{
 "fps": 30,
 "duration": 56.8,
 "session": {
  "model": "claude-opus-5",
  "server": "weftcut",
  "turns": 49,
  "wall_ms": 262713,
  "calls": 38,
  "errors": 3
 },
 "prompt": "Cut “Aurora Ridge” — a 15-second night-sky teaser — from the four clips in ~/Videos: three acts on the A roll, an embers B-roll with an eased fade and a gentle blur, a crossfade and a wipe, a lower third, three captions, a marker and a checkpoint. One of the clips has dead air — find it.",
 "final": "\"Aurora Ridge\" is cut and checkpointed at 15.0s on a 1920×1080@30 timeline. Three acts run back to back on the A roll: **Night sky** (aurora, src 3.0–8.0s, deliberately windowed so the shooting star lands ~3.6s into the teaser), **First light** (ridgeline, src 2.0–7.0s), and **Still water** (lakeside, src 2.5–7.5s) — joined by an 0.8s crossfade at 5s and an 0.7s leftward wipe at 10s, each transition auto-extending the outgoing clip into its available tail. Act two carries a slow push-in, scale 1 → 1.06 keyframed on both axes across 5.0–10.7s and eased with smoothed tangents. Embers sits on the B roll from 1.0s under a four-point eased opacity ramp (0 → 0.35 → 0.35 → 0) plus a blur effect; `detect_silences` reported dead air from 5.01s to 6.5s, so I trimmed the out edge back to 5.0s, keeping only the live-crackle first 4s of source. The `lower-third` motif runs 0.8–4.5s with title \"Aurora Ridge\", subtitle \"Cut by an agent over MCP\" and accent `#6696E6`, three marketing captions land at 1.2s, 6.0s and 11.2s, and a `#6696E6` marker named \"Agent cut v1\" sits at 0.\n\nTwo things to flag. First, embers' paired audio was rejected with \"layer overlap\" — the auto-pairing puts every clip's audio on the *B roll* track, which was already occupied at that span by the aurora and ridgeline audio; the embers **video** layer committed fine, so rather than re-place it I left it silent (fitting for a B-roll texture) and ran `detect_silences` against the video layer id as your notes allow. There is no orphaned audio sliver. Second, I could not set the blur's strength: `update_effect` carries its whole payload in the untyped `patch` field, which this client force-serializes to a string — the server then leniently ignores it and returns success, leaving `params: {}` (verified via `project://layers/...`). The `set_param_track` fallback failed explicitly with `\"invalid track: not an object\"`, confirming the cause. Since your notes ruled out keyframing effect params, the blur is added and enabled but running at its catalog default rather than ~4; that same stringification quirk affects any tool whose payload lives entirely in an untyped field.",
 "events": [
  {
   "t": 0,
   "kind": "say",
   "text": "I'll start by loading the WeftCut MCP tool schemas."
