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Mohamed Boudra 978a544f19 plan: design agent parent/child hierarchy

Design complete for agent parent/child hierarchy feature:
- parentAgentId field to track agent relationships
- MCP create_agent tool auto-sets parent from calling agent
- Homepage filters to show only root agents
- Agent menu shows sub-agents with navigation

Added implementation tasks:
- Server types (agent-manager, agent-sdk-types, agent-projections)
- MCP server integration
- Client types (session-store, agent-directory, messages)
- Homepage filtering
- Agent menu sub-agents section
- End-to-end test task
- Re-audit plan task

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2025-12-21 17:12:45 +00:00

21 KiB

Raw Blame History

Plan

Context

Voice-controlled terminal assistant using OpenAI's Realtime API. Monorepo with Express backend and Expo cross-platform app.

Focus: Agent model info tracking. Two distinct concepts:

Configured model: What the user requested (default or specific model)
Runtime model: What the agent is actually using (from the agent process itself)

Hard requirement: We must get the actual runtime model, not just echo back the requested config.

Environment

Expo app: Running in tmux session moboudra:mobile - check logs with tmux capture-pane -t moboudra:mobile -p
Server: Running in tmux session moboudra:server - check logs with tmux capture-pane -t moboudra:server -p
Web testing: Use Playwright MCP at http://localhost:8081

Guiding Principles

Keep changes minimal and focused
Run typecheck after every change
Don't break existing functionality
Test in the running app when possible

Autonomous Loop Requirements (CRITICAL)

Always add follow-up tasks. Every task type must add new tasks to keep the loop running:
- Plan tasks → add implementation tasks, test tasks, and another Plan task to re-audit later
- Implement tasks → just implement, test task should already be in the plan
- Test tasks → if issues found, add fix tasks + re-test task; if passing, document and continue
- Fix tasks → add re-test task to verify the fix
- Review tasks → add fix tasks for issues + another review task after fixes
Insert tasks at the right position. New tasks go immediately after the current task, not at the end.
Never leave the plan empty. If you're the last task, add a checkpoint or review task.

Code Review Requirements

Large implementations need Codex review. After completing a significant feature or multi-file change, add a agent=codex **Review** task.
Codex reviews focus on code quality and types. Check for type errors, unsafe casts, missing error handling, and code smells.
Reviews spawn fix tasks. If issues found, add fix tasks immediately after, then add another agent=codex **Review** task to verify fixes.
Loop until clean. Review → fix → re-review → ... until no issues remain.

Testing Requirements (CRITICAL)

Nothing is done until tested. Every implementation task must be followed by a testing task using Playwright MCP.
Test tasks verify specific behaviors. Not "test the feature" but "verify X does Y when Z".
Test failures spawn fix tasks. If a test finds issues, add fix tasks immediately after.
Fix tasks get their own test tasks. After a fix task, add a re-test task to verify the fix.
Loop until it works. The cycle is: implement → test → fix → re-test → ... until verified working.
Testers own the plan. Test tasks can and should add new tasks (fixes, re-tests) to keep the loop going.
Never claim done without verification. If you can't test it with Playwright MCP, you can't mark it complete.

Tasks

Plan: Audit current model info implementation and expand this plan.
- Find where model config is set when creating agents.
- Find where runtime model info is fetched/displayed.
- Document how each provider (Claude SDK, Codex SDK) exposes actual model info.
- Check if we're currently showing requested model vs actual runtime model.
- Add implementation tasks based on findings.
- Add test tasks as needed.
- Add another Plan task at an appropriate position to re-audit after some progress.
- Done (2025-12-21 12:45): Completed full audit. See findings below.

