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coder/.github
Spike Curtis 5745ff7912 test: log DERP debug in CI (#23041)
related to: https://github.com/coder/internal/issues/1387

Sometimes our tests using DERP flake like the above, but we have no information at the DERP layer about why. This enables verbose DERP logging in CI.

Logs are kinda spammy, but most tests do not force DERP and so only use it for discovery (disco).

A test like TestWorkspaceAgentListeningPorts/OK_BlockDirect drops around 50 DERP packets e.g.

```
    t.go:111: 2026-03-13 15:20:52.201 [debu]  agent.net.tailnet.net.wgengine: magicsock: got derp-999 packet: "\x04\x00\x00\x00C}\xe0\xb9\x00\x00\x00\x00\x00\x00\x00\x00}\xae;l\xd9Hk8\xa8l\x1cK\xedO{狦)\x18NIw\xc4k\xd2-\x19\xbf\xfb\xdd\x17\xa9b\xac\xfd#\xf7\xcaC\xbe\vq(u=\xa7\x16\xe9\x9aLjS\x1fXL\x19y\xf4\x1dE%\xb3\xff\x9d:8\xa9\x95X\xfe\xf8\x95\x7f\x9dv$\f\xf4\xbe"
    t.go:111: 2026-03-13 15:20:52.201 [debu]  agent.net.tailnet.net.wgengine: magicsock: got derp-999 packet: "\x04\x00\x00\x00C}\xe0\xb9\x01\x00\x00\x00\x00\x00\x00\x00\x05x\xb6RD;\xb4\x80\xb6\x0f\xf6KŠc\xfb1\xbd\x06\xb70K3\x97`\x8d\xd2\x14\xed\xc5\xd6\xc6\xcaV\xbf\x878\xb2Ƥ\xf0\xd5\xf7\xc0\x1b\x9f\x04Y\x03\x17\xd4\x06\xee\xb2G\r){\x9f\xde\xe0(\xb5N\xfejR_\xf6q\xa4\xfaT\x9a\xd8\xcbk\xba\x16K"
    t.go:111: 2026-03-13 15:20:52.201 [debu]  agent.net.tailnet.net.wgengine: magicsock: got derp-999 packet: "\x04\x00\x00\x00C}\xe0\xb9\x02\x00\x00\x00\x00\x00\x00\x00\x1e\x93a\x15\xfev\x81'\xa9?\xe8nR\xce<\x91\x86\xcau@\xb9\xcfɩ\xef\xd1眓\x95\xf3*X^7\x99\x88\xb0|\x8cS\xe4@[\x16\xda\xca\xd4\xd9\x1dP\xd0\xfe\xd9r\x8c\xfcp~dP\xfaK\xe0\xf9y\xb2\x11\x15\xfe\xdcx鷽\xdeF\xf7\x92\xe8"

```
2026-03-13 12:50:39 -04:00
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