Read lck and ulck exposure policy — Build the smallest useful slice

PART I

Warm-up

Reconnect with a useful idea before starting read lck and ulck exposure policy. In one or two sentences, describe the input, output or host boundary from the previous exercise that this lesson builds on. If you are arriving directly, skim the worked example first; there is no locked prerequisite.

A rough note is enough. You can revise it after the example.

PART II

Instruction & guided example

Build one useful exposed entry instead of an entire subsystem

The proposed lck/ulck exposure policy controls which host APIs a script can see. Read it as a surface-selection decision, separate from the capability checks on each resource request. This source does not supply a concrete executable manifest schema here, so use explicit policy tables rather than inventing configuration syntax or transferring native linkage assumptions.

A mod needs to request a workshop screen, not manage all host windows. Sample public-surface artifact exposes a narrowly documented workshop-open entry and keeps internal window registry operations hidden. The resource contract still validates the caller and target. This reduces accidental coupling while retaining a useful action.

Do not claim the exact wrapper signature exists in the source. Describe the desired entry’s input/output/failure contract in prose and mark concrete API naming as pending. Exposing every internal method because one action is needed increases unsupported assumptions.

Worked reasoning and supplied artifact

// Worked contract artifact:
// A mod needs to request a workshop screen, not manage all host windows. Sample public-surface artifact exposes a narrowly documented workshop-open entry and keeps internal window registry operations hidden. The resource contract still validates the caller and target. This reduces accidental coupling while retaining a useful action.

Illustrative example from the proposed WillowScript design. The language and WUIX/WMATH/WDB/WAUDIO/WTMP services are not implemented in the supplied source. This site has no interpreter, VM or native host and does not execute or certify the snippet.

Try the guided change

Write the minimal input, desired outcome and refusal contract for the one exposed action.

• Write the supplied inputs and initial state before following the example.
• Reconstruct each intermediate calculation or host decision, then compare with the worked artifact.
• Explain why the contrasting alternative fails before attempting the changed inputs in Part IV.

PART III

Take a breather

Step back after the guided example. Look away from the screen, stretch, or reread your prediction. This is an optional learning pause, not a timer or an assessment gate.

When you return, try to name the lesson’s key idea without copying its wording. If that feels difficult, return to Part II and trace one line rather than restarting the entire lesson.

PART IV

Independent practice

Project context: Safe extension design. Build a small, understandable change around read lck and ulck exposure policy.

Design one read-only inventory summary entry for a mod and list two internal write operations it should not expose. Include a denied collection case.

What to produce

A narrow entry contract, hidden-operation list and separate read permission rule.

• State the intended behavior in a sentence before editing.
• Use only source-backed syntax and the host services whose contract you have been given.
• Record a normal case and a boundary or unavailable-resource case.
• Label hand predictions separately from anything actually measured in a supplied toolchain.

Syntax colors are a reading aid, not a compiler. The line you are editing stays uncolored until you move to a different line; capitalization is never changed. Drafts stay on this browser and code is not executed.

import wuix.widget;
const button = widget.Button({
    text: "Continue",
    events: {
        click: fnc() -> void {
            navigator.open("dashboard");
        }
    }
});

PART V

Self-check

Use this check to notice what to revisit. It does not award a private course grade, block another page or claim to verify compiled code. Every answer has a learning explanation.

You may keep exploring even if you are unsure. Use the hint, compare the trace, and revise your explanation.

PART VI

Recap & small task

Bring the idea back to the mod feature you are building. A useful recap connects the mechanism to a decision you can make in your own code.

• Build one useful exposed entry instead of an entire subsystem
• Write the minimal input, desired outcome and refusal contract for the one exposed action.
• Separate source-backed behavior, host requirements and untested predictions.

One small recap task

Write the minimal input, desired outcome and refusal contract for the one exposed action.

This marks your personal practice record only. It is not a certification or an official workspace assessment.