Say what is true of this project, and link what is true of the machine

AGENTS.md had grown a description of the machine these sessions run on --
the two boxes, the qemu networking, the shared ~/repos mount, gitea and the
push permission, the Android SDK path, the shared emulator, how to detach a
server. None of that is about ai-app, and all of it is equally true in the
sibling repos, so each copy was a place for the truth to drift: the push
note in this one had been wrong since the bot key was authorized, and the
checkout path it named had moved.

It now lives once in ~/.claude/MACHINE.md, which every session already
reads. What stays here is only what the machine means for this project: that
ai-server belongs on the host because WireGuard terminates there, that the
tunnel can never terminate in the VM, that the claude CLI being VM-only
makes it a remote to the backend, and where this project's secrets live
instead of the repo.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017xn8nHw1tw1R6PtiY1eEtw

AGENTS.md

@@ -86,32 +86,18 @@ real-phone/WireGuard bring-up, which is operational rather than code.
 
 ## Where things run (host vs this VM)
 
-Established 2026-08-25, and it decides more than it looks like:
+Established 2026-08-25, and it decides more than it looks like. The machine
+itself — the two boxes, the shared `~/repos` mount, gitea, and why the VM is
+treated as untrusted — is described once in `~/.claude/MACHINE.md`; what
+follows is only what that means for **this** project.
 
-- **The host (192.168.1.168) is the backend machine.** It runs
-  dev-updater's server today and is where `ai-server` belongs in
-  production: it has the LAN address the phone can reach, and it's where
-  WireGuard terminates. `wg-setup-host.sh` sets that up (keys, `wg0.conf`,
-  the phone's QR); run it there with `sudo WG_ENDPOINT=<ddns name>`.
-- **This VM is a dev sandbox behind qemu user-mode networking**
-  (10.0.2.15, gateway 10.0.2.2) — outbound only. The host is reachable at
-  10.0.2.2, but **nothing outside can initiate a connection into the VM**,
-  so the tunnel and the real phone can never terminate here.
-- **Code reaches the host through gitea, not the shared mount.** This VM's
-  checkout (`~/repos/ai-app`, a virtiofs mount the host also sees at
-  `~/stuff/vm/ai/repos/ai-app`) is a working copy only: its `origin` is
-  `git@git.arirex.me:iris/ai-app`, and the `iris-ai` bot key this VM holds
-  is authorized to push there — it was not until 2026-08-28, so anything
-  written before that saying a push fails with `Permission denied
-  (publickey)` is stale. The host still builds and runs from its own
-  separate clone outside the shared mount, so what keeps VM-authored code
-  off the host is the pull being a deliberate act there, not a filesystem
-  permission and no longer a push this VM cannot make.
-- Consequence for building here: `server/target/` is shared with the host's
-  view of *this* checkout, so if anything on the host ever builds from the
-  shared path, the two `cargo build`s replace each other's binary and each
-  rebuilds from scratch. Building on the host from its own clone avoids it
-  entirely.
+- **`ai-server` belongs on the host in production.** That is where the LAN
+  address the phone can reach is, and where WireGuard terminates.
+  `wg-setup-host.sh` sets that up (keys, `wg0.conf`, the phone's QR); run
+  it there with `sudo WG_ENDPOINT=<ddns name>`.
+- **The tunnel and the real phone can never terminate in the VM**, because
+  nothing outside can open a connection into it. Phone bring-up is host
+  work.
 - `wg0` (10.66.0.1) now exists in this VM too, so the production path —
   `ai-server` with no `--bind` — is exercisable during development. It has
   no reachable peer and doesn't need one; the interface existing is what
@@ -122,14 +108,13 @@ Established 2026-08-25, and it decides more than it looks like:
   network namespaces inside one machine and drives the server through it
   — a genuine handshake against 10.66.0.1 with pinned TLS, no router or
   phone involved. That's the way to verify the wg0-only posture.
-- **The `claude` CLI is installed in this VM only, not on the host.** So
-  the backend reaches it the same way it would any other machine: a
-  configured host, and a session that names it. For the host to ssh in,
-  the VM needs an inbound port forward in its launch configuration
-  (qemu `hostfwd`) — usermode networking has none by default.
-- **Nothing secret goes in the repo.** The VM is treated as untrusted (see
-  PLAN.md's security section), and the repo is shared read-write with the
-  host, so state lives outside it: `$XDG_CONFIG_HOME/ai-app/config.ron`
+- **The `claude` CLI is only in the VM, so from the host it is a remote.**
+  The backend reaches it the way it would any other machine: a configured
+  host, and a session that names it. For the host to ssh in, the VM needs
+  an inbound port forward it does not have by default.
+- **Nothing secret goes in the repo**, which is shared with the host and
+  attacker-writable under this project's threat model (PLAN.md's security
+  section). So state lives outside it: `$XDG_CONFIG_HOME/ai-app/config.ron`
   and `certs/`, `$XDG_DATA_HOME/ai-app/sessions/`, owner-only.
 - Certificates are generated **by the server, on first start**, into
   `$XDG_CONFIG_HOME/ai-app/certs` (`--certs` overrides). The CA is created
@@ -173,20 +158,3 @@ Established 2026-08-25, and it decides more than it looks like:
   through `androidComponents.onVariants { it.sources.java?.addGenerated
   SourceDirectory(task, Task::outputDir) }`, which also carries the task
   dependency.
-
-## Environment notes (this machine, learned in dev-updater)
-
-- Android SDK is at `~/Android/Sdk`, not the root-owned `/opt/android-sdk`
-  the ambient `$ANDROID_HOME` may point at; copy dev-updater's
-  `android-env.sh` override pattern.
-- Each agent command runs in a fresh shell — exported environment does not
-  carry over. Chain: `cd app && . ./android-env.sh && ./gradlew …`. Never
-  pipe `source` into `head`/`grep` (subshell discards the exports).
-- The shared emulator AVD is named `tdep` — one emulator across the Android
-  projects on this machine, not one per repo.
-- Long-running servers launched from an agent must be fully detached
-  (`setsid nohup … & disown -h`, verify `PPID 1`), and every
-  `pgrep -f`/`pkill -f` pattern needs its first character bracketed
-  (`[a]i-server`) in **every** occurrence in the command, or the pattern
-  matches the shell running it. Full explanation in dev-updater's
-  `AGENTS.md` — it bites exactly the same way here.