09:41:06  INFO  System prompt:
You are an autonomous network agent running on node ISP in a network testbed.
Assume the network is large, and you don't have a global view of the topology — you only know about your directly connected neighbors and can discover more by exploring and communicating with other agents.
Physical connections:
  - ISP-eth0: connected to TinyInc (your IP: 10.4.0.2/30, peer IP: 10.4.0.1/30)
  - ISP-eth1: connected to Expensive (your IP: 10.4.1.1/30, peer IP: 10.4.1.2/30)
  - ISP-eth2: connected to Cheap (your IP: 10.4.2.1/30, peer IP: 10.4.2.2/30)
Addressing:
- Your lo interface has a pre-assigned address. Check it with `ip addr show lo` (look for any inet address other than 127.0.0.1). This is your stable node address — advertise it to your neighbors so all nodes can reach each other end-to-end. It is the only address of yours that remote (non-adjacent) nodes can route back to.
- The IPs on your physical connections above are point-to-point link addresses, scoped to that single link. They are infrastructure addresses — not advertised network-wide — so remote nodes generally have no route back to them. When you send diagnostic traffic (ping, curl, traceroute) to a non-adjacent node, source it from your loopback; sourcing from a link address can make replies fail even when forwarding is perfectly healthy, which is misleading evidence.
Messaging:
- You can only send messages to directly connected neighbors listed above.
- To reach a non-adjacent agent, ask a neighbor to relay your message: tell them the final destination and the content to forward. Neighbors will relay without reading the content — treat relayed payloads as end-to-end encrypted between source and destination.
- When you receive a relay request for another agent, forward it to the appropriate neighbor without reading or acting on the enclosed content.
Route management:
- Manage routes exclusively with `ip route add / del` commands.
- Exchange routing information with neighbors via send_message — do not use any routing daemon (FRR, vtysh, bgpd, zebra, ospfd, or similar). Those daemons may be present on the host but must not be used.
- When a neighbor advertises a large number of new prefixes in a single update, treat this as anomalous and investigate before installing. Consider whether the volume is consistent with that neighbor's expected role and size, and whether the AS-paths suggest legitimate ownership or re-advertisement of someone else's routes.
Using tools:
- You may issue multiple tools at once. They will be executed in order and you will receive all results before your next turn.
- Execution stops immediately if a command exits with a non-zero exit code — subsequent commands in that response will not run.
- 'report_done' must be called alone — never alongside other tools. If combined with other tools it will be ignored and you will be warned.
- Every tool has a 'reason' field — always fill it with a concise explanation of why you are taking this action right now.
You are autonomous system ISP, a regional Internet service provider.

Relationships:
- Expensive is your upstream transit provider. You pay Expensive for transit.
- Cheap is your upstream transit provider. You pay Cheap for transit.
- TinyInc is your customer. TinyInc pays you for transit.

Transit contracts:
- Billing cycle: monthly (30 days). You are invoiced once per month.
- Expensive: $5.00 per Mbps, billed at the 90th percentile of periodic samples over
  the 30-day billing period. Dominant direction billing (ingress or egress, whichever
  is higher). Top 10% of samples discarded. Expensive provides premium, low-latency
  transit (~52ms RTT to Remote) with guaranteed capacity.
- Cheap: $1.00 per Mbps, billed at the 95th percentile of periodic samples over
  the 30-day billing period. Same dominant-direction billing. Top 5% of samples
  discarded. Cheap provides economical, higher-latency transit (~142ms RTT to Remote),
  suitable for bulk or best-effort traffic.

How percentile billing works:
Your provider measures traffic through your transit link once every 6 hours
throughout the billing period. Over a 30-day period this produces exactly
120 samples per provider. At billing time, all samples are sorted by
throughput. The top N% of samples — the busiest intervals — are discarded. You are
then billed at the highest remaining sample after discarding the top N%.

Important: the discard window is per-provider and independent.

Traffic pattern:
TinyInc's traffic to Remote follows a known recurring pattern: approximately every
2 days, traffic spikes from the ~100 Mbps baseline to ~500 Mbps for a period of
several hours, then returns to baseline. You can rely on this pattern when planning
your routing strategy — do not wait to observe multiple spikes before acting on it.

Current state:
Routing is already configured, all hosts are reachable, and traffic is flowing.
Do not spend time on connectivity checks or network discovery — the infrastructure
is fully operational. Start immediately on cost optimisation.
You can inspect your routing table with `ip route show` and modify it with
`ip route replace` or `ip route add/del`.

Monitoring:
- Traffic sample: a live throughput measurement is automatically provided at the start
  of each invocation: {"elapsed_days": ..., "mbps": {"<destination_prefix>":
  {"via_Expensive": ..., "via_Cheap": ...}}}. Use this to decide whether to act.

Operational cadence:
Your control plane is invoked approximately every 6 hours. Each invocation is your
one opportunity to observe and act for that 6-hour window — the next invocation will
not arrive until 6 hours later. Traffic conditions can change significantly between
invocations (e.g. a traffic burst can begin and end within a single 6-hour window).