Audit Findings: Model Info Implementation

Current Architecture (Working Well):

Model config is set via AgentSessionConfig.model in agent-sdk-types.ts:148-164
Runtime info uses AgentRuntimeInfo type with model field in agent-sdk-types.ts:126-132
UI correctly uses extractAgentModel() which reads runtimeInfo.model (not config)
Displayed in agent screen header at line 555 of [agentId].tsx

Claude SDK:

claude-agent.ts:423-435 - getRuntimeInfo() returns this.lastOptionsModel
Model comes from Claude SDK options passed during agent creation
Currently echoes back the configured model (not truly "runtime detected")

Codex SDK:

codex-agent.ts:407-426 - getRuntimeInfo() reads actual runtime model
codex-agent.ts:1229-1261 - Parses rollout file for turn_context.payload.model
This IS the actual runtime model (correctly implemented)
Falls back to config model if rollout not available yet

Gap Identified:

Claude agents: Model info is the configured model, not detected from Claude SDK
Codex agents: Model info IS detected from runtime (via rollout file) ✓
Claude SDK may expose actual model in response metadata - needs investigation

Data Flow:

Config: config.model → agent creation
Runtime: agent.session.getRuntimeInfo() called after stream/turn completion
Storage: runtimeInfo persisted in agent registry
Client: Receives via WebSocket, displayed via extractAgentModel()

