fix(plugin): fix hook JSON escaping and unconditional session firing (#241)

* fix(shellcheck): declare and assign separately in router.sh (SC2155)

* feat(plugin): enhance context management and skill invocation

- Update .context-manifest.json to include profile and detailed source information.
- Revise context-scout.md to clarify context root discovery and navigation.
- Modify commands to replace deprecated skills with updated ones (brainstorming → approach, systematic-debugging → debugger).
- Streamline install-context.md for clarity and remove interactive profile selection.
- Improve oac-status.md to provide a more comprehensive status report.
- Add OAC system paths to session-start.sh for better context management.
- Remove obsolete skills and improve documentation for existing commands.

* fix(plugin): fix hook JSON escaping and unconditional session firing

- Fix double-escaped skill catalogue: use $'\n' real newlines instead of
  literal \n strings so escape_for_json encodes them correctly as \n in JSON
- Fix OAC_SYSTEM_PATHS embedded raw into JSON string: build with real newlines
  and pass through escape_for_json before interpolation
- Remove SessionStart matcher so hook fires on every session start
  unconditionally (startup, resume, clear, compact and any future types)
- Remove redundant async:false field; add explicit timeout:30

plugins/claude-code/hooks/hooks.json

@@ -2,13 +2,11 @@
   "hooks": {
     "SessionStart": [
       {
-        "matcher": "startup|resume|clear|compact",
         "hooks": [
           {
             "type": "command",
             "command": "${CLAUDE_PLUGIN_ROOT}/hooks/session-start.sh",
-            "timeout": 30,
-            "async": false
+            "timeout": 30
           }
         ]
       }

plugins/claude-code/hooks/session-start.sh

@@ -30,6 +30,7 @@ escape_for_json() {
 using_oac_escaped=$(escape_for_json "$using_oac_content")
 
 # Build skill catalogue from skills directory
+# Use real newlines (not literal \n) so escape_for_json encodes them correctly as \n in JSON
 skill_catalogue=""
 if [ -d "${PLUGIN_ROOT}/skills" ]; then
     for skill_dir in "${PLUGIN_ROOT}/skills"/*/; do
@@ -39,9 +40,9 @@ if [ -d "${PLUGIN_ROOT}/skills" ]; then
             # Extract description from frontmatter
             description=$(grep -m1 '^description:' "$skill_file" 2>/dev/null | sed 's/^description: *//;s/^"//;s/"$//' || echo "")
             if [ -n "$description" ]; then
-                skill_catalogue="${skill_catalogue}\n- oac:${skill_name} — ${description}"
+                skill_catalogue="${skill_catalogue}"$'\n'"- oac:${skill_name} — ${description}"
             else
-                skill_catalogue="${skill_catalogue}\n- oac:${skill_name}"
+                skill_catalogue="${skill_catalogue}"$'\n'"- oac:${skill_name}"
             fi
         fi
     done