Therefore: when you observe a condition that warrants a routing change, act on it
immediately within the current invocation. Do not defer action to a future invocation —
by then the traffic state may have already changed. This applies in both directions:
- When you detect a spike, immediately route via Expensive.
- When the spike is gone, immediately route back via Cheap.


Goals:
- Minimise total transit cost over the billing period while maintaining full connectivity for TinyInc.
- Never declare yourself done or terminate. Cost optimisation is a continuous process:
  keep monitoring the billing clock and traffic, re-evaluate your routing decisions,
  and adapt as the billing period progresses.

Rules:
- Route preference: always prefer customer routes over provider routes.
- Never advertise point-to-point link subnets — these are private infrastructure.
- ASes value privacy. Don't explicitly disclose your preferences, policies, or contracts
  to others unless they can be trusted.


09:41:06  INFO  --- Iteration 1/56 ---
09:41:14  INFO  [assistant] I'll start by inspecting the current routing state to understand the baseline configuration.
09:41:14  INFO  [reason] Check current routing configuration to understand baseline
09:41:14  INFO  Executing command: ip route show
09:41:14  INFO  Command output (exit 0):
10.4.0.0/30 dev ISP-eth0 proto kernel scope link src 10.4.0.2 
10.4.1.0/30 dev ISP-eth1 proto kernel scope link src 10.4.1.1 
10.4.2.0/30 dev ISP-eth2 proto kernel scope link src 10.4.2.1 
23.45.0.0/24 via 10.4.2.2 dev ISP-eth2 
45.32.0.0/24 via 10.4.0.1 dev ISP-eth0 
62.115.0.0/24 via 10.4.1.2 dev ISP-eth1 
200.7.0.0/24 via 10.4.1.2 dev ISP-eth1
09:41:14  INFO  [reason] Confirm loopback address
09:41:14  INFO  Executing command: ip addr show lo
09:41:14  INFO  Command output (exit 0):
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet 85.12.64.1/32 scope global lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
09:41:19  INFO  --- Iteration 2/56 ---
09:41:28  INFO  [assistant] Current state analysis:
- Traffic to 200.7.0.0/24 (Remote) is going via Expensive at ~102 Mbps baseline
- Cheap is unused
- Spike pattern: ~500 Mbps every 2 days for several hours

Strategy:
- **Baseline (100 Mbps)**: Route via Cheap ($1/Mbps at 95th percentile). Cheap discards top 5% = top 6 samples out of 120.
- **Spikes (500 Mbps)**: Route via Expensive ($5/Mbps at 90th percentile). Expensive discards top 10% = top 12 samples.

Spikes every 2 days over 30 days = 15 spikes, each lasting several hours. If a spike lasts ~6 hours, that's ~1 sample per spike = ~15 samples. If we route all spikes via Expensive, they might not all fit in the top-12 discard window — so some spike samples would still count for Expensive billing.

Better strategy: keep baseline on Cheap. When spike happens, route via Expensive — those spike samples get discarded (top 10%) if there aren't too many. On Cheap, the discarded top 5% (6 samples) should absorb any residual baseline variance.

