Trim README and remove product brief

Author: rudrankriyam

AGENTS.md

@@ -9,9 +9,8 @@
 
 ## Sources of truth
 
-- `README.md` documents shipped workflows and validation commands.
+- `README.md` documents shipped workflows and the quick start.
 - `coreai.md` contains notes from the local SDK interfaces.
-- `PRODUCT.md` describes product direction. Do not present planned work as implemented.
 - `CoreAIFrameworkLab.xcodeproj` is the Xcode project source of truth. Make target, package, build-setting, file-membership, and shared-scheme changes directly in Xcode, then commit the resulting project changes. Do not introduce a project generator.
 - `CoreAILab/Resources/AppleModels/apple-coreai-models.json` is generated by `Scripts/update_apple_model_catalog.py`. Keep its source revision aligned with the pinned `coreai-models` package revision in the Xcode project and related documentation.
 
@@ -80,7 +79,7 @@ uv run pytest -q
 
 - Use Swift Testing (`import Testing`, `@Test`, `#expect`, `#require`) and deterministic local fixtures for new Swift tests.
 - Keep tests that need external model assets opt-in through their existing `COREAI_*` environment variables. Do not download weights, authenticate to external services, or add credentials to the repository as part of the default suite.
-- Run `Scripts/run_device_tests.py` only for physical iOS Core AI behavior and only when an unlocked iOS 27+ device and existing signing assets are available. Start with `--dry-run`; never enable provisioning updates automatically. See `README.md` for the exact contract.
+- Run `Scripts/run_device_tests.py` only for physical iOS Core AI behavior and only when an unlocked iOS 27+ device and existing signing assets are available. Start with `--dry-run`; never enable provisioning updates automatically. Run `python3 Scripts/run_device_tests.py --help` for the exact contract.
 - Match validation to the change. Documentation-only changes do not need a full Xcode build; Swift behavior changes need the relevant build and tests, and platform-specific behavior needs validation on that platform. Report any unavailable hardware, model, signing, or toolchain prerequisite explicitly.
 
 ## PR comment loop

PRODUCT.md

@@ -31,8 +31,6 @@ benchmarking, and packaging models with Apple's `CoreAI.framework`.
 - [Common Workflows](#common-workflows)
 - [Model Workflows](#model-workflows)
 - [For Contributors and Agents](#for-contributors-and-agents)
-- [Repository Map](#repository-map)
-- [Validation](#validation)
 - [Current Boundaries](#current-boundaries)
 - [Documentation](#documentation)
 - [License](#license)
@@ -171,88 +169,7 @@ Detailed conversion and evidence commands live in:
 
 - Target: iOS 27 and macOS 27 with Xcode 27 and Swift 6.4.
 - Read [`AGENTS.md`](AGENTS.md) before changing code.
-- Treat [`PRODUCT.md`](PRODUCT.md) as direction, not shipped behavior.
-- Use [`CoreAIFrameworkLab.xcodeproj`](CoreAIFrameworkLab.xcodeproj/) as the
-  project source of truth; no project generator is required or supported.
 - Verify unfamiliar Core AI APIs against the selected Xcode 27 SDK before use.
-- Keep claims measurable: preference is not placement, and cache state is not
-  performance evidence.
-
-## Repository Map
-
-| Path | Purpose |
-| --- | --- |
-| [`CoreAILab/`](CoreAILab/) | SwiftUI app, feature views, workspace models, and resources. |
-| [`CoreAILabCore/`](CoreAILabCore/) | Shared runtime, persistence, conversion, recipes, pipelines, and export logic. |
-| [`CoreAILabTests/`](CoreAILabTests/) | Swift Testing suites and opt-in integration tests. |
-| [`Conversion/`](Conversion/) | Python 3.12 conversion and parity projects. |
-| [`Documentation/`](Documentation/) | Recipe-bundle guide and schema. |
-| [`Scripts/`](Scripts/) | Catalog, fixture, CI, and physical-device helpers. |
-| [`.github/ci/`](.github/ci/) | Hosted and hardware CI boundaries. |
-
-## Validation
-
-Match validation to the change. Documentation-only edits do not need a full
-Xcode build.
-
-### macOS app and Swift tests
-
-```bash
-export DEVELOPER_DIR=/Applications/Xcode-beta.app/Contents/Developer
-
-xcodebuild -project CoreAIFrameworkLab.xcodeproj \
-  -scheme CoreAILabMac \
-  -destination 'platform=macOS,arch=arm64' \
-  -derivedDataPath ./build/Xcode27 \
-  build
-
-xcodebuild -project CoreAIFrameworkLab.xcodeproj \
-  -scheme CoreAILabMac \
-  -destination 'platform=macOS,arch=arm64' \
-  -derivedDataPath ./build/Xcode27 \
-  test
-```
-
-### Script tests
-
-```bash
-python3 -m unittest discover -s Scripts/tests -p 'test_*.py'
-```
-
-### Conversion tests
-
-```bash
-cd Conversion/Chatterbox
-uv sync
-uv run pytest -q
-
-cd ../Diarization
-uv sync
-uv run pytest -q
-```
-
-### Physical iOS fixture
-
-1. Connect and unlock one iOS 27+ device.
-2. Confirm Developer Mode and existing local signing assets.
-3. Start with a dry run:
-
-   ```bash
-   export DEVELOPER_DIR=/Applications/Xcode-beta.app/Contents/Developer
-
-   python3 Scripts/run_device_tests.py \
-     --team YOUR_TEAM_ID \
-     --device YOUR_PHYSICAL_DEVICE_UDID \
-     --profile YOUR_INSTALLED_PROFILE_UUID \
-     --dry-run \
-     --evidence-json TestResults/iphone-dry-run.json
-   ```
-
-4. Remove `--dry-run`, choose a new evidence path, and rerun.
-5. Import the resulting JSON into **Device Lab**.
-
-The harness never enables provisioning updates. See
-[`.github/ci/README.md`](.github/ci/README.md) for CI and hardware-runner setup.
 
 ## Current Boundaries
 
@@ -282,7 +199,6 @@ The harness never enables provisioning updates. See
 ## Documentation
 
 - [`AGENTS.md`](AGENTS.md) — implementation and review rules
-- [`PRODUCT.md`](PRODUCT.md) — product direction and design principles
 - [`coreai.md`](coreai.md) — locally verified Xcode 27 SDK notes
 - [`Documentation/RECIPE_BUNDLES.md`](Documentation/RECIPE_BUNDLES.md) — bundle format and trust boundary
 - [`.github/ci/README.md`](.github/ci/README.md) — CI and hardware-runner contract