Sandboxed WebAssembly plugins whose API is the command registry:
- figcraft-plugin (new crate, L2): the figcraft-plugin.json manifest
(menu commands with parameters, read/write access, command allowlist)
and the sandbox: wasmi (pure Rust, no JIT, also in the web build) with
fuel metering, a memory cap, no WASI and seven host functions (call,
selection, reply_len, reply_read, log, notify, set_output).
- Engine: plugin.list / plugin.import / plugin.remove / plugin.run,
plugins.runLast (Alt+Cmd+P; Ctrl+Alt+Shift+P on Windows/Linux) and
plugins.manage. A run is one undo step (Session::grouped, which
command.batch now uses too) and is rolled back when it fails. Files,
other documents, the undo history, dialogs and plugins are off limits;
read-only plugins can't change the document. Installed plugins live in
the preferences; development plugins re-read their module every run.
- UI: installed plugins in the Plugins menu, a parameters form drawn
from the manifest, Manage plugins, Plugins > Development > Import
plugin from manifest.
- plugins/: a no_std Rust SDK and two example plugins (Tidy names,
Swatch grid), built for wasm32 by `cargo xtask plugins` (part of
`cargo xtask wasm`).
- Docs: docs/plugins.md (manifest, permissions, limits, ABI, SDK),
docs/mcp.md, docs/control-protocol.md, README, ROADMAP, parity.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
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