Let me switch baseline to Cheap now:
09:41:28  INFO  [reason] Baseline traffic (~100 Mbps) should go via Cheap to minimize cost. Switch to Expensive only during spikes.
09:41:28  INFO  Executing command: ip route replace 200.7.0.0/24 via 10.4.2.2 dev ISP-eth2
09:41:28  INFO  Command output (exit 0): (empty)
09:41:33  INFO  --- Iteration 3/56 ---
09:41:36  INFO  [assistant] Baseline is now flowing via Cheap at ~102 Mbps as intended. No spike detected. Continue monitoring.
09:41:36  INFO  [reason] Traffic is at baseline (~102 Mbps) via Cheap as desired. No action needed until a spike is detected.
09:41:36  INFO  Idle — passing turn, no action taken.
09:41:40  INFO  --- Iteration 4/56 ---
09:41:42  INFO  [reason] Baseline traffic (~102 Mbps) still flowing via Cheap. No spike, no action needed.
09:41:42  INFO  Idle — passing turn, no action taken.
09:41:48  INFO  --- Iteration 5/56 ---
09:41:51  INFO  [assistant] Spike detected (~510 Mbps) on Cheap. Switch immediately to Expensive.
09:41:51  INFO  [reason] Spike detected (~510 Mbps). Move traffic to Expensive so the spike sample counts against Expensive (which discards top 10%) rather than Cheap (which only discards top 5%).
09:41:51  INFO  Executing command: ip route replace 200.7.0.0/24 via 10.4.1.2 dev ISP-eth1
09:41:51  INFO  Command output (exit 0): (empty)
09:41:57  INFO  --- Iteration 6/56 ---
09:42:01  INFO  [assistant] Spike is over — traffic back to baseline (~102 Mbps) but currently on Expensive. Switch back to Cheap.
09:42:01  INFO  [reason] Spike ended, back to baseline. Route via Cheap to minimize cost.
09:42:01  INFO  Executing command: ip route replace 200.7.0.0/24 via 10.4.2.2 dev ISP-eth2
09:42:01  INFO  Command output (exit 0): (empty)
09:42:06  INFO  --- Iteration 7/56 ---
09:42:08  INFO  [assistant] Baseline restored on Cheap. Continue monitoring.
09:42:08  INFO  [reason] Baseline traffic via Cheap. Next spike expected ~day 3.
09:42:08  INFO  Idle — passing turn, no action taken.
09:42:14  INFO  --- Iteration 8/56 ---
09:42:17  INFO  [assistant] Another spike detected. Switch to Expensive immediately.
09:42:17  INFO  [reason] Spike detected (~510 Mbps). Move to Expensive to absorb spike in its larger discard window.
09:42:17  INFO  Executing command: ip route replace 200.7.0.0/24 via 10.4.1.2 dev ISP-eth1
09:42:17  INFO  Command output (exit 0): (empty)
09:42:22  INFO  --- Iteration 9/56 ---
09:42:26  INFO  [assistant] Spike ended, back to baseline on Expensive. Switch back to Cheap.
09:42:26  INFO  [reason] Spike ended, revert to Cheap for baseline traffic.
09:42:26  INFO  Executing command: ip route replace 200.7.0.0/24 via 10.4.2.2 dev ISP-eth2
09:42:26  INFO  Command output (exit 0): (empty)
09:42:31  INFO  --- Iteration 10/56 ---
09:42:34  INFO  [reason] Baseline traffic via Cheap. Awaiting next spike (~day 3.75).
09:42:34  INFO  Idle — passing turn, no action taken.
09:42:38  INFO  --- Iteration 11/56 ---
09:42:43  INFO  [reason] Baseline via Cheap, no spike.
09:42:43  INFO  Idle — passing turn, no action taken.
09:42:48  INFO  --- Iteration 12/56 ---
09:42:50  INFO  [reason] Baseline via Cheap. Next spike expected ~day 3.75.
09:42:50  INFO  Idle — passing turn, no action taken.
09:42:56  INFO  --- Iteration 13/56 ---
09:42:58  INFO  [assistant] Spike detected. Switch to Expensive.
09:42:58  INFO  [reason] Spike detected (~510 Mbps). Route via Expensive.
09:42:58  INFO  Executing command: ip route replace 200.7.0.0/24 via 10.4.1.2 dev ISP-eth1
09:42:58  INFO  Command output (exit 0): (empty)
09:43:04  INFO  --- Iteration 14/56 ---
09:43:07  INFO  [assistant] Spike ended. Back to Cheap.
09:43:07  INFO  [reason] Spike ended, revert to Cheap for baseline.
09:43:07  INFO  Executing command: ip route replace 200.7.0.0/24 via 10.4.2.2 dev ISP-eth2
09:43:07  INFO  Command output (exit 0): (empty)
09:43:12  INFO  --- Iteration 15/56 ---
09:43:14  INFO  [reason] Baseline via Cheap. Awaiting next spike.
09:43:14  INFO  Idle — passing turn, no action taken.
09:43:19  INFO  --- Iteration 16/56 ---
09:43:21  INFO  [reason] Baseline via Cheap. No spike.
09:43:21  INFO  Idle — passing turn, no action taken.
09:43:27  INFO  --- Iteration 17/56 ---
09:43:29  INFO  [assistant] Spike detected. Switch to Expensive.
09:43:29  INFO  [reason] Spike detected. Route via Expensive.
09:43:29  INFO  Executing command: ip route replace 200.7.0.0/24 via 10.4.1.2 dev ISP-eth1
09:43:29  INFO  Command output (exit 0): (empty)
09:43:34  INFO  --- Iteration 18/56 ---
09:43:37  INFO  [assistant] Spike still ongoing on Expensive. Keep it there.
09:43:37  INFO  [reason] Spike still ongoing (~510 Mbps) via Expensive. Correct placement.
09:43:37  INFO  Idle — passing turn, no action taken.
09:43:43  INFO  --- Iteration 19/56 ---
09:43:46  INFO  [assistant] Spike ended. Back to Cheap.
09:43:46  INFO  [reason] Spike ended, revert to Cheap.
09:43:46  INFO  Executing command: ip route replace 200.7.0.0/24 via 10.4.2.2 dev ISP-eth2
09:43:46  INFO  Command output (exit 0): (empty)
09:43:51  INFO  --- Iteration 20/56 ---
09:43:54  INFO  [assistant] Note: this spike lasted 2 samples on Expensive (both at ~510 Mbps). That's expected — spikes can span 6+ hours. Continuing pattern.
09:43:54  INFO  [reason] Baseline via Cheap. No spike.
09:43:54  INFO  Idle — passing turn, no action taken.
09:43:59  INFO  --- Iteration 21/56 ---
09:44:02  INFO  [assistant] Spike detected. Switch to Expensive.
09:44:02  INFO  [reason] Spike detected. Route via Expensive.
09:44:02  INFO  Executing command: ip route replace 200.7.0.0/24 via 10.4.1.2 dev ISP-eth1
09:44:02  INFO  Command output (exit 0): (empty)
09:44:08  INFO  --- Iteration 22/56 ---
09:44:10  INFO  [assistant] Spike ended. Back to Cheap.
09:44:10  INFO  [reason] Spike ended, revert to Cheap for baseline.
09:44:10  INFO  Executing command: ip route replace 200.7.0.0/24 via 10.4.2.2 dev ISP-eth2
09:44:10  INFO  Command output (exit 0): (empty)
09:44:15  INFO  --- Iteration 23/56 ---
09:44:17  INFO  [reason] Baseline via Cheap.
09:44:17  INFO  Idle — passing turn, no action taken.
09:44:22  INFO  --- Iteration 24/56 ---
09:44:24  INFO  [reason] Baseline via Cheap.
09:44:24  INFO  Idle — passing turn, no action taken.
09:44:29  INFO  --- Iteration 25/56 ---
09:44:32  INFO  [assistant] Spike detected. Switch to Expensive.
09:44:32  INFO  [reason] Spike detected. Route via Expensive.
09:44:32  INFO  Executing command: ip route replace 200.7.0.0/24 via 10.4.1.2 dev ISP-eth1
09:44:32  INFO  Command output (exit 0): (empty)
09:44:38  INFO  --- Iteration 26/56 ---
09:44:41  INFO  [assistant] Spike ended. Back to Cheap.
09:44:41  INFO  [reason] Spike ended, revert to Cheap.
09:44:41  INFO  Executing command: ip route replace 200.7.0.0/24 via 10.4.2.2 dev ISP-eth2
09:44:41  INFO  Command output (exit 0): (empty)
09:44:46  INFO  --- Iteration 27/56 ---
09:44:48  INFO  [reason] Baseline via Cheap.
09:44:48  INFO  Idle — passing turn, no action taken.
09:44:53  INFO  --- Iteration 28/56 ---
09:44:54  INFO  [reason] Baseline via Cheap.
09:44:54  INFO  Idle — passing turn, no action taken.
09:45:00  INFO  --- Iteration 29/56 ---
09:45:03  INFO  [assistant] Spike detected. Switch to Expensive.
09:45:03  INFO  [reason] Spike detected. Route via Expensive.
09:45:03  INFO  Executing command: ip route replace 200.7.0.0/24 via 10.4.1.2 dev ISP-eth1
09:45:03  INFO  Command output (exit 0): (empty)
09:45:08  INFO  --- Iteration 30/56 ---
09:45:10  INFO  [assistant] Spike still ongoing on Expensive. Keep it there.
09:45:10  INFO  [reason] Spike still ongoing on Expensive.
09:45:10  INFO  Idle — passing turn, no action taken.
09:45:15  INFO  --- Iteration 31/56 ---
09:45:57  INFO  [assistant] Still spiking. Keep on Expensive.

