feat(opencode): complete OpenCode agent setup - add 10 missing agent prompts (#726)

* feat(opencode): complete OpenCode agent setup - add 11 missing agent prompts

Summary:
- Add 11 missing OpenCode agent prompt files for: chief-of-staff, cpp-reviewer, cpp-build-resolver, docs-lookup, harness-optimizer, java-reviewer, java-build-resolver, kotlin-reviewer, kotlin-build-resolver, loop-operator, python-reviewer
- Update opencode.json to register all 25 agents (previously only 14 were configured)

Type:
- [x] Agent

Testing:
- Verified JSON syntax is valid
- All 25 agents now have corresponding prompt files in .opencode/prompts/agents/
- opencode.json updated with all agent configurations

* fix: address PR review comments - add SOUL.md, update AGENTS.md, fix tool configs, and refine agent prompts

* fix: remove chief-of-staff agent and SOUL.md per affaan-m review

- Remove chief-of-staff agent from opencode.json (outside ECC scope)
- Remove chief-of-staff.txt prompt file
- Remove SOUL.md file
- Remove chief-of-staff from AGENTS.md table and orchestration section
- Update agent count from 28 to 27

---------

Co-authored-by: Nayan Jaiswal <jaiswal2062@gmail.com>

.opencode/opencode.json

@@ -177,6 +177,148 @@
         "edit": true,
         "bash": true
       }
+    },
+    "cpp-reviewer": {
+      "description": "Expert C++ code reviewer specializing in memory safety, modern C++ idioms, concurrency, and performance. Use for all C++ code changes.",
+      "mode": "subagent",
+      "model": "anthropic/claude-opus-4-5",
+      "prompt": "{file:prompts/agents/cpp-reviewer.txt}",
+      "tools": {
+        "read": true,
+        "bash": true,
+        "write": false,
+        "edit": false
+      }
+    },
+    "cpp-build-resolver": {
+      "description": "C++ build, CMake, and compilation error resolution specialist. Fixes build errors, linker issues, and template errors with minimal changes.",
+      "mode": "subagent",
+      "model": "anthropic/claude-opus-4-5",
+      "prompt": "{file:prompts/agents/cpp-build-resolver.txt}",
+      "tools": {
+        "read": true,
+        "write": true,
+        "edit": true,
+        "bash": true
+      }
+    },
+    "docs-lookup": {
+      "description": "Documentation specialist using Context7 MCP to fetch current library and API documentation with code examples.",
+      "mode": "subagent",
+      "model": "anthropic/claude-sonnet-4-5",
+      "prompt": "{file:prompts/agents/docs-lookup.txt}",
+      "tools": {
+        "read": true,
+        "bash": true,
+        "write": false,
+        "edit": false
+      }
+    },
+    "harness-optimizer": {
+      "description": "Analyze and improve the local agent harness configuration for reliability, cost, and throughput.",
+      "mode": "subagent",
+      "model": "anthropic/claude-sonnet-4-5",
+      "prompt": "{file:prompts/agents/harness-optimizer.txt}",
+      "tools": {
+        "read": true,
+        "bash": true,
+        "edit": true
+      }
+    },
+    "java-reviewer": {
+      "description": "Expert Java and Spring Boot code reviewer specializing in layered architecture, JPA patterns, security, and concurrency.",
+      "mode": "subagent",
+      "model": "anthropic/claude-opus-4-5",
+      "prompt": "{file:prompts/agents/java-reviewer.txt}",
+      "tools": {
+        "read": true,
+        "bash": true,
+        "write": false,
+        "edit": false
+      }
+    },
+    "java-build-resolver": {
+      "description": "Java/Maven/Gradle build, compilation, and dependency error resolution specialist. Fixes build errors with minimal changes.",
+      "mode": "subagent",
+      "model": "anthropic/claude-opus-4-5",
+      "prompt": "{file:prompts/agents/java-build-resolver.txt}",
+      "tools": {
+        "read": true,
+        "write": true,
+        "edit": true,
+        "bash": true
+      }
+    },
+    "kotlin-reviewer": {
+      "description": "Kotlin and Android/KMP code reviewer. Reviews Kotlin code for idiomatic patterns, coroutine safety, Compose best practices.",
+      "mode": "subagent",
+      "model": "anthropic/claude-opus-4-5",
+      "prompt": "{file:prompts/agents/kotlin-reviewer.txt}",
+      "tools": {
+        "read": true,
+        "bash": true,
+        "write": false,
+        "edit": false
+      }
+    },
+    "kotlin-build-resolver": {
+      "description": "Kotlin/Gradle build, compilation, and dependency error resolution specialist. Fixes Kotlin build errors with minimal changes.",
+      "mode": "subagent",
+      "model": "anthropic/claude-opus-4-5",
+      "prompt": "{file:prompts/agents/kotlin-build-resolver.txt}",
+      "tools": {
+        "read": true,
+        "write": true,
+        "edit": true,
+        "bash": true
+      }
+    },
+    "loop-operator": {
+      "description": "Operate autonomous agent loops, monitor progress, and intervene safely when loops stall.",
+      "mode": "subagent",
+      "model": "anthropic/claude-sonnet-4-5",
+      "prompt": "{file:prompts/agents/loop-operator.txt}",
+      "tools": {
+        "read": true,
+        "bash": true,
+        "edit": true
+      }
+    },
+    "python-reviewer": {
+      "description": "Expert Python code reviewer specializing in PEP 8 compliance, Pythonic idioms, type hints, security, and performance.",
+      "mode": "subagent",
+      "model": "anthropic/claude-opus-4-5",
+      "prompt": "{file:prompts/agents/python-reviewer.txt}",
+      "tools": {
+        "read": true,
+        "bash": true,
+        "write": false,
+        "edit": false
+      }
+    },
+    "rust-reviewer": {
+      "description": "Expert Rust code reviewer specializing in idiomatic Rust, ownership, lifetimes, concurrency, and performance.",
+      "mode": "subagent",
+      "model": "anthropic/claude-opus-4-5",
+      "prompt": "{file:prompts/agents/rust-reviewer.txt}",
+      "tools": {
+        "read": true,
+        "bash": true,
+        "write": false,
+        "edit": false
+      }
+    },
+    "rust-build-resolver": {
+      "description": "Rust build, Cargo, and compilation error resolution specialist. Fixes Rust build errors with minimal changes.",
+      "mode": "subagent",
+      "model": "anthropic/claude-opus-4-5",
+      "prompt": "{file:prompts/agents/rust-build-resolver.txt}",
+      "tools": {
+        "read": true,
+        "write": true,
+        "edit": true,
+        "bash": true
+      }
     }
   },
   "command": {