Reference

ctx_delta

Input contract and parameters for ctx_delta.

Status by featureReviewed September 2026

MCP tool · Read, search & shell

Call this tool through your MCP client. Its availability depends on your active configuration and profile.

This registry contract is separate from the SDK. For terminal commands, use the CLI reference.

Parameters

Generated from the registered input schema. “Required” reflects the schema; individual actions can impose additional requirements.

pathstringRequired

File path

Exact JSON schema

Inspect the complete input schema

{
  "properties": {
    "path": {
      "description": "File path",
      "type": "string"
    }
  },
  "required": [
    "path"
  ],
  "type": "object"
}

Runtime description

The following is the tool's own agent-facing description, reproduced from the reviewed registry. It can contain implementation terminology; it does not expand the public stability commitment.

Read the agent-facing description

Incremental diff since last read — shows only changed lines after you edit.
WORKFLOW: ctx_read(mode=full) -> edit -> ctx_delta (no re-read needed).
Use INSTEAD of re-reading the whole file after modifications — it returns only changed
lines and avoids resending unchanged content. Path must have a prior ctx_read in this session's cache.
ctx_read(mode=diff) diffs this same cache, not git; for HEAD use git diff.

Sources & versions3 references Reviewed 18 Sept 2026

mcp_manifest.rsrust/src/core/mcp_manifest.rsReviewed checkout
registry.rsrust/src/server/registry.rsReviewed checkout
dynamic_tools.rsrust/src/server/dynamic_tools.rsReviewed checkout

Core checkout: 50fbff09c9
Installed runtime: 3.10.2
SDK release: 1.1.0

Separate baselines for source, CLI/configuration and SDK contracts. Review does not certify every platform or integration.

Versions & compatibility