Principle: System prompts provide tool access and safety rails. CLAUDE.md/AGENTS.md provide workflow and conventions. Inspired by Pi's context engineering.

23 files changed, -47k chars (~10% of total), targeting the verbose files that override CLAUDE.md. Some tools were converted to stubs and moved to skills

Quick start

# 1. Clone into ~/.tweakcc
git clone https://github.com/wassname/tweakcc-minimal ~/.tweakcc

# 2. Backup, patch in place, save patched copy
VERSION=$(claude --version | head -1 | cut -d' ' -f1)
BINARY=~/.local/share/claude/versions/$VERSION
cp "$BINARY" ~/.tweakcc/native-binary.backup          # unpatched backup
npx tweakcc --apply                                    # patches $BINARY in place
cp "$BINARY" ~/.local/share/claude/versions/${VERSION}-min  # save as -min
cp ~/.tweakcc/native-binary.backup "$BINARY"          # restore stock binary

# 3. Create symlinks so both versions coexist
ln -sf ~/.local/share/claude/versions/${VERSION}-min ~/.local/bin/claude-mn  # patched
# claude symlink already points to $VERSION (stock, now restored)


# 4.Install skills (optional, some tools converted to stub+skills)
mkdir -p ~/.claude/skills
ln -s $PWD/skills/* ~/.claude/skills

Now claude = stock, claude-mn = minimal prompts.

Re-apply after edits

Edit .md files in system-prompts/, then:

VERSION=$(claude --version | head -1 | cut -d' ' -f1)
cp ~/.tweakcc/native-binary.backup ~/.local/share/claude/versions/${VERSION}-min
npx tweakcc --apply

Disable auto-updates

CC auto-updates overwrite patched binaries:

// ~/.claude/settings.json
{ "autoUpdates": false }

Or via env in ~/.claude/settings.json:

{ "env": { "DISABLE_AUTOUPDATER": "1" } }

Key files to edit

File	Controls
`system-reminder-plan-mode-is-active-5-phase.md`	Plan mode workflow (was overriding CLAUDE.md)
`system-reminder-plan-mode-is-active-iterative.md`	Iterative plan mode variant
`system-prompt-main-system-prompt.md`	Role definition, ~10 lines
`system-prompt-doing-tasks.md`	Task execution rules + tool hints
`system-prompt-tone-and-style.md`	Output style
`system-prompt-tool-usage-policy.md`	Parallel calls, tool preferences
`system-prompt-hooks-configuration.md`	Hook event definitions (don't drop events)

~200 files untouched (already 6-8 lines, tool descriptions, agent/skill prompts loaded on-demand).

What changed

File	Before	After	Notes
plan-mode-5-phase	90	20	Defers to CLAUDE.md for workflow
plan-mode-iterative	61	18	Same
main-system-prompt	17	10	Pi-style minimal
doing-tasks	18	7	"Read first, follow CLAUDE.md"
learning-mode	80	11	Kept core, cut examples
insights-* (5 files)	170	45	Kept JSON schema, cut examples
hooks-configuration	163	33	Kept structure + all events, cut examples
mcp-cli	124	25	Kept commands, cut 6x repeated examples

README.md

tweakcc-minimal

Quick start

Re-apply after edits

Disable auto-updates

Key files to edit

What changed

Links