conformance: migrate feed onto shared driver (counters, 189/189 parity)

Feed is the canonical MODE=counters shape: each suite runs in a fresh session
with shared preloads and a single feed-test-pass/feed-test-fail pair. Lifted the
old script's inline epoch-2 counter + feed-test helper defs into
lib/feed/test-harness.sx (preloaded last) so the driver can load them before
each suite. conformance.conf + 3-line shim; historical scoreboard schema
preserved. No driver change needed.

Parity verified 189/189 (0 fail), every suite matching baseline.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

lib/feed/conformance.conf

@@ -0,0 +1,82 @@
+# Feed-on-SX conformance config — sourced by lib/guest/conformance.sh.
+#
+# Every feed suite runs in a fresh session with the same preloads and a single
+# pass/fail counter pair — the canonical MODE=counters shape. The counters and
+# the feed-test helper (previously defined inline in the old conformance.sh) are
+# preloaded via lib/feed/test-harness.sx.
+
+LANG_NAME=feed
+MODE=counters
+COUNTERS_PASS=feed-test-pass
+COUNTERS_FAIL=feed-test-fail
+TIMEOUT_PER_SUITE=300
+
+PRELOADS=(
+  spec/stdlib.sx
+  lib/r7rs.sx
+  lib/apl/runtime.sx
+  lib/feed/normalize.sx
+  lib/feed/stream.sx
+  lib/feed/api.sx
+  lib/feed/fanout.sx
+  lib/feed/dedupe.sx
+  lib/feed/aggregate.sx
+  lib/feed/rank.sx
+  lib/feed/acl.sx
+  lib/feed/fed.sx
+  lib/feed/content.sx
+  lib/feed/notify.sx
+  lib/feed/home.sx
+  lib/feed/trending.sx
+  lib/feed/mute.sx
+  lib/feed/page.sx
+  lib/feed/thread.sx
+  lib/feed/test-harness.sx
+)
+
+SUITES=(
+  "basic:lib/feed/tests/basic.sx"
+  "fanout:lib/feed/tests/fanout.sx"
+  "rank:lib/feed/tests/rank.sx"
+  "integration:lib/feed/tests/integration.sx"
+  "content:lib/feed/tests/content.sx"
+  "notify:lib/feed/tests/notify.sx"
+  "home:lib/feed/tests/home.sx"
+  "dedupe:lib/feed/tests/dedupe.sx"
+  "trending:lib/feed/tests/trending.sx"
+  "mute:lib/feed/tests/mute.sx"
+  "page:lib/feed/tests/page.sx"
+  "thread:lib/feed/tests/thread.sx"
+)
+
+# Preserve the historical scoreboard schema so consumers of
+# lib/feed/scoreboard.json keep working.
+emit_scoreboard_json() {
+  local n=${#GC_NAMES[@]} i
+  printf '{\n'
+  printf '  "suites": {\n'
+  for ((i=0; i<n; i++)); do
+    [ "$i" -gt 0 ] && printf ',\n'
+    printf '    "%s": {"pass": %d, "fail": %d}' \
+      "${GC_NAMES[$i]}" "${GC_PASS[$i]}" "${GC_FAIL[$i]}"
+  done
+  printf '\n  },\n'
+  printf '  "total_pass": %d,\n' "$GC_TOTAL_PASS"
+  printf '  "total_fail": %d,\n' "$GC_TOTAL_FAIL"
+  printf '  "total": %d\n' "$GC_TOTAL"
+  printf '}\n'
+}
+
+emit_scoreboard_md() {
+  local n=${#GC_NAMES[@]} i p f
+  printf '# feed Conformance Scoreboard\n\n'
+  printf '_Generated by `lib/feed/conformance.sh`_\n\n'
+  printf '| Suite | Pass | Fail | Total |\n'
+  printf '|-------|-----:|-----:|------:|\n'
+  for ((i=0; i<n; i++)); do
+    p=${GC_PASS[$i]}; f=${GC_FAIL[$i]}
+    printf '| %s | %d | %d | %d |\n' "${GC_NAMES[$i]}" "$p" "$f" "$((p+f))"
+  done
+  printf '| **Total** | **%d** | **%d** | **%d** |\n' \
+    "$GC_TOTAL_PASS" "$GC_TOTAL_FAIL" "$GC_TOTAL"
+}

