MOB-15: torch / flashlight support in core (Mob.Torch) - #61
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New Mob.Torch (on/1, off/1, set/2) toggles the rear-camera torch with no camera session and no permission, so it's a lightweight core capability alongside Mob.Haptic rather than part of mob_camera. - lib/mob/torch.ex — on/off API; pure state_atom/1 mapping (host-testable) - src/mob_nif.erl — torch/1 NIF declaration + stub - ios/mob_nif.m — nif_torch: AVCaptureDevice torchMode, hasTorch guard, setTorchModeOnWithLevel: at max; no-op without a torch - android/jni/mob_nif.zig — nif_torch -> MobBridge.torch(String) via the cached-method seam (Kotlin half is the paired mob_new change) - test/mob/torch_test.exs — state_atom mapping + boolean guard - decisions/2026-07-04-torch.md — core-vs-plugin + on/off-only rationale - guides/mobile_surface_matrix.md — Torch row On/off only for v1 (iOS supports brightness levels, Android setTorchMode is binary — level is a follow-up). Device verification pending (no torch on the simulator). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Both platforms physically lit the rear flash on and off — Android via :mob_nif.torch/1 over dist, iOS via an on-device Mob.Torch.set/2 button. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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GenericJam added a commit
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Jul 5, 2026
Ships MOB-15 (#61): Mob.Torch.on/off/set toggles the rear-camera torch with no capture session and no permission. Device-verified on moto g power (2021) and iPhone SE (3rd gen). Android Kotlin bridge ships via mob_new 0.4.17+. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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What
Adds
Mob.Torch— a rear-camera torch (flashlight) on/off toggle in core mob. This is themobhalf; the KotlinMobBridge.torchmethod is the paired GenericJam/mob_new PR.Linear: MOB-15 (Tier-2 hardware gap from the capability audit).
Design decisions (flagging for review — see
decisions/2026-07-04-torch.md)mob_camera. Both platforms toggle the torch without a capture session and without the camera permission (iOSAVCaptureDevice.lockForConfiguration+torchMode; AndroidCameraManager.setTorchMode). So it has no camera-plugin dependency and belongs with the other lightweight permission-free outputs likeMob.Haptic. Easy to move intomob_camerainstead if you'd rather — say the word.setTorchModeOnWithLevel:) but AndroidsetTorchModeis binary (per-torch strength is API 33+ only). A cross-platformlevel:option would be honored on one side and clamped on the other, so it's deferred to keep the contract honest. v1 drives iOS at max level.Mob.Haptic.trigger/2— returns the socket unchanged; a device with no flash unit (tablets, the simulator) is a no-op, not an error (both native sides guard on hardware presence).Layers
lib/mob/torch.ex—on/1,off/1,set/2; purestate_atom/1mapping extracted for host-testing (the MOB-6 pattern).src/mob_nif.erl—torch/1NIF declaration + stub.ios/mob_nif.m—nif_torch+ array entry.android/jni/mob_nif.zig—nif_torch→MobBridge.torch(String)via the cached-method seam (field + export +cacheRequired+ NIF table entry).test/mob/torch_test.exs,decisions/2026-07-04-torch.md, and a Torch row inguides/mobile_surface_matrix.md.Tests / checks
972 pass (3 new).
mix format,mix credo --strict,mix erlfmt --check src/,xcrun clang-format, andzig fmt --checkall clean.Merge coupling & verification
MobBridge.torch, and the zigCallStaticVoidMethodneeds the method present). Same ordering as MOB-6.🤖 Generated with Claude Code