diff --git a/graph/fixes/fix-claude-code-posttooluse-hook-correct-json-format-be0bda.md b/graph/fixes/fix-claude-code-posttooluse-hook-correct-json-format-be0bda.md
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+---
+id: be0bda86-d893-4f86-97c4-0ca4e1073121
+type: fix
+title: "Fix: Claude Code PostToolUse hook correct JSON format"
+tags: [sba-scouting, rust, claude-code, hooks, configuration, fix]
+importance: 0.8
+confidence: 0.8
+created: "2026-03-02T02:08:35.272129+00:00"
+updated: "2026-03-02T02:08:35.272129+00:00"
+---
+
+# Claude Code PostToolUse Hook Correct Format
+
+## Problem
+Claude Code hooks were not firing because the configuration used incorrect field names and structure.
+
+## Root Cause
+- Used `PostToolCall` instead of `PostToolUse`
+- Used `matcher` as an object with `tool_name`/`file_glob` fields instead of a plain regex string
+- File glob filtering is NOT supported in the matcher field — must be done in the shell command itself
+
+## Solution
+The correct format for `.claude/settings.json`:
+
+```json
+{
+  "hooks": {
+    "PostToolUse": [
+      {
+        "matcher": "Edit|Write",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "if echo \"$TOOL_INPUT\" | grep -q '\\.rs'; then cargo check --message-format=short 2>&1 | grep '^src/' | head -20; fi"
+          }
+        ]
+      }
+    ]
+  }
+}
+```
+
+## Key Rules
+- Event key: `PostToolUse` (not `PostToolCall`)
+- `matcher`: plain regex string matching tool names
+- `hooks`: array of objects with `type: "command"` and `command` string
+- File filtering: must be done inside the shell command using `$TOOL_INPUT` env var