Investigate: Check if Claude SDK exposes actual model in response/stream metadata.
- Look at @anthropic-ai/claude-agent-sdk types for model info in responses
- Check if query() returns model information
- Document findings for implementation task
- Done (2025-12-21 13:15): YES, the Claude SDK exposes actual model info in TWO places:
  1. SDKSystemMessage (subtype: "init") has model: string field (sdk.d.ts:334)
  2. SDKResultMessage has modelUsage: { [modelName: string]: ModelUsage } (sdk.d.ts:299-300)
  - Current implementation ignores both - only uses config.model (claude-agent.ts:712)
  - Fix: Update handleSystemMessage() to capture message.model as lastOptionsModel
  - Alternatively: Extract model name from modelUsage keys in SDKResultMessage
Implement: Capture actual model from Claude SDK init message.
- In handleSystemMessage(), set this.lastOptionsModel = message.model
- This gives us the actual model the SDK selected (not just our config)
- Simpler than parsing modelUsage, same result
- Done (2025-12-21 13:25): Updated handleSystemMessage() in claude-agent.ts:868-882 to capture message.model from the SDK init message and invalidate cached runtime info. Typecheck passes.
Test: Verify current Codex runtime model detection works.
- Create a Codex agent with default model
- Wait for first turn to complete
- Verify the model displayed matches actual runtime model (e.g., gpt-4.1)
- Check that it's not just echoing configured model
- If issues found: add fix tasks immediately after this task, then add re-test task after fixes.
- Done (2025-12-21 13:35): PASSED. Created Codex agent with "Automatic" model config. After first turn, UI correctly displays gpt-5.1-codex-max (actual runtime model from rollout file), not "Automatic". Runtime model detection working correctly.
Test: Verify Claude agent model display behavior.
- Create a Claude agent with default model
- Wait for first turn to complete
- Check what model is displayed
- Document whether it's configured or runtime model
- If issues found: add fix tasks immediately after this task, then add re-test task after fixes.
- Done (2025-12-21 13:50): FAILED. Created Claude agent with "Automatic" model config. Agent self-reported running on claude-opus-4-1-20250805 (Opus 4.1), but UI shows Model: Unknown in agent info menu. The implementation to capture model from SDK init message is not working - model is not being propagated to the UI.
Fix: Debug and fix Claude agent model capture from SDK init message.
- Check server logs to see if handleSystemMessage() is receiving the init message with model
- Verify this.lastOptionsModel is being set correctly
- Check if getRuntimeInfo() is being called after stream completion
- Ensure runtime info is being persisted and sent to client via WebSocket
- The model should show claude-opus-4-1-20250805 instead of "Unknown"
- Done (2025-12-21 14:10): Found and fixed the bug. The issue was in agent-manager.ts:refreshRuntimeInfo() - it updated agent.runtimeInfo but never called emitState(agent) to notify clients. Fixed by adding change detection and emitting state when runtimeInfo changes. Also added debug logging to handleSystemMessage() to confirm model capture from SDK init message. Typecheck passes.
Test: Re-verify Claude agent model display after fix.
- Create a new Claude agent with default model
- Wait for first turn to complete
- Verify model displays correctly (not "Unknown")
- Should show actual runtime model like claude-opus-4-1-20250805
- Done (2025-12-21 14:30): FAILED. Model still shows "Unknown". Root cause: The server wasn't restarted after the fix was implemented. The dev server uses tsx with explicit restart messaging - it doesn't auto-reload on file changes. Verified by checking that the debug log [ClaudeAgentSession] Captured model from SDK init doesn't appear in server logs (and isn't in the compiled dist either). The fix code is correct in source but the server is running stale code.
Fix: Restart server to apply model capture fix.
- The server needs to be restarted to pick up the changes to claude-agent.ts and agent-manager.ts
- After restart, the SDK init message model capture and emitState fix should work
- Verify the debug log appears in server logs when creating a new Claude agent
- Done (2025-12-21 14:45): Server successfully restarted in tmux session moboudra:server. Sent Ctrl-C to stop the running server, then ran npm run dev to restart. Server is now running with the updated code that includes the model capture from SDK init message and the emitState fix for runtimeInfo changes. Ready for testing.
Test: Re-test Claude model display after server restart.
- Create a new Claude agent with default model
- Check server logs for [ClaudeAgentSession] Captured model from SDK init
- Verify model displays correctly in agent info menu (not "Unknown")
- Should show actual runtime model like claude-opus-4-1-20250805
- Done (2025-12-21 14:55): PASSED. Created Claude agent with "Automatic" model config. Agent responded with "Hello! I'm Claude Code running on the Opus 4.1 model (claude-opus-4-1-20250805)." The agent info menu now correctly displays Model: claude-opus-4-1-20250805 instead of "Unknown". The fix is working - runtime model is now captured from SDK init message and propagated to the UI.
Plan: Re-audit after investigation and initial tests complete.
- Review test results
- Determine if Claude SDK exposes runtime model info
- Add implementation tasks if improvements needed
- Add fix tasks if tests reveal issues
- Done (2025-12-21 15:00): Re-audit complete. All model info tests PASSED. Claude SDK investigation found model exposed in init message; implementation captured it in handleSystemMessage(). Fixed refreshRuntimeInfo() to emit state on changes. Both Claude (shows claude-opus-4-1-20250805) and Codex (shows gpt-5.1-codex-max) now correctly display actual runtime models. Feature complete - no additional tasks needed for model info tracking.
Implement: Update Claude SDK package to use Opus 4.5.
- Update @anthropic-ai/claude-agent-sdk to latest version.
- Verify the SDK defaults to Opus 4.5 (claude-opus-4-5-20251101).
- Run typecheck after update.
- Restart server and verify new model is used.
- Done (2025-12-21 17:45): Updated @anthropic-ai/claude-agent-sdk from 0.1.74 to 0.1.75. SDK now includes Opus 4.5 model (claude-opus-4-5-20251101). Typecheck passes. Server restarted in tmux session. Test task will verify the model is being used.
Test: Verify Claude agent uses Opus 4.5 after SDK update.
- Create a new Claude agent with default model.
- Check model displays as claude-opus-4-5-20251101 or similar.
- Confirm upgrade worked.
- Done (2025-12-21 17:50): PASSED. Created Claude agent with "Automatic" model config. Agent self-reported running on claude-opus-4-5-20251101 (Opus 4.5). Agent info menu correctly displays Model: claude-opus-4-5-20251101. SDK update to 0.1.75 successfully upgraded Claude agents to Opus 4.5.
Plan: Fix agent git diff not loading.
- Investigate why git diff is not loading in agent view.
- Find where git diff is fetched and rendered.
- Identify the root cause of the loading failure.
- Add implementation/fix tasks based on findings.
- Add test task to verify git diff loads correctly via Playwright MCP.
- Add another Plan task to re-audit after fix if needed.
- Done (2025-12-21 16:30): Root cause identified. See findings below.

Git Diff Loading Bug Findings

Symptom: Git diff screen shows "Loading changes..." forever, even though data is being received successfully.

