Fix javascript typecheck issues

.github/instructions/github-script.instructions.md

@@ -0,0 +1,49 @@
+---
+description: GitHub Action Script Source Code
+applyTo: "pkg/workflow/js/*.cjs"
+---
+
+This JavaScript file will be run using the GitHub Action `actions/github-script@v7` which provides the `@actions/core`, `@actions/github` packages for logging errors and setting action status.
+
+- do not add import or require for `@actions/core`
+- reference: 
+  - https://github.com/actions/toolkit/blob/main/packages/core/README.md
+  - https://github.com/actions/toolkit/blob/main/packages/github/README.md
+
+## Best practices
+
+- use `core.info`, `core.warning`, `core.error` for logging, not `console.log` or `console.error`
+- use `core.debug` for verbose debug logging, which can be enabled in action settings
+- use `core.setOutput` to set action outputs
+- use `core.exportVariable` to set environment variables for subsequent steps
+- use `core.getInput` to get action inputs, with `required: true` for mandatory inputs
+- use `core.setFailed` to mark the action as failed with an error message
+
+## Step summary
+
+Use `core.summary.*` function to write output the step summary file.
+
+- use `core.summary.addRaw()` to add raw Markdown content (GitHub Flavored Markdown supported)
+- make sure to call `core.summary.write()` to flush pending writes
+- summary function calls can be chained, e.g. `core.summary.addRaw(...).addRaw(...).write()`
+
+## Common errors
+
+- avoid `any` type as much as possible, use specific types or `unknown` instead
+- catch handler: check if error is an instance of Error before accessing message property
+
+```js
+catch (error) {
+  core.setFailed(error instanceof Error ? error : String(error));
+}
+```
+
+- `core.setFailed` also calls `core.error`, so do not call both
+
+## Typechecking
+
+Run `make js` to run the typescript compiler.
+
+Run `make lint-cjs` to lint the files.
+
+Run `make fmt-cjs` after editing to format the file.