docs(spec): record the Alfred vault trial as alternate storage (ADR 0001)

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

docs/adr-0001-alfred-vault-trial.md

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+# ADR 0001 — Alfred: agent-runtime trial writing to a Markdown vault
+
+**Status:** trial, 2026-09-20
+**Owner:** padreug
+**Code:** `~/Work/tries/2026-09-20-alfred-vm/` (bohm), not yet in any aiolabs repo
+
+## Context
+
+The community-organizer spec (this repo, `docs/community-organizer-spec.md`)
+defines capture as NIP-52 events scoped by NIP-72 communities, produced by
+the `tracker` maubot plugin. Phase 1 of `tracker` shipped rules-only; the
+LLM tier (§6.1 level 2), Nostr publishing (§4) and per-user signing (§7.2)
+never landed. The 2026-06-02 pilot review recorded that the community had
+already named the bot "Alfred" and asked for digests, an LLM fallback and
+grammar tolerance.
+
+On 2026-09-19 a separate "2nd brain" landed for the operator: plain-Markdown
+zk vaults, one Forgejo repo per vault, `brain todos` scanning `- [ ]` lines
+in `journal/` and `projects/`, `brain sync` for git. The chateau vault
+(`padreug/brain-chateaudufaune`) is one of them.
+
+The May 2026 planning session had suggested an OpenClaw/ZeroClaw-style
+agent "running on its own machine" as an alternate runtime (spec §12).
+
+## Decision
+
+Run a **trial** of that alternate runtime, sized to one community and one
+vault:
+
+- **Runtime:** ZeroClaw (0.8.3 from nixpkgs, rebuilt with `channel-matrix`;
+  upstream NixOS module) in a QEMU VM on bohm. Explicitly **not** on cfaun.
+- **Store:** the chateau vault — Markdown + git, `main`, same repo the
+  operator's laptop syncs. Alfred commits and pushes every write with a
+  repo-scoped write deploy key; force-push is blocked on Forgejo.
+- **Inference:** the optimus box (`http://192.168.0.33:8080/v1`, llama-swap:
+  GLM-4.7-Flash for chat, GPT-OSS-120B for the nightly digest).
+- **Behaviour:** mention-gated replies in one Matrix room; a matrix-nio
+  sidecar logs the whole room per day; a 22:00 Europe/Paris cron job
+  digests the log into `journal/YYYY-MM-DD.md` (`## Chat digest (Alfred)`)
+  and proposes tasks; "what needs doing" runs a deterministic port of
+  `brain todos` so answers match the laptop.
+- **Bounds:** `workspace_only`, shell allowlist `git` + `vault-todos`, no
+  web/delegation tools, autonomy `full` (switch to `supervised` if it
+  misbehaves). Prompt injection from the room is bounded to that repo;
+  git history is the undo.
+
+## Consequences
+
+- **Not spec-conformant.** Alfred emits no §4 events and knows nothing of
+  §5 communities or §7 signing. Nothing downstream (eink renderer, relays,
+  third-party Nostr clients) sees its output. It shares §3.1 vocabulary
+  (task / journal / done / list) and the §6 rule that capture never blocks
+  on classification (unsure → `inbox/`).
+- **Two writers, one repo.** Laptop and bot both `pull --rebase` before
+  push and stage explicit paths only; the bot never touches `hubs/`,
+  `notes/`, `README.md`, `.zk/`. Conflicts abort and ask a human.
+- **Local-model quality is the unknown.** Multi-step tool loops (edit
+  file + git) on GLM-Flash are unproven; the deterministic todos path is
+  immune.
+- **Dependency churn.** ZeroClaw moves fast; config keys were read from the
+  v0.8.3 source. The upstream v0.8.5 flake did not evaluate (Cargo hash
+  mismatch), hence the nixpkgs rebuild.
+
+## Revisit when
+
+- The trial holds up for a few weeks → promote to cfaun as a
+  `services.zeroclaw` instance in `server-deploy` (sops for env + deploy
+  key, `networking.hosts` for optimus) and decide whether `tracker` is
+  retired or bridged (a small publisher turning vault commits into §4
+  events would restore conformance).
+- The agent is unreliable → fall back to a deterministic maubot plugin
+  (`dev.aiolabs.alfred`): Python vault writers, `brain todos` port,
+  in-process git under an asyncio lock, model used only to parse JSON.
+  Sketched in the 2026-09-20 planning session; not built.
+- Either way, update spec §12 "Alternate storage (trial)" and this ADR.