🧮 BagIdea Office — Calculator Plugin

A real, installable BagIdea Office plugin and a worked example for plugin authors. It's a scientific calculator with a safe math engine (no eval/Function) shared by a panel UI and an agent command.

• Basic arithmetic + - * / % ^ with correct precedence and unary minus
• Functions: sin cos tan asin acos atan sinh cosh tanh sqrt cbrt exp ln log log2 abs floor ceil round sign deg rad, factorial !
• Constants: pi e tau phi
• Lives in a panel and an agent command (calc) — same engine for both

Built on the BagIdea Office plugin template.

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Install

bagidea plugin install https://github.com/bagidea/bagidea-office-calculator-plugin

(or paste the URL into the 🧩 Plugins panel → Install). Remove with bagidea plugin remove calculator.

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What to learn from it

File	The pattern it shows
plugin.json	A minimal manifest with one agent command (calc).
index.js	A plugin that needs no ctx — pure logic exposed as both an onCommand and a custom GET route (/plugin/calculator/eval). Safe parsing via tokenizer → shunting-yard → RPN.
panel.html	A flex-column layout that fills the panel height with no scrollbar, the office dark theme, and a single BASE path that the UI calls.

Use it for agents:

curl -s -X POST http://127.0.0.1:8787/plugin/calculator/cmd \
  -H "content-type: application/json" -d '{"cmd":"calc","args":"2*(3+4)^2"}'
# → {"ok":true,"expr":"2*(3+4)^2","result":98,"msg":"2*(3+4)^2 = 98"}

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Build your own

Fork this (or the template), edit the three files, and reload while developing:

curl -s -X POST http://127.0.0.1:8787/plugins/reload -H "x-bagidea-ui: 1"

Full spec — ctx API, routes, streaming, agent integration — is in the office repo: docs/guide/plugins.md.

License

MIT — see LICENSE.