regex

Use when writing or debugging regular expressions for pattern matching, validation, search, and text transformation. Covers regex syntax, common patterns, lookahead/lookbehind, character classes, quantifiers, and differences between regex flavors (PCRE, JavaScript, Python, .NET, POSIX). USE FOR: regular expressions, regex, pattern matching, text validation, search and replace, PCRE, regex lookahead, regex lookbehind, character classes, quantifiers, capturing groups, non-capturing groups, regex anchors DO NOT USE FOR: HTML/XML parsing (use a proper parser), complex data extraction (use jq or a programming language), natural language processing

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Repository: Tyler-R-Kendrick/agent-skills
Letzte Quellaktivität: 11. Februar 2026 um 05:14
Erkannte Sprache von SKILL.md: Englisch
Sterne: 10
Forks: 4

Installationsoptionen

Standardmäßig ist der Prompt ausgewählt, der zuerst die Quelle prüft. Sie können zu einem direkten Befehl wechseln oder eine lokale Kopie herunterladen.

Mit Codex oder Claude installieren Kopieren Sie diesen Prompt, fügen Sie ihn in Codex, Claude oder einen anderen Assistant ein und lassen Sie die Skill-Seite prüfen und installieren.

Ein direkter Befehl überspringt den Prüf-Prompt. Prüfen Sie die Quelle, bevor Sie ihn ausführen.

npx skills add https://github.com/Tyler-R-Kendrick/agent-skills --skill regex

Der Befehl bleibt in einer Zeile. Scrollen Sie horizontal, um ihn vor dem Kopieren vollständig zu prüfen.

Sie bevorzugen eine lokale Kopie? Laden Sie die Dateien herunter, die SkillsMP derzeit vorliegen.

Quelldateien prüfen

Lesen Sie SKILL.md und alle von SkillsMP angezeigten Begleitdateien, bevor Sie sich für eine Installation entscheiden.

Datei-Explorer

13 Dateien

SKILL.md

Quellanweisungen · Schreibgeschützte Vorschau

Zurück zur Suche Zurück zur Installation

improve

Use when producing agent/LLM evals, synthetic simulation data, or self-improvement pipelines for prompts, code, skills, agents, harnesses, and workflows. Covers AgentEvals/AgentV, Agent Skills evals, ASSERT, GEPA, Trace, VISTA, Agent Lightning, SkillOpt, Simula-style data design, progressive disclosure, deterministic workspaces, and release evidence. USE FOR: eval creation, EVAL.yaml, AgentEvals, AgentV, evals.json, ASSERT, judge-traces, behavior taxonomy, judges, graders, rubrics, synthetic data, simulation data, Simula, QDC, source-grounded generation, prompt optimization, agent improvement, skill improvement, harness hardening, progressive disclosure, deterministic workflows, GEPA, Trace, VISTA, Agent Lightning, SkillOpt DO NOT USE FOR: ordinary unit/integration tests without AI quality criteria (use testing), refactoring without eval or trace feedback (use refactor), generic Agent Skills packaging without eval or improvement work (use agent-skills)

2026-06-09

Use when working with AI agent protocols, standards, interoperability specifications, evaluation contracts, synthetic simulation data, improvement pipelines, and agent steering workflows. Covers MCP, A2A, ACP, Agent Skills, AGENTS.md, ADL, Improve, x402, AP2, MCP Apps, cagent, and learn. USE FOR: agent protocol selection, comparing MCP vs A2A vs ACP, understanding agent standards ecosystem, choosing payment protocols, choosing eval standards, choosing improvement techniques, choosing synthetic data simulation techniques, steering from user feedback DO NOT USE FOR: specific protocol, eval, or improvement implementation details (use the sub-skills: mcp, a2a, acp, improve, learn, x402, etc.)

2026-06-09

learn

Use when a user corrects, rejects, edits, or redirects an LLM/agent response and the correction should become a reusable reasoning strategy. Converts feedback into generalized learnings for ~/.agents/STEERING.md with linked RDF/Turtle evidence. USE FOR: user corrections, preference feedback, rejected agent behavior, reasoning strategy updates, steering file maintenance DO NOT USE FOR: storing task facts (use memory), ordinary skill authoring (use agent-skills), project instruction files unrelated to feedback (use agents-md)

2026-06-08

Alle aus diesem Repository ansehen

name	regex
description	Use when writing or debugging regular expressions for pattern matching, validation, search, and text transformation. Covers regex syntax, common patterns, lookahead/lookbehind, character classes, quantifiers, and differences between regex flavors (PCRE, JavaScript, Python, .NET, POSIX). USE FOR: regular expressions, regex, pattern matching, text validation, search and replace, PCRE, regex lookahead, regex lookbehind, character classes, quantifiers, capturing groups, non-capturing groups, regex anchors DO NOT USE FOR: HTML/XML parsing (use a proper parser), complex data extraction (use jq or a programming language), natural language processing
license	MIT
metadata	{"displayName":"Regular Expressions","author":"Tyler-R-Kendrick"}
compatibility	claude, copilot, cursor
references	[{"title":"Regular-Expressions.info","url":"https://www.regular-expressions.info"},{"title":"PCRE2 Specification","url":"https://www.pcre.org/current/doc/html/"}]

Regular Expressions

Overview

Regular expressions are a cross-cutting skill used in every language, every editor, every CLI tool, and every CI pipeline. They are powerful for pattern matching but can be cryptic — this skill provides a readable reference.