lib/feed/conformance.sh

@@ -1,125 +1,3 @@
 #!/usr/bin/env bash
-# lib/feed/conformance.sh — run feed test suites, emit scoreboard.json + scoreboard.md.
+# Thin wrapper — see lib/guest/conformance.sh and lib/feed/conformance.conf.
-
+exec bash "$(dirname "$0")/../guest/conformance.sh" "$(dirname "$0")/conformance.conf" "$@"
-set -uo pipefail
-cd "$(git rev-parse --show-toplevel)"
-
-SX_SERVER="${SX_SERVER:-/root/rose-ash/hosts/ocaml/_build/default/bin/sx_server.exe}"
-if [ ! -x "$SX_SERVER" ]; then
-  SX_SERVER="hosts/ocaml/_build/default/bin/sx_server.exe"
-fi
-if [ ! -x "$SX_SERVER" ]; then
-  echo "ERROR: sx_server.exe not found." >&2
-  exit 1
-fi
-
-SUITES=(basic fanout rank integration content notify home dedupe trending mute page thread)
-
-OUT_JSON="lib/feed/scoreboard.json"
-OUT_MD="lib/feed/scoreboard.md"
-
-run_suite() {
-  local suite=$1
-  local file="lib/feed/tests/${suite}.sx"
-  local TMP
-  TMP=$(mktemp)
-  cat > "$TMP" << EPOCHS
-(epoch 1)
-(load "spec/stdlib.sx")
-(load "lib/r7rs.sx")
-(load "lib/apl/runtime.sx")
-(load "lib/feed/normalize.sx")
-(load "lib/feed/stream.sx")
-(load "lib/feed/api.sx")
-(load "lib/feed/fanout.sx")
-(load "lib/feed/dedupe.sx")
-(load "lib/feed/aggregate.sx")
-(load "lib/feed/rank.sx")
-(load "lib/feed/acl.sx")
-(load "lib/feed/fed.sx")
-(load "lib/feed/content.sx")
-(load "lib/feed/notify.sx")
-(load "lib/feed/home.sx")
-(load "lib/feed/trending.sx")
-(load "lib/feed/mute.sx")
-(load "lib/feed/page.sx")
-(load "lib/feed/thread.sx")
-(epoch 2)
-(eval "(define feed-test-pass 0)")
-(eval "(define feed-test-fail 0)")
-(eval "(define feed-test (fn (name got expected) (if (= got expected) (set! feed-test-pass (+ feed-test-pass 1)) (set! feed-test-fail (+ feed-test-fail 1)))))")
-(epoch 3)
-(load "${file}")
-(epoch 4)
-(eval "(list feed-test-pass feed-test-fail)")
-EPOCHS
-
-  local OUTPUT
-  OUTPUT=$(timeout 300 "$SX_SERVER" < "$TMP" 2>/dev/null)
-  rm -f "$TMP"
-
-  local LINE
-  LINE=$(echo "$OUTPUT" | awk '/^\(ok-len 4 / {getline; print; exit}')
-  if [ -z "$LINE" ]; then
-    LINE=$(echo "$OUTPUT" | grep -E '^\(ok 4 \([0-9]+ [0-9]+\)\)' | tail -1 \
-            | sed -E 's/^\(ok 4 //; s/\)$//')
-  fi
-
-  local P F
-  P=$(echo "$LINE" | sed -E 's/^\(([0-9]+) ([0-9]+)\).*/\1/')
-  F=$(echo "$LINE" | sed -E 's/^\(([0-9]+) ([0-9]+)\).*/\2/')
-  P=${P:-0}
-  F=${F:-0}
-  echo "${P} ${F}"
-}
-
-declare -A SUITE_PASS
-declare -A SUITE_FAIL
-TOTAL_PASS=0
-TOTAL_FAIL=0
-
-echo "Running feed conformance suite..." >&2
-for s in "${SUITES[@]}"; do
-  read -r p f < <(run_suite "$s")
-  SUITE_PASS[$s]=$p
-  SUITE_FAIL[$s]=$f
-  TOTAL_PASS=$((TOTAL_PASS + p))
-  TOTAL_FAIL=$((TOTAL_FAIL + f))
-  printf "  %-12s %d/%d\n" "$s" "$p" "$((p+f))" >&2
-done
-
-# scoreboard.json
-{
-  printf '{\n'
-  printf '  "suites": {\n'
-  first=1
-  for s in "${SUITES[@]}"; do
-    if [ $first -eq 0 ]; then printf ',\n'; fi
-    printf '    "%s": {"pass": %d, "fail": %d}' "$s" "${SUITE_PASS[$s]}" "${SUITE_FAIL[$s]}"
-    first=0
-  done
-  printf '\n  },\n'
-  printf '  "total_pass": %d,\n' "$TOTAL_PASS"
-  printf '  "total_fail": %d,\n' "$TOTAL_FAIL"
-  printf '  "total": %d\n' "$((TOTAL_PASS + TOTAL_FAIL))"
-  printf '}\n'
-} > "$OUT_JSON"
-
-# scoreboard.md
-{
-  printf '# feed Conformance Scoreboard\n\n'
-  printf '_Generated by `lib/feed/conformance.sh`_\n\n'
-  printf '| Suite | Pass | Fail | Total |\n'
-  printf '|-------|-----:|-----:|------:|\n'
-  for s in "${SUITES[@]}"; do
-    p=${SUITE_PASS[$s]}
-    f=${SUITE_FAIL[$s]}
-    printf '| %s | %d | %d | %d |\n' "$s" "$p" "$f" "$((p+f))"
-  done
-  printf '| **Total** | **%d** | **%d** | **%d** |\n' "$TOTAL_PASS" "$TOTAL_FAIL" "$((TOTAL_PASS + TOTAL_FAIL))"
-} > "$OUT_MD"
-
-echo "Wrote $OUT_JSON and $OUT_MD" >&2
-echo "Total: $TOTAL_PASS pass, $TOTAL_FAIL fail" >&2
-
-[ "$TOTAL_FAIL" -eq 0 ]

