CL - twofold

Compaction Lines - twofold (2F, sl).

Inspired by cc-sl, gemma4-fast-sonnet.

---

What It Does

Switches LLM's response style to brief, concise communication. Articles gone. Filler gone. Hedging gone. Technical substance stays intact. Code blocks and error messages always quoted exactly.

Usefulness: cuts collectively tokens out 50%-90%

kind of x2 your session time until reaching compaction/limitation, not to mention concentration time.

---

Skill Installation

Copy the whole "twofold" folder which contains "SKILL.md" to your LLM CLI config skills folder.

• Claude Code (project): .claude/skills , e.g. cp -r skills/twofold .claude/skills/
• Claude Code (user): ~/.claude/skills , e.g. cp -r skills/twofold ~/.claude/skills/

Then /reload-plugins , or restart the session.

Alternatively:

• (ClaudeCode et al) NPX: npx skills add ducquoc-gft/twofold

---

Trigger Phrases

• /twofold
• twofold mode
• use twofold
• /2f
• 2f mode
• use 2f
• /sl
• sl mode
• use sl
• be brief
• trả lời ngắn
• shorthand longform
• simple lengthy

---

Intensity Levels

Switch anytime with /twofold <level>. Default is long.

Level	Style
short	No filler or hedging. Articles and full sentences kept. Professional but tight.
long	Drop articles. Fragments OK. Short synonyms. Classic brief.
cc	ConCise frugal. Abbreviate everything (DB/auth/fn/req/res). Arrows for causality. One word when one word enough.

---

Quick Example

Prompt: "What is frugal?"

Normal response:

Frugal means being careful and economical with resources — spending or using as little as possible without waste.

In everyday usage: avoiding unnecessary expense, getting good value, not being extravagant.

Distinct from cheap: frugal is deliberate and principled; cheap implies low quality or unwillingness to spend even when warranted.

Level	Response	Words	Tokens	% shorter
short	"Frugal means using the minimum resources needed to achieve a goal, with no waste."	15	17	79%
long	"Min resources, max output. No waste."	6	9	89%
cc	"Min res → max output. No waste."	6	8	90%

"What is Kakeibo?"

Level	Response
short	"Kakeibo is a Japanese budgeting method focused on mindful spending. You write down income, expenses, and savings goals by hand, then reflect on your habits each month. The act of writing — not apps — is the point."
long	"Japanese budgeting method. Write income/expenses by hand, reflect monthly. Idea: mindfulness through pen-and-paper. 4 questions each month: how much earned, how much spent, how much saved, how to improve."
cc	"JP budgeting. Hand-write income/expenses. Monthly reflect. Mindfulness > apps. 4Q: earned? spent? saved? improve?"

(link)

---

Auto-Clarity Exceptions

twofold mode pauses automatically for:

• Security warnings
• Irreversible or destructive action confirmations
• Multi-step sequences where fragment order risks misread
• Situations where the user is confused

Normal twofold resumes immediately after the critical part.

---

Boundaries

• Code, commits, and PRs: always written normally regardless of level.
• Level persists across the session until changed.
• stop twofold or stop 2f or stop sl or normal mode exits twofold entirely.