JLCEDA Plugin Builder
Build extension plugins for EasyEDA Pro. Provides a complete API query workflow, code generation standards, and debugging toolchain.
Core Principles
- Never guess APIs — Check the Skill's
index.d.ts first; if not found = does not exist
- Verify class existence before use — Search class name with
grepSearch; no results = do not use
- Verify API mount path — The class where a method is defined ≠ the property it's mounted on under
eda
- Verify return type methods — Different methods on the same class may return completely different interface types
- Browser APIs are forbidden in the main process — Cannot use
localStorage, window, document; allowed inside iframe
- Document type values — SCH=1, PCB=3, FOOTPRINT=4 (PCB is not 2)
When to Use
Applicable:
- Creating or modifying EasyEDA Pro extension plugins
- Querying API method signatures in
@jlceda/pro-api-types
- Configuring
extension.json, locales i18n files, or build processes
- Automating plugin import/debugging via
eext-dev-mcp MCP tools
Not applicable:
- General TypeScript/JavaScript questions unrelated to EasyEDA Pro
- Non-EasyEDA Pro EDA tools
- Workspace has no
extension.json and user did not request initialization
API Query Workflow (Four Steps)
API type definition location: the index.d.ts file bundled with this Skill (sourced from @jlceda/pro-api-types). Always search in this file; do not look in node_modules.
Step 1: Find the Correct Class
grepSearch "SCH_PrimitiveComponent" # Schematic component class
grepSearch "PCB_PrimitiveVia" # PCB via class
Step 2: Verify the Class Is Mounted on the eda Object
grepSearch "sch_PrimitiveComponent:" # Note the colon
grepSearch "dmt_SelectControl:" # Verify mount path
Step 3: Find the Method and Confirm Its Signature
grepSearch "getCurrentDocumentInfo"
Then use readFile to read the full signature and confirm parameter types and return type.
Step 4: Verify the Return Interface Has the Required Methods
# Search the returned interface type to confirm it has the needed methods
grepSearch "ISCH_PrimitiveComponent$1" # Interfaces with $1 suffix usually have more methods
No search results = does not exist. Do not use!
Execution Workflow
- Plan — Understand requirements, confirm target editor (home/sch/pcb) and core functionality
- Init — If workspace is not initialized, run project initialization; otherwise skip
- Query — Dynamically query required APIs (four-step method); every API must be verified
- Validate — Verify all type signatures are complete with no guesswork; if uncertain, return to Query
- Confirm — Present implementation plan to user (API list, dependencies, data flow, file changes); wait for confirmation in Supervised mode. In Autopilot mode, skip this step for straightforward changes; only pause for complex or destructive operations
- Execute — Generate code; each API call corresponds to a verified signature, wrapped in
try/catch
- Check — Check runtime environment constraints; confirm no forbidden operations; if violations found, return to Execute to fix
API Verification Checklist (Required Before Using Any API)
Runtime Environment Constraints
| Requirement | ❌ Forbidden | ✅ Recommended |
|---|
| Get user input | - | eda.sys_Dialog.showInputDialog() |
| User selection | - | eda.sys_Dialog.showSelectDialog() |
| Show message | alert() | eda.sys_Dialog.showInformationMessage() |
| Confirm action | confirm() | eda.sys_Dialog.showConfirmationMessage() |
| Toast notification | DOM manipulation | eda.sys_Message.showToastMessage() |
| Store data | localStorage (main process) | eda.sys_Storage.setExtensionUserConfig(key, value) |
| Custom UI | Manipulate host DOM | eda.sys_IFrame.openIFrame() |
| Show HTML | showInformationMessage(html) | Must use iframe |
| Open link | window.open() | eda.sys_Window.open() |
| Browser hardware API | Use in main process | Available in iframe (navigator.serial, etc.) |
| IFrame data passing | (window as any).__xxx = data (main process and iframe window are isolated); window.parent.eda | ✅ Option A (recommended): Store with eda.sys_Storage.setExtensionUserConfig(key, value), read in iframe with getExtensionUserConfig(key); ✅ Option B: Call eda API directly from iframe (both main process and iframe can access the eda object; just use eda directly) |
Project Initialization
When extension.json does not exist in the workspace:
git clone https://github.com/easyeda/pro-api-sdk.git <project-name>
cd <project-name>
npm install
npm run compile
Failure Strategies
- API does not exist: Stop immediately, inform the user
- Signature uncertain: Stop generation, return to query step
- Workspace not initialized: Prompt user to initialize first
- Forbidden DOM API used: Automatically replace with
eda.sys_* alternatives
- Menu ID conflict: Automatically add prefix to differentiate (e.g.,
my-plugin-home, my-plugin-sch)
References
- Complete API module list, enum definitions →
resources/api-reference.md
- Common pitfalls and lessons learned →
resources/experience.md
- MCP tool documentation → "MCP Tools" section in
resources/api-reference.md