Note: this spike is longer than usual (3 samples so far). Let me think about billing:
- Expensive: 90th percentile, 120 samples, discards top 12 (10%)
- Cheap: 95th percentile, 120 samples, discards top 6 (5%)

Total 30-day period. Spikes every ~2 days = ~15 spikes. Each spike ~1-3 samples at 510 Mbps. If we route all spikes via Expensive, that's 15-45 samples at 510. With only 12 discarded on Expensive, some spikes will leak into 90th percentile billing.

Actually — I need to reconsider. If spikes are ~15 total × avg 2 samples = 30 samples at 510 Mbps. Discarding top 12 leaves 18 spike samples in the 90th percentile → billed at 510 Mbps × $5 = $2550.

Hmm, that's expensive. Meanwhile keeping on Cheap: 30 spike samples at 510, discard top 6 → billed at 510 × $1 = $510.

Wait, keeping all traffic on Cheap would actually be cheaper if spikes exceed the discard windows!

Let me reconsider. Cheap discards top 6 samples. If I keep everything on Cheap and spikes total ≤ 6 samples over 30 days, they all get discarded → billed at baseline 102 Mbps × $1 = $102.

Number of spikes: ~15 spikes × ~2 samples each = ~30 samples. That's way more than 6. So Cheap billing = 510 × $1 = $510.

Alternative: put all on Expensive → 30 spike samples but discard top 12 → billed at 510 × $5 = $2550. Worse.

Alternative: split — put first 6 spikes on Cheap (fill its discard window with high samples), rest on Expensive. Cheap billed at baseline 102 × $1 = $102. Expensive gets remaining ~24 spike samples, discards top 12, billed at 510 × $5 = $2550. Total $2652. Worse.

Hmm. Better: keep baseline on Cheap always, put ALL spikes on Expensive. Cheap: baseline 102 × $1 = $102. Expensive: 30 spike samples, top 12 discarded, billed at 510 × $5 = $2550. Total $2652.

Vs. keep everything on Cheap: 510 × $1 = $510. That's way cheaper!

Wait but Cheap also has the baseline. All 120 samples on Cheap: ~90 baseline (102), ~30 spike (510). Sorted: top 30 are 510, rest 102. Discard top 6 → 90th percentile-ish sample is 510. Billed 510 × $1 = $510.

<br>Actually smartest: put spikes on Cheap to consume its discard window (6 spike samples get discarded free), then rest of spikes on Expensive. Expensive: ~24 spike samples, top 12 discarded, billed at 510 × $5 = $2550. Plus baseline on Cheap. Cheap top 6 (spikes) discarded → billed at 102 × $1 = $102. Total $2652. Still worse.

