{
  "slug": "agent-browser-snapshot-delta-returns-structural-changes-da9c071b3e02",
  "title": "agent-browser snapshot --delta returns structural changes",
  "tools": [
    "agent-browser"
  ],
  "tags": [
    "agent"
  ],
  "introduced_at": "2026-09-16T13:24:39.000Z",
  "announced_at": "2026-09-16T13:24:39.000Z",
  "effective_at": null,
  "date_basis": "source-publication",
  "status": "unknown",
  "how": {
    "incantation": "When inspecting a page across browser interactions, run `agent-browser snapshot --delta` for an initial full snapshot and subsequent unchanged revisions or structural changes. Reuse refs for surviving DOM elements across same-document updates; run `agent-browser snapshot --delta --full` to refresh the baseline and take a fresh snapshot after navigation or to observe page changes.",
    "examples": [
      "agent-browser snapshot --delta",
      "agent-browser snapshot --delta --full"
    ],
    "gotchas": [
      "Version: v0.38.0",
      "--delta: Return full state once, then unchanged or structural deltas; history is per tab and option set.",
      "--full: Force full state and update the delta baseline; documented with `--delta`.",
      "Virtual accessibility nodes have snapshot-local refs."
    ]
  },
  "why_it_matters": "When inspecting a page across browser interactions, retrieve compact snapshot changes while retaining usable references to surviving elements.",
  "sources": [
    "https://github.com/vercel-labs/agent-browser/releases/tag/v0.38.0",
    "https://github.com/vercel-labs/agent-browser/pull/1812",
    "https://github.com/vercel-labs/agent-browser/blob/main/README.md"
  ],
  "rank": 0.98055,
  "judge": {
    "publish": true,
    "judge_model": "codex-cli/gpt-6-luna+typesafe/jev-1.13.0",
    "prompt_version": "extract-v7+enrich-v2+judge-v2x3+jev-publish-v1"
  },
  "review_state": "approved",
  "provenance": {
    "run_id": "wave2a-20261017",
    "verdict_id": "wave2a-20261017:wave2a-20261017-d56cb04dda1b975a-1:gate",
    "evidence_hash": "a78eeaf06b04ec4434fed43f842b5a8fc3097ef2d667ca2c525fc6bf9efac0cb"
  },
  "review": {
    "draft_hash": "241f2d4c15b484b97867c782ea4241a50714ce393fc7269a66743afc14aab0ef",
    "reviewer": "publication-gate",
    "reviewed_at": "2026-10-07T00:00:00.000Z",
    "decision": "wave2a-20261017:gate",
    "reason": "3 of 3 judge runs approved with p_yes >= 0.9 (mean 0.98 >= 0.9; 2 needed) and Jev gave 0.81 (>= 0.6 needed)."
  }
}