add-strict-checks
Enable stricter TypeScript and linting checks to catch bugs early, especially useful when iterating with AI assistance.
Best use case
add-strict-checks is best used when you need a repeatable AI agent workflow instead of a one-off prompt.
Enable stricter TypeScript and linting checks to catch bugs early, especially useful when iterating with AI assistance.
Teams using add-strict-checks should expect a more consistent output, faster repeated execution, less prompt rewriting.
When to use this skill
- You want a reusable workflow that can be run more than once with consistent structure.
When not to use this skill
- You only need a quick one-off answer and do not need a reusable workflow.
- You cannot install or maintain the underlying files, dependencies, or repository context.
Installation
Claude Code / Cursor / Codex
Manual Installation
- Download SKILL.md from GitHub
- Place it in
.claude/skills/add-strict-checks/SKILL.mdinside your project - Restart your AI agent — it will auto-discover the skill
How add-strict-checks Compares
| Feature / Agent | add-strict-checks | Standard Approach |
|---|---|---|
| Platform Support | Not specified | Limited / Varies |
| Context Awareness | High | Baseline |
| Installation Complexity | Unknown | N/A |
Frequently Asked Questions
What does this skill do?
Enable stricter TypeScript and linting checks to catch bugs early, especially useful when iterating with AI assistance.
Where can I find the source code?
You can find the source code on GitHub using the link provided at the top of the page.
Related Guides
SKILL.md Source
# Add Strict Checks
**Goal:** Enable stricter TypeScript compiler options and linting to catch bugs that standard TypeScript misses.
---
## Task 1: Add Stricter Compiler Options
Add these additional strict options to `tsconfig.json` under `compilerOptions`:
```json
{
"compilerOptions": {
// ... existing options ...
"noImplicitReturns": true,
"noFallthroughCasesInSwitch": true,
"noImplicitOverride": true,
"forceConsistentCasingInFileNames": true,
"exactOptionalPropertyTypes": true,
"useUnknownInCatchVariables": true
}
}
```
---
## Task 2: Add Check Script
Add a check script to `package.json`:
```json
{
"scripts": {
"typecheck:app": "tsc --noEmit -p tsconfig.check.json",
"typecheck:tests": "tsc --noEmit -p tsconfig.test.json",
"check": "biome check . && npm run typecheck:app && npm run typecheck:tests"
}
}
```
---
## Task 3: Fix All Issues
Run `npm run check:write && npm run check` in a loop, fixing issues until it passes.
IMPORTANT: NEVER disable any checks:
- NEVER disable any biome checks,
- NEVER edit tsconfig.json to remove or disable a check
- NEVER edit tsconfig.check.json to remove or disable a check
- NEVER edit package.json to remove a check from a script
NEVER disable checks, even temporarily for any reason (including for easier work with third-party libraries)
Instead, fix the code to not violate the check.
---
## Task 4: Update CLAUDE.md
Update the "Before Committing" section to include `npm run check`:
```bash
npm test && npm run check
```
If tests aren't set up yet, just use:
```bash
npm run check
```
---
## Task 5: Commit
Ask the user if they want to commit the changes.
---
## Task 6: Offer Further Hardening
Ask the user: "Would you like to add backend testing as well? This sets up integration tests with an isolated test database."
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