[nofuturekid]

Fixes #177

Stacked on #179 (the base stays rebuild; until #179 lands, its commit shows in this diff too). Plan Task 6 of docs/superpowers/plans/2026-11-13-obsbot4linux-w0-contracts.md. No camera I/O and no byte sent to a camera changes: the removed code is the 0.13 command line, daemon, client, protocol and full status; the carried device code and its byte guard are untouched.

What changed

• Deleted crates/obsbot4linux/src/{cli,client,daemon,proto}.rs, crates/obsbot-device/src/legacy/full_status.rs (and its pub mod line), and stage G's CLI guard crates/obsbot4linux/tests/cli_surface.rs with tests/fixtures/cli-surface.txt. legacy/state.rs and legacy/current_pose.rs are unchanged.
• crates/obsbot4linux/src/main.rs is the plan's stub (message on stderr, exit 1). [dependencies] of the CLI crate is obsbot-proto only; Cargo.lock follows.
• New scripts/check-cli-deps.sh (cargo metadata and jq): fails when the CLI's [dependencies] contain obsbot-device or obsbot4linuxd. New step scripts/check-cli-deps.sh in job test of ci.yml, after cargo test.
• No CHANGELOG line: nothing here is visible to a user of a release.

Adaptations to the plan (the plan is corrected afterwards)

1. Stage G's tests of the old command line were tests/cli_surface.rs (+ fixture), as the plan says "G's --help comparison among them"; crates/obsbot4linux/tests/ is now gone.
2. crates/obsbot-device/src/scripted.rs: the variant Answer::Rejected and its match arm are removed. Only the removed full_status tests constructed it, so cargo clippy --all-targets -- -D warnings fails with variant Rejected is never constructed without this. The real parsing of a rejected answer stays covered by family/frame.rs and family/exchange.rs (Error::Rejected(COMMAND, -3)), which do not use the double's variant.
3. scripts/check-cli-deps.sh: the last line is echo "CLI dependencies: $(printf '%s' "$deps" | paste -sd' ' -)" instead of printf '%s ' $deps. The plan's line fails shellcheck (SC2086) and prints a trailing space; this one passes shellcheck and prints exactly CLI dependencies: obsbot-proto.
4. scripts/check-cli-deps.sh (fix round): cargo metadata is captured in a variable before it goes to jq, and an empty dependency list is an error, so a failing cargo metadata no longer ends in exit 0. Mutation: obsbot4linuxd.workspace = true in the CLI's [dependencies] now exits 101 with cargo's error (before: exit 0); obsbot-device.workspace = true still prints the spec message and exits 1.
5. crates/obsbot-device/src/legacy/mod.rs: the module doc no longer says the 0.13 daemon and CLI use it; it names the carried Tiny 2 Lite flows (state, current_pose) as the users until track A rewrites them.
6. The plan's git grep expectation is met for crates/. Two lines in docs/center-parity.md (18 and 172) still name legacy/full_status.rs (CAPABILITIES); the plan does not list that file for this task, so it is left for the docs task.

Removed tests (34) and why none covered code that stays

Each one tested the removed code. One caveat: the four full_status_with tests also ran the carried read methods audio_volume, live_pose, zoom_factor, status and tracking through the scripted device (for example audio 55, pose 25/10, zoom 2.0). Their decoders keep their own unit tests; the end-to-end test of Camera::audio_volume goes away with this removal (no other caller or test remains) until track A rewrites the reads.

• legacy/full_status.rs (7): hand_serialises_area_and_a_null_return, zone_serialises_with_return_as_key, model_and_device_are_top_level_keys (serialisation of FullStatus, ZoneInfo), a_rejected_tracking_query_gives_tracking_null_and_the_rest_of_the_status, an_answered_tracking_query_is_in_the_status, any_other_tracking_error_fails_the_whole_read, the_target_is_asked_only_while_ai_tracking_is_on (all four call full_status_with, removed with the file; the camera methods it called are covered by their own tests in family/ and models/tiny2lite/).
• obsbot4linux/src/cli.rs (7): led_keeps_its_plain_brightness_and_gains_blink, startup_set_takes_ai_alone_or_with_a_pose_and_only_verified_modes, wake_without_arguments_still_wakes, exposure_manual_takes_time_and_gain_and_volume_is_bounded, gimbal_and_zoom_keep_their_syntax_and_gain_subcommands, framing_commands_parse, detect_prints_the_model_and_the_streaming_node (clap parsing of the 0.13 command line).
• obsbot4linux/src/client.rs (2): watch_fails_when_the_daemon_goes_away, watch_ends_normally_when_its_reader_goes_away (0.13 socket client).
• obsbot4linux/src/daemon.rs (12): a_lost_camera_is_announced_once_with_null_model_and_device, a_change_announces_nothing_until_the_camera_is_read_again, identity_is_kept_once_answered_and_dropped_with_the_camera, target_box_jitter_is_not_a_change_but_detected_is, reads_are_told_from_the_parsed_command_not_from_argv, stops_keep_the_zone_cache_other_moves_drop_it, preset_changes_drop_the_cache_so_the_new_list_is_broadcast, the_pose_is_polled_while_any_connection_wants_it, repeated_on_from_one_connection_needs_only_one_off, live_pose_is_a_request_for_the_connection_not_a_camera_command, a_second_daemon_does_not_take_over_the_socket, a_stale_socket_is_replaced (0.13 daemon loop and socket handling).
• obsbot4linux/src/proto.rs (4): request_and_response_serialise_as_documented, every_client_gets_the_event_and_new_clients_the_last_state, a_closed_client_is_dropped_and_does_not_stop_the_broadcast, a_client_that_does_not_read_is_disconnected (0.13 wire protocol and broadcast).
• obsbot4linux/tests/cli_surface.rs (2): help_texts_are_unchanged, version_is_the_package_version (compare the 0.13 --help texts with a fixture; the binary no longer has them).

obsbot-device/tests/byte_guard.rs (the byte guard of the carried device code) stays and passes. Device lib tests: 164 pass (171 before: the 7 removed above).

Verification (CARGO_TARGET_DIR outside the repo, nice, -j 3)

• cargo fmt --check: clean.
• cargo clippy --workspace --all-targets --locked -- -D warnings: clean.
• cargo test --workspace --locked: all pass (device 164, byte_guard 1, proto 10 + types 4).
• cargo build --workspace: succeeds.
• scripts/check-cli-deps.sh: prints CLI dependencies: obsbot-proto, exit 0.
• Mutation: with obsbot-device.workspace = true added to the CLI's [dependencies] the script prints the obsbot4linux CLI depends on obsbot-device; only obsbot-proto is allowed (spec section 3) and exits 1; reverted.
• cargo run -q -p obsbot4linux: prints obsbot4linux: the 1.0 command line is not built yet (stage W0 of the 1.0 rebuild), exit 1 (the binary was run once, without any device access: the stub opens nothing).
• actionlint .github/workflows/ci.yml and shellcheck scripts/check-cli-deps.sh: clean.
• git grep -n 'full_status\|FullStatus\|ZoneInfo\|CAPABILITIES' crates/: no match.
• CI: the required check and the packaging jobs are green at the previous head; its log shows the new step printing CLI dependencies: obsbot-proto.

AI-assisted (Claude Code).

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