Reference

ctx_plan

Input contract and parameters for ctx_plan.

Status by featureReviewed September 2026

MCP tool · Planning tools

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.

Example call

JSON for an MCP client. Replace example paths and queries with your own project values.

{
  "name": "ctx_plan",
  "arguments": {
    "task": "Understand authentication",
    "budget": 4000,
    "profile": "balanced"
  }
}

Parameters

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

budgetinteger

Token budget limit (default: 12000)

profilestring

ultra_lean (minimal)|balanced (default)|forensic (exhaustive)

taskstringRequired

Task description (short English preferred)

Exact JSON schema

Inspect the complete input schema

{
  "properties": {
    "budget": {
      "description": "Token budget limit (default: 12000)",
      "type": "integer"
    },
    "profile": {
      "description": "ultra_lean (minimal)|balanced (default)|forensic (exhaustive)",
      "type": "string"
    },
    "task": {
      "description": "Task description (short English preferred)",
      "type": "string"
    }
  },
  "required": [
    "task"
  ],
  "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

WORKFLOW: set task+profile -> ctx_plan -> use results with ctx_read/ctx_compose.
ANTIPATTERN: NOT for compressing already-selected files (use ctx_fill).
Selects files for context via Phi scoring + budget + policy.
task=short English; budget=token limit (default 12000);
profile=ultra_lean|balanced|forensic. Saves tokens by prioritizing relevant files.

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