Prompt Studio v1.0 is live on PyPI · pip install promptstudio-ai
/LEAN [X 08.4, Y 12.6]

The persona layer your agent already speaks.

One SKILL.md. Filtered per intensity by get_lean_instructions(mode) and injected in the system slot by per-provider adapters with Anthropic prompt-cache markers. Cuts LLM output size, cost, and latency · measured, not implied.

[X 08.4, Y 12.6]
/L.01 One source of truth

skills/lean/SKILL.md · read once, shipped everywhere

The plugin, MCP server, benchmark arms, and FastAPI adapters all read the same file. Bump it once · everything downstream picks it up. The system slot is marked cache_control: ephemeral, so the persona charges once per Anthropic prompt-cache TTL, not per turn.

build_messages.pyPython
/L.02 Intensity
Three payloads, one file.
lite
Minimum payload · small models, tight context, cost-sensitive calls.
full
Default · production balance of guidance and payload.
ultra
Maximum guidance · long agentic sessions with over-build risk.
/L.03 Hosts
Ships across every major agent host.
CLAUDE CODE
installshell
1/plugin install prompt-studio@prompt-studio
CODEX
installshell
1codex plugin add prompt-studio@prompt-studio
GitHub Copilot CLI
Plugin · copilot plugin install prompt-studio@prompt-studio · hooks/copilot-hooks.json
Devin CLI
Plugin · devin plugins install utk2103/Prompt-Studio
Qoder
Reference template · hooks/qoder-hooks.json → .qoder/settings.json
Cursor / Windsurf / Cline / Kiro / Zed
Rules file · .cursor + .windsurf/rules/lean.md
Gemini CLI
Extension · gemini-extension.json
JetBrains / VS Code Copilot Chat / Amp / Jules / CodeWhale / Antigravity
AGENTS.md at repo root
MCP server →Install
/L.04 Commands
Eight slash commands, one persona.
/prompt-studio:lean
lite | full | ultra — the lazy-senior-dev mode itself
/prompt-studio:compress
Compress a memory file (CLAUDE.md, todos) into Lean shorthand
/prompt-studio:lean-stats
Real per-session token usage from the transcript
/prompt-studio:lean-debt
Harvest lean: comments into a tracked debt ledger
/prompt-studio:lean-review
Review a diff for over-engineering only
/prompt-studio:lean-audit
Whole-repo over-engineering audit
/prompt-studio:lean-gain
Measured impact scoreboard — less code, more speed
/prompt-studio:lean-help
Quick-reference card for all Lean commands
Optional statusline: point statusLine.command at hooks/lean-statusline.sh to show the active level.