# Session Summary & Resume Point

## What We Just Completed

**Branch:** `feature/host-restart-handling`
**Status:** Pushed to remote, ready for testing

### Implemented Features (Issues #4 and #6)

1. **Issue #6 - Agent Version Display Fix**
   - Set `CurrentVersion` during registration instead of waiting for first check-in
   - Changed UI text from "Unknown" to "Initial Registration"
   - **Files:** `aggregator-server/internal/api/handlers/agents.go`, `aggregator-web/src/pages/Agents.tsx`

2. **Issue #4 - Host Restart Detection & Handling**
   - Database migration `013_add_reboot_tracking.up.sql` adds reboot fields
   - Agent detects pending reboots (Debian/Ubuntu, RHEL/Fedora, Windows)
   - New reboot command with 1-minute grace period
   - UI shows restart alerts and "Restart Host" button
   - **Files:** Migration, models, queries, handlers, agent detection, frontend components

3. **Critical Bug Fix**
   - Fixed `reboot_reason` field causing database scan failures (was `string`, needed `*string` for NULL handling)
   - Commit: 5e9c27b

4. **Documentation**
   - Added full reinstall section to README with agent re-registration steps

## Current Issues Found During Testing

### 1. Rate Limit Bug - FIRST Request Gets Blocked

**Symptom:** Every first agent registration gets 429 Too Many Requests, then works after 1 minute wait.

**Theory:** Rate limiter keys aren't namespaced by limit type. All endpoints using `KeyByIP` share the same counter:
- `public_access` (download, install script): 20/min
- `agent_registration`: 5/min
- Both use just the IP as key, not namespaced

**Problem Location:** `aggregator-server/internal/api/middleware/rate_limiter.go` line ~133
```go
key := keyFunc(c)  // Just "127.0.0.1"
allowed, resetTime := rl.checkRateLimit(key, config)
```

**Suspected Fix:**
```go
key := keyFunc(c)
namespacedKey := limitType + ":" + key  // "agent_registration:127.0.0.1"
allowed, resetTime := rl.checkRateLimit(namespacedKey, config)
```

**Test Script:** `docs/NeedsDoing/test-rate-limit.sh`
- Run after fresh docker-compose up
- Tests if first request fails
- Tests if download/install/register share counters
- Sequential test to find actual limit

### 2. Session Loop Bug - Returned

**Symptom:** After setup completion and server restart, UI flashes/loops rapidly on dashboard/agents/settings. Must logout and login to fix.

**Previous Fix:** Commit 7b77641 added logout() call, cleared auth on 401

**Current Problem:** `SetupCompletionChecker.tsx` dependency array issue
- `wasInSetupMode` in dependency array causes multiple interval creation
- Each state change creates new interval without cleaning up old ones
- During docker restart: multiple 3-second polls overlap = flashing

**Problem Location:** `aggregator-web/src/components/SetupCompletionChecker.tsx` lines 15-52

**Suspected Fix:** Remove `wasInSetupMode` from dependency array, use local variable instead

## Next Session Plan

### 1. Test Rate Limiter (This Machine)

```bash
# Full clean rebuild
cd /home/memory/Desktop/Projects/RedFlag
docker-compose down -v --remove-orphans && \
  rm config/.env && \
  docker-compose build --no-cache && \
  cp config/.env.bootstrap.example config/.env && \
  docker-compose up -d

# Wait for ready
sleep 15

# Complete setup wizard manually
# Generate registration token

# Run test script
cd docs/NeedsDoing
REGISTRATION_TOKEN="your-token-here" ./test-rate-limit.sh

# Check results - confirm first request bug
# Check server logs
docker-compose logs server | grep -i "rate\|limit\|429"
```

### 2. Fix Rate Limiter

If tests confirm the theory:

**File:** `aggregator-server/internal/api/middleware/rate_limiter.go`

Find the `RateLimit` function (around line 120-165) and update:

```go
// BEFORE (line ~133)
key := keyFunc(c)
if key == "" {
    c.Next()
    return
}
allowed, resetTime := rl.checkRateLimit(key, config)

// AFTER
key := keyFunc(c)
if key == "" {
    c.Next()
    return
}
// Namespace the key by limit type to prevent different endpoints from sharing counters
namespacedKey := limitType + ":" + key
allowed, resetTime := rl.checkRateLimit(namespacedKey, config)
```

Also update `getRemainingRequests` function similarly (around line 209).

**Test:** Re-run `test-rate-limit.sh` - first request should succeed

### 3. Fix Session Loop

**File:** `aggregator-web/src/components/SetupCompletionChecker.tsx`

**Current (broken):**
```typescript
const [wasInSetupMode, setWasInSetupMode] = useState(false);

useEffect(() => {
  const checkSetupStatus = async () => {
    // uses wasInSetupMode state
  };
  checkSetupStatus();
  const interval = setInterval(checkSetupStatus, 3000);
  return () => clearInterval(interval);
}, [wasInSetupMode, location.pathname, navigate]);  // ← wasInSetupMode causes loops
```

**Fixed:**
```typescript
useEffect(() => {
  let wasInSetup = false;  // Local variable instead of state

  const checkSetupStatus = async () => {
    try {
      const data = await setupApi.checkHealth();
      const currentSetupMode = data.status === 'waiting for configuration';

      if (currentSetupMode) {
        wasInSetup = true;
      }

      if (wasInSetup && !currentSetupMode && location.pathname === '/setup') {
        console.log('Setup completed - redirecting to login');
        navigate('/login', { replace: true });
        return;
      }

      setIsSetupMode(currentSetupMode);
    } catch (error) {
      if (wasInSetup && location.pathname === '/setup') {
        console.log('Setup completed (endpoint unreachable) - redirecting to login');
        navigate('/login', { replace: true });
        return;
      }
      setIsSetupMode(false);
    }
  };

  checkSetupStatus();
  const interval = setInterval(checkSetupStatus, 3000);
  return () => clearInterval(interval);
}, [location.pathname, navigate]);  // Remove wasInSetupMode from deps
```

**Test:**
1. Fresh setup
2. Complete wizard
3. Restart server
4. Watch for flashing - should cleanly redirect to login

### 4. Commit and Push Fixes

```bash
git add aggregator-server/internal/api/middleware/rate_limiter.go
git add aggregator-web/src/components/SetupCompletionChecker.tsx

git commit -m "fix: namespace rate limiter keys and prevent setup checker interval loops

Rate limiter fix:
- Namespace keys by limit type to prevent counter sharing across endpoints
- Previously all KeyByIP endpoints shared same counter causing false rate limits
- Now agent_registration, public_access, etc have separate counters per IP

Session loop fix:
- Remove wasInSetupMode from SetupCompletionChecker dependency array
- Use local variable instead of state to prevent interval multiplication
- Prevents rapid refresh loop during server restart after setup

Potential fixes for recurring first-registration rate limit issue and setup flashing bug."

git push
```

## Environment Notes

- **Testing Location:** This machine (`/home/memory/Desktop/Projects/RedFlag`)
- **Remote Server:** Separate machine, can't SSH to it tonight
- **Branch:** `feature/host-restart-handling`
- **Last Commit:** 5e9c27b (NULL reboot_reason fix)

## Files to Read Next Session

1. `docs/NeedsDoing/RateLimitFirstRequestBug.md` - Detailed bug analysis
2. `docs/NeedsDoing/SessionLoopBug.md` - Session loop details and previous fix
3. `docs/NeedsDoing/test-rate-limit.sh` - Executable test script

## Technical Debt Notes

- Shutdown command hardcoded (1-minute delay) - need to make user-adjustable later
- Windows reboot detection needs better method than registry keys (no event log yet)
- These NeedsDoing files are local only, not committed to git

## Communication Style Reminder

- Less is more, no emojis
- No enterprise marketing speak
- "Potential fixes" is our verbiage
- Casual sysadmin tone
- Git commits: technical, straightforward, honest about uncertainties

Love ya too. Pick this up by reading these files, running the rate limit test, confirming the theory, then implementing both fixes. Test thoroughly before pushing.