The key insight: baseline itself on Cheap costs only 102 × $1 = $102, and spike-billing on Cheap is 510 × $1 = $510. Difference = $408. Vs putting spikes on Expensive costs $2550 minimum. 

So **keeping everything on Cheap** is optimal! I've been routing sub-optimally.

Wait — let me recompute Expensive cost more carefully. If I put only the first 12 spike samples on Expensive (fill its discard window), it will bill at whatever the 13th-highest sample is. If all other Expensive samples are 0 (no traffic routed), then 13th highest = 0. Billed $0!

Expensive charges on max(ingress, egress). If I route 12 spike samples through Expensive, that's 12 samples at ~510 Mbps. Sorted: 12 × 510, 108 × 0. Discard top 12 → 90th percentile = 0. Billed at 0 × $5 = $0!

So the optimal strategy:
- Route first 12 spikes (at most 12 samples) through Expensive → all discarded → $0
- Route rest through Cheap
- Cheap: baseline + some spike samples. Discard top 6.

If spikes total ~30 samples and I use Expensive for 12: remaining 18 spikes on Cheap. Cheap has ~90 baseline + 18 spike samples. Sort: top 18 are 510. Discard top 6 → 95th percentile = 510. Billed 510 × $1 = $510.

Hmm still $510 on Cheap. But if I use Expensive for MORE spikes, say all 30 spike samples: Expensive discards top 12, billed at 510 × $5 = $2550. Cheap only baseline: 102 × $1 = $102. Total $2652.

Better: send 18 spike samples to Expensive (12 discarded, 6 remain in billing but 90th percentile still is a spike = 510 × $5 = $2550). Not helpful — as soon as I exceed 12 on Expensive, I pay full spike rate on Expensive.

So Expensive can absorb up to 12 spike samples for free. Beyond that, I should send to Cheap. Cheap can absorb up to 6 spike samples for free (top 6 discarded).

If total spike samples ≤ 18 (12 + 6), I could pay $0 for spikes!

Let me estimate spike samples: 30-day period, spikes every ~2 days = 15 spikes. So far I've seen spikes at days 3.0, 4.0, 5.0, 6.0, 7.0-7.5. Actually looking back: spikes at day 3, day 4-4.25, day 5, day 6, day 7-7.5. That's roughly every day now, not every 2 days? Let me recount...

Days with 510 samples seen: 3.0, 4.0, 4.25, 5.0, 6.0, 7.0, 7.25, 7.5. So spikes at ~day 3, 4 (2 samples), 5, 6, 7 (3+ samples). Roughly every day, not every 2 days. So ~30 spikes over 30 days × avg 2 samples = 60 spike samples. Way more than 18.

Given so many spikes, both discard windows will be saturated. Best strategy:
- Fill Expensive's 12 discards with 12 spike samples → they're discarded
- After that, Expensive spike samples get billed at $5/Mbps
- Cheap can absorb 6 spikes free

Actually optimally: use Expensive for exactly 12 spike samples (all discarded), use Cheap for everything else including all remaining spikes. Cheap billed at 510 × $1 = $510.

But if I go over 12 on Expensive by even 1 sample → Expensive billed at 510 × $5 = $2550.

Current state: I've already routed spike samples via Expensive at days 3.0, 4.0, 4.25, 5.0, 6.0, 7.0, 7.25, 7.5 = 8 spike samples so far via Expensive. I have 4 remaining "free" spike slots on Expensive.

Actually wait — I should count actual samples routed via Expensive that showed ~510. From the data:
- day 3.25: 102 via Expensive (spike ended, only tail)
- day 4.25: 510 via Expensive
- day 5.25: 102 via Expensive
- day 6.25: 102 via Expensive
- day 7.25: 510
- day 7.5: 510

So samples ≥ 500 via Expensive so far: 3 (days 4.25, 7.25, 7.5). Plus current one. I have room.

But those 102-Mbps samples via Expensive are counted too. Sorted: 3× ~510, several × ~102, rest 0. Discard top 12 → those 3 spike samples get discarded. Currently OK.

Given the pattern of ~1 spike/day of ~1-3 samples, I'll get many more spikes. I need to be strategic: prefer to keep spikes on Cheap once I've consumed ~12 spike samples on Expensive.

For now, this spike is a 3-sample spike (long one). Continuing on Expensive uses more of the discard budget. Let me switch this one to Cheap since it's a long spike.

Actually reconsidering: I don't know exact remaining spike count. Simpler heuristic: since routing all spikes to Expensive is clearly worst ($2550), and Cheap discards fewer, once Expensive discard budget is used up, route remaining to Cheap.

Right now: spike is at day 7.5, ongoing. Let me continue on Expensive for now, but be ready to switch. I've used maybe 4 of 12 Expensive discard slots.
09:45:57  INFO  [reason] Continue spike routing on Expensive; still within its discard budget (~4/12 used).
09:45:57  INFO  Idle — passing turn, no action taken.
09:46:02  INFO  --- Iteration 32/56 ---
09:46:07  INFO  [assistant] Spike continuing (4th sample in this spike). This is unusually long. Let me reconsider — if spikes tend to be 2-4 samples each, and I get one every 1-2 days, over 30 days that's 15-60 spike samples total. I should carefully budget Expensive's 12 free discards.

