Link agent operator guide from README and operator contract

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Zac

README.md

@@ -492,6 +492,12 @@ Special reasons (`empty_value`, `null_value`, `missing_field`, `non_scalar_value
 
 ---
 
+## Agent Integration
+
+For the full toolchain guide, see the [Agent Operator Guide](https://github.com/cmdrvl/.github/blob/main/profile/AGENT_PROMPT.md). Run `canon --describe` for this tool's machine-readable contract.
+
+---
+
 ## Spec
 
 The full specification is `docs/PLAN_CANON.md`. This README covers everything needed to use the tool; the spec adds implementation details, edge-case definitions, and testing requirements.

src/lib.rs

@@ -30,6 +30,7 @@ pub fn run(cli: Cli) -> Result<u8, Box<dyn Error>> {
             "tool": "canon",
             "version": "0.1.0",
             "description": "Canonical identifier resolution tool",
+            "agent_guide": "https://github.com/cmdrvl/.github/blob/main/profile/AGENT_PROMPT.md",
             "schema_version": "canon.v0",
             "capabilities": {
                 "input_formats": ["csv", "jsonl"],