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HTTPd M1: static serve without index cache + config proxy loop

Summary

Epoll static serving works when index.html is missing or too large for the cache; TOML config with upstream peers starts the Li proxy epoll loop instead of the static blocking path; StringView extern returns map to i8* for E0360.

Agent continuation

  1. Read runtime/li_rt_net.c (httpd_prepare_root_i, httpd_try_drain_once, httpd_serve_conn_epoll), packages/li-net-httpd/src/lib.li (httpd_run_from_runtime_config).
  2. Run LI_REPO_ROOT=$PWD ./li-tests/run_httpd_config.sh and tier-5 static_large with LI_HTTPD_BIN=build/li-httpd.
  3. Then land M1 exploits (m1-wave4) and li-log; rebase stacked PRs #87 / #84 if still open.
  4. Blocked on full Lean discharge on server modules (P0-lean); M1.5 SSE/TLS not started.

Changed

Area Paths
Static recv runtime/li_rt_net.c — serve on g_doc_root_len; optional index cache
Config proxy packages/li-net-httpd/src/lib.li — httpd_upstream_proxy_epoll_loop from .conf
Proxy detect httpd_proxy_configured_i — peers or g_proxy_port
ABI compiler/mir/lower.cpp — StringView extern return width
Tracker docs/superpowers/plans/2026-05-14-li-master-plan.md Phase H rows

Not changed

  • M1.5 SSE, TLS ACME, leak_censor.
  • li-log package / rotation.
  • Exploit tiers A+B ship gate scripts.
  • Li async reactor (still C epoll).

Breaking

N/A

Security

N/A — same path traversal checks in httpd_try_drain_once.

Performance

N/A — enables static_large when index cache is absent; no bench threshold change.

Downstream

  • benchmarks — refresh matrix after merge; static_large should report RPS not wrk_parse_fail_li.