Root Cause: Infinite loop caused by unstable requestGitDiff function reference.

Data Flow Analysis:

git-diff.tsx:109-111 - Gets requestGitDiff from session store methods
git-diff.tsx:113-127 - useEffect depends on requestGitDiff and calls it
session-context.tsx:1492-1501 - requestGitDiff depends on gitDiffRequest
session-context.tsx:1698-1736 - methods object is memoized with requestGitDiff as dependency
session-context.tsx:1738-1740 - setSessionMethods is called when methods changes

The Loop:

Component mounts, effect calls requestGitDiff(agentId)
Response comes back, setGitDiffs is called, which updates store
Store update causes useDaemonRequest internal state to change
gitDiffRequest reference changes → requestGitDiff reference changes
methods object changes → setSessionMethods is called
requestGitDiff selector returns new reference → effect runs again → goto step 1

Console Evidence:

setGitDiffs called 250+ times in seconds
setSessionMethods called 250+ times in seconds
git_diff_request sent repeatedly
git_diff_response received successfully each time (1575 bytes)
UI stuck on "Loading changes..." despite data being stored

Fix Required: Remove requestGitDiff from useEffect dependencies in git-diff.tsx. Use a ref to track if we've already requested, or use a more stable approach.

Fix: Remove requestGitDiff from useEffect dependencies in git-diff.tsx.
- The requestGitDiff function reference changes on every store update
- Remove it from the dependency array to prevent infinite loop
- Use a ref to track if we've already requested the diff
- Keep agentId as the only dependency (or use empty deps with agentId check)
- Run typecheck after fix.
- Done (2025-12-21 18:10): Added hasRequestedRef to track if a request was already made for the current agentId. The ref prevents duplicate requests when requestGitDiff reference changes due to store updates. Typecheck passes.
Test: Verify git diff loads correctly after fix.
- Navigate to an agent screen
- Click "View Changes" in the agent info menu
- Verify the diff content displays (or "No changes" if clean)
- Confirm no infinite loop in console (no repeated requests)
- Verify the loading spinner goes away
- Done (2025-12-21 18:20): PASSED. Tested via Playwright MCP - navigated to agent screen, clicked "View Changes", and git diff loaded successfully showing changes to plan.md. Only one git_diff_request was sent (no infinite loop). The setGitDiffs was called once and content rendered correctly. Fix verified working.
Plan: Design and implement agent parent/child hierarchy.
- Add parentId field to agents.
- Agents created via MCP should auto-set parentId to the calling agent.
- Homepage should only show top-level agents (no parentId).
- Agent screen three-dot menu should show sub-agents of that agent.
- Sub-agents should be navigable from the menu.
- Ensure back button works properly when navigating agent hierarchy.
- Add implementation tasks based on findings.
- Add another Plan task at an appropriate position to re-audit after some progress.
- Done (2025-12-21 19:30): Design complete. See findings below.

Agent Parent/Child Hierarchy Design

Overview: Enable agents to spawn child agents, with UI support for viewing and navigating the hierarchy.

Architecture Summary:

Files requiring modification:

Server Types (agent-manager.ts:77): Add parentAgentId?: string to ManagedAgentBase
SDK Types (agent-sdk-types.ts:148): Add to AgentSessionConfig interface
App Types (session-store.ts:85, agent-directory.ts:4): Add to Agent and AgentDirectoryEntry
MCP Server (mcp-server.ts:183): Add parentAgentId to create_agent tool input schema
Session Handler (session.ts:1248): Pass parentAgentId in handleCreateAgentRequest()
Message Schema (messages.ts:351): Add to CreateAgentRequestMessageSchema
Agent Projections (agent-projections.ts): Include parentAgentId in serialized payload
Homepage (agent-list.tsx): Filter to show only root agents (no parentAgentId)
Agent Menu ([agentId].tsx:536): Add "Sub-Agents" section showing child agents
Create Agent ([agentId].tsx:415): Pass current agent ID as parentAgentId when spawning