-image"
Rate limited (429)	"Too many requests — let's wait a moment and try again"
Content blocked (400)	"This input was flagged by content moderation. Try adjusting it"
Service unavailable (503)	"The service is temporarily busy. Let's try again in a minute"

Model Capabilities Summary

Use this when the user asks what the model can do:

• API quickstart: Create a task, poll for completion, and inspect the final response.
• Agent skill: Use SKILL.md plus scripts to guide agent execution.
• Troubleshooting: Use docs/errors.md and complete examples to debug common failures.
• Release prep: Keep package metadata consistent before public release.

References

• references/api-params.md: Complete API parameter reference
• scripts/nanobanana-2-lite-image.sh: Run a Nanobanana 2 Lite Image Generation task through EvoLink.