  },
  {
   "t": 0.2,
   "kind": "call",
   "name": "ToolSearch",
   "display": "Search tools",
   "params": "\"+weftcut import media add clip track layer\"",
   "ms": 11,
   "out": [],
   "more": 0,
   "aux": true
  },
  {
   "t": 0.54,
   "kind": "call",
   "name": "ToolSearch",
   "display": "Search tools",
   "params": "\"+weftcut keyframe effect motif subtitle marker checkpoint silence transition\"",
   "ms": 1,
   "out": [],
   "more": 0,
   "aux": true
  },
  {
   "t": 0.88,
   "kind": "call",
   "name": "ToolSearch",
   "display": "Search tools",
   "params": "\"+weftcut read resource project tracks current\"",
   "ms": 9,
   "out": [],
   "more": 0,
   "aux": true
  },
  {
   "t": 1.21,
   "kind": "call",
   "name": "ToolSearch",
   "display": "Search tools",
   "params": "\"select:ReadMcpResourceTool\"",
   "ms": 10,
   "out": [],
   "more": 0,
   "aux": true
  },
  {
   "t": 1.9,
   "kind": "call",
   "name": "ReadMcpResourceTool",
   "display": "Read MCP resource",
   "params": "weftcut, project://tracks",
   "ms": 8,
   "out": [
    "[",
    "  {",
    "    \"id\": \"019fc88f-37dd-7d35-a33f-c39b8fd0980b\","
   ],
   "more": 25,
   "aux": true
  },
  {
   "t": 1.9,
   "kind": "call",
   "name": "list_motifs",
   "display": "weftcut - list_motifs (MCP)",
   "params": "",
   "ms": 9,
   "out": [
    "[{\"content_hash\":\"4663ecf9aba3ebe2a2f23406dac249853215119d9bfd21b59f48902c43600ec1\",\"default_du…"
   ],
   "more": 0
  },
  {
   "t": 3.07,
   "kind": "call",
   "name": "import_media",
   "display": "weftcut - import_media (MCP)",
   "params": "path: \"~/Videos/WeftCut-demo/footage/aurora.mp4\"",
   "ms": 70,
   "out": [
    "7dc15341-318d-46d0-a6d2-c2af73bb7213"
   ],
   "more": 0
  },
  {
   "t": 3.2,
   "kind": "call",
   "name": "import_media",
   "display": "weftcut - import_media (MCP)",
   "params": "path: \"~/Videos/WeftCut-demo/footage/ridgeline.mp4\"",
   "ms": 97,
   "out": [
    "69974eb3-65c3-4e69-9906-e59412f653a7"
   ],
   "more": 0
  },
  {
   "t": 4.07,
   "kind": "call",
   "name": "import_media",
   "display": "weftcut - import_media (MCP)",
   "params": "path: \"~/Videos/WeftCut-demo/footage/lakeside.mp4\"",
   "ms": 130,
   "out": [
    "b3d76708-e033-4ca9-9185-4a3cc241f853"
   ],
   "more": 0
  },
  {
   "t": 4.21,
   "kind": "call",
   "name": "import_media",
   "display": "weftcut - import_media (MCP)",
   "params": "path: \"~/Videos/WeftCut-demo/footage/embers.mp4\"",
   "ms": 244,
   "out": [
    "24b43a8f-4cc2-4d85-ba44-69cb710e71d7"
   ],
   "more": 0
  },
  {
   "t": 4.98,
   "kind": "say",
   "text": "Tracks: A roll `019fc88f-37dd-7d35...`, B roll `019fc88f-37dd-79d2...`. Motif `lower-third` takes `{title, subtitle, accent, align}`. Placing the three acts:"
  },
  {
   "t": 5.38,
   "kind": "call",
   "name": "add_video_layer",
   "display": "weftcut - add_video_layer (MCP)",