Element	Syntax	Description	Example
Literal	`abc`	Matches "abc"	`abc` matches "abc"
Dot	`.`	Any single character	`a.c` matches "abc", "a1c"
Start anchor	`^`	Start of string/line	`^Hello` matches "Hello world"
End anchor	`$`	End of string/line	`world$` matches "Hello world"
Word boundary	`\b`	Word boundary	`\bcat\b` matches "cat" not "scatter"
Character class	`[abc]`	Any of a, b, or c	`[aeiou]` matches vowels
Range	`[a-z]`	Any char in range	`[0-9]` matches digits
Negated class	`[^abc]`	Any char NOT in set	`[^0-9]` matches non-digits
Shorthand	`\d \w \s`	Digit, word char, whitespace	`\d+` matches "123"
Quantifier	`* + ? {n}`	Repetition	`a{3}` matches "aaa"
Alternation	`\|`	OR	`cat\|dog` matches either
Group	`()`	Capturing group	`(ab)+` matches "abab"
Non-capturing	`(?:)`	Group without capture	`(?:ab)+` matches "abab"
Escape	`\`	Literal special char	`\.` matches "."

Quantifier	Meaning	Greedy	Lazy
`*`	0 or more	`.*`	`.*?`
`+`	1 or more	`.+`	`.+?`
`?`	0 or 1	`.?`	`.??`
`{n}`	Exactly n	`a{3}`	—
`{n,}`	n or more	`a{2,}`	`a{2,}?`
`{n,m}`	Between n and m	`a{2,4}`	`a{2,4}?`

Class	Matches	Equivalent
`\d`	Digit	`[0-9]`
`\D`	Non-digit	`[^0-9]`
`\w`	Word character	`[a-zA-Z0-9_]`
`\W`	Non-word character	`[^a-zA-Z0-9_]`
`\s`	Whitespace	`[ \t\n\r\f\v]`
`\S`	Non-whitespace	`[^ \t\n\r\f\v]`

Purpose	Pattern	Notes
Email (simplified)	`[\w.+-]+@[\w-]+\.[\w.]+`	Covers most common formats
URL	`https?://[\w\-.]+(:\d+)?(/[\w\-./?%&=]*)?`	HTTP and HTTPS
IPv4	`\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b`	Does not validate range
ISO date	`\d{4}-\d{2}-\d{2}`	YYYY-MM-DD format
UUID	`[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}`	Lowercase hex
US phone	`\(?\d{3}\)?[-.\s]?\d{3}[-.\s]?\d{4}`	With optional formatting
Semantic version	`\d+\.\d+\.\d+(-[\w.]+)?(\+[\w.]+)?`	Major.Minor.Patch with optional pre-release
Strong password	`^(?=.[a-z])(?=.[A-Z])(?=.\d)(?=.[@$!%?&])[A-Za-z\d@$!%?&]{8,}$`	Min 8 chars, upper, lower, digit, special

Type	Syntax	Description
Positive lookahead	`(?=...)`	Matches if followed by
Negative lookahead	`(?!...)`	Matches if NOT followed by
Positive lookbehind	`(?<=...)`	Matches if preceded by
Negative lookbehind	`(?<!...)`	Matches if NOT preceded by

regex

Installationsoptionen

Quelldateien prüfen

Regular Expressions

Overview

Regular Expressions

Overview

Core Syntax

Quantifiers

Character Classes

Common Patterns

Lookahead and Lookbehind

Practical Examples

Flavor Differences

Testing and Debugging

Best Practices

Feature	JavaScript	Python	PCRE (.NET/PHP/grep -P)	POSIX (grep/sed)
Named groups	`(?<name>)`	`(?P<name>)`	`(?P<name>)` or `(?<name>)`	Not supported
Lookbehind	Fixed-length only	Variable-length	Variable-length	Not supported
Unicode	`\p{L}`	`\p{L}` with `re.UNICODE`	`\p{L}`	Limited
Backreferences	`\1`	`\1`	`\1`	`\1`

regex

Quellinformationen

Installationsoptionen

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Mehr aus diesem Repository

Mehr aus diesem Repository

Regular Expressions

Overview

Regular Expressions

Overview

Core Syntax

Quantifiers

Character Classes

Common Patterns

Lookahead and Lookbehind

Practical Examples

Flavor Differences

Testing and Debugging

Best Practices