feat(autonomy): memory model + long-term goal + bias-to-action + live-your-life prompt

Three things that together turn the bot from a reactive chat agent into
a goal-driven autonomous one.

1. Memory model (docs/memory-model.md, new). Formal split:
   - SHARED knowledge — skills/, extensions/, prompts/, docs/,
     .pi/settings.json — committed, community-improvable, portable to any
     server.
   - PERSONAL memory — state/<MC_HOST>/ — gitignored, per-instance, per-
     server. Survives restarts (local disk), doesn't survive a re-clone
     (deliberately). Holds goal.md, plan.md, current-task.json,
     locations.json, diary/, inventory-log.jsonl, escalations.
   Covers resume-after-restart protocol, what "abstract a lesson into a
   skill" means, and the two anti-patterns (committing state, gitignoring
   shared knowledge).

2. AGENTS.md changes:
   - New section "Long-term goal and personal memory" wiring AGENTS.md
     directly into state/<MC_HOST>/goal.md + current-task.json with a
     pointer to docs/memory-model.md.
   - Operating principle #4 ("I'll try to learn") rewritten with
     **bias to action**: a pending stub is now a last resort, not a
     default. Operator-trusted requests are themselves approval — bot
     does not write a stub and wait for a separate "go".
     Rationale: today's pyramid task got stuck because the bot wrote
     a careful "pending" stub and waited; the operator had to send
     "ты ждешь одобрения? можешь стартовать!" before any action. That
     extra round-trip is the reflex this rewrite removes.
   - Operating principle #5 ("live your best life when idle") expanded
     to "goal-driven autonomy" with an explicit 5-level priority order
     (operator task > non-op reply > resume current-task.json > next
     plan milestone > decompose goal). Memory protocol made concrete:
     write current-task.json before every meaningful action, append to
     diary, keep locations.json fresh, tick off plan.md.

3. prompts/live-your-life.md (new). Canonical kickoff to switch the
   bot into autonomous mode. Numbered concrete asks (re-read three
   docs, write plan.md, implement memory protocol, implement
   resume-on-restart, start). Includes a "plan.md draft for review"
   gate so the operator can shape direction without micromanaging
   execution. Designed to be sent after Phase 0/1/operator-trust are
   stable and a goal.md exists for the target server.

Companion seed (local-only, NOT in this commit because gitignored):
state/play.xmatic.team_25565/goal.md — "build a small village and
survive long-term, live like a farmer". Lives only on the operator's
machine; a fresh clone won't see it.

README and roadmap updated with the new Phase 3 status (🌱 → 🌿
kickoff) and pointers to the new memory-model doc.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

README.md

@@ -160,7 +160,11 @@ These are mirrored in `AGENTS.md` and re-stated at the top of any system prompt
 
 🌳 **Phase 1 — Presence** implemented and operator trust wired: the bridge stays online with bounded reconnects, keeps a rolling chat buffer, exposes status/recent-chat/operator/escalation tools, applies `OPERATOR_USERNAMES` as scope-only trust, and can prompt the Pi loop to reply sparingly. Phase 5 self-extension is documented and in progress; Phase 6 escalation logging is implemented.
 
-Full plan: [`docs/roadmap.md`](./docs/roadmap.md). Day-to-day judgement principles live under "Operating principles" in [`AGENTS.md`](./AGENTS.md).
+🌿 **Phase 2 — Locomotion with guard rails** in progress (operator task: build a 5×5 pyramid; `mineflayer-pathfinder` installed).
+
+🌱 **Phase 3 — Goal-driven autonomy** seeded: [`docs/memory-model.md`](./docs/memory-model.md) defines shared-knowledge vs personal-memory; per-server `goal.md` / `plan.md` / `current-task.json` / `diary/` shape autonomous behaviour. Kickoff via [`prompts/live-your-life.md`](./prompts/live-your-life.md).
+
+Full plan: [`docs/roadmap.md`](./docs/roadmap.md). Memory layout: [`docs/memory-model.md`](./docs/memory-model.md). Day-to-day judgement: "Operating principles" in [`AGENTS.md`](./AGENTS.md).
 
 ## License