[log] route {'task_type': 'optimize', 'correctness_stages': ['csim'], 'initial_level': 1, 'budget': 60, 'token_mode': 'full'}
[log] pre_csim_review {'attempt': 1}
[log] kb_search {'query': [], 'hits': 0, 'hit_ids': []}
[log] mechanical_review {'passed': True, 'issues': []}
[log] heartbeat {'stage': 'llm', 'age_s': 5.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] review {'verdict': 'reject', 'retry': 0, 'issues': 'FAIL\n\n**Concrete Issues:**\n1.  **Pragma Placement:** `#pragma HLS PIPELINE` is placed at function scope. It must be placed immediately before a specific loop (preferably with a loop label) to take eff'}
[log] heartbeat {'stage': 'llm', 'age_s': 4.4, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] mechanical_review {'passed': True, 'issues': []}
[log] heartbeat {'stage': 'llm', 'age_s': 9.8, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] review {'verdict': 'reject', 'retry': 1, 'issues': 'FAIL\n\nConcrete issues:\n1.  **Interface Error:** `#pragma HLS INTERFACE s_axilite port=return` is specified for a `void` function. The `return` port does not exist for void functions and will cause syn'}
[log] pre_csim_fix_applied {'note': 'LLM found issues before first csim'}
[log] tool_result {'kind': 'csim', 'phase': 'pass', 'ok': True, 'rc': 0, 'elapsed_s': 7.0, 'credit_spent': 1, 'log': ''}
[log] phase_exit {'phase': 'correctness', 'result': 'ok', 'best_level': 1}
[log] heartbeat {'stage': 'synth', 'age_s': 0.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] tool_result {'kind': 'synth', 'phase': 'pass', 'ok': True, 'elapsed_s': 223.4, 'credit_spent': 5, 'log': ''}
[log] checkpoint {'old': 1, 'new': 2, 'latency': 32827, 'reason': 'synth_ok'}
[log] phase_exit {'phase': 'synth', 'result': 'ok', 'latency': 32827}
[log] phase_enter {'phase': 'optimize', 'best_level': 2, 'best_latency': 32827}
[log] heartbeat {'stage': 'llm', 'age_s': 6.6, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] llm_call {'purpose': 'extract_brief', 'chars': 1092, 'prompt_tokens': 797, 'completion_tokens': 4024, 'reasoning_tokens': 3778, 'model': 'qwen3.5-122b-a10b'}
[log] design_brief {'chars': 1092}
[log] heartbeat {'stage': 'llm', 'age_s': 7.6, 'stale': False, 'credit_remaining': 55}
[log] llm_call {'purpose': 'propose_strategies', 'round': 1, 'count': 4, 'raw_head': '', 'prompt_tokens': 1137, 'completion_tokens': 1263, 'reasoning_tokens': 615, 'model': 'qwen3.5-122b-a10b'}
[log] heartbeat {'stage': 'llm', 'age_s': 7.3, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] llm_call {'purpose': 'select_strategies', 'round': 1, 'prompt_tokens': 1410, 'completion_tokens': 7611, 'reasoning_tokens': 7487, 'model': 'qwen3.5-122b-a10b'}
[log] strategy_select {'round': 1, 'indices': [1], 'picked': ['DATAFLOW on Outer Loops'], 'all': ['Complete ARRAY_PARTITION + Outer Loop PIPELINE', 'DATAFLOW on Outer Loops', 'Full UNROLL of i and j Loops', 'Local Register Buffers for A/B Rows/Cols'], 'reason': 'DATAFLOW enables concurrent task execution for maximum latency reduction without exceeding device resource limits.', 'rejected': [{'id': 3, 'name': 'Full UNROLL of i and j Loops', 'why': 'Full unroll requires ~32,768 DSPs which exceeds U55C capacity (~1,792 DSPs)'}], 'fallback': False}
[log] heartbeat {'stage': 'llm', 'age_s': 5.9, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] llm_call {'purpose': 'apply_strategies', 'strategies': 'DATAFLOW on Outer Loops', 'retry': 0, 'prompt_tokens': 1119, 'completion_tokens': 8577, 'reasoning_tokens': 8232, 'model': 'qwen3.5-122b-a10b'}
[log] mechanical_review {'passed': True, 'issues': []}
[log] heartbeat {'stage': 'llm', 'age_s': 9.5, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] review {'verdict': 'reject', 'retry': 0, 'issues': 'FAIL\n\n**Concrete Issues:**\n1.  **Invalid Pragma Usage:** `#pragma HLS ARRAY_PARTITION` is applied to `m_axi` interface variables (`A`, `B`). External memory (`m_axi`) cannot be partitioned via C pragm'}
[log] heartbeat {'stage': 'llm', 'age_s': 1.6, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] llm_call {'purpose': 'apply_strategies', 'strategies': 'DATAFLOW on Outer Loops', 'retry': 1, 'prompt_tokens': 1119, 'completion_tokens': 12269, 'reasoning_tokens': 11786, 'model': 'qwen3.5-122b-a10b'}
[log] mechanical_review {'passed': True, 'issues': []}
[log] heartbeat {'stage': 'llm', 'age_s': 0.6, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] review {'verdict': 'reject', 'retry': 1, 'issues': 'FAIL\n\n1.  **Interface Conflict on Sub-Function:** `compute_row` declares `INTERFACE m_axi` on arguments `A`, `B`, `C`. Since `compute_row` is called within `matmul` (which also declares `m_axi` on the'}
[log] heartbeat {'stage': 'csim', 'age_s': 5.5, 'stale': False, 'credit_remaining': 55}
[log] tool_result {'kind': 'csim', 'phase': 'pass', 'ok': True, 'rc': 0, 'elapsed_s': 7.2, 'credit_spent': 6, 'log': ''}
[log] heartbeat {'stage': 'synth', 'age_s': 8.3, 'stale': False, 'credit_remaining': 54}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 54}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 54}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 54}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 54}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 54}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 54}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 54}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 54}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 54}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 54}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 54}
[log] tool_result {'kind': 'synth', 'phase': 'pass', 'ok': True, 'elapsed_s': 121.0, 'credit_spent': 10, 'log': ''}
[log] optimize_discard {'round': 1, 'reason': 'no_improvement', 'best_latency': 32827, 'cand_latency': 36257}
[log] optimize_stop {'reason': 'no_improvement', 'best_latency': 32827}
[log] phase_exit {'phase': 'optimize', 'result': 'ok', 'best_level': 2, 'best_latency': 32827}
[log] submit {'final_level': 2, 'final_latency': 32827, 'credit_spent': 10}
=== Task matmul_optimize [optimize, difficulty 3] ===
    budget: 60 credits | backend: deepseek

