Docs: Comprehensive analysis & fix guides for ALL 10 issues (AI-analyzed)

.ralph/@fix_plan.md

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+# Ralph Fix Plan (GitHub Issues)
+Repository: anomalyco/opencode
+Updated: 2026-01-24 18:05 UTC
+
+## High Priority
+
+- [x] Issue #10350: Under ulw operation, the agent cannot be invoked.
+  - Labels: none
+  - Status: **ANALYZED** - Root cause identified: Custom agents with mode="primary" are filtered out from Task tool invocation
+  - Documentation: .ralph/docs/issue_10350_analysis.md
+  - Solution: Add clear error message when attempting to invoke primary agents as subagents
+
+- [x] Issue #10349: Sessions not visible across platforms when syncing data directory (cross-platform session visibility)
+  - Labels: windows
+  - Status: **ANALYZED** - Root cause identified: storage.ts line 220 uses platform-specific path.sep for splitting
+  - Documentation: .ralph/docs/issue_10349_analysis.md
+  - Solution: Use cross-platform path separator handling (split by both / and \)
+
+- [x] Issue #10348: Grok Code Fast 1 disappeared from OpenCode Zen
+  - Labels: bug,zen
+  - Status: **ANALYZED** - Model deprecation, not a bug
+  - Documentation: .ralph/docs/issue_10348_analysis.md
+
+- [x] Issue #10346: opentui: fatal: undefined is not an object (evaluating 'local.agent.current().name')
+  - Labels: bug,opentui
+  - Status: **ANALYZED** - Null safety issue, fix available
+  - Documentation: .ralph/docs/issue_10346_analysis.md
+
+- [x] Issue #10343: Misleading Tip about location of custom-tools
+  - Labels: bug,docs
+  - Status: **ANALYZED** - Hardcoded path issue
+  - Documentation: .ralph/docs/issue_10343_analysis.md
+
+- [x] Issue #10342: /compact doesn't utilize prompt caching
+  - Labels: bug
+  - Status: **ANALYZED** - Missing cache headers
+  - Documentation: .ralph/docs/issue_10342_analysis.md
+
+- [x] Issue #10341: Scoop-fixes-opencode-windows-x64-garbled-output-issue-but-cause-unknown
+  - Labels: opentui,windows
+  - Status: **ANALYZED** - Terminal encoding mismatch
+  - Documentation: .ralph/docs/issue_10341_analysis.md
+
+- [x] Issue #10339: [FEATURE]: Add visual indicator for subagent status (running, error, finished)
+  - Labels: opentui,discussion
+  - Status: **ANALYZED** - UI enhancement needed
+  - Documentation: .ralph/docs/issue_10339_analysis.md
+
+## Remaining Issues (2)
+
+- [x] Issue #10345: [FEATURE]: Terminal long output lacks scrollbar for quick navigation
+  - Labels: opentui,discussion
+  - Status: **ANALYZED** - Feature request for scrollbar component in OpenTUI
+  - Documentation: .ralph/docs/issue_10345_analysis.md
+  - Solution: Implement custom scrollbar component in OpenTUI
+
+- [x] Issue #10344: opentui: fatal: undefined is not an object (evaluating 'local.agent.current().name')
+  - Labels: bug,opentui
+  - Status: **DUPLICATE** - Same issue as #10346, already analyzed
+  - Documentation: See .ralph/docs/issue_10346_analysis.md
+  - Note: Exact duplicate - same error, same file location, same stack trace
+
+Total: 10 issues | Analyzed: 10 | Remaining: 0
+
+**✅ ALL ISSUES ANALYZED**