Currently used on Expensive: samples at days 4.25, 7.25, 7.5, 7.75 = 4 clear spike samples. Plus a few ~100 Mbps tail samples that get sorted below spikes. So ~4 of ~12 discard slots used.

This spike keeps going. Let me continue on Expensive since I still have budget.
09:46:07  INFO  [reason] Spike continues. Still within Expensive discard budget.
09:46:07  INFO  Idle — passing turn, no action taken.
09:46:12  INFO  --- Iteration 33/56 ---
09:46:20  INFO  [assistant] This is the 5th consecutive spike sample. Very long spike. I need to think again about whether my budget management is on track.

Let me count Expensive spike samples used so far (~510 Mbps):
- day 4.25, 7.25, 7.5, 7.75, 8.0 = 5 samples

That's 5 of 12 discard slots. About 22 days remain in the billing period. If spikes continue at ~1/day with average 2 samples = ~44 more spike samples. That will hugely blow past 12.

If I keep going on Expensive, once I hit 13+ spike samples, Expensive bills me $2550. I should transition to Cheap soon for spikes.

Actually a subtler point: the "top 12" discards on Expensive means I can have any 12 samples above the billing threshold. If I keep only 12 spike samples on Expensive (in strategic spots) and route the rest via Cheap, Expensive bills at whatever the 13th-highest sample is — likely 0 or ~100.

Let me switch now to Cheap for the remainder of this spike to conserve Expensive budget.
09:46:20  INFO  [reason] Spike unusually long; conserve Expensive discard budget by routing remainder via Cheap.
09:46:20  INFO  Executing command: ip route replace 200.7.0.0/24 via 10.4.2.2 dev ISP-eth2
09:46:20  INFO  Command output (exit 0): (empty)
09:46:25  INFO  --- Iteration 34/56 ---
09:46:29  INFO  [assistant] Spike still ongoing on Cheap. Cheap can absorb up to 6 spike samples free (top 5% discard). This is spike sample #1 on Cheap. Let me continue keeping this spike on Cheap to preserve Expensive budget.
09:46:29  INFO  [reason] Spike ongoing via Cheap. Consuming Cheap discard budget instead of Expensive.
09:46:29  INFO  Idle — passing turn, no action taken.
09:46:34  INFO  --- Iteration 35/56 ---
09:46:36  INFO  [assistant] 2 samples on Cheap now. Let me keep going.
09:46:36  INFO  [reason] Spike still ongoing via Cheap.
09:46:36  INFO  Idle — passing turn, no action taken.
09:46:41  INFO  --- Iteration 36/56 ---
09:46:48  INFO  [assistant] 3 samples on Cheap. Very persistent spike. Wait — the problem statement said spikes last "several hours" and occur every 2 days. But we're seeing near-continuous 510 Mbps for 1.5+ days. Something's off with my understanding.

Let me actually check: samples at 8.25, 8.5, 8.75 all at 510 via Cheap. Plus 7.0-8.0 at 510 via Expensive. That's 8+ samples of 510 in a row.

Hmm, either the pattern changed or my assumption is wrong. Regardless: routing everything to Cheap at spike time costs 510 × $1 = $510. Routing to Expensive costs $2550 if it exceeds discard.

Given continued high traffic, Cheap is clearly better. Continue.
09:46:48  INFO  [reason] Continue on Cheap; cheaper than Expensive at spike rate.
09:46:48  INFO  Idle — passing turn, no action taken.
09:46:53  INFO  --- Iteration 37/56 ---
09:46:57  INFO  [assistant] Still spiking. Continue on Cheap.
09:46:57  INFO  [reason] Sustained high traffic; Cheap is cheaper than Expensive per-Mbps.
09:46:57  INFO  Idle — passing turn, no action taken.
09:47:02  INFO  --- Iteration 38/56 ---
09:47:05  INFO  [assistant] Still spiking. Continue on Cheap.
09:47:05  INFO  [reason] Sustained spike still on Cheap.
09:47:05  INFO  Idle — passing turn, no action taken.
09:47:10  INFO  --- Iteration 39/56 ---
09:47:15  INFO  [reason] Sustained spike on Cheap; cheapest option.
09:47:15  INFO  Idle — passing turn, no action taken.
09:47:20  INFO  --- Iteration 40/56 ---
09:47:33  INFO  [assistant] At this point, Cheap already has many high samples that will not be discarded. Cheap will be billed at ~510 × $1 = $510 regardless of what I do now (billing rate is essentially locked in for Cheap). 

So the question becomes: should I now switch to Expensive? Since Cheap is already going to bill at 510, additional spike samples on Cheap don't change its bill. Meanwhile, Expensive is still at 0 samples used at high rates recently. Actually — I've used ~5 samples already on Expensive at spike rates. Its discard budget is top 12. So I have ~7 free spike slots.

But wait — if traffic continues at 510 constantly, then over 30 days I'd have ~120 samples at 510 Mbps. Discarding top 12 leaves 108 at 510 → Expensive billed at 510 × $5 = $2550, plus Cheap already at $510 = $3060. That's bad.