   "params": "media_id: \"7dc15341-318d-46d0-a6d2-c2af73bb7213\", track_id: \"019fc88f-37dd-7d35-a33f-c39b8fd0980b\", src_in_us: 3000000, src_out_us: 8000000, t_start_us: 0, t_end_us: 5000000",
   "ms": 10,
   "out": [
    "{\"audio_layer_id\":\"019fc890-a93e-7fda-a6fc-5af7075ae4af\",\"group_id\":\"019fc890-a93f-7252-8ddc-98…"
   ],
   "more": 0
  },
  {
   "t": 6.55,
   "kind": "call",
   "name": "add_video_layer",
   "display": "weftcut - add_video_layer (MCP)",
   "params": "media_id: \"69974eb3-65c3-4e69-9906-e59412f653a7\", track_id: \"019fc88f-37dd-7d35-a33f-c39b8fd0980b\", src_in_us: 2000000, src_out_us: 7000000, t_start_us: 5000000, t_end_us: 10000000",
   "ms": 11,
   "out": [
    "{\"audio_layer_id\":\"019fc890-b09c-7627-98ef-7aaa54f7d617\",\"group_id\":\"019fc890-b09d-77ce-b841-1d…"
   ],
   "more": 0
  },
  {
   "t": 7.71,
   "kind": "call",
   "name": "add_video_layer",
   "display": "weftcut - add_video_layer (MCP)",
   "params": "media_id: \"b3d76708-e033-4ca9-9185-4a3cc241f853\", track_id: \"019fc88f-37dd-7d35-a33f-c39b8fd0980b\", src_in_us: 2500000, src_out_us: 7500000, t_start_us: 10000000, t_end_us: 15000000",
   "ms": 8,
   "out": [
    "{\"audio_layer_id\":\"019fc890-b523-71ef-97e4-3bac31ab4d96\",\"group_id\":\"019fc890-b524-7872-87ab-6b…"
   ],
   "more": 0
  },
  {
   "t": 8.88,
   "kind": "call",
   "name": "add_video_layer",
   "display": "weftcut - add_video_layer (MCP)",
   "params": "media_id: \"24b43a8f-4cc2-4d85-ba44-69cb710e71d7\", track_id: \"019fc88f-37dd-79d2-89f7-bea96d11eb94\", src_in_us: 0, src_out_us: 5500000, t_start_us: 1000000, t_end_us: 6500000",
   "ms": 17,
   "out": [
    "Error: MCP error -32602: layer overlap"
   ],
   "more": 0,
   "error": true
  },
  {
   "t": 10.05,
   "kind": "call",
   "name": "update_layer",
   "display": "weftcut - update_layer (MCP)",
   "params": "layer_id: \"019fc890-a93e-712a-8a31-4fc216aeda9d\", patch: {\"label\":\"Night sky\"}",
   "ms": 264,
   "out": [
    "(No content)"
   ],
   "more": 0
  },
  {
   "t": 10.4,
   "kind": "call",
   "name": "update_layer",
   "display": "weftcut - update_layer (MCP)",
   "params": "layer_id: \"019fc890-b09b-7e2f-8e35-cb7d5b78d4a6\", patch: {\"label\":\"First light\"}",
   "ms": 7,
   "out": [
    "(No content)"
   ],
   "more": 0
  },
  {
   "t": 10.87,
   "kind": "call",
   "name": "update_layer",
   "display": "weftcut - update_layer (MCP)",
   "params": "layer_id: \"019fc890-b522-7ead-a41b-205db8565cfa\", patch: {\"label\":\"Still water\"}",
   "ms": 8,
   "out": [
    "(No content)"
   ],
   "more": 0
  },
  {
   "t": 11.74,
   "kind": "call",
   "name": "add_motif",
   "display": "weftcut - add_motif (MCP)",
   "params": "motif_id: \"lower-third\", t_start_us: 800000, t_end_us: 4500000",
   "ms": 8,
   "out": [
    "019fc890-e827-729d-95ba-c00fa1dbda04"
   ],
   "more": 0
  },
  {
   "t": 12.51,
   "kind": "say",
   "text": "Embers placement hit an overlap on an empty B roll — I need to see where the paired audio landed before re-planning."
