docs: update build and formatting instructions in AGENT.md

AGENT.md

@@ -56,10 +56,21 @@
 
 ### Fix build problems
 
-Use this plan with sequential thinking:
-- Check the project using `TERM=dumb cargo check`
-- Identify the cause of any errors and warnings
-- If there are no errors or warnings, stop
-- If there are errors are warnings, create a plan to fix errors and warnings
-- Fix the files one at a time, not in parallel
-- Use the `write_file` tool to output the complete version of the corrected file
+1. Build the project: `TERM=dumb cargo build`.
+2. If there are errors or warnings, create a new sub agent (expert rust developer) that uses the `TERM=dumb cargo build` output as input, planned using strategic thinking.
+   a. Read all affected files
+   d. Plan the fixes using strategic thinking:
+      - Read other files if they provide context or examples
+      - Look up relevant API information
+      - Do not downgrade versions
+      - Preserve functionality
+      - Use `TERM=dumb cargo fix` if appropriate.
+      - Prefer the `write_file` tool if there is evidence of double escaping
+      - You must generate the full file contents when using `write_file` or it will be truncated.
+   c. Return the list of files modified
+3. If any files were modified, loop back to 1.
+
+### Fix formatting
+
+1. Format the project the project: `TERM=dumb cargo fmt`
+2. Continue with the fix build problems procedure.

Cargo.lock

@@ -649,6 +649,15 @@ dependencies = [
  "dirs-sys",
 ]
 
+[[package]]
+name = "dirs"
+version = "6.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3e8aa94d75141228480295a7d0e7feb620b1a5ad9f12bc40be62411e38cce4e"
+dependencies = [
+ "dirs-sys",
+]
+
 [[package]]
 name = "dirs-sys"
 version = "0.5.0"
@@ -1377,6 +1386,7 @@ dependencies = [
  "ctor",
  "derive_more",
  "directories",
+ "dirs",
  "dns-lookup",
  "enum-map",
  "flate2",