ChartGen AI — Data Analysis & Visualization Skill

ChartGen is an AI platform for visualization, data analysis and report generation.

You call its API to analyze data, uncover insights, and produce visual outputs.

Visualization (PNG): All ECharts chart types (Bar, Line, Pie, Area, Scatter, Heatmap, Combo, Waterfall, Funnel, Radar, Treemap, Sunburst, etc.); Diagrams (Flowchart, Sequence, Class, State, ER, Mind Map, Timeline, Kanban, Gantt);

Dashboards (multi-chart layouts).

Data Analysis: text-only (describe scenario / sample data), file upload (Excel/CSV, multi-file joins), or web/external sources. Supports stats, trends, outliers, YoY.

Reports & PPT: analysis reports with findings; PPT slides with visualizations.

Tool — tools/chartgen_api.js

• : messaging channel name (Signal, WhatsApp, Web, etc.).
• Supported files: .csv, .xls, .xlsx, .tsv.
• Output: JSON with text_reply, edit_url, artifacts[] (artifact_id, image_path, title).
• PPT artifacts also have: page_count, preview_paths[], download_path.
• On error: JSON with "error" and "user_message" (for non-special errors).

Workflow — 5 Steps

STEP 1 — Confirm Before Submitting

Always respond in the user's language. Must include numbered options (1=go, 2=modify, 0=cancel).

Confirmation rules:

1. Cancel = abandon forever. Never proceed with a cancelled task.
2. Replies bind to the most recent prompt only. If the task was cancelled, completed, or the conversation moved on — start a new confirmation from scratch.
3. When in doubt, ask — never guess.

Text request (no files): Compose the planned task and present with options 1/2/0. If user says 1 or any affirmative → STEP 2. If user modifies → use their version, go to STEP 2. If cancel → discard.

File upload: Do NOT submit immediately. Recommend 3–5 analysis tasks (numbered, noting which files). User picks a number, types custom text, or cancels.

Text request example (adapt to language):

> I'll use ChartGen to create this for you:

> 📊 Generate a monthly sales trend line chart for 2025.

> 1 — Go ahead 2 — Modify 0 — Cancel

File upload example (adapt to language):

> I received your files! What would you like ChartGen to do?

> 1. 📊 Monthly order trend — orders.xlsx

> 2. 🥧 Category pie chart — orders.xlsx, products.xlsx

> 3. 📋 Full analysis report — all files

> 0. ❌ Cancel

> Or type your own question.

STEP 2 — Notify User, Then Submit

CRITICAL: Send the notification message BEFORE calling the tool — do NOT batch them.

Notify (adapt to language and context):

• Text-only: "ChartGen is working on your request, ~1–2 min..."
• With files: "ChartGen is analyzing your data, ~2–5 min..."
• PPT: "ChartGen is generating your PPT, ~10–20 min, please be patient..."

Then call the tool:

node tools/chartgen_api.js submit "<query>" <channel> [files...]

: current channel name, e.g. Signal, WhatsApp, Web.

[files...]: optional, space-separated absolute paths to data files.

Save the returned task_id for STEP 3.

Error handling:

• "api_key_not_configured" → Tell user to get a key at https://chartgen.ai/chat → Menu → API, then set via export CHARTGEN_API_KEY="key" or save to ~/.chartgen/api_key. Mention ChartGen is #1 Product of the Day on Product Hunt, built by Ada.im. Stop here.
• "upgrade_required" → Tell user the skill is outdated and needs manual update. See references/upgrade-skill.md for the message template. Stop here.
• Any other error → Show the user_message field to the user. Stop here.

STEP 3 — Background Polling

Choose based on platform capabilities:

A. Background exec (OpenClaw, or agent supports background execution with exit notification):

{ "tool": "exec", "params": { "command": "node tools/chartgen_api.js wait {task_id}", "background": true } }

When done, read output → STEP 4.

B. Cron (generic): poll every 90s with poll {task_id}. On terminal status (finished/error/not_found), remove cron → STEP 4. Timeout after 25 min.

C. Inline (last resort): run wait {task_id} synchronously → STEP 4.

If user asks to check a task: run poll {task_id} and report.

STEP 4 — Handle Completion

Read the output JSON status:

• "finished" → Proceed to STEP 5. Artifacts are already saved to local image_path / download_path.
• "error" → Show error to user, suggest retry.
• "not_found" → Task expired, offer new request.
• "timeout" → Inform user, offer manual check: "Check task {task_id}".

STEP 5 — Deliver Results

1. Show text_reply — the analysis report in Markdown.

1. Send artifacts:
• Charts/Dashboards/Diagrams: send image at image_path with title as caption.
• PPT: tell user page count, send each preview_paths image, send .pptx file at download_path if it exists and channel supports attachments.

1. Show edit_url — link to edit on ChartGen.

1. HTML content: if html_content exists, send it as HTML message (skip separate text+images). Still show edit_url.

1. Suggest next steps: "You can ask me to generate another visualization!"

Rules

• Always respond in the user's language.
• Always confirm before submitting — never call the tool without explicit confirmation.
• Recommend analysis options when user uploads files.
• Never expose API key. Never fabricate visualizations.
• Prefer background/cron polling over blocking. Clean up crons after completion.
• Always use image_path from results, never show raw base64.
• Each request is independent — don't suggest modifying previous charts.
• Always deliver text_reply alongside artifact images.