Rogue subclass
Thief
Fast object use, climbing 
D&D Portal - Climbing Movement rule Climbing is a movement rule used during
exploration, encounters, and combat. Full link: https://dnd-portal.com/rules/movement/climbing/, stealth 
D&D Portal - Stealth Skill reference Stealth is a skill used for ability checks
in relevant situations. Full link: https://dnd-portal.com/rules/skills/stealth/, and magic-item improvisation.
Thief starts by changing the normal Rogue play pattern through Fast Hands; Second-Story Work, giving the subclass its first clear mechanical identity.
Later features such as Supreme Sneak, Use Magic Device, Thief’s Reflexes expand that identity at higher levels, so the subclass has a clearer role in combat, exploration, utility, or support.
Fast Hands; Second-Story Work
3rd level
Use Cunning Action for Sleight of Hand 
D&D Portal - Sleight of Hand Skill reference Sleight of Hand is a skill used for ability checks
in relevant situations. Full link: https://dnd-portal.com/rules/skills/sleight-of-hand/, thieves’ tools, or Use an Object, and improve climbing D&D Portal - Climbing Movement rule Climbing is a movement rule used during
exploration, encounters, and combat. Full link: https://dnd-portal.com/rules/movement/climbing/ and running jumps.
Supreme Sneak
9th level
Gain advantage on Stealth D&D Portal - Stealth Skill reference Stealth is a skill used for ability checks
in relevant situations. Full link: https://dnd-portal.com/rules/skills/stealth/ while moving no more than half speed 
D&D Portal - Speed Movement rule Speed is a movement rule used during
exploration, encounters, and combat. Full link: https://dnd-portal.com/rules/movement/speed/.
Use Magic Device
13th level
Ignore many class, species, and level restrictions on magic items and gain additional attunement flexibility.
Thief’s Reflexes
17th level
Take two turns during the first round of combat.
FAQ
What is the Thief Roguish Archetype?
The Thief is an agility and utility Rogue that expands Cunning Action into fast object and thieves' tool use, climbs efficiently, sneaks reliably and eventually ignores many magic-item restrictions. Thief begins at Rogue 3 and expands object use, climbing, stealth, and magic-item flexibility while keeping the base Rogue's precision damage, skills, mobility, and defensive progression.
Read more: Thief 
D&D Portal - What is the Thief Roguish Archetype? Thief FAQ The Thief is an agility and utility Rogue that expands Cunning Action into fast object and thieves' tool use, climbs efficiently, sneaks reliably and eventually ignores many magic-item restrictions. Thief begins at Rogue 3 and expands object use, climbing, stealth, and magic-item flexibility while keeping the base Rogue's precision damage, skills, mobility, and defensive progression. Full link: https://dnd-portal.com/faq/thief/what-is-the-thief-roguish-archetype/
What are the main Thief features?
Thief emphasizes speed, climbing, stealth, object use, and magic-item flexibility. Fast Hands expands Cunning Action into practical item and thieves' tool interactions, Second-Story Work improves climbing and jumping, Supreme Sneak rewards careful movement, Use Magic Device bypasses many item restrictions, and Thief's Reflexes gives an extraordinary first round.
Read more: Thief D&D Portal - What are the main Thief features? Thief FAQ Thief emphasizes speed, climbing, stealth, object use, and magic-item flexibility. Fast Hands expands Cunning Action into practical item and thieves' tool interactions, Second-Story Work improves climbing and jumping, Supreme Sneak rewards careful movement, Use Magic Device bypasses many item restrictions, and Thief's Reflexes gives an extraordinary first round. Full link: https://dnd-portal.com/faq/thief/what-are-the-main-thief-features/
How do you build and play a Thief Rogue?
Build the Thief on top of a normal Dexterity-focused Rogue, then invest in the secondary abilities and skills that support the archetype. Use the environment. The Thief gains the most when there are doors, traps, locks, elevation, objects, equipment and terrain to exploit. Fast Hands can free the normal action for an attack while the bonus action handles a practical interaction that would normally consume an action.
Read more: Thief D&D Portal - How do you build and play a Thief Rogue? Thief FAQ Build the Thief on top of a normal Dexterity-focused Rogue, then invest in the secondary abilities and skills that support the archetype. Use the environment. The Thief gains the most when there are doors, traps, locks, elevation, objects, equipment and terrain to exploit. Fast Hands can free the normal action for an attack while the bonus action handles a practical interaction that would normally consume an action. Full link: https://dnd-portal.com/faq/thief/how-do-you-build-and-play-a-thief-rogue/
How does Thief interact with Sneak Attack?
Thief does not add a new Sneak Attack condition. Its advantage comes from positioning and action economy: climbing, stealth and Fast Hands can help create a strong firing or melee position while leaving the action free for the qualifying Sneak Attack weapon attack.
Read more: Thief D&D Portal - How does Thief interact with Sneak Attack? Thief FAQ Thief does not add a new Sneak Attack condition. Its advantage comes from positioning and action economy: climbing, stealth and Fast Hands can help create a strong firing or melee position while leaving the action free for the qualifying Sneak Attack weapon attack. Full link: https://dnd-portal.com/faq/thief/how-does-thief-interact-with-sneak-attack/
What can Fast Hands do in the 2014 rules?
Fast Hands expands Cunning Action so the Thief can use a bonus action for a Dexterity (Sleight of Hand) check, thieves' tools to disarm a trap or open a lock, or the 2014 Use an Object action. It does not automatically allow every action involving an object or magic item as a bonus action.
Read more: Thief D&D Portal - What can Fast Hands do in the 2014 rules? Thief FAQ Fast Hands expands Cunning Action so the Thief can use a bonus action for a Dexterity (Sleight of Hand) check, thieves' tools to disarm a trap or open a lock, or the 2014 Use an Object action. It does not automatically allow every action involving an object or magic item as a bonus action. Full link: https://dnd-portal.com/faq/thief/what-can-fast-hands-do-in-the-2014-rules/