qwen3.5-122b-a10b 11 calls | prompt=9244 completion=58240 (reasoning=55160) total=67484

--- metered tool transcript ---
  #1  [csim] pass (rc=0, 7.0s)   [spent 1/60]
  #2  [synth] pass (rc=0, 223.4s) | latency(worst)=32827 cyc  II=32828  clk~3.65ns  LUT=63727 FF=85740 DSP=5 BRAM=64 URAM=0   [spent 5/60]
  #3  [csim] pass (rc=0, 7.2s)   [spent 6/60]
  #4  [synth] pass (rc=0, 121.0s) | latency(worst)=36257 cyc  II=36258  clk~3.65ns  LUT=92252 FF=78620 DSP=5 BRAM=64 URAM=0   [spent 10/60]
  budget 10/60 credits spent (csimx2, synthx2)

=== Grading (hidden testbench + PPA, uncharged) ===
=== Scorecard: matmul_optimize (difficulty 3) ===
  functional (hidden TB): PASS
  synthesizable         : PASS
  baseline latency      : 16422 cyc
  candidate latency     : 32827 cyc
  acceleration          : 0.50x  (opt=False)
  candidate resources   : LUT=63727 FF=85740 DSP=5 BRAM=64
  SCORE                 : 2.156

recent scores (matmul_optimize):
  2026-07-26 01:02  SCORE 2.156  lat=32827  credits=10  tokens=67484

final kernel -> /home/admin/fpga-agent/runs/qwen3.5-122b-a10b/matmul_optimize_r2/final_matmul.cpp