  },
  {
   "t": 12.51,
   "kind": "say",
   "text": "Diagnosed: the paired audio all landed on the B roll track, so embers' **video** did place (1.0–6.5s) — only its audio pairing was rejected. No orphan, and no re-place needed. Continuing:"
  },
  {
   "t": 12.56,
   "kind": "call",
   "name": "ReadMcpResourceTool",
   "display": "Read MCP resource",
   "params": "weftcut, project://tracks",
   "ms": 6,
   "out": [
    "[",
    "  {",
    "    \"id\": \"019fc88f-37dd-7d35-a33f-c39b8fd0980b\","
   ],
   "more": 394,
   "aux": true
  },
  {
   "t": 12.91,
   "kind": "call",
   "name": "update_layer_params",
   "display": "weftcut - update_layer_params (MCP)",
   "params": "layer_id: \"019fc890-e827-729d-95ba-c00fa1dbda04\", patch: {\"kind\":\"Motif\",\"props\":{\"title\":\"Aurora Ridge\",\"subtitle\":\"Cut by an agent over MCP\",\"accent\":\"#6696E6\",\"align\":\"left\"}}",
   "ms": 7,
   "out": [
    "(No content)"
   ],
   "more": 0
  },
  {
   "t": 13.38,
   "kind": "call",
   "name": "update_layer",
   "display": "weftcut - update_layer (MCP)",
   "params": "layer_id: \"019fc890-db8d-7b26-aaee-d4646617686e\", patch: {\"label\":\"Embers\"}",
   "ms": 8,
   "out": [
    "(No content)"
   ],
   "more": 0
  },
  {
   "t": 14.55,
   "kind": "call",
   "name": "add_transition",
   "display": "weftcut - add_transition (MCP)",
   "params": "from_layer_id: \"019fc890-a93e-712a-8a31-4fc216aeda9d\", to_layer_id: \"019fc890-b09b-7e2f-8e35-cb7d5b78d4a6\", kind: \"Crossfade\", duration_us: 800000",
   "ms": 17,
   "out": [
    "019fc891-6b76-7342-90d5-3c80ecf9efcc"
   ],
   "more": 0
  },
  {
   "t": 15.72,
   "kind": "call",
   "name": "add_transition",
   "display": "weftcut - add_transition (MCP)",
   "params": "from_layer_id: \"019fc890-b09b-7e2f-8e35-cb7d5b78d4a6\", to_layer_id: \"019fc890-b522-7ead-a41b-205db8565cfa\", kind: \"Wipe\", direction: \"left\", duration_us: 700000",
   "ms": 5,
   "out": [
    "019fc891-72e3-7e16-bc46-0120fb2afa9d"
   ],
   "more": 0
  },
  {
   "t": 16.28,
   "kind": "call",
   "name": "detect_silences",
   "display": "weftcut - detect_silences (MCP)",
   "params": "layer_id: \"019fc890-db8d-7b26-aaee-d4646617686e\"",
   "ms": 7,
   "out": [
    "[{\"t_start_us\":5014875,\"t_end_us\":6500000}]"
   ],
   "more": 0
  },
  {
   "t": 17.05,
   "kind": "say",
   "text": "Dead air found at 5.01s–6.5s on the timeline (source ~4.0s onward). Trimming the embers slice back to the live-audio portion:"
  },
  {
   "t": 17.45,
   "kind": "call",
   "name": "trim_layer",
   "display": "weftcut - trim_layer (MCP)",
   "params": "layer_id: \"019fc890-db8d-7b26-aaee-d4646617686e\", edge: \"out\", new_t_us: 5000000",
   "ms": 15,
   "out": [
    "(No content)"
   ],
   "more": 0
  },
  {
   "t": 18.19,
   "kind": "call",
   "name": "add_effect",
   "display": "weftcut - add_effect (MCP)",
   "params": "layer_id: \"019fc890-db8d-7b26-aaee-d4646617686e\", kind: \"blur\"",
   "ms": 9,
   "out": [
    "019fc891-c343-7210-bb7b-80dce41c24d3"
   ],
   "more": 0
  },
  {
   "t": 19.15,
   "kind": "call",
   "name": "set_keyframe",
   "display": "weftcut - set_keyframe (MCP)",
   "params": "layer_id: \"019fc890-b09b-7e2f-8e35-cb7d5b78d4a6\", param_key: \"scale_x\", t_us: 5000000, value: 1",
