From 73afe58cfe05647bb344cb5bb7251fc61afbd67f Mon Sep 17 00:00:00 2001
From: Jeffrey Phillips Freeman <the@jeffreyfreeman.me>
Date: Sun, 5 Apr 2026 01:09:18 -0400
Subject: [PATCH] build: runner for opencode project-builder

---
 scripts/opencode-builder.sh | 146 ++++++++++++++++++++++++++++++++++++
 1 file changed, 146 insertions(+)
 create mode 100755 scripts/opencode-builder.sh

diff --git a/scripts/opencode-builder.sh b/scripts/opencode-builder.sh
new file mode 100755
index 000000000..a8fa11dd0
--- /dev/null
+++ b/scripts/opencode-builder.sh
@@ -0,0 +1,146 @@
+#!/usr/bin/env bash
+#
+# opencode-builder.sh
+#
+# Launches an OpenCode server, creates a session with the product-builder
+# agent, and continuously sends "continue" messages in an infinite loop.
+#
+# Signal handling:
+#   Ctrl+C once  — finishes the in-flight request, then stops the loop
+#   Ctrl+C twice — (within 2 seconds) kills the request and exits immediately
+#
+
+set -uo pipefail
+
+# ── Configuration (override via environment) ──────────────────────────────
+PORT="${OPENCODE_PORT:-4096}"
+HOST="${OPENCODE_HOST:-127.0.0.1}"
+BASE="http://${HOST}:${PORT}"
+AGENT="product-builder"
+PROMPT="Complete the current project's milestones up to and including v3.7.0 to a production ready state"
+HEALTH_TIMEOUT=60  # seconds to wait for the server to become healthy
+
+# ── Internal state ────────────────────────────────────────────────────────
+SERVER_PID=""
+CURL_PID=""
+SESSION_ID=""
+STOP_LOOP=false
+LAST_SIGINT=0
+
+# ── Helpers ───────────────────────────────────────────────────────────────
+die() { printf "ERROR: %s\n" "$*" >&2; exit 1; }
+log() { printf "[%s] %s\n" "$(date +%H:%M:%S)" "$*"; }
+
+cleanup() {
+  if [[ -n "$SERVER_PID" ]] && kill -0 "$SERVER_PID" 2>/dev/null; then
+    log "Stopping opencode server (PID $SERVER_PID)..."
+    kill "$SERVER_PID" 2>/dev/null
+    wait "$SERVER_PID" 2>/dev/null || true
+  fi
+}
+
+handle_sigint() {
+  local now
+  now=$(date +%s)
+
+  # Second Ctrl+C within 2 seconds → force-quit
+  if $STOP_LOOP && (( now - LAST_SIGINT <= 2 )); then
+    printf "\nForce quit!\n"
+    [[ -n "$CURL_PID" ]] && kill "$CURL_PID" 2>/dev/null || true
+    cleanup
+    exit 130
+  fi
+
+  # First Ctrl+C → graceful stop after current request
+  STOP_LOOP=true
+  LAST_SIGINT=$now
+  printf "\nWill stop after the current request completes. Ctrl+C again within 2s to force-quit.\n"
+}
+
+trap handle_sigint INT
+trap cleanup EXIT
+
+# ── Preflight checks ─────────────────────────────────────────────────────
+for cmd in curl jq opencode; do
+  command -v "$cmd" &>/dev/null || die "'$cmd' is required but not found in PATH"
+done
+
+# ── Start the opencode server ─────────────────────────────────────────────
+log "Starting opencode server on ${HOST}:${PORT}..."
+opencode serve --port "$PORT" --hostname "$HOST" &
+SERVER_PID=$!
+
+log "Waiting for server to become healthy (up to ${HEALTH_TIMEOUT}s)..."
+healthy=false
+for (( i = 1; i <= HEALTH_TIMEOUT; i++ )); do
+  if curl -sf "${BASE}/global/health" >/dev/null 2>&1; then
+    healthy=true
+    break
+  fi
+  kill -0 "$SERVER_PID" 2>/dev/null || die "Server process exited unexpectedly"
+  sleep 1
+done
+$healthy || die "Server did not become healthy within ${HEALTH_TIMEOUT}s"
+log "Server is ready."
+
+# ── Create a session ──────────────────────────────────────────────────────
+log "Creating session..."
+SESSION_ID=$(
+  curl -sf -X POST "${BASE}/session" \
+    -H "Content-Type: application/json" \
+    -d '{"title":"product-builder-auto"}' \
+  | jq -r '.id'
+) || die "Failed to create session"
+
+[[ -n "$SESSION_ID" && "$SESSION_ID" != "null" ]] || die "Session ID is empty or null"
+log "Session ID: ${SESSION_ID}"
+
+# ── send_message ──────────────────────────────────────────────────────────
+# Sends a JSON body to POST /session/:id/message and blocks until the LLM
+# responds.  curl is run in a subprocess that ignores SIGINT (SIG_IGN is
+# inherited across exec), so a single Ctrl+C cannot kill the in-flight
+# request.  The parent re-waits whenever its own trap handler interrupts
+# the `wait` builtin.
+send_message() {
+  local body=$1
+
+  ( trap '' INT
+    exec curl -sf -X POST "${BASE}/session/${SESSION_ID}/message" \
+      -H "Content-Type: application/json" \
+      -d "$body" \
+      -o /dev/null
+  ) &
+  CURL_PID=$!
+
+  # Keep waiting until curl actually exits — `wait` can return early when
+  # our SIGINT handler fires, so we loop on kill -0 to re-wait.
+  while kill -0 "$CURL_PID" 2>/dev/null; do
+    wait "$CURL_PID" 2>/dev/null || true
+  done
+  CURL_PID=""
+}
+
+# ── Send the initial prompt ──────────────────────────────────────────────
+INIT_BODY=$(jq -nc --arg a "$AGENT" --arg t "$PROMPT" \
+  '{agent: $a, parts: [{type: "text", text: $t}]}')
+
+log "Sending initial prompt (agent: ${AGENT})..."
+log "Prompt: ${PROMPT}"
+echo ""
+send_message "$INIT_BODY"
+log "Initial prompt complete."
+
+# ── Continue loop ─────────────────────────────────────────────────────────
+CONT_BODY=$(jq -nc '{parts: [{type: "text", text: "continue"}]}')
+N=0
+
+while ! $STOP_LOOP; do
+  N=$((N + 1))
+  log "── continue #${N} ──"
+  send_message "$CONT_BODY"
+  log "continue #${N} complete."
+done
+
+echo ""
+log "Loop stopped. Shutting down."
+exit 0