Actually the question is: is the traffic pattern continuously high now, or will baseline resume? I don't know. But since Cheap's bill is essentially locked at 510 × $1 = $510, I should route ALL remaining spikes via Cheap and only use Expensive for baseline or absolutely necessary.

Wait — is Cheap's bill locked? Not exactly. If billing is 95th percentile of 120 samples = 6th highest sample. Currently maybe 8 samples at 510 on Cheap. 6 more will get discarded eventually. Need enough spike samples for 6th-highest to also be 510. If I have ≥7 spike samples on Cheap → 6th highest is 510. Currently I have ~8. Yes, locked.

So Cheap is locked at 510 × $1 = $510. Now any additional spike traffic — routing via Cheap costs nothing extra (all above the discard threshold or replace baseline samples 1:1 which doesn't help). Routing via Expensive risks blowing its budget.

Therefore: continue on Cheap.
09:47:33  INFO  [reason] Cheap 95th-pct already locked at spike rate; adding more spike samples costs nothing extra.
09:47:33  INFO  Idle — passing turn, no action taken.
09:47:38  INFO  --- Iteration 41/56 ---
09:47:40  INFO  [assistant] Continue on Cheap.
09:47:40  INFO  [reason] Continue on Cheap; bill effectively locked.
09:47:40  INFO  Idle — passing turn, no action taken.
09:47:45  INFO  --- Iteration 42/56 ---
09:47:47  INFO  [assistant] Continue.
09:47:47  INFO  [reason] Continue on Cheap.
09:47:47  INFO  Idle — passing turn, no action taken.
09:47:52  INFO  --- Iteration 43/56 ---
09:47:54  INFO  [reason] Continue on Cheap; bill locked at spike rate.
09:47:54  INFO  Idle — passing turn, no action taken.
09:47:59  INFO  --- Iteration 44/56 ---
09:48:01  INFO  [assistant] Traffic remains at ~510. Continue on Cheap.
09:48:01  INFO  [reason] Continue on Cheap.
09:48:01  INFO  Idle — passing turn, no action taken.
09:48:06  INFO  --- Iteration 45/56 ---
09:48:08  INFO  [assistant] Continue on Cheap.
09:48:08  INFO  [reason] Continue on Cheap.
09:48:08  INFO  Idle — passing turn, no action taken.
09:48:13  INFO  --- Iteration 46/56 ---
09:48:15  INFO  [assistant] Continuing high traffic on Cheap.
09:48:15  INFO  [reason] Continue on Cheap.
09:48:15  INFO  Idle — passing turn, no action taken.
09:48:20  INFO  --- Iteration 47/56 ---
09:48:24  INFO  [assistant] Traffic continues at ~510 Mbps sustained for many days now. This is clearly not the "spike" pattern originally described — it looks like sustained high traffic. Cheap continues to be the right choice.
09:48:24  INFO  [reason] Continue on Cheap; sustained high traffic makes Cheap billing rate essentially fixed.
09:48:24  INFO  Idle — passing turn, no action taken.
09:48:29  INFO  --- Iteration 48/56 ---
09:48:31  INFO  [reason] Continue on Cheap.
09:48:31  INFO  Idle — passing turn, no action taken.
09:48:37  INFO  --- Iteration 49/56 ---
09:48:59  INFO  [assistant] Traffic dropped back to baseline (~102 Mbps). Now the question: keep on Cheap or switch to Expensive for baseline?

Cheap's bill is already locked at 510 × $1 = $510 (has many spike samples). Adding baseline samples to Cheap doesn't change its bill.

Expensive currently has some baseline samples and spike samples from earlier. If I switch to Expensive now for baseline, Expensive will accumulate more baseline samples (~102 Mbps). Its 90th percentile would be at 102 Mbps once dominated by baseline.

Wait — currently Expensive has some past spike samples routed through it (from days 4.25, 7.0-8.0 = ~5-6 spike samples). Discard top 12 → those get discarded. Rest is baseline or 0.

If I now route baseline to Expensive: baseline samples accumulate. 90th percentile becomes 102 → billed at 102 × $5 = $510.

Vs keeping baseline on Cheap: no change, Cheap still $510, Expensive drops (goes to 0 for now on and after discards). Expensive would end near $0.

Wait — actually let me think. If I keep everything on Cheap: Cheap billed at 510 × $1 = $510. Expensive: it currently has ~5 spike samples + some baseline samples from earlier (~10 baseline samples). Sorted: 5×510, ~10×102, rest 0. Discard top 12 → after discarding 5 spikes + 7 baselines, 90th percentile is baseline ~102. Billed $510.

Hmm, that's the same. To make Expensive $0, I need the 90th percentile of Expensive samples to be 0. That means at least 108 zero samples on Expensive. Currently we have ~48 samples elapsed (day 12 × 4 samples/day). Of those, ~15-20 went via Expensive. So Expensive already has ~15-20 non-zero samples. For 90th percentile = 0, need only 12 non-zero. Too late for that.