   "ms": 8,
   "out": [
    "(No content)"
   ],
   "more": 0
  },
  {
   "t": 20.32,
   "kind": "call",
   "name": "set_keyframe",
   "display": "weftcut - set_keyframe (MCP)",
   "params": "layer_id: \"019fc890-b09b-7e2f-8e35-cb7d5b78d4a6\", param_key: \"scale_x\", t_us: 10700000, value: 1.06",
   "ms": 11,
   "out": [
    "(No content)"
   ],
   "more": 0
  },
  {
   "t": 21.47,
   "kind": "call",
   "name": "set_keyframe",
   "display": "weftcut - set_keyframe (MCP)",
   "params": "layer_id: \"019fc890-b09b-7e2f-8e35-cb7d5b78d4a6\", param_key: \"scale_y\", t_us: 5000000, value: 1",
   "ms": 7,
   "out": [
    "(No content)"
   ],
   "more": 0
  },
  {
   "t": 22.19,
   "kind": "call",
   "name": "set_keyframe",
   "display": "weftcut - set_keyframe (MCP)",
   "params": "layer_id: \"019fc890-b09b-7e2f-8e35-cb7d5b78d4a6\", param_key: \"scale_y\", t_us: 10700000, value: 1.06",
   "ms": 8,
   "out": [
    "(No content)"
   ],
   "more": 0
  },
  {
   "t": 23.36,
   "kind": "call",
   "name": "set_keyframe",
   "display": "weftcut - set_keyframe (MCP)",
   "params": "layer_id: \"019fc890-db8d-7b26-aaee-d4646617686e\", param_key: \"opacity\", t_us: 1000000, value: 0",
   "ms": 8,
   "out": [
    "(No content)"
   ],
   "more": 0
  },
  {
   "t": 24.53,
   "kind": "call",
   "name": "set_keyframe",
   "display": "weftcut - set_keyframe (MCP)",
   "params": "layer_id: \"019fc890-db8d-7b26-aaee-d4646617686e\", param_key: \"opacity\", t_us: 1800000, value: 0.35",
   "ms": 7,
   "out": [
    "(No content)"
   ],
   "more": 0
  },
  {
   "t": 25.41,
   "kind": "call",
   "name": "set_keyframe",
   "display": "weftcut - set_keyframe (MCP)",
   "params": "layer_id: \"019fc890-db8d-7b26-aaee-d4646617686e\", param_key: \"opacity\", t_us: 4200000, value: 0.35",
   "ms": 45,
   "out": [
    "(No content)"
   ],
   "more": 0
  },
  {
   "t": 26.34,
   "kind": "call",
   "name": "set_keyframe",
   "display": "weftcut - set_keyframe (MCP)",
   "params": "layer_id: \"019fc890-db8d-7b26-aaee-d4646617686e\", param_key: \"opacity\", t_us: 4999000, value: 0",
   "ms": 9,
   "out": [
    "(No content)"
   ],
   "more": 0
  },
  {
   "t": 27.36,
   "kind": "call",
   "name": "update_effect",
   "display": "weftcut - update_effect (MCP)",
   "params": "layer_id: \"019fc890-db8d-7b26-aaee-d4646617686e\", effect_id: \"019fc891-c343-7210-bb7b-80dce41c24d3\", patch: \"{\\\"params\\\": {\\\"strength\\\": {\\\"mode\\\": \\\"Static\\\", \\\"value\\\": 4}}}\"",
   "ms": 8,
   "out": [
    "(No content)"
   ],
   "more": 0
  },
  {
   "t": 28.53,
   "kind": "call",
   "name": "smooth_keyframes",
   "display": "weftcut - smooth_keyframes (MCP)",
   "params": "layer_id: \"019fc890-db8d-7b26-aaee-d4646617686e\", param_key: \"opacity\"",
   "ms": 8,
   "out": [
    "(No content)"
   ],
   "more": 0
  },
  {
   "t": 29.47,
   "kind": "call",
   "name": "smooth_keyframes",
   "display": "weftcut - smooth_keyframes (MCP)",
   "params": "layer_id: \"019fc890-b09b-7e2f-8e35-cb7d5b78d4a6\", param_key: \"scale_x\"",
   "ms": 9,
   "out": [
    "(No content)"
   ],
   "more": 0
  },
  {
   "t": 30.41,
   "kind": "call",
   "name": "smooth_keyframes",
   "display": "weftcut - smooth_keyframes (MCP)",
