Extend on-device verification to the agent loop

Implemented-By: OpenCode session (model recorded in docs/implementer-log.md)

docs/implementer-log.md

@@ -39,6 +39,7 @@ reviewer adds findings under "Reviews" once per milestone.
 | M2b/07-loopd-channel | 2026-09-18 | done | 3 | fail | none | Wrote crates/loopd/src/channel.rs and registered `pub mod channel;` in lib.rs. `Context` holds a private `Mutex<HashSet<SessionId>>`; `serve` accepts forever with one thread per connection and returns on an accept error; `handle` does the seven steps (read_frame with Closed-before-anything, turn-only, mark busy, open-or-create plus run_turn streaming events, release before the final frame, error-code mapping, quiet write failure). The busy guard is a `Held` struct that borrows the context immutably and holds a clone of the id but never the lock, and it is dropped before sending turn_done or error so a client can send the next turn the moment it reads the last one — that is what keeps `a_busy_session_is_refused_at_once` and the concurrent-session test correct. Channel test reported `6 passed` ten runs in a row, all clean. Two fixes before a clean gate: `cargo fmt` import order and a clippy `question_mark` on the accept loop, re-run after each. | ? |
 | M2b/08-loopd-serve | 2026-09-18 | done | 2 | fail | none | Rewrote crates/loopd/src/main.rs into two commands, `selftest` and `serve`, both sharing `run_selftest_check` so the self-test lines are identical. `serve` loads config (exit 1 on failure), removes an existing socket via `channel_socket()` before the self-test, runs the self-test and exits 1 without binding on failure, then creates the socket's parent dir, binds, sets mode 0600 with `std::fs::set_permissions`, prints `serving on`, and calls `channel::serve` with a `Context` from the config, client, `Box::new(FakeTools::new())` and `Registry::m2b()`. Anything else prints both usages and exits 2. The `serve_refuses...` test's "no socket left behind" holds because the socket is removed before the self-test and binding happens only after it passes. First gate run failed on two clippy `collapsible_if` lints; collapsed the two nested `if let` into edition-2024 let-chains and re-ran, which passed. `cargo test -p loopd --test serve` reports 3 passed. | ? |
 | M2b/09-bxctl-chat | 2026-09-18 | done | 5 | fail | none | Wrote crates/bxctl/src/chat.rs: `run_turn` (open socket, one `write_frame` with id 1, loop `read_frame` asserting id 1, dispatch final `TurnDone`/`Error` and non-final `TurnEvent` to `on_event`, every other frame `Protocol`); `ChatError` (Connect/Frame/Refused/Protocol) with `source()` returning the io and FrameError; `new_session_id` = `chat-<secs>-<nanos>` via two `expect`s (the epoch check and a private-field construction that cannot fail); `Printer` with json mode (one serde_json line per event, no skipping, no escape codes), a dimmed reasoning block opened on the first `Reasoning` and closed on the next non-reasoning event or `end_reasoning`, and every other event kind named exactly. Registered `pub mod chat;` in lib.rs. Rewrote main.rs into a `chat` subcommand: usage + exit 2 for a wrong first arg or unknown flag/missing value/invalid id, `$BOXMAKER_HOME/run/loop/loop.sock` else `/var/lib/boxmaker/...`, `--say` (events to stderr, answer to stdout, resume=true then one retry with resume=false on no_such_session), interactive (create on first turn, resume on the rest, `/quit` stops, the created session id printed once to stdout), `--json` (events to stderr, the TurnDone also to stderr after them, plain answer to stdout). A `Sink` records the first write error so the `on_event` closure (which cannot return a Result) does not lose it. All 11 chat tests pass. Four gate runs before clean: clippy `io_other_error` (switched to `Error::other`), then `redundant_closure` twice (the `other` map and `get_or_insert_with`), then a rustfmt import-order diff. | ? | Committed Cargo.lock alongside bxctl: adding serde_json to bxctl's Cargo.toml changes the workspace lock, and the gate's `--locked` deny check would otherwise fail on the checked-out tree. |
+| M2b/10-verify-device | 2026-09-18 | done | 1 | pass | none | No library code. Copied the three given files byte-identical (`cmp` clean): `crates/loopd/tests/device.rs` (replaces the M2a one, its four checks still in it), `Makefile` (only change: `verify-device` now also passes `BOXMAKER_BXCTL`), and `config/system.md`. `make gate` printed `gate: ok` with device at `0 passed; 0 failed; 6 ignored`. `curl http://straylight:11434/health` returned `{"status":"ok"}`. `make verify-device` ran all six checks against the real server in 41.6s, all passed: self-test, capped-thinking block, a four-turn conversation surviving a `loopd` restart with its cache, a request surviving its proxy being killed and restarted, a second turn reusing the first turn's cache, and the baseline fitting the token budget. The baseline is 251 tokens (the brief allows 3000). Ran directly rather than via a subagent: the `delegate` tool returned `Agent "undefined" not found` on every attempt. | ? |
 
 
 ## Reviews