@pi-unipi/utility

Environment info, diagnostics, cleanup, name badge, and diff rendering. The grab-bag package for maintaining your development environment and making tool output readable.

The diff rendering is the standout feature — Shiki-powered syntax-highlighted diffs for write and edit tool output. Side-by-side view for edits, unified view for writes, with color presets and auto-fallback on narrow terminals.

Commands

| Command | Description | |---------|-------------| | /unipi:env | Show environment info (Node, Pi, OS, paths) | | /unipi:doctor | Run diagnostics across all modules | | /unipi:status | Show status of all unipi modules | | /unipi:cleanup | Clean stale DBs, temp files, old sessions | | /unipi:reload | Explain how to reload extensions | | /unipi:name-badge | Toggle name badge overlay | | /unipi:badge-gen | Generate session name via LLM and enable badge | | /unipi:util-settings | Unified settings for badge and diff rendering |

Examples

/unipi:env                 # Show environment
/unipi:doctor              # Run diagnostics
/unipi:cleanup             # Clean stale files
/unipi:cleanup --dry-run   # Preview what would be cleaned
/unipi:name-badge          # Toggle the session name badge
/unipi:badge-gen           # Generate a session name via LLM

Special Triggers

Utility registers with the info-screen dashboard, showing module status and diagnostic results. The footer subscribes to utility events for its extension status segment.

The diff rendering feature wraps Pi's built-in write and edit tools. When enabled, these tools show syntax-highlighted diffs instead of plain output. This is a transparent replacement — the agent doesn't need to know about it.

Agent Tools

| Tool | Description | |------|-------------| | ctx_batch | Atomic batch execution with rollback support | | ctx_env | Environment inspection for debugging | | write | Write file with syntax-highlighted diff (when diff enabled) | | edit | Edit file with split/unified diff view (when diff enabled) |

Batch Execution

import { BatchBuilder } from "@pi-unipi/utility/tools/batch";

const report = await new BatchBuilder()
  .addCommand("search", { query: "refactor" })
  .addTool("memory_search", { query: "patterns" })
  .withOptions({ failFast: true, commandTimeoutMs: 30000 })
  .execute(myExecutor);

if (!report.success) {
  console.log("Failed:", report.results.find(r => !r.success)?.error);
}

Configurables

Diff Rendering

/unipi:util-settings        # Open unified settings TUI

Or edit .unipi/config/util-settings.json directly:

{
  "diff": {
    "enabled": true,
    "theme": "default",
    "shikiTheme": "github-dark",
    "splitMinWidth": 150
  }
}

| Setting | Default | Options | |---------|---------|---------| | enabled | true | true/false | | theme | "default" | default, midnight, subtle, neon | | shikiTheme | "github-dark" | github-dark, dracula, one-dark-pro, catppuccin-mocha, nord, tokyo-night | | splitMinWidth | 150 | Minimum terminal width for split view |

Environment variable overrides: DIFF_ADD_BG, DIFF_REM_BG, etc.

Features:

• Split view (side-by-side) for edit, auto-falls back to unified on narrow terminals
• Unified view (stacked) for write overwrites
• LRU cache (192 entries) for Shiki highlights
• Large diff fallback (skip highlighting above 80k chars)

Name Badge

The badge is a persistent HUD overlay in the top-right corner showing the current session name. It auto-restores visibility on session restart.

Programmatic API

| Module | Path | Description | |--------|------|-------------| | ProcessLifecycle | lifecycle/process | Parent PID polling, orphan detection, signal handlers | | cleanupStale | lifecycle/cleanup | Stale DB/temp/session/cache cleanup with dry-run | | TTLCache | cache/ttl-cache | Memory or SQLite-backed TTL cache | | AnalyticsCollector | analytics/collector | Privacy-respecting event collection with daily rollup | | runDiagnostics | diagnostics/engine | Cross-module health checks with plugin architecture | | detectCapabilities | display/capabilities | Terminal feature detection (color, Nerd Font, unicode) | | Width Utilities | display/width | ANSI-aware clamp, wrap, collapse, pad, center |

TTL Cache

import { TTLCache } from "@pi-unipi/utility/cache/ttl-cache";

const cache = new TTLCache({ defaultTtlMs: 60000 });
await cache.set("key", { data: "value" });
const value = await cache.get("key");

Terminal Capabilities

import { detectCapabilities, getIcon } from "@pi-unipi/utility/display/capabilities";

const caps = detectCapabilities();
console.log("Nerd Font:", caps.nerdFont);
console.log(getIcon("󰘳", "[OK]")); // Uses Nerd Font if available

Privacy

The analytics collector is privacy-respecting:

• No file contents recorded
• No sensitive data (API keys, tokens, passwords) — redacted automatically
• Strings truncated to 500 characters
• All data stays local

License

MIT