   "params": "layer_id: \"019fc890-b09b-7e2f-8e35-cb7d5b78d4a6\", param_key: \"scale_y\"",
   "ms": 6,
   "out": [
    "(No content)"
   ],
   "more": 0
  },
  {
   "t": 31.58,
   "kind": "call",
   "name": "apply_subtitles",
   "display": "weftcut - apply_subtitles (MCP)",
   "params": "format: \"srt\", t_end_us: 15000000, body: \"1\\n00:00:01,200 --> 00:00:04,200\\nAurora Ridge — cut by an agent\\n\\n2\\n00:00:06,000 --> 00:00:09,200\\nEvery move lands on the timeline live\\n\\n3\\n00:00:11,200 --> 00:00:14,600\\nWeftCut — the agent-native editor\\n\"",
   "ms": 10,
   "out": [
    "019fc892-2a5b-7734-9e59-8281e3d0fcf8"
   ],
   "more": 0
  },
  {
   "t": 32.49,
   "kind": "call",
   "name": "add_marker",
   "display": "weftcut - add_marker (MCP)",
   "params": "label: \"Agent cut v1\", t_us: 0, color: {\"r\":102,\"g\":150,\"b\":230,\"a\":255}",
   "ms": 9,
   "out": [
    "019fc892-2de6-7c38-a7a4-c24f684979ea"
   ],
   "more": 0
  },
  {
   "t": 33.26,
   "kind": "say",
   "text": "Now the sanity-check read before the checkpoint:"
  },
  {
   "t": 33.26,
   "kind": "say",
   "text": "Everything landed except the blur strength — `params` is still `{}`. Fixing that:"
  },
  {
   "t": 33.31,
   "kind": "call",
   "name": "ReadMcpResourceTool",
   "display": "Read MCP resource",
   "params": "weftcut, project://current",
   "ms": 9,
   "out": [
    "{",
    "  \"schema_version\": 10,",
    "  \"project_id\": \"019fc88f-37dd-74f3-beeb-cfbb4b71c1bc\","
   ],
   "more": 1043,
   "aux": true
  },
  {
   "t": 33.66,
   "kind": "call",
   "name": "update_effect",
   "display": "weftcut - update_effect (MCP)",
   "params": "layer_id: \"019fc890-db8d-7b26-aaee-d4646617686e\", effect_id: \"019fc891-c343-7210-bb7b-80dce41c24d3\", patch: \"{\\\"enabled\\\": true, \\\"params\\\": {\\\"strength\\\": {\\\"mode\\\": \\\"Static\\\", \\\"value\\\": 4.0}}}\"",
   "ms": 14,
   "out": [
    "(No content)"
   ],
   "more": 0
  },
  {
   "t": 34.83,
   "kind": "call",
   "name": "get_param_track",
   "display": "weftcut - get_param_track (MCP)",
   "params": "layer_id: \"019fc890-db8d-7b26-aaee-d4646617686e\", param_key: \"effects[019fc891-c343-7210-bb7b-80dce41c24d3].params[strength]\"",
   "ms": 10,
   "out": [
    "Error: MCP error -32602: UnknownKeyframeParam"
   ],
   "more": 0,
   "error": true
  },
  {
   "t": 35.6,
   "kind": "say",
   "text": "`update_effect`'s payload rides entirely in the untyped `patch` field — this client stringifies it and the server silently ignores it (returns success, `params` stays `{}`). Trying the alternate route:"
  },
  {
   "t": 35.65,
   "kind": "call",
   "name": "ListMcpResourcesTool",
   "display": "List MCP resources",
   "params": "weftcut",
   "ms": 4,
   "out": [
    "[{\"name\":\"Current project\",\"uri\":\"project://current\",\"description\":\"The full open WeftCut proje…"
   ],
   "more": 0,
   "aux": true
  },
  {
   "t": 35.65,
   "kind": "call",
   "name": "ReadMcpResourceTool",
   "display": "Read MCP resource",
   "params": "weftcut, project://layers/019fc890-db8d-7b26-aaee-d4646617686e",
   "ms": 5,
   "out": [
    "{",
    "  \"id\": \"019fc890-db8d-7b26-aaee-d4646617686e\",",
    "  \"label\": \"Embers\","
   ],
   "more": 107,
   "aux": true
  },
  {
   "t": 36,
