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Alternatives · Memory & Evals

book-to-skill alternatives (2026)

book-to-skill: MIT book→skill converter. Excellent for private grounded skills; keep copyrighted sources offline and private.

Its Catch: Vs Skillbox and Claude Code Templates: this generates content skills from documents, not a self-hosted skills registry/MCP plane and not a catalog of Claude Code agents/hooks/MCPs.

Below: 8 free or free-tier tools from the same category (agent memory tools), free and open source first, then the closest match by shared tags. Each keeps its own Catch.

  1. 1.agentsviewMIT local-first agent session/cost archive — 20+ coding agents

    Free / OSS · OSS/MIT · 6.2k GitHub stars

    VerdictMIT local agent archive. Session/cost on disk; not Langfuse/Braintrust cloud.

    CatchVs Langfuse / Braintrust (cloud LLM observability): agentsview is a local session/cost archive for coding-agent transcripts, not a hosted tracing/eval platform. Optional anonymous telemetry ping; you still need the agent logs on disk. Not a replacement for production OpenTelemetry of your app’s LLM calls.

  2. 2.EngramMIT persistent agent memory — MCP, CLI, TUI, SQLite

    Free / OSS · OSS/MIT · 7.4k GitHub stars

    VerdictMIT agent memory primitive. MCP/CLI/TUI on SQLite; not a full agent framework.

    CatchVs Mem0 / Letta / full agent frameworks: Engram is the memory primitive (store + retrieve + surfaces), not an orchestration framework or coding agent. “local or cloud” branding means optional hosted/sync gravity — day-one stays OSS you run. You still decide what gets written and when.

  3. 3.oh-my-hermesMIT Hermes-agent niche tooling — memory & workflows

    Free / OSS · OSS/MIT · 3.4k GitHub stars

    VerdictMIT Hermes-agent tooling. Niche, not a multi-host skill pack.

    CatchHermes-specific — not a generic Claude Code / Codex skill pack. Young surface; expect Hermes Agent as the host and follow upstream Hermes breaking changes. Vs ECC (multi-host ecosystem) and security-audit-skill (Cloudflare audit skill): oh-my-hermes is niche Hermes tooling, not a cross-harness coordination layer or a security scanner.

  4. 4.FridaySelf-hosted cognitive memory MCP for coding agents

    Free / OSS · OSS/MIT · 68 GitHub stars

    VerdictMIT self-hosted memory MCP. Use when coding agents need durable local memory without Mem0 Cloud.

    CatchVs Mem0 / Letta / Graphiti: Friday is the self-hosted MCP memory appliance for coding agents, not a multi-tenant memory API or a full agent OS. You operate Neo4j/Compose and embedding/model keys; star count is still early — pin and verify before production trust.

  5. 5.AX CheckHosted free agent-experience checklist + recorded coding-agent sessions

    Free / OSS · OSS/MIT

    VerdictFree hosted AX smoke test. Grades how agents use your product, not how good your model is.

    CatchGrades are provisional and technical-only — treat the report as a useful first pass, not a product-wide quality certificate. Vs Promptfoo / DeepEval: AX Check grades product AX (docs, CLI, MCP, SDK), not model quality, eval scores, or safety behavior. Hosted free is convenient; verify the session evidence and rerun after interface changes.

  6. 6.OpenVikingAGPL self-evolving context database for memory, RAG, and skills

    Free / OSS · AGPL-3.0 · 40.3k GitHub stars

    VerdictAGPL-3.0 self-evolving context DB. Broad memory/RAG/skills surface; network copyleft is a deployment decision, not a footnote.

    CatchAGPL-3.0 is strong copyleft, including the network-copyleft boundary when you modify OpenViking and offer it as a service. Get legal review before exposing a modified deployment over a network. Vs Mem0, Graphiti, and Letta: OpenViking is the context database spanning memory/RAG/skills, not simply a memory API, graph memory layer, or agent runtime.

  7. 7.OpenHumanGPL-3 local-first agent orchestrator with memory trees and MCP

    Free / OSS · Freemium · 42.2k GitHub stars

    VerdictGPL-3 local-first agent OS with real memory UX. Worth a look for personal orchestration; assume beta edges and price the subscription defaults honestly.

    CatchVs Pi, Claude Code, OpenClaw, and OKF/ai-memory: OpenHuman is the TinyHumans desktop orchestrator + memory product, not a coding-agent CLI harness, Anthropic's CLI, a messaging agent, or a zero-LLM git memory wiki. README marks Early Beta and managed web search / model routing / media tools ride an OpenHuman subscription by default — treat the SaaS path as freemium, not "free forever," even though the repo is GPL-3 and BYOK/local modes exist. GPL-3 copyleft applies to modifications you distribute.

  8. 8.Obsidian MindMIT Obsidian vault as persistent agent memory

    Free / OSS · OSS/MIT · 5.4k GitHub stars

    VerdictThe most complete plain-Markdown memory setup for Claude Code and friends — free, but opinionated and Obsidian-bound.

    CatchIt is opinionated about work life — standups, 1:1s, brag docs, incident capture — so it fits people who want an agent-run work journal, not just a project memory file. Needs Obsidian 1.12+ (a free but closed-source app) with its CLI enabled, plus Node 22+. QMD downloads about 2 GB of local models on first use. Hooks run on every session and message, so read them before you trust a vault. Vs mem0 or Letta: those are memory layers you build into an app; this is a personal vault for your own coding agent.

FAQ

What are the best free alternatives to book-to-skill?
agentsview, Engram, oh-my-hermes, Friday, AX Check. All are reviewed on Stack Gems in the same category (agent memory tools); 8 free or open source.
What is the catch with book-to-skill?
Vs Skillbox and Claude Code Templates: this generates content skills from documents, not a self-hosted skills registry/MCP plane and not a catalog of Claude Code agents/hooks/MCPs.
Is there an open-source alternative to book-to-skill?
Yes: agentsview (OSS/MIT), Engram (OSS/MIT), oh-my-hermes (OSS/MIT), Friday (OSS/MIT).

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