llms.txt git:20260520.99db48bA

Immutable. This exact content never changes and is served at /api/v1/blob/50c7104bcbab71dd.

# claude-code-upgrader

> The only Claude Code plugin built from CC source code analysis. 45% cost reduction measured on real workloads.

## What it does

claude-code-upgrader automatically reduces Claude Code API costs by preventing cache expiry waste, delegating work to cheaper SubTask sessions, and providing real-time cost visibility. Works with both Max Plan ($200/mo subscribers) and API pay-per-use billing.

## Key features

- Token Guardian: Detects prompt cache expiry and blocks $9 re-sends before they happen
- Session Architect: Auto-delegates heavy work to SubTasks with 37.5% cheaper cache writes
- Concise Mode: Reduces output token padding while preserving substance
- /continue: Replaces /compact with zero-cost, zero-information-loss context restoration (processes 60MB+ in <1s)
- Status Line: Real-time cost/context/rate-limit monitoring at <50ms overhead
- /usage-view: Interactive HTML dashboard with AI-powered cost analysis in 23 languages
- /setup-git-lite: Removes 2,200 hidden tokens CC silently injects every session (~$48/mo saved)

## Measured impact

- $326/day → $180/day (45% reduction) on full-day coding workload
- Cache expiry prevention: $9 saved per catch, ~$270/mo at daily frequency
- Git instruction optimization: ~$48/mo saved
- Plugin overhead: ~1,400 tokens/session ($0.07 per 100-call session)
- Net effect with git-lite: plugin consumes less than it removes

## Technical approach

Built by analyzing Claude Code source code (v2.1.88):
- Traced token injection to context.ts:36-111 (gitStatus) and tools/BashTool/prompt.ts:53 (commit instructions)
- Identified cache structure paths in utils/api.ts:321 (splitSysPromptPrefix)
- Mapped three cache invalidation paths (MCP active, no MCP, 3P provider)

## Installation

```
/plugin marketplace add ww-w-ai/marketplace
/plugin install claude-code-upgrader@ww-w-ai
```

## Links

- Source: https://github.com/ww-w-ai/claude-code-upgrader
- License: Apache-2.0
- Languages: 23 (auto-detected from OS locale)