swarm: durable, inspectable work-tracking journal (worktrack.el)

Single-writer append-only JSONL journal keyed by correlation ID: swarm +
worker + convergence records, reconstructable into a status report. Optional
engram mirror via POST /api/node when ENGRAM_URL is set. Coordinator is the
only writer (workers return structured results), which is race-free and
enforces Swarm containment rule 3 by construction.

Also prototype now_millis/now_ns in el_runtime.h (defined in el_runtime.c but
unprototyped — blocked any El program needing a real ms clock under clang 21).

Test proves durability + inspectability end-to-end.

lang/swarm/build.sh

@@ -0,0 +1,58 @@
+#!/usr/bin/env bash
+# build.sh — compile an El program that uses the swarm capability.
+#
+# Concatenates the El native-concurrency stdlib (thread.el, channel.el) and the
+# swarm capability modules in dependency order, then the user program, compiles
+# with the canonical elc, and links against the shared C runtime.
+#
+# Usage:
+#   swarm/build.sh <program.el> <out-binary>
+#
+# The swarm modules use only el_runtime.c builtins plus thread.el/channel.el,
+# so nothing else needs concatenating (engram_*, json_*, str_*, fs_*, http_*,
+# uuid_v4, now_millis are all C builtins in el_runtime.c).
+
+set -uo pipefail
+cd "$(dirname "$0")/.."          # -> lang/
+LANG_DIR="$(pwd)"
+ELC="${ELC:-${LANG_DIR}/dist/platform/elc}"
+RT="${LANG_DIR}/el-compiler/runtime"
+
+PROG="${1:?usage: build.sh <program.el> <out-binary>}"
+OUT="${2:?usage: build.sh <program.el> <out-binary>}"
+
+# swarm module load order (each may depend on those before it):
+#   worktrack   — durable work-tracking journal (no swarm deps)
+#   containment — the three containment rules (no swarm deps)
+#   primitives  — think/act/attend/intend/learn seam (no swarm deps)
+#   ccr         — per-worker compiled bounded context (depends: primitives)
+#   swarm       — orchestrator: fan-out/converge (depends: all above + thread)
+SWARM_MODULES="
+  swarm/worktrack.el
+  swarm/containment.el
+  swarm/primitives.el
+  swarm/ccr.el
+  swarm/swarm.el
+"
+
+TMP_C="$(mktemp -t swarm_build.XXXXXX).c"
+COMBINED="$(mktemp -t swarm_combined.XXXXXX).el"
+
+cat runtime/thread.el runtime/channel.el $SWARM_MODULES "$PROG" > "$COMBINED"
+
+if ! "$ELC" "$COMBINED" > "$TMP_C" 2>/tmp/swarm.elc.err; then
+    echo "elc FAILED:" >&2
+    sed 's/^/    /' /tmp/swarm.elc.err >&2
+    rm -f "$TMP_C" "$COMBINED"
+    exit 1
+fi
+
+if ! cc -O2 -I "$RT" "$TMP_C" "$RT/el_runtime.c" -lcurl -lpthread -lm -o "$OUT" 2>/tmp/swarm.cc.err; then
+    echo "cc FAILED:" >&2
+    sed 's/^/    /' /tmp/swarm.cc.err >&2
+    rm -f "$TMP_C" "$COMBINED"
+    exit 1
+fi
+
+rm -f "$TMP_C" "$COMBINED"
+echo "built: $OUT"