Initial commit: Odin editor client + Kotlin daemon prototype

Native SDL3 editor written in Odin with a piece-table buffer core,
backed by a Kotlin/JVM daemon speaking newline-delimited JSON over
localhost TCP for Gradle import, Kotlin/Java diagnostics, and
heuristic completion/hover/definition/references/rename.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

scripts/autopilot-opencode.sh

@@ -0,0 +1,73 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Repeatedly asks opencode to continue autonomous project work.
+#
+# Configuration:
+#   OPENCODE_BIN       Command to run. Default: opencode
+#   OPENCODE_PROJECT   Project/workspace path. Default: current directory
+#   OPENCODE_SESSION   Session id to continue. If unset, uses --continue
+#   OPENCODE_MODEL     Optional model, e.g. openai/gpt-5.5
+#   OPENCODE