Token efficiency: tools for developers

Tools that reduce token costs, compress context or cache LLM requests. An entry can appear under several use cases when its topics or description provide several explicit signals.

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44 entries in this view.

Tool ranking

Ranked by known GitHub stars, highest first; archived repositories come after maintained repositories. Raw values keep their source-specific window, shown under each tool; a change requires at least two snapshots from the last 7 days.

  1. 1

    CLI
    Active

    CLI proxy that reduces LLM token consumption by 60-90% on common dev commands. Single Rust binary, zero dependencies

    RustLicense: Apache-2.0
    • agentic-coding
    • ai-coding
    • anthropic
    • claude-code
    • cli

    githubmeasured growthOpen source ↗

    78 349GitHub stars+703 (+0.91 %)
  2. 2

    MCP
    Active

    Compress tool outputs, logs, files, and RAG chunks before they reach the LLM. 20% fewer tokens for coding agents, 60-95% fewer tokens for JSON, same answers. Library, proxy, MCP server.

    PythonLicense: Apache-2.0
    • agent
    • ai
    • anthropic
    • claude-code
    • compression

    githubmeasured growthOpen source ↗

    68 629GitHub stars+784 (+1.2 %)
  3. 3

    Other
    Active

    Find the ghost tokens. Fix them. Survive compaction. Avoid context quality decay.

    Python
    • agentskills
    • claude-code
    • claude-code-skill
    • claude-plugin
    • context-engineering

    githubmeasured growthOpen source ↗

    2 122GitHub stars+108 (+5.4 %)
  4. 4

    MCP
    Active

    Context engineering for AI agents. ~80% fewer tokens. Fix tool overload. Skills and memory with in-process BM25 and semantic retrieval. Progressive Disclosure. No vector DB.

    TypeScriptLicense: MIT
    • accuracy
    • agents
    • claude-skills
    • context
    • harness

    githubmeasured growthOpen source ↗

    433GitHub stars+5 (+1.2 %)
  5. 5

    Skill
    Active

    23 Claude Code plugins: TDD enforcement hooks, git/PR workflows, spec-driven development, code review, project lifecycle, fix-from-error, maintenance automation, context optimization, research, and multi-LLM delegation. 186 skills, 128…

    PythonLicense: MIT
    • ai-agents
    • architecture-patterns
    • awesome-claude-code
    • awesome-claude-skills
    • claude-agents

    githubmeasured growthOpen source ↗

    Install git clone https://github.com/athola/claude-night-market ~/.claude/skills/claude-night-market

    333GitHub stars+2 (+0.60 %)
  6. 6

    MCP
    Active

    MCP server and proxy that compresses LLM prompts, tool output, and replies to cut token cost.

    ↓ 171 downloads/weekRustLicense: MPL-2.0

      mcpmeasured growthOpen source ↗

      Install claude mcp add llmtrim -- npx @llmtrim/cli

      222GitHub stars+6 (+2.8 %)
    • 7

      Skill
      Active

      Governance framework for AI coding agents. It runs them through a five-step workflow (plan, build, review, test, ship) where no step counts as done without evidence. Drop-in rules and guardrails for Claude Code, Codex, Cursor, Copilot, and…

      PythonLicense: MIT
      • agent-framework
      • agent-orchestration
      • agentic-development
      • agents-md
      • ai-agent

      githubmeasured growthOpen source ↗

      Install git clone https://github.com/KbWen/agentic-os ~/.claude/skills/agentic-os

      155GitHub stars+8 (+5.4 %)
    • 8

      Skill
      Active

      Lossless context compression plugin for Claude Code & OpenCode.

      TypeScriptLicense: BSD-3-Clause
      • anthropic
      • chatgpt
      • claude
      • claude-code
      • claude-code-plugin

      githubmeasured growthOpen source ↗

      Install /plugin marketplace add aerovato/magic-compact

      146GitHub stars+1 (+0.69 %)
    • 9

      Skill
      Active

      Content-aware output compression for AI coding assistants. 36 specialized processors cut CLI output tokens by 60-99% (git, pytest, npm, terraform, kubectl, docker, and more) without losing errors, diffs, or stack traces.

      PythonLicense: Apache-2.0
      • agentic-ai
      • ai-coding-assistant
      • claude-code
      • claude-code-plugin
      • cli-tools

      githubmeasured growthOpen source ↗

      Install /plugin marketplace add ppgranger/token-saver

      142GitHub stars+2 (+1.4 %)
    • 10

      Skill
      Active

      Claude Code skill — delegate coding tasks to Mistral Vibe, supervise via git diff & save 50-90% Claude token usage

      Shell
      • claude
      • claude-ai
      • claude-ai-skills
      • claude-code
      • claude-skill

      githubmeasured growthOpen source ↗

      Install git clone https://github.com/pcx-wave/vibe-skill ~/.claude/skills/vibe-skill

      117GitHub starsstable
    • 11

      MCP
      Active

      Tinder for your Claude Code skills, subagents and MCP servers. Swipe away what wastes context, scan for prompt injection, get honest token costs. Fixes what it finds and actually deletes. Zero dependencies, Claude Code + Codex.

      ShellLicense: MIT
      • agent-skills
      • ai-agents
      • claude
      • claude-code
      • claude-code-marketplace

      githubmeasured growthOpen source ↗

      115GitHub stars+1 (+0.88 %)
    • 12

      Skill
      Active

      Claude Code plugin that tracks token usage, identifies wasted context, and saves 30-50% on API costs. Heatmaps, ROI reports, budget alerts, efficiency scores, git-aware suggestions — all local, zero config.

