engram

The mix-up worth clearing first: Engram is not an agent-memory plugin. It doesn't give your agent persistent memory, context, or knowledge of your codebase — memory MCPs and context tools do that, for the agent. Engram points the other way: it's a learning system for the human. Your agent becomes a tutor that makes you do the thinking, a blind examiner that checks you actually got it, and a scheduler that brings each idea back right before your brain drops it. The agent doesn't get smarter. You do — measurably, with receipts.

Born as a Claude Code plugin; the same skills and engine now run on nine agentic platforms — including, as of v1.0.8, one that puts the tutor in your chat app, and, as of v1.12.0, both OpenCode generations (the 2.0 beta rebuilt its plugin API; Engram ships adapters for both in one package):

claude plugin marketplace add nagisanzenin/engram
claude plugin install engram@engram

OpenCode: opencode.json is read globally (~/.config/opencode/opencode.json) or per-project; pin to source instead of npm with "plugin": ["git+https://github.com/nagisanzenin/engram.git"]. OpenCode 2.0 beta (opencode2) uses a new plugin API — same package name works there too (V2 auto-selects the right adapter): INSTALL-OPENCODE-V2.md. Antigravity: The due-review session nudge isn't ported yet, and the architect and smith subagents are currently dropped by AG 1.1.4's strict installer. Everything else works the same. OpenClaw: the nudge needs openclaw config set hooks.internal.enabled true (OpenClaw ignores plugin hooks until internal hooks are switched on), and it fires on /new and /reset rather than every session. Engram's agents aren't registered — the skills spawn them through sessions_spawn with isolated context instead, which keeps the assessor blind. Details in INSTALL-OPENCLAW.md. DeepSeek Harness: developer preview — the port uses only stock dsh capabilities (native ~/.agents/skills discovery, the Claude Code hook bridge for the nudge), so harness drift degrades a surface rather than crashing. Needs a DeepSeek API key. Skills-in-session and the full nudge chain are verified on the real runtime; a model-driven session is not yet — first-run reports welcome. Details in INSTALL-DSH.md. ZCode: Claude Code-compatible plugin surfaces, so the port is manifest + one hook-format switch + docs. ZCode discards plain SessionStart stdout and logs non-JSON runs as failed — so the shared hook script detects ZCode's plugin context (ZCODE_PLUGIN_ROOT) and emits the JSON shape that runner parses; on every other platform it prints plain text exactly as before. The blind assessor runs as a fresh-context generic Agent child; declared plugin agents are diagnostic-only in ZCode 3.9.2. A live model-driven session is not yet recorded — first-run reports welcome. Details in INSTALL-ZCODE.md. Pi: no subagent tool by design — the skills spawn the blind assessor as a fresh pi -p process instead (isolation by process boundary). The nudge is one TUI notice at session start plus one injected message on your first prompt (worst case the next one — the probe never blocks startup). Details in INSTALL-PI.md.

Then, inside your coding assistant (command spelling per your platform's row above):

/learn kalman filters        ← or music theory, or Rust lifetimes, or anything

That's the whole onboarding. No config, no account, no cards to write. Requires python3 (stock macOS/Linux one is fine — stdlib only). One state folder, every platform: learn in one tool, review in another, same schedule.

Wait — what is this?

You already ask Claude to explain things. It explains beautifully. You nod, you feel smart, and ten days later it's gone — because a chat has no memory of you, no test of whether you really got it, and no plan for the forgetting that starts the moment you close the terminal.

Engram is what's missing around the explanation: a tutor that makes you do the thinking, an examiner that checks you actually got it, and a scheduler that brings each idea back right before your brain drops it.

Concretely, installing it gives you: three commands (/learn, /review, /coach — exact spelling per platform in the table above), a quiet session nudge that tells you when reviews are due (and says nothing otherwise — on every platform except Antigravity, whose hook port is pending; on OpenClaw it needs one config flag and fires on /new), and a state folder at ~/.claude/learning/ that you own, can read, and share across every platform you use.

 recall
 100% ─┐ just reading                100% ─┐ with engram
       │\                                  │\      ●╌╌╌●╌╌╌╌╌●╌╌╌╌╌╌╌●╌╌
       │ \                                 │ \    ╱    ╲╱      ╲╱
       │  \__                              │  ●──╱
       │     \____                         │
       │          \_______                 │   each ● = a 2–4 minute /review,
   0% ─┴──────────────────── day 30    0% ─┴─  booked just before you'd forget

The loop

  YOU ──→  /learn transformers
            │
            ▼
  ┌────────────────────────────────────────────────────────────────┐
  │  CURRICULUM ARCHITECT                                          │
  │  breaks the topic into a first-principles concept map:         │
  │  "what must be understood before what" — never chapter order.  │
  │  flags the few THRESHOLD concepts † that unlock everything.    │
  └────────────────────────────────────────────────────────────────┘
            │
            ▼
  ┌────────────────────────────────────────────────────────────────┐
  │  THE TUTOR  (your normal Claude chat, under strict rules)      │
  │                                                                │
  │  per concept:  open a question → you PREDICT → struggle a      │
  │  little (hints, not answers) → resolve → you EXPLAIN IT BACK   │
  │                                                                │
  │  threshold concepts get a generated interactive HTML           │
  │  explorable — sliders and prediction gates, not more text.     │
  └────────────────────────────────────────────────────────────────┘
            │   your answers, verbatim (crash-safe stash on disk)
            ▼
  ┌───────────────────