.ralph/IMPLEMENTATION_SUMMARY.md

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+# Ralph Implementation Summary
+
+## Status: Ready for Implementation
+
+All critical bugs have been analyzed and implementation guides created. Write permissions are required to apply the fixes.
+
+## Critical Issues - Implementation Ready
+
+### 1. Issue #10346: TUI Crash Bug (CRITICAL)
+**File**: `packages/opencode/src/cli/cmd/tui/context/local.tsx`
+**Lines**: 41, 57
+**Changes**: 2 modifications
+**Impact**: Prevents complete application failure
+**Instructions**: See `.ralph/MANUAL_FIX_INSTRUCTIONS.md`
+
+### 2. Issue #10349: Cross-platform Data Loss (HIGH)
+**File**: `packages/opencode/src/storage/storage.ts`
+**Line**: 220
+**Changes**: 1 line replacement
+**Impact**: Prevents session loss across Windows/Unix
+**Instructions**: See `.ralph/docs/IMPLEMENTATION_GUIDE.md`
+
+## All Bugs with Implementation Guides
+
+| Issue | Severity | Files | Lines | Effort |
+|-------|----------|-------|-------|--------|
+| #10346 | CRITICAL | local.tsx | 2 | 15 min |
+| #10349 | HIGH | storage.ts | 1 | 10 min |
+| #10350 | MEDIUM | task.ts | 2 | 20 min |
+| #10342 | MEDIUM | compaction.ts | 1 | 5 min |
+| #10341 | MEDIUM | terminal.ts, app.tsx | 2 | 10 min |
+| #10343 | LOW | tips.tsx | 1 | 5 min |
+
+**Total**: 6 files, ~10 lines of code, ~1 hour total effort
+
+## Quick Start for Implementation
+
+When write permissions are available:
+
+```bash
+# 1. Fix the critical TUI crash first
+# Edit packages/opencode/src/cli/cmd/tui/context/local.tsx
+# Follow instructions in .ralph/MANUAL_FIX_INSTRUCTIONS.md
+
+# 2. Fix the cross-platform data loss
+# Edit packages/opencode/src/storage/storage.ts line 220
+# Change: .split(path.sep)
+# To: .split(/[\/\\]/)
+
+# 3. Test the fixes
+bun test
+
+# 4. Commit with conventional commit
+git commit -m "fix(tui): add null safety to prevent crash when no agents available
+
+- Add validation for firstAgent existence
+- Add fallback in current() method
+- Provide helpful error messages
+
+Fixes #10346, #10344"
+```
+
+## Documentation Index
+
+### Analysis Documents (9 files)
+- `.ralph/docs/issue_10350_analysis.md` - Agent mode filtering
+- `.ralph/docs/issue_10349_analysis.md` - Cross-platform paths
+- `.ralph/docs/issue_10348_analysis.md` - Model deprecation (not a bug)
+- `.ralph/docs/issue_10346_analysis.md` - TUI crash analysis
+- `.ralph/docs/issue_10343_analysis.md` - Misleading tip
+- `.ralph/docs/issue_10342_analysis.md` - Compaction caching
+- `.ralph/docs/issue_10341_analysis.md` - Windows encoding
+- `.ralph/docs/issue_10339_analysis.md` - Subagent indicator (feature)
+
+### Implementation Guides
+- `.ralph/docs/IMPLEMENTATION_GUIDE.md` - Comprehensive step-by-step guide
+- `.ralph/MANUAL_FIX_INSTRUCTIONS.md` - Manual patch for #10346
+- `.ralph/@fix_plan.md` - Priority order and status
+
+## Feature Requests
+
+### Issue #10339: Subagent Visual Indicator
+**Status**: Design complete, implementation deferred
+**Complexity**: Medium (2-3 hours)
+**Documentation**: `.ralph/docs/issue_10339_analysis.md`
+**Priority**: Lower than bug fixes
+
+### Issue #10345: Terminal Scrollbar
+**Status**: Deferred
+**Priority**: Lowest
+
+## Testing Strategy
+
+After applying fixes:
+
+```bash
+# 1. Build the project
+bun run build
+
+# 2. Run TUI tests
+bun test packages/opencode/test/cli/cmd/tui/
+
+# 3. Manual testing
+# - Start opencode: bun run dev
+# - Test with normal config (should work)
+# - Test with broken config (should show error, not crash)
+
+# 4. Test cross-platform (if possible)
+# - Create sessions on Unix
+# - Sync to Windows
+# - Verify sessions are visible
+```
+
+## Rollback Plan
+
+If any fix causes issues:
+
+```bash
+# Revert specific file
+git checkout packages/opencode/src/cli/cmd/tui/context/local.tsx
+
+# Or revert all changes
+git reset --hard HEAD
+```
+
+## Success Criteria
+
+✅ All critical bugs fixed
+✅ TUI no longer crashes when agent list is empty
+✅ Cross-platform session syncing works
+✅ All tests passing
+✅ No regressions introduced
+
+## Next Actions
+
+1. **Wait for write permissions** to apply fixes
+2. **Apply critical fixes first** (#10346, #10349)
+3. **Test thoroughly** before committing
+4. **Apply remaining fixes** in priority order
+5. **Update fix plan** to mark issues as [x] complete
+
+---
+
+**Analysis Phase**: ✅ COMPLETE (100%)
+**Implementation Phase**: ⏳ READY (awaiting permissions)
+**Documentation**: ✅ COMPREHENSIVE (9 analysis + 2 guides)

.ralph/MANUAL_FIX_INSTRUCTIONS.md

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+# Manual Fix Instructions for Issue #10346 (CRITICAL)
+
+## File: `packages/opencode/src/cli/cmd/tui/context/local.tsx`
+
+### Change 1: Fix unsafe array access at line 36-42
+
+**BEFORE:**
+```typescript
+    const agent = iife(() => {
+      const agents = createMemo(() => sync.data.agent.filter((x) => x.mode !== "subagent" && !x.hidden))
+      const [agentStore, setAgentStore] = createStore<{
+        current: string
+      }>({
+        current: agents()[0].name,
+      })
+```
+
+**AFTER:**
+```typescript
+    const agent = iife(() => {
+      const agents = createMemo(() => sync.data.agent.filter((x) => x.mode !== "subagent" && !x.hidden))
+      const firstAgent = agents()[0]
+
+      // Validate that at least one agent exists
+      if (!firstAgent) {
+        throw new Error(
+          "No agents available. Please ensure at least one agent is enabled in your configuration.\n" +
+          "Visit https://opencode.ai/docs/agents for more information."
+        )
+      }
+
+      const [agentStore, setAgentStore] = createStore<{
+        current: string
+      }>({
+        current: firstAgent.name,
+      })
+```
+
+### Change 2: Fix unsafe find at line 56-58
+
+**BEFORE:**
+```typescript
+        current() {
+          return agents().find((x) => x.name === agentStore.current)!
+        },
+```
+
+**AFTER:**
+```typescript
+        current() {
+          const current = agents().find((x) => x.name === agentStore.current)
+          // Fallback to first available agent if current not found
+          return current ?? agents()[0] ?? (() => {
+            throw new Error("No agents available in configuration")
+          })()
+        },
+```
+
+## Verification
+
+After applying these changes, verify the fix works:
+
+1. **Build the project:**
+   ```bash
+   bun run build
+   ```
+
+2. **Run TUI tests (if they exist):**
+   ```bash
+   bun test packages/opencode/test/cli/cmd/tui/context/local.test.tsx
+   ```
+
+3. **Test manually:**
+   - Start opencode normally (should work fine)
+   - Try with broken config (no agents) - should show helpful error instead of crash
+
+## Rollback
+
+If you need to rollback:
+```bash
+git checkout packages/opencode/src/cli/cmd/tui/context/local.tsx
+```