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fix(tui): Fix garbled output when content exceeds viewport
- Implemented new renderLineBased method that properly handles scrollback boundaries - Fixed ANSI code preservation in MarkdownComponent line wrapping - Added comprehensive test to reproduce and verify the fix - Root cause: PARTIAL rendering strategy couldn't position cursor in scrollback - Solution: Component-agnostic line comparison with proper viewport boundary handling
This commit is contained in:
Mario Zechner
parent
1d9b77298c
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6e40c5d761
6 changed files with 485 additions and 106 deletions
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- agent/tui: interrupting requests to model via ESC doesn't work. Interrupting bash tool works.
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- agent/tui: "read all README.md files except in node_modules", gpt-5. wait for completion, then send a new message. Getting garbled output. this happens for both of the renderDifferential and renderDifferentialSurgical methods. We need to emiulate this in a test and get to the bottom of it.
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```markdown
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>> pi interactive chat <<<
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Press Escape to interrupt while processing
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Press CTRL+C to clear the text editorM deployments and building AI agents.peScript API)
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Press CTRL+C twice quickly to exitdeterministic programs (via JSON mode in any language or the
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## PackagesAPI)
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[user]iding your own system prompts and tools
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read all README.md files except in node_modulesrminal UI library with differential rendering
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- **[@mariozechner/pi-agent](packages/agent)** - General-purpose agent with tool calling and session
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[assistant]re lines)
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[tool] glob({"pattern":"**/README.md"}) - CLI for managing vLLM deployments on GPU pods
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README.mdad({"path": "packages/pods/README.md"})
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node_modules/@biomejs/biome/README.md
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node_modules/@esbuild/darwin-arm64/README.md
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node_modules/@types/node/README.mdnt/README.md"}) vLLM configuration for agentic workloads.
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node_modules/@xterm/headless/README.md
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node_modules/@xterm/xterm/README.md
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node_modules/chalk/readme.md tool calling and session persistence, modeled after Claude Code but
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node_modules/esbuild/README.md. It comes with a built-in TUI (also modeled after Claude Code) for
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node_modules/fsevents/README.md
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node_modules/get-tsconfig/README.md
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... (59 more lines)ned to be easy:
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- Writing custom UIs on top of it (via JSON mode in any language or the TypeScript API)
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[tool] read({"path": "README.md"})deterministic programs (via JSON mode in any language or the
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# Pi MonorepoI)ath": "packages/tui/README.md"})
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- Providing your own system prompts and tools
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A collection of tools for managing LLM deployments and building AI agents.
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Terminal UI framework with surgical differential rendering for building flicker-free interactive CLI
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## Packagesre lines)
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- **[@mariozechner/pi-tui](packages/tui)** - Terminal UI library with differential rendering
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- **[@mariozechner/pi-agent](packages/agent)** - General-purpose agent with tool calling and session
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persistencel Differential Rendering**: Three-strategy system that minimizes redraws to 1-2 lines for
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- **[@mariozechner/pi](packages/pods)** - CLI for managing vLLM deployments on GPU podsads.
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- **Scrollback Buffer Preservation**: Correctly maintains terminal history when content exceeds
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... (76 more lines)
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- **Zero Flicker**: Components like text editors remain perfectly still while other parts update
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[tool] read({"path": "packages/agent/README.md"})tocomplete, selection lists, markdown rendering
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# pi-agentl -g @mariozechner/pi
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```
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A general-purpose agent with tool calling and session persistence, modeled after Claude Code but
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extremely hackable and minimal. It comes with a built-in TUI (also modeled after Claude Code) for────╮
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interactive use. │
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[tool] read({"path": "packages/tui/README.md"})──────────────────────────────────────────────────────╯
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Everything is designed to be easy:
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- Writing custom UIs on top of it (via JSON mode in any language or the TypeScript API)
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- Using it for inference steps in deterministic programs (via JSON mode in any language or theve CLI
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TypeScript API)
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- Providing your own system prompts and tools
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- Working with various LLM providers or self-hosted LLMs
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... (422 more lines)ntial Rendering**: Three-strategy system that minimizes redraws to 1-2 lines for
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typical updates
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[tool] read({"path": "packages/pods/README.md"})maintains terminal history when content exceeds
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# piport
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- **Zero Flicker**: Components like text editors remain perfectly still while other parts update
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Deploy and manage LLMs on GPU pods with automatic vLLM configuration for agentic workloads.ering
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... (570 more lines)
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## Installation
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[user]
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```bash
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npm install -g @mariozechner/pi
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```sistant]
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⠴ Thinking...
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... (501 more lines)
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[tool] read({"path": "packages/tui/README.md"})──────────────────────────────────────────────────────╮
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# @mariozechner/pi-tui │
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╰────────────────────────────────────────────────────────────────────────────────────────────────────╯
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Terminal UI framework with surgical differential rendering for building flicker-free interactive CLI
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applications.
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## Features
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- **Surgical Differential Rendering**: Three-strategy system that minimizes redraws to 1-2 lines for
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typical updates
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- **Scrollback Buffer Preservation**: Correctly maintains terminal history when content exceeds
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viewport
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- **Zero Flicker**: Components like text editors remain perfectly still while other parts update
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- **Interactive Components**: Text editor with autocomplete, selection lists, markdown rendering
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... (570 more lines)
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[user]
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l
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[assistant]
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Do you want me to list the current directory contents? If yes, should I include hidden files and subdir
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ectories?
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╭────────────────────────────────────────────────────────────────────────────────────────────────────╮
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│ > │
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╰────────────────────────────────────────────────────────────────────────────────────────────────────╯
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↑14,783 ↓160 ⚡128 ⚒ 5
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```
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- pods: pi start outputs all models that can be run on the pod. however, it doesn't check the vllm version. e.g. gpt-oss can only run via vllm+gpt-oss. glm4.5 can only run on vllm nightly.
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- agent: improve reasoning section in README.md
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