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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98 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

    MCP
    Active

    Persistent memory + security layer for Claude Code (MCP plugin). Agents remember your project across sessions (~87% fewer context tokens), every tool call lands in a tamper-evident HMAC audit chain, and skills are AST-scanned +…

    TypeScriptLicense: MIT
    • agent-security
    • ai-agent-memory
    • ai-agents
    • audit-trail
    • claude-code

    githubmeasured growthOpen source ↗

    8GitHub starsstable
  2. 2

    Skill
    Active

    🪒 YAGNI enforcement at the harness level, nudges toward the simplest solution and gates against unnecessary dependencies, file sprawl, and unchecked build growth.

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

    githubmeasured growthOpen source ↗

    Install /plugin marketplace add V-Songbird/razor

    8GitHub stars+1 (+14.3 %)
  3. 3

    Skill
    Active

    Local-first memory and prompt-cache layer for Claude Code

    TypeScriptLicense: MIT
    • agentic-ai
    • agentic-coding
    • ai
    • ai-agents
    • anthropic

    githubmeasured growthOpen source ↗

    Install /plugin marketplace add riz007/somtum

    7GitHub starsstable
  4. 4

    Skill
    Active

    A production-ready Claude Code setup. Global CLAUDE.md, coding rules, per-project memory, and token optimization.

    ShellLicense: MIT
    • ai-agents
    • claude
    • claude-code
    • claude-code-plugin
    • context-engineering

    githubmeasured growthOpen source ↗

    Install /plugin marketplace add janmaaarc/basecamp

    7GitHub starsstable
  5. 5

    Skill
    Active

    A Claude Code hook that routes each Read on a PDF to the path that actually works: text layer to UTF-8 text, scans to vision, and neither one through poppler.

    PythonLicense: MIT
    • claude-code
    • claude-code-hooks
    • claude-code-plugin
    • pdf
    • poppler

    githubmeasured growthOpen source ↗

    Install /plugin marketplace add WatsonTsai/pdf-text-router

    7GitHub starsstable
  6. 6

    MCP
    Active

    Lossless context compression: 2-8x fewer tokens, byte-exact recovery, search inside payloads

    PythonLicense: MIT

      mcpmeasured growthOpen source ↗

      Install claude mcp add densely -- uvx densely

      6GitHub starsstable
    • 7

      Skill
      Active

      Resume Claude Code work after rate/usage/context limits without replaying the prior transcript. Auto-saves at 90%/95% usage. Plugin-installable, 10 languages.

      PowerShellLicense: MIT
      • checkpoint
      • claude-code
      • claude-code-plugin
      • claude-code-skills
      • context

      githubmeasured growthOpen source ↗

      Install /plugin marketplace add sofumel/claude-handoff-revive

      6GitHub starsstable
    • 8

      Skill
      Dormant

      Claude Code plugin — inventory all your installed skills, check structure, and find updates. Free, zero dependencies.

      JavaScriptLicense: MIT
      • ai-tools
      • anthropic
      • audit
      • claude
      • claude-code

      githubmeasured growthOpen source ↗

      Install /plugin marketplace add VersoXBT/skill-manager

      6GitHub starsstable
    • 9

      Skill
      Active

      Automatically detect and disable irrelevant Claude Code skills per project to save tokens and streamline your tech workflow.

      PythonLicense: MIT
      • agents
      • ai-agents
      • antigravity
      • claude
      • claude-code-plugins

      githubmeasured growthOpen source ↗

      Install git clone https://github.com/mrdenox109-nyx/skill-manager ~/.claude/skills/skill-manager

      5GitHub starsstable
    • 10

      Skill
      Active

      Profile Claude Code context, discover repeated workflows, and regression-test your skills. Local-only, zero-dependency.

      PythonLicense: MIT
      • agent-skills
      • anthropic
      • claude-code
      • claude-code-plugin
      • claude-code-plugins

      githubmeasured growthOpen source ↗

      Install /plugin marketplace add nks0614/harnessay

      5GitHub stars+2 (+66.7 %)
    • 11

      MCP
      Dormant

      Save tokens while coding — your AI agent gets structured code context, not file dumps.

      ↓ 67 downloads/weekTypeScriptLicense: Apache-2.0

        mcpmeasured growthOpen source ↗

        Install claude mcp add codeweave -- npx @codeweave/mcp

        4GitHub starsstable
      • 12

        MCP
        Active

        Compact, source-linked context packs that reduce token waste for coding agents.

