{
  "schema_version": 1,
  "targets": [
    {"id":"win-chrome","device":"Lenovo ThinkPad T14 Gen 2 Intel","cpu":"Intel Core i5-1135G7","ram_gib":16,"os":"Windows 11 24H2 x64","browser":"Chrome","minimum_major":111,"channel":"stable","viewport_css":[1366,768],"dpr":1,"hz":60,"modes":["tab","installed"],"budget":"desktop"},
    {"id":"win-edge","device":"Lenovo ThinkPad T14 Gen 2 Intel","cpu":"Intel Core i5-1135G7","ram_gib":16,"os":"Windows 11 24H2 x64","browser":"Edge","minimum_major":111,"channel":"stable","viewport_css":[1366,768],"dpr":1,"hz":60,"modes":["tab","installed"],"budget":"desktop"},
    {"id":"linux-firefox","device":"Lenovo ThinkPad T14 Gen 2 Intel","cpu":"Intel Core i5-1135G7","ram_gib":16,"os":"Ubuntu 24.04 LTS x64 GNOME Wayland","browser":"Firefox","minimum_major":114,"channel":"stable","viewport_css":[1366,768],"dpr":1,"hz":60,"modes":["tab"],"budget":"desktop"},
    {"id":"mac-safari","device":"MacBook Air 13-inch M1 2020","cpu":"Apple M1 8-core CPU / 7-core GPU","ram_gib":8,"os":"macOS 15","browser":"Safari","minimum_major":18,"channel":"stable","viewport_css":[1280,800],"dpr":2,"hz":60,"modes":["tab","installed"],"budget":"desktop"},
    {"id":"android-chrome","device":"Google Pixel 6a 128GB","cpu":"Google Tensor","ram_gib":6,"os":"Android 15","browser":"Chrome","minimum_major":111,"channel":"stable","viewport_css":[393,851],"dpr":2.75,"hz":60,"modes":["tab","installed"],"budget":"mobile"},
    {"id":"ios-safari","device":"Apple iPhone 13 128GB","cpu":"Apple A15 Bionic","ram_gib":4,"os":"iOS 18","browser":"Safari","minimum_major":18,"channel":"stable","viewport_css":[390,844],"dpr":3,"hz":60,"modes":["tab","home-screen"],"budget":"mobile"}
  ],
  "freeze_fields":["target_id","run_utc","device_model","cpu","ram_gib","os_full_build","browser_full_build","browser_channel","installer_source","installer_sha256_or_os_build","viewport_css","actual_inner_size_css","dpr","refresh_hz","display_mode","app_commit","asset_sha256","fixture_sha256","profile_reset_recipe","network_profile","measurement_tool_version"],
  "budgets": {
    "desktop":{"cold_start_p95_ms":2500,"warm_start_p95_ms":1200,"interaction_p95_ms":100,"raf_gap_p95_ms":20,"raf_gap_max_ms":100,"ram_peak_mib":350,"ram_growth_mib":30,"cache_mib":128},
    "mobile":{"cold_start_p95_ms":4000,"warm_start_p95_ms":2000,"interaction_p95_ms":150,"raf_gap_p95_ms":25,"raf_gap_max_ms":150,"ram_peak_mib":250,"ram_growth_mib":25,"cache_mib":64}
  },
  "fallbacks": {
    "secure-context":{"detection":"isSecureContext false / endpoint TLS failure","fallback":"Block login and protected operations; explain HTTPS/WSS requirement; never bypass certificates."},
    "crypto-worker-wasm":{"detection":"Required WebCrypto, Worker, WASM initialization or self-test fails","fallback":"Block encrypted send/unlock; show unsupported capability; never plaintext or fake crypto."},
    "indexeddb":{"detection":"Open/transaction fails including private-mode policy or quota","fallback":"Report local save failure; no checkpoint advance; preserve bounded pending memory; explicit recovery per ADR 0004."},
    "persistence":{"detection":"persist absent/false; estimate absent or quota smaller than cache budget","fallback":"Explain best-effort storage and loss risk; lower disposable cache limit; never delete crypto or unsynced history."},
    "push":{"detection":"Service worker/PushManager/Notifications missing, denied, revoked, subscription invalid, provider absent or iOS ordinary tab","fallback":"Disable background notification claim; show active-tab unread UI; offer Home Screen setup on iOS only by user action."},
    "install":{"detection":"No install prompt or standalone mode","fallback":"Continue supported tab UI; show manual browser install instructions only where applicable."},
    "media":{"detection":"getUserMedia/WebRTC absent, NotAllowedError, NotFoundError, NotReadableError or track ended","fallback":"Stop affected capture/call state, release tracks, explain reason; retain text; offer audio only if microphone actually works."},
    "recording-codec":{"detection":"MediaRecorder absent or isTypeSupported false; runtime encoder/decoder fails","fallback":"Disable affected recording/playback with explanation; allow supported file selection/download; do not claim a sent recording."},
    "geolocation":{"detection":"API absent, denied, timeout, unavailable or revoked","fallback":"Stop watch, show failure, permit explicit manual location entry; never invent coordinates."},
    "webauthn":{"detection":"PublicKeyCredential missing, authenticator unavailable, cancel or failure","fallback":"Offer only accepted S00-007 unlock alternative; otherwise stay locked; no claim of hardware vault."},
    "permissions-query":{"detection":"navigator.permissions absent or query descriptor rejects","fallback":"Use contextual API request after user gesture and observe its real result; no granted-state inference."},
    "lifecycle":{"detection":"hidden, frozen, discarded, offline or closed tab","fallback":"No socket/media continuity promise; reconcile actual state on resume; closed-tab push remains conditional per ADR 0000."}
  }
}