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.

Use case

Activity

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50 entries in this view.

Tool ranking

Ranked by measured growth, normalized across sources. 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

    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 221GitHub stars+619 (+0.92 %)
  2. 2

    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 098GitHub stars+671 (+0.87 %)
  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 084GitHub stars+120 (+6.1 %)
  4. 4

    MCP
    Active

    Pay-per-call agent APIs over x402: web scraping, token compression, and semantic cache.

    JavaScriptLicense: MIT

      mcpmeasured growthOpen source ↗

      Install claude mcp add gate402-mcp -- npx gate402-mcp

      2GitHub stars+1 (+100.0 %)
    • 5

      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

      102GitHub stars+7 (+7.4 %)
    • 6

      Skill
      Active

      Staged context pruning for OpenCode, Oh My Pi, pi, and Claude Code.

      TypeScriptLicense: AGPL-3.0
      • ai
      • ai-agents
      • claude-code
      • claude-code-plugin
      • coding-agent

      githubmeasured growthOpen source ↗

      Install /plugin marketplace add AshishKumar4/better-compact

      12GitHub stars+2 (+20.0 %)
    • 7

      MCP
      Active

      Persistent memory for any AI — zero token cost until recall

      RustLicense: Apache-2.0

        mcpmeasured growthOpen source ↗

        44GitHub stars+3 (+7.3 %)
      • 8

        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

        45GitHub stars+3 (+7.1 %)
      • 9

        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 %)
        • 10

          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

          150GitHub stars+5 (+3.4 %)
        • 11

          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

          66GitHub stars+3 (+4.8 %)
        • 12

          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 ↗

          54GitHub stars+2 (+3.8 %)
        • 13

          Skill
          Active

          Claude Code plugin: Fable 5 as a token-frugal orchestrator with tiered Opus/Sonnet/Haiku agents

          HTMLLicense: MIT
          • anthropic
          • claude-code
          • claude-code-plugin
          • fable
          • hooks

          githubmeasured growthOpen source ↗

          Install /plugin marketplace add realgarit/fable-baton

          22GitHub stars+1 (+4.8 %)
        • 14

          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 %)
        • 15

          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 ↗

          430GitHub stars+3 (+0.70 %)
        • 16

          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

          332GitHub stars+2 (+0.61 %)
        • 17

          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 %)
        • 18

          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

          118GitHub stars+1 (+0.85 %)
        • 19

          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

          140GitHub stars+1 (+0.72 %)
        • 20

          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

          144GitHub stars+1 (+0.70 %)
        • 21

          MCP
          Active

          Pre-injection context compression for coding agents. Zero LLM calls, zero telemetry, offline-safe.

          RustLicense: NOASSERTION

            mcpmeasured growthOpen source ↗

            609GitHub starsstable
          • 22

            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
          • 23

            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

            githubmeasured growthOpen source ↗

            61GitHub starsstable
          • 24

            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

          Learning resources

          Ranked by measured growth, normalized across sources. 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+5 (+3.6 %)