v0.6.2: fix Cygwin argv overflow when passing TOOLS_JSON to jq

Bryan hit this on every chat turn from MobaXterm:
  jq: Argument list too long
  error: OAuth token unavailable; ...
  error: empty response from API
  warn: turn ended with error

Root cause: agent_turn was building the API payload with
  jq -n ... --argjson tools "$TOOLS_JSON" ...
which puts all 21KB of tool-definition JSON on the jq command line as
argv. Cygwin/Windows argv limit is ~32KB total — combined with the other
args this exceeded it and jq failed with E2BIG. Linux/macOS have a much
larger limit (256KB+) so this never showed in local testing.

The downstream errors were cascade noise: jq fails to write payload →
call_api runs with empty/partial payload → various error paths fire.

Fix: write TOOLS_JSON to a tempfile once per agent_turn and reference
it via --slurpfile (same pattern already used for $MESSAGES_FILE).
Tempfile is cleaned up at every return path.

Verified locally — payload now builds cleanly with no argv warnings.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

VERSION

@@ -1 +1 @@
-0.6.1
+0.6.2

larry.sh

@@ -36,7 +36,7 @@ set -o pipefail
 # ─────────────────────────────────────────────────────────────────────────────
 # Config
 # ─────────────────────────────────────────────────────────────────────────────
-LARRY_VERSION="0.6.1"
+LARRY_VERSION="0.6.2"
 LARRY_HOME="${LARRY_HOME:-$HOME/.larry}"
 LARRY_BASE_URL="${LARRY_BASE_URL:-https://raw.githubusercontent.com/bojj27/cloverleaf-larry/main}"
 LARRY_UPDATE_URL="${LARRY_UPDATE_URL:-${LARRY_BASE_URL}/larry.sh}"
@@ -1040,6 +1040,11 @@ build_system_prompt() {
 # ─────────────────────────────────────────────────────────────────────────────
 agent_turn() {
   local system_prompt="$1"
+  # Write the TOOLS_JSON to a file ONCE per agent_turn rather than passing it
+  # via --argjson (which puts the full 21KB blob on the jq command line and
+  # blows up Cygwin/Windows argv limits with E2BIG / "Argument list too long").
+  local tools_file; tools_file=$(mktemp)
+  printf '%s' "$TOOLS_JSON" > "$tools_file"
   while true; do
     local payload_file; payload_file=$(mktemp)
     jq -n \
@@ -1047,18 +1052,19 @@ agent_turn() {
       --argjson max_tokens "$LARRY_MAX_TOKENS" \
       --arg system "$system_prompt" \
       --slurpfile messages "$MESSAGES_FILE" \
-      --argjson tools "$TOOLS_JSON" \
+      --slurpfile tools "$tools_file" \
-      '{model:$model, max_tokens:$max_tokens, system:$system, messages:$messages[0], tools:$tools}' \
+      '{model:$model, max_tokens:$max_tokens, system:$system, messages:$messages[0], tools:$tools[0]}' \
       > "$payload_file"
 
     local resp; resp=$(call_api "$payload_file")
     rm -f "$payload_file"
 
-    if [ -z "$resp" ]; then err "empty response from API (timeout or network?)"; return 1; fi
+    if [ -z "$resp" ]; then err "empty response from API (timeout or network?)"; rm -f "$tools_file"; return 1; fi
 
     local err_type; err_type=$(printf '%s' "$resp" | jq -r '.error.type // empty' 2>/dev/null)
     if [ -n "$err_type" ]; then
       err "API error: $err_type — $(printf '%s' "$resp" | jq -r '.error.message // "no message"')"
+      rm -f "$tools_file"
       return 1
     fi
 
@@ -1101,6 +1107,7 @@ agent_turn() {
 
     add_user_tool_results "$results"
   done
+  rm -f "$tools_file"
 }
 
 # ─────────────────────────────────────────────────────────────────────────────