      JavaScriptLicense: MIT
      • ai-tools
      • anthropic
      • claude-code
      • claude-code-plugin
      • cli-plugin

      githubmeasured growthOpen source ↗

      Install /plugin marketplace add egorfedorov/claude-context-optimizer

      103GitHub stars+6 (+6.2 %)
    • 13

      Skill
      Active

      Agent Dashboard: Visualization and analytics for Sessions and Quota Usage. Track, analyze, and optimize token usage across providers with heatmaps, cost tracking, token counting and quota resets..

      PythonLicense: MIT
      • agent
      • analytics
      • anthropic
      • claude-code
      • claude-code-plugin

      githubmeasured growthOpen source ↗

      Install /plugin marketplace add JingbiaoMei/Tokdash

      67GitHub stars+3 (+4.7 %)
    • 14

      MCP
      Active

      Context compression plugin for Claude Code. Automatically trims large tool output—JSON, YAML, stack traces, and logs—before it enters the context window.

      TypeScriptLicense: MIT
      • claude-code
      • claude-code-plugin
      • context-compression
      • context-window
      • developer-tooling

      githubmeasured growthOpen source ↗

      64GitHub starsstable
    • 15

      Library
      Active

      A high-performance, ergonomic web framework for Rust with native AI/LLM support.

      RustLicense: Apache-2.0
      • ai-native
      • api-framework
      • async
      • backend
      • developer-tools

      githubestimated momentumOpen source ↗

      61GitHub stars—
    • 16

      MCP
      Active

      Cut context bloat in your AI-agent stack: find and safely prune unused skills, MCP servers and subagents from real transcript evidence

      GoLicense: MIT
      • agent-skills
      • ai-agents
      • anthropic
      • claude-code
      • claude-code-plugin

      githubmeasured growthOpen source ↗

      55GitHub stars+1 (+1.9 %)
    • 17

      Skill
      Active

      🤫 Token-lean sessions at the harness level. An easy to grasp output style, output-shrinking hooks, and log compression cut both input and output tokens.

      JavaScriptLicense: MIT
      • agent-skills
      • ai
      • anthropic
      • claude
      • claude-code

      githubmeasured growthOpen source ↗

      Install /plugin marketplace add V-Songbird/hush

      47GitHub stars+4 (+9.3 %)
    • 18

      MCP
      Active

      Persistent memory for any AI — zero token cost until recall

      RustLicense: Apache-2.0

        mcpmeasured growthOpen source ↗

        44GitHub stars+3 (+7.3 %)
      • 19

        Skill
        Active

        Eco mode for Claude Code. /eco: -31% to -73% output tokens with critical findings intact; /eco-max: up to -75% with lowered effort. Measured hardest on Claude Fable 5 (fable5), deep-studied on Sonnet 5, works on Opus 4.8 too. We publish our…

        JavaScriptLicense: MIT
        • ai-agents
        • anthropic
        • claude
        • claude-ai
        • claude-code

        githubmeasured growthOpen source ↗

        Install /plugin marketplace add sup3x/claude-code-eco

        33GitHub starsstable
      • 20

        Skill
        Active

        Rolling context compression for Claude Code — never hit the context wall. Auto-compresses old messages while keeping recent context verbatim. Zero config, zero latency. Works as a Claude Code plugin.

        PythonLicense: MIT
        • ai-agent
        • ai-coding
        • anthropic
        • claude
        • claude-code

        githubmeasured growthOpen source ↗

        Install /plugin marketplace add NodeNestor/claude-rolling-context

        31GitHub stars+1 (+3.3 %)
      • 21

        Skill
        Active

        Restore prior Claude Code AND Codex sessions with zero LLM calls. Cross-tool session handoff, cache-expiry prevention, real cost dashboard. One plugin, both hosts.

        JavaScriptLicense: Apache-2.0
        • anthropic-api
        • api-cost
        • billing-analytics
        • cache-management
        • claude-code

        githubmeasured growthOpen source ↗

        Install /plugin marketplace add ww-w-ai/super-token-saver

        31GitHub starsstable
      • 22

        Skill
        Active

        Token-efficient Claude Code workspace with parallel agents and persistent memory. Research → Plan → Implement → Validate workflow.

        JavaScript
        • agent-memory
        • agentic-coding
        • ai-agents
        • ai-coding
        • claude-code-commands

        githubmeasured growthOpen source ↗

        Install /plugin marketplace add coalesce-labs/catalyst

        20GitHub starsstable
      • 23

        MCP
        Active

        A MCP that turns PDFs into structured text, tables, figures, metadata, annotations, and page-level evidence for selective retrieval by MCP-compatible AI agents. Improves the information quality AI agents receive while also reducing token…

        JavaScriptLicense: AGPL-3.0
        • ai
        • ai-tools
        • claude
        • claude-code
        • claude-code-plugin

        githubmeasured growthOpen source ↗

        17GitHub starsstable
      • 24

        Agent
        Active

        Control plane for AI coding agents: route tasks, reduce token spend, run multi-agent workflows, fallback executors, and track cost per task.

        PythonLicense: Apache-2.0
        • a2a
        • ag-ui
        • agentic-ai
        • ai-agents
        • ai-coding

        githubmeasured growthOpen source ↗

        16GitHub starsstable

      Learning resources

      Ranked by known GitHub stars, highest first; archived repositories come after maintained repositories. These resources remain available separately and do not take part in the main tool ranking.

      1. 1

        outsourcerer

        Skill
        ActiveOpen source ↗

        Make the most out of your subscriptions. Delegate work to other harnesses and models, while keeping your main session the orchestrator. Nothing new to learn. Keep working like you do, but better.

        Shell
        • agent-skills
        • agentic-workflow
        • claude-code
        • codex
        • fable
        github

        Install git clone https://github.com/alexgreensh/outsourcerer ~/.claude/skills/outsourcerer

        Resourcemeasured growth
        142GitHub stars+3 (+2.2 %)