Development

Programming, frameworks, implementation, frontend, backend, and app development

skills in category: 62,560
pages available: 2,607

Security grades appear on each card once the skill has been scanned. Newly imported skills may briefly show without a grade until the backfill job runs.

Open in full browser

Browse development skills

Showing 9,745–9,768 of 62,560 skills

Generate Spec V2ACreate a code-based implementation spec in the specs/ directory for a significant feature, fix, or refactor. Use when the user asks to plan, spec, scope, or phase work before implementation and the plan should cover top-level Mermaid flows, important types, per-phase call-stack and code diffs, commit-sized phases, and checks.developmentgonodeVotes: 0GitHub stars: 896
Fix Merge ConflictsAResolve Git merge, rebase, or cherry-pick conflicts by preserving intent from both sides. Use when unmerged paths or conflict markers are present, especially when you must inspect the PR title and description tied to conflicting commits before choosing a resolution.developmentgobashVotes: 0GitHub stars: 896
ErroreAerrore is Go-style error handling for TypeScript: return errors instead of throwing them. Instead of Go's two-value tuple (val, err), functions return a single Error | T union. Instead of checking err != nil, you check instanceof Error. TypeScript narrows the type automatically — forget to check and your code won't compile. No wrapper types, no Result monads, just unions and instanceof. The errore npm package provides helper utilities (createTaggedError, tryAsync, matchError, findCause, parti...developmenttypescriptgoVotes: 0GitHub stars: 896
HandelsregisterASearch the German commercial register (Handelsregister), download registry documents for a company — Gesellschafterliste (shareholder list), Gesellschaftsvertrag (articles of association), current/chronological printouts (AD/CD), structured XML (SI) — and query date-based Registerbekanntmachungen (Löschungsankündigungen, UmwG announcements, new filings). Use when the user asks for a Handelsregisterauszug, Gesellschafterliste, registry documents, company data from handelsregister.de, or recent...developmentgogitVotes: 0GitHub stars: 2
Icca HarnessAICCA names the four separated roles that carry the method: Implementer, Checker, Control, Auditor. Mandatory development workflow for any task that changes production code, fixes a bug, adds a feature, performs a refactor, or creates a commit. MUST be loaded before implementation begins. Keeps the orchestrator's context lean (delegation to a cheaper implementer tier, index navigation, evidence ledger) and enforces Commit Contract, Red Proof, frozen acceptance tests, delegated implementation, ...developmentpythonrustVotes: 0GitHub stars: 2
Typescript Clean CodeAUse when writing, fixing, editing, reviewing, or refactoring any TypeScript code. Enforces Robert Martin's complete Clean Code catalog—naming, functions, comments, DRY, and boundary conditions.developmenttypescriptgoVotes: 0GitHub stars: 2
Ts Clean TestsAUse when writing, fixing, editing, or refactoring TypeScript tests. Enforces Clean Code principles—fast tests, boundary coverage, one assert per test. Also trigger on: slow or flaky tests, `test.skip`/`it.skip`/`.todo` without a clear reason, `test.only` left in committed code, tests that only cover the happy path, tests with multiple assertions about different concepts, missing boundary cases (empty arrays, off-by-one, page zero), or asks about "coverage gap" / "edge case".developmenttypescriptgoVotes: 0GitHub stars: 2
Ts Clean NamesAUse when naming, renaming, or fixing names of variables, functions, classes, interfaces, or modules in TypeScript. Enforces Clean Code principles—descriptive names, appropriate length, no encodings. Also trigger on: single-letter or cryptic identifiers (`d`, `x`, `proc`), Hungarian notation (`strName`, `arrUsers`, `nCount`), `I`-prefixed interfaces (`IUserRepository`), function names that hide side effects (e.g. `getConfig` that also mutates state), ambiguous names like `rename(source, target...developmenttypescriptgoVotes: 0GitHub stars: 2
Ts Clean GeneralAUse when writing, fixing, editing, or reviewing TypeScript code quality. Enforces Clean Code's core principles—DRY, single responsibility, clear intent, no magic numbers, proper abstractions. Also trigger on: duplicated logic across files or branches (G5), magic numbers or hardcoded strings (G25), long if/else chains that should be union types plus polymorphism (G23), chained property access like `a.b.c.d` or long optional-chain trains (G36), functions juggling multiple responsibilities (G30)...developmenttypescriptgoVotes: 0GitHub stars: 2
Ts Clean FunctionsAUse when writing, fixing, editing, or refactoring TypeScript functions. Enforces Clean Code principles—maximum 3 arguments, single responsibility, no flag parameters. Also trigger on: functions (or React components) with 4+ parameters/props, boolean flag parameters like `isTest`, functions that mutate their parameters (e.g. push to an input array), unused exports or dead helper functions, or asks like "too many props", "split this function", "is this still used". Also trigger on: helpers defi...developmenttypescriptgoVotes: 0GitHub stars: 2
Ts Clean CommentsAUse when writing, fixing, editing, or reviewing TypeScript comments and TSDoc. Enforces Clean Code principles—no metadata, no redundancy, no commented-out code. Also trigger on: commented-out code blocks, TODO/FIXME banners, author/ticket/date metadata in comments or TSDoc, TSDoc that no longer matches the code, redundant comments that restate the code (e.g. `i += 1; // increment i`), or asks like "is this comment useful", "why is this block commented".developmenttypescriptgoVotes: 0GitHub stars: 2
Ts Boy ScoutAUse when fixing, editing, changing, debugging, or working with any TypeScript code. Applies the Boy Scout Rule—always leave code cleaner than you found it. Orchestrates other clean code skills as needed. Also trigger on: "while you're at it", "any quick wins", "improve this a bit", "anything else obviously wrong", or when editing existing TypeScript and an adjacent small cleanup is possible alongside the asked-for change.developmenttypescriptdebuggingVotes: 0GitHub stars: 2