        TypeScriptLicense: MIT

          mcpmeasured growthOpen source ↗

          Install claude mcp add capsule -- npx capsulectx

          4GitHub starsstable
        • 13

          MCP
          Active

          Reduces AI agent token usage by 90% via context compression and task checkpoint persistence.

          ↓ 98 downloads/weekJavaScriptLicense: MIT

            mcpmeasured growthOpen source ↗

            Install claude mcp add smart-context-mcp -- npx smart-context-mcp

            4GitHub starsstable
          • 14

            Skill
            Active

            20 power-user skills for Claude Code: session memory and consolidation, context compression, multi-agent orchestration, adversarial bug hunting, security review, calibrated estimation and decision archaeology. Drop-in SKILL.md files. Built…

            License: MIT
            • agent-skills
            • ai-agent
            • ai-coding
            • ai-developer-tools
            • ai-workflow

            githubmeasured growthOpen source ↗

            Install git clone https://github.com/irfad7/claude-power-skills ~/.claude/skills/claude-power-skills

            4GitHub starsstable
          • 15

            Skill
            Active

            The Agent Knowledge Kit & Architecture System — 10–32x token-efficient architecture discovery for AI coding agents

            TypeScript
            • agentic-ai
            • ai-agents
            • antigravity
            • bun
            • claude-code

            githubestimated momentumOpen source ↗

            Install git clone https://github.com/chama-x/quiv ~/.claude/skills/quiv

            3GitHub stars—
          • 16

            Agent
            Active

            Agent context compressor and memory persistent orchestration

            TypeScriptLicense: Apache-2.0
            • a2a-protocol
            • agent-framework
            • ai
            • ai-agents-framework
            • ai-tools

            githubmeasured growthOpen source ↗

            2GitHub starsstable
          • 17

            Other
            Active

            Turn your strongest model into a conductor: route each step to the cheapest capable model, and escalate only load-bearing pieces to a pricier reviewer that catches pitfalls early. Subscription, API, or hybrid.

            ShellLicense: MIT
            • ai-coding
            • claude
            • claude-code
            • claude-code-skill
            • cost-reduction

            githubmeasured growthOpen source ↗

            2GitHub starsstable
          • 18

            Skill
            Active

            Claude Code skill: caveman-style token efficiency, spoken with a real Spanish regional accent

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

            githubmeasured growthOpen source ↗

            Install /plugin marketplace add Mun1to/SpanishCaveMan

            2GitHub starsstable
          • 19

            MCP
            Active

            Cut vision-LLM token costs by snapping images to tile boundaries — Claude, GPT, Gemini, Llama, Qwen

            ↓ 53 downloads/weekRustLicense: NOASSERTION

              mcpmeasured growthOpen source ↗

              Install claude mcp add vision-squeezer -- npx vision-squeezer

              2GitHub starsstable
            • 20

              Other
              Active

              Claude Code skill: reduce token usage 60-80% — targeted reads, model switching, context management. One-line install.

              License: MIT
              • ai-tools
              • claude-code
              • claude-code-skill
              • llm
              • productivity

              githubmeasured growthOpen source ↗

              2GitHub starsstable
            • 21

              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 %)
              • 22

                Other
                Dormant

                Translate any language to English before Claude processes it. ~49% token savings combined with caveman.

                PythonLicense: MIT
                • claude-code
                • claude-code-skill
                • developer-tools
                • llm
                • multilingual

                githubmeasured growthOpen source ↗

                2GitHub starsstable
              • 23

                Skill
                Active

                A Claude Code plugin that shows exactly where your AI coding session wasted tokens — and how to fix it. Flags waste, never quality. Runs locally.

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

                githubmeasured growthOpen source ↗

                Install /plugin marketplace add Jimmynycu/token-efficiency

                2GitHub starsstable
              • 24

                MCP
                Active

                Token cost math for LLM API calls: verified per-1M-token rates for 69 models, 17 providers.

                ↓ 27 downloads/weekJavaScriptLicense: MIT

                  mcpmeasured growthOpen source ↗

                  Install claude mcp add comparedge-llm-cost -- npx @comparedge/llm-cost-mcp

                  2GitHub 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

                  mcp-agent-skills-hub

                  MCP
                  ActiveOpen source ↗

                  Molavi Agent Skills: Curated AI agent skills and MCP configs for Antigravity, Cursor, Codex & Claude — by Taghi Molavi

                  JavaScriptLicense: MIT
                  • agentic-workflows
                  • ai-agents
                  • ai-skills
                  • antigravity
                  • awesome-list
                  githubResourcemeasured growth
                  8GitHub starsstable