   "kind": "call",
   "name": "set_param_track",
   "display": "weftcut - set_param_track (MCP)",
   "params": "layer_id: \"019fc890-db8d-7b26-aaee-d4646617686e\", param_key: \"effects[019fc891-c343-7210-bb7b-80dce41c24d3].params[strength]\", track: \"{\\\"mode\\\": \\\"Static\\\", \\\"value\\\": 4}\"",
   "ms": 7,
   "out": [
    "Error: MCP error -32602: invalid track: not an object"
   ],
   "more": 0,
   "error": true
  },
  {
   "t": 36.77,
   "kind": "say",
   "text": "Confirmed — `\"invalid track: not an object\"` proves the untyped fields arrive as strings. Blur strength isn't reachable from this client; the effect stays added and enabled at its catalog default. Finishing with the checkpoint:"
  },
  {
   "t": 37.17,
   "kind": "call",
   "name": "checkpoint",
   "display": "weftcut - checkpoint (MCP)",
   "params": "label: \"Agent cut v1\"",
   "ms": 6,
   "out": [
    "019fc893-7759-72e7-ae8f-c50ea3ea7c86"
   ],
   "more": 0
  },
  {
   "t": 38.57,
   "kind": "final",
   "text": "\"Aurora Ridge\" is cut and checkpointed at 15.0s on a 1920×1080@30 timeline. Three acts run back to back on the A roll: **Night sky** (aurora, src 3.0–8.0s, deliberately windowed so the shooting star lands ~3.6s into the teaser), **First light** (ridgeline, src 2.0–7.0s), and **Still water** (lakeside, src 2.5–7.5s) — joined by an 0.8s crossfade at 5s and an 0.7s leftward wipe at 10s, each transition auto-extending the outgoing clip into its available tail. Act two carries a slow push-in, scale 1 → 1.06 keyframed on both axes across 5.0–10.7s and eased with smoothed tangents. Embers sits on the B roll from 1.0s under a four-point eased opacity ramp (0 → 0.35 → 0.35 → 0) plus a blur effect; `detect_silences` reported dead air from 5.01s to 6.5s, so I trimmed the out edge back to 5.0s, keeping only the live-crackle first 4s of source. The `lower-third` motif runs 0.8–4.5s with title \"Aurora Ridge\", subtitle \"Cut by an agent over MCP\" and accent `#6696E6`, three marketing captions land at 1.2s, 6.0s and 11.2s, and a `#6696E6` marker named \"Agent cut v1\" sits at 0."
  },
  {
   "t": 46.44,
   "kind": "final",
   "text": "Two things to flag. First, embers' paired audio was rejected with \"layer overlap\" — the auto-pairing puts every clip's audio on the *B roll* track, which was already occupied at that span by the aurora and ridgeline audio; the embers **video** layer committed fine, so rather than re-place it I left it silent (fitting for a B-roll texture) and ran `detect_silences` against the video layer id as your notes allow. There is no orphaned audio sliver. Second, I could not set the blur's strength: `update_effect` carries its whole payload in the untyped `patch` field, which this client force-serializes to a string — the server then leniently ignores it and returns success, leaving `params: {}` (verified via `project://layers/...`). The `set_param_track` fallback failed explicitly with `\"invalid track: not an object\"`, confirming the cause. Since your notes ruled out keyframing effect params, the blur is added and enabled but running at its catalog default rather than ~4; that same stringification quirk affects any tool whose payload lives entirely in an untyped field."
  }
 ]
}