Python Clean CodeAUse when writing, fixing, editing, reviewing, or refactoring any Python code. Enforces Robert Martin's complete Clean Code catalog—naming, functions, comments, DRY, and boundary conditions.developmentpythongoVotes: 0GitHub stars: 2
Py Clean TestsAUse when writing, fixing, editing, or refactoring Python tests. Enforces Clean Code principles—fast tests, boundary coverage, one assert per test. Also trigger on: slow or flaky tests, `@pytest.mark.skip` without a clear reason, tests that only cover the happy path, tests with multiple assertions about different concepts, missing boundary cases (empty input, off-by-one, page zero), or asks about "coverage gap", "edge case", "did we test".developmentpythongoVotes: 0GitHub stars: 2
Py Clean NamesAUse when naming, renaming, or fixing names of variables, functions, classes, or modules in Python. Enforces Clean Code principles—descriptive names, appropriate length, no encodings. Also trigger on: single-letter or cryptic identifiers (`d`, `x`, `proc`), Hungarian notation (`str_name`, `lst_users`, `i_count`), `I`-prefixed classes, function names that hide side effects (e.g. `get_config` that also writes a file), non-standard abbreviations, or asks like "rename this", "what does this variab...developmentpythongoVotes: 0GitHub stars: 2
Py Clean GeneralAUse when writing, fixing, editing, or reviewing Python code quality. Enforces Clean Code's core principles—DRY, single responsibility, clear intent, no magic numbers, proper abstractions. Also trigger on: duplicated logic across files or branches (G5), magic numbers or hardcoded values (G25), long if/elif chains that should be polymorphism (G23), chained property access like `a.b.c.d` (G36), functions juggling multiple responsibilities (G30), clever one-liners whose intent is not obvious (G16...developmentpythongoVotes: 0GitHub stars: 2
Py Clean FunctionsAUse when writing, fixing, editing, or refactoring Python functions. Enforces Clean Code principles—maximum 3 arguments, single responsibility, no flag parameters. Also trigger on: functions with 4+ parameters, boolean flag parameters like `enabled=True`, functions that mutate their arguments in place, one-off `util`/`helper` functions that are never called, or asks like "too many arguments", "split this function", "is this still used". Also trigger on: helper functions defined above the entry...developmentpythongoVotes: 0GitHub stars: 2
Py Clean CommentsAUse when writing, fixing, editing, or reviewing Python comments and docstrings. Enforces Clean Code principles—no metadata, no redundancy, no commented-out code. Also trigger on: commented-out code blocks, TODO/FIXME banners, author/ticket/date metadata in comments, docstrings that no longer match the code, redundant comments that restate the code (e.g. `i += 1 # increment i`), or asks like "is this comment useful", "why is this block commented".developmentpythongoVotes: 0GitHub stars: 2
Py Boy ScoutAUse when fixing, editing, changing, debugging, or working with any Python code. Applies the Boy Scout Rule—always leave code cleaner than you found it. Orchestrates other clean code skills as needed. Also trigger on: "while you're at it", "any quick wins", "improve this a bit", "anything else obviously wrong", or when editing existing Python and an adjacent small cleanup is possible alongside the asked-for change.developmentpythondebuggingVotes: 0GitHub stars: 2
Java Clean TestsAEnforces test quality in Java with JUnit 5 and AssertJ — one concept per test, boundary coverage, fast isolated tests, parameterised cases, and no disabled tests without a reason. Use when writing or reviewing Java tests, and when the user mentions JUnit, AssertJ, Mockito, Testcontainers, @ParameterizedTest, @Disabled, flaky tests, coverage gaps, or asks "how should I test this".developmentgojavaVotes: 0GitHub stars: 2
Java Clean NamesAEnforces naming in Java 21+ — descriptive names, names matched to scope, no Hungarian notation or I-prefixed interfaces, no meaningless suffixes like Manager or Helper, and names that reveal side effects. Use when naming or renaming variables, fields, methods, classes, records, interfaces, or packages in Java, and when the user asks "rename this", "better name", "what should I call this", or the code shows cryptic identifiers, `Impl` suffixes, or getters that mutate.developmentgojavaVotes: 0GitHub stars: 2
Java Clean GeneralAEnforces general code quality in Java 21+ — DRY, no magic numbers, immutability by default, sealed hierarchies and pattern matching over instanceof chains, encapsulation over getters and setters, and streams used where they clarify. Use when reviewing or refactoring Java for quality, and when the code shows duplication, hardcoded values, long if-else or switch chains on type, mutable shared state, anaemic classes, deep call chains like a.getB().getC().getD(), or clever one-liners. Also trigge...developmentgojavaVotes: 0GitHub stars: 2
Java Clean FunctionsAEnforces method design in Java 21+ — small methods that do one thing, at most three parameters, no boolean flag arguments, no null returns or arguments, and command-query separation. Use when writing or refactoring Java methods and constructors, and when the code shows long methods, parameter lists of four or more, boolean flags, deep nesting, output parameters, or methods returning null. Also trigger on: private helpers placed above the public methods that call them, a class that must be rea...developmentgojavaVotes: 0GitHub stars: 2
Java Clean CommentsAEnforces comment and Javadoc hygiene in Java — no commented-out code, no author or ticket metadata, no comments restating the code, and Javadoc that documents contracts rather than repeating signatures. Use when writing or reviewing Java comments and Javadoc, and when the code shows commented-out blocks, TODO or FIXME banners, @author or date tags, boilerplate Javadoc, or documentation that no longer matches the method.developmentrustgoVotes: 0GitHub stars: 2