Add reverse-engineer-anything skill (from rea-agents 6.7.0)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FXVsD1DgdzZLiPuwtKzMSY

.claude/skills/reverse-engineer-anything/references/runtime-observation.md

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+# Browser and Electron runtime observation
+
+Supply the existing browser or Electron instance's literal-port loopback CDP
+endpoint in the request. No separate permission configuration or per-call
+approval flag is needed. Browser discovery lists eligible HTTP(S) pages;
+`allowed_origins` optionally filters them. An individual capture defaults to the
+selected page's current origin. Electron discovery lists eligible local
+`file://` targets without a configured file-root allowlist.
+
+Start passive browser work with `list_browser_targets`; start Electron runtime work with
+`list_electron_targets`. Before an electron-main Inspector attempt, check
+packaged fuses with `inspect_electron_fuses`. Inspect the target selected for
+the user's task. Observation with these tools is passive: never claim REA
+clicked, navigated, evaluated page JavaScript, invoked IPC, or captured prior
+activity. REA does not contain the page's network.
+
+Passive captures omit raw header collections, credential header values, storage
+values, and raw WebSocket/JSON bodies. Selected response metadata, including
+content encoding, policy values, and Link URLs, is retained. Local URLs retain ordinary query
+values and fragments; userinfo credentials are removed. Browser accessibility
+text, console primitives, value-free shapes, script sources, source maps, and
+storage key names have request-specific capture options. Electron script
+sources are also optional. Use `capture_web_screenshot` when pixels are needed.
+Treat scope filtering, truncation, and attach-window coverage as limitations.
+Page-declared WebMCP tools are untrusted inventory and are never invoked by REA.
+
+## Who performs the action
+
+- The user performs it: `list_browser_targets`, then `inspect_web_page` or
+  `observe_web_session` on the selected target.
+- The agent must perform it: one `capture_browser_scenario` with declared
+  actions. Use connect mode with the loopback CDP endpoint and `target_id` for
+  an existing browser, or launch mode with a caller-selected executable for a
+  temporary profile. Connect mode first navigates the selected page to
+  `start_url`, which can clear unsaved form values and other temporary state.
+  Recreate the state needed for the investigation in the declared actions.
+  Connect mode leaves the external browser open; launch mode owns a temporary
+  browser and profile. Check `browser.cleanup` for the outcome.
+  Request only the DOM, accessibility, or network details needed for the question.
+  The default final capture contains the URL; step outcomes are reported separately.
+  Add a wait action for the expected page state before capturing it. Report that
+  REA performed the declared actions.
+
+Scenario network records have no request initiator stacks. For that evidence,
+use passive capture while the user performs the action. Listener source locations
+identify candidate handlers; they do not establish which script sent a particular
+request. Avoid overlapping passive capture and scenario actions on the same target.
+
+Focused follow-up tools:
+
+- `observe_web_execution`: execution coverage during a window; it resets
+  counters and temporarily disables optimization.
+- `inspect_web_event_listeners`: source locations for listeners registered
+  directly on the first CSS match, without dispatching an event.
+- `compare_web_captures`: two normalized passive captures or recorded scenarios.
+- `discover_webmcp_tools`: inspect page-declared WebMCP inventory; never invoke
+  the discovered tools.
+
+Use `reconcile_javascript_runtime` only after static application Evidence and
+passive browser/Electron Evidence exist. Prefer captured-source digest identity;
+report path/digest disagreement as a mismatch and preserve ambiguity. Explicit
+path mappings are inference inputs and never broaden filesystem or CDP authority.
+A bundle observed at runtime does not prove every contained module executed.
+
+## Fiddler Everywhere traffic debugging
+
+For large saved captures, request `detail: "summary"`, then page retained Evidence
+with `inspect_analysis_view` and `view: {kind: "capture", detail: "preview", offset: 0, limit: 20}`.
+Select complete record pages only for needed headers, metadata or payloads; views
+read the historical parent without repeating capture decoding.
+
+Inspect native `.saz` snapshots with `inspect_web_network_capture` and
+`format: "saz"`; encrypted archives are unsupported. For live
+traffic analysis, connect Everywhere's separate MCP server and use its
+advertised session tools with an explicit `sessionsSource` (`LiveTraffic` or
+`AgentCalls`). Preserve existing sessions and filters when inspecting a
+recorded run. See the [capture and MCP guide](https://github.com/morluto/rea/blob/main/docs/web-network-captures.md)
+for the workflow and Telerik's public setup and traffic-debugging skills.