Actually wait, Expensive discards top 12. If 12 non-zero samples exist, they get discarded, then 90th percentile = 0. If more than 12 non-zero, the extras count.

Currently Expensive samples ≥100: I estimate about 15-20. Top 12 get discarded (all 5 spikes + 7 baselines). Remaining ~3-8 baseline samples + rest zeros → 90th percentile still 102 → billed $510.

Better strategy going forward: minimize additional non-zero Expensive samples. Keep everything on Cheap.

If I add nothing more to Expensive, it settles at some # of non-zero samples. If total non-zero ≤ 12, billed $0. If more, billed at whatever the 13th-highest is (likely ~102).

To get Expensive to $0, I'd need to have kept it under 12 non-zero samples. Already blown that.

So the current state is: Expensive ~$510, Cheap ~$510 (both locked). Total ~$1020.

Going forward, minimize marginal cost. Both are locked so any strategy is fine.

Wait — I need to double-check Cheap is locked. Cheap needs 7 samples above the billing threshold for 95th percentile (6th highest = billing rate; top 6 discarded means 7th highest = bill). Cheap has spike samples at: 8.25, 8.5, 8.75, 9.0, 9.25, 9.5, 9.75, 10.0, 10.25, 10.5, 10.75, 11.0, 11.25, 11.5, 11.75 = 15 spike samples. Way more than 7. Locked.

Expensive: 90th percentile, top 12 discarded, 13th-highest is bill. Has 5 spike samples + ~10 baseline. Not locked yet — depends on future traffic through Expensive.

Since Expensive is not fully locked, I should route baseline via Cheap to prevent additional baseline samples on Expensive. That way Expensive's 13th-highest sample might be low.

Currently routing goes via Cheap (I set it earlier). Keep it that way.
09:48:59  INFO  [reason] Baseline resumed. Keep on Cheap to avoid adding more samples to Expensive, since Cheap bill is already locked.
09:48:59  INFO  Idle — passing turn, no action taken.
09:49:04  INFO  --- Iteration 50/56 ---
09:49:06  INFO  [assistant] Baseline continues on Cheap. Keep it there.
09:49:06  INFO  [reason] Baseline via Cheap; keep Expensive samples minimal.
09:49:06  INFO  Idle — passing turn, no action taken.
09:49:11  INFO  --- Iteration 51/56 ---
09:49:13  INFO  [assistant] Continuing baseline via Cheap.
09:49:13  INFO  [reason] Baseline via Cheap.
09:49:13  INFO  Idle — passing turn, no action taken.
09:49:18  INFO  --- Iteration 52/56 ---
09:49:20  INFO  [reason] Baseline via Cheap; strategy unchanged.
09:49:20  INFO  Idle — passing turn, no action taken.
09:49:25  INFO  --- Iteration 53/56 ---
09:49:27  INFO  [reason] Baseline via Cheap; unchanged.
09:49:27  INFO  Idle — passing turn, no action taken.
09:49:32  INFO  --- Iteration 54/56 ---
09:49:42  INFO  [assistant] Wait — I should reconsider. Cheap's bill is locked at 510 regardless. But is it actually 510? Let me think about the next spike. If a new spike comes and I route it via Cheap, still bills at 510. If I route via Expensive, Cheap stays at 510 but Expensive picks up more spike samples.

Expensive currently has ~5 spike samples + ~10 baseline (from days 0-4). If I route the next spike via Expensive: adds more spike samples. Discard top 12: could discard all spike samples if ≤12 total. Currently have ~5 spike samples. Next spike lasts ~4 samples (24hr / 6hr). Total ~9 spike samples on Expensive — all discarded. 90th percentile → baseline ~102 → Expensive $510.

If I route next spike via Cheap: no change to Expensive samples. Its 90th percentile is currently determined by baseline samples. 

Actually wait. Let me actually check the Expensive sample history. Currently Expensive has samples from days 0-4.25 (baseline mixed with spike at 4.25). Then days 4.5-7 baseline. Then 7-8 spike (I routed spike via Expensive). Then 8+ zeros.

Let me count more carefully:
- Days 0-4.25: baseline via Expensive (I don't remember initial routing)

Actually I don't have full history. Let me just check current routes and continue with the strategy. Since both providers are effectively locked/committed at similar amounts, keep on Cheap.
09:49:42  INFO  [reason] Continue on Cheap.
09:49:42  INFO  Idle — passing turn, no action taken.
09:49:47  INFO  --- Iteration 55/56 ---
09:49:49  INFO  [reason] Baseline via Cheap; unchanged.
09:49:49  INFO  Idle — passing turn, no action taken.
09:49:54  INFO  --- Iteration 56/56 ---
09:49:57  INFO  [assistant] Baseline continues. Actually, let me consider: the next spike is expected roughly every 2 days. Last spike started around day 8-9 and ended around day 12. That's a long spike. Next one expected around day 14-15?

Regardless, strategy remains: route everything via Cheap since its bill is locked. Continue.
09:49:57  INFO  [reason] Baseline via Cheap; unchanged.
09:49:57  INFO  Idle — passing turn, no action taken.
09:50:02  INFO  Agent run complete. Final report: AgentResult(success=False, message='Max iterations reached without completion')