docs: update AGENTS documentation metadata and agent model references

- Update generated timestamp and commit hash metadata
- Normalize agent model names with provider prefixes (anthropic/, opencode/, google/)
- Remove deprecated Google OAuth/Antigravity references
- Update line counts and complexity hotspot entries
- Adjust test count from 82 to 80+ files and assertions from 2559+ to 2500+

🤖 Generated with assistance of oh-my-opencode

src/shared/AGENTS.md

@@ -7,6 +7,7 @@ Cross-cutting utilities for path resolution, config management, text processing,
 ```
 shared/
 ├── index.ts              # Barrel export
+├── agent-variant.ts      # Agent model/prompt variation logic
 ├── claude-config-dir.ts  # ~/.claude resolution
 ├── command-executor.ts   # Shell exec with variable expansion
 ├── config-errors.ts      # Global error tracking
@@ -14,23 +15,31 @@ shared/
 ├── data-path.ts          # XDG data directory
 ├── deep-merge.ts         # Type-safe recursive merge
 ├── dynamic-truncator.ts  # Token-aware truncation
+├── external-plugin-detector.ts # Detect marketplace plugins
 ├── file-reference-resolver.ts  # @filename syntax
 ├── file-utils.ts         # Symlink, markdown detection
+├── first-message-variant.ts    # Initial prompt variations
 ├── frontmatter.ts        # YAML frontmatter parsing
 ├── hook-disabled.ts      # Check if hook disabled
 ├── jsonc-parser.ts       # JSON with Comments
 ├── logger.ts             # File-based logging
 ├── migration.ts          # Legacy name compat (omo → Sisyphus)
 ├── model-sanitizer.ts    # Normalize model names
+├── opencode-config-dir.ts # ~/.config/opencode resolution
+├── opencode-version.ts   # Version comparison logic
 ├── pattern-matcher.ts    # Tool name matching
+├── permission-compat.ts  # Legacy permission mapping
+├── session-cursor.ts     # Track message history pointer
 ├── snake-case.ts         # Case conversion
-└── tool-name.ts          # PascalCase normalization
+├── tool-name.ts          # PascalCase normalization
+└── zip-extractor.ts      # Plugin installation utility
 ```
 
 ## WHEN TO USE
 | Task | Utility |
 |------|---------|
 | Find ~/.claude | `getClaudeConfigDir()` |
+| Find ~/.config/opencode | `getOpenCodeConfigDir()` |
 | Merge configs | `deepMerge(base, override)` |
 | Parse user files | `parseJsonc()` |
 | Check hook enabled | `isHookDisabled(name, list)` |
@@ -38,6 +47,9 @@ shared/
 | Resolve @file | `resolveFileReferencesInText()` |
 | Execute shell | `resolveCommandsInText()` |
 | Legacy names | `migrateLegacyAgentNames()` |
+| Version check | `isOpenCodeVersionAtLeast(version)` |
+| Map permissions | `normalizePermission()` |
+| Track session | `SessionCursor` |
 
 ## CRITICAL PATTERNS
 ```typescript
@@ -49,10 +61,14 @@ const final = deepMerge(deepMerge(defaults, userConfig), projectConfig)
 
 // Safe JSONC parsing for user-edited files
 const { config, error } = parseJsoncSafe(content)
+
+// Version-gated features
+if (isOpenCodeVersionAtLeast('1.0.150')) { /* ... */ }
 ```
 
 ## ANTI-PATTERNS
-- Hardcoding paths (use `getClaudeConfigDir`, `getUserConfigPath`)
+- Hardcoding paths (use `getClaudeConfigDir`, `getOpenCodeConfigDir`)
 - Using `JSON.parse` for user configs (always use `parseJsonc`)
 - Ignoring output size (large tool outputs MUST use `dynamicTruncate`)
-- Manual case conversion (use `toSnakeCase`, `normalizeToolName`)
+- Manual version parsing (use `opencode-version.ts` utilities)
+- Raw permission checks (use `permission-compat.ts`)