lib/feed/test-harness.sx

@@ -0,0 +1,14 @@
+;; lib/feed/test-harness.sx — counter definitions for the feed conformance
+;; suites, lifted from the inline epoch-2 defs in the old conformance.sh so the
+;; shared driver (MODE=counters) can preload them before each suite.
+
+(define feed-test-pass 0)
+(define feed-test-fail 0)
+(define
+  feed-test
+  (fn
+    (name got expected)
+    (if
+      (= got expected)
+      (set! feed-test-pass (+ feed-test-pass 1))
+      (set! feed-test-fail (+ feed-test-fail 1)))))

plans/agent-briefings/conformance-loop.md

@@ -87,7 +87,7 @@ Blocked with specifics and move to the next candidate next iteration.
 
 - [x] common-lisp — migrated 487/487 (counters; driver extended for per-suite counters+preloads)
 - [x] erlang — migrated 761/761 (dict; pass/count → :failed = count-pass)
-- [ ] feed
+- [x] feed — migrated 189/189 (counters; test-harness.sx preload for counters+helper)
 - [ ] forth
 - [ ] go
 - [ ] js
@@ -100,6 +100,13 @@ Blocked with specifics and move to the next candidate next iteration.
 
 ## Progress log (newest first)
 
+- 2026-06-07 — feed: migrated to `MODE=counters`, 189/189 exact parity (basic 30,
+  fanout 29, rank 24, integration 22, content 15, notify 8, home 6, dedupe 9, trending 11,
+  mute 9, page 14, thread 12). Canonical counters shape: fresh session per suite, shared
+  preloads, single feed-test-pass/feed-test-fail pair. Lifted the old script's inline
+  epoch-2 counter+helper defs into lib/feed/test-harness.sx (preloaded last). No driver
+  change — only conformance.conf + test-harness.sx + shim. Kept historical scoreboard
+  schema (suites{name:{pass,fail}}, total_pass/total_fail/total).
 - 2026-06-07 — erlang: migrated to `MODE=dict`, 761/761 exact parity (tokenize 62,
   parse 52, eval 408, runtime 93, ring 4, ping-pong 4, bank 8, echo 7, fib 8, ffi 37,
   vm 78). Erlang exposes pass + *count* (total) counters, not pass/fail, so each suite's