changed_symbols

[review]

Maps diff ranges to changed declarations in supported syntax languages.

Parameters

Name	Type	Required	Description
responseDetail	string	No	compact returns results and actionable state. full returns the original envelope with timing, revision, and display annotations. Default: `"compact"`
hunks	json	Yes	Changed regions. Each side that exists supplies its path and full file text; the side that changed also supplies a { startLine, endLine } range (1-based, inclusive). Omit a side only when the file did not exist there. A rename carries both paths in one hunk.
skip	number	No	Detail page offset over the classified declarations. The summary and totals cover the whole diff. Default: `0`
take	number	No	Detail page size (default 50), clamped to the configured maximum. Default: `50`

Examples

Replace sample paths and symbol keys with values from your workspace.

Resolve an edited function

Arguments 
{
  "hunks": [
    {
      "beforePath": "src/lib.rs",
      "beforeText": "fn f() {}\n",
      "beforeRange": {
        "startLine": 1,
        "endLine": 1
      },
      "afterPath": "src/lib.rs",
      "afterText": "fn f() { work(); }\n",
      "afterRange": {
        "startLine": 1,
        "endLine": 1
      }
    }
  ]
}

Full MCP request

Full MCP request 
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "changed_symbols",
    "arguments": {
      "hunks": [
        {
          "beforePath": "src/lib.rs",
          "beforeText": "fn f() {}\n",
          "beforeRange": {
            "startLine": 1,
            "endLine": 1
          },
          "afterPath": "src/lib.rs",
          "afterText": "fn f() { work(); }\n",
          "afterRange": {
            "startLine": 1,
            "endLine": 1
          }
        }
      ]
    }
  }
}

Response Notes

Supply each hunk with both sides' full file text inline, and a range on whichever side changed. A declaration is added only when the other side's whole file lacks it, removed for the mirror, else unknown. So an inserted line reads as a change, not a new function. A rename carries both paths in one hunk, and each result adds the nearest externally-addressable ancestor when it differs. Scout is structural, so it never emits body-only or signature-changed and carries no stable symbol key; blast radius arrives with the navigation tier.

Returns symbols — the classified changed declarations with spans, the addressable ancestor, and generated and vendored flags. A summary with per-classification totals, paging, and coverage (unsupported-language files, hunks with no declaration, workspace-loaded) come alongside.