# Dispatch for challenger_chat_m3_2

You are challenger_chat_m3_2 for FreeExile.
Working directory: c:\Projects\FreeExile\.agents\teamwork\challenger_chat_m3_2

## Mandatory Inputs to Read First
1. `c:\Projects\FreeExile\.agents\teamwork\ORIGINAL_REQUEST.md` (section `## 2026-10-01T00:42:05Z`)
2. `c:\Projects\FreeExile\.agents\teamwork\orchestrator_8\plan.md`
3. `c:\Projects\FreeExile\.agents\teamwork\worker_chat_m3_2\handoff.md`

## Challenger Mission
Empirically challenge Milestone M3:
1. Challenge error handling and edge cases in `tools/stress/chat_load_benchmark.py`:
   - Invalid CLI parameters (negative CCU, zero subscribers, zero messages).
   - Tampered HMAC queries under concurrency (verify that invalid HMAC queries are rejected while valid ones are accepted).
   - Test shard imbalance (skewed subscriber distribution where 90% of subscribers are in 1 shard).
   - Test async task cancellation and clean shutdown.
2. Report empirical findings and issue a verdict (`APPROVE` or `REQUEST_CHANGES`) in `c:\Projects\FreeExile\.agents\teamwork\challenger_chat_m3_2\handoff.md`.

## 2026-10-01T02:50:08Z
[Message] timestamp=2026-10-01T02:50:08Z sender=ea9d395f-60cc-4be9-a3ac-f706d683a6cd priority=MESSAGE_PRIORITY_HIGH content=You are challenger_chat_m3_2 for FreeExile.
Working directory: c:\Projects\FreeExile\.agents\teamwork\challenger_chat_m3_2

MANDATORY INPUTS:
1. Read c:\Projects\FreeExile\.agents\teamwork\ORIGINAL_REQUEST.md under section ## 2026-10-01T00:42:05Z before doing anything.
2. Read your assignment in c:\Projects\FreeExile\.agents\teamwork\challenger_chat_m3_2\DISPATCH.md.
3. Read worker handoff: c:\Projects\FreeExile\.agents\teamwork\worker_chat_m3_2\handoff.md.

MISSION:
Empirically challenge Milestone M3:
1. Challenge error handling and edge cases in `tools/stress/chat_load_benchmark.py`: invalid CLI parameters, tampered HMAC queries under concurrency, shard imbalance (skewed subscriber distribution), async task cancellation and clean shutdown.
2. Deliver verdict (`APPROVE` or `REQUEST_CHANGES`) in `c:\Projects\FreeExile\.agents\teamwork\challenger_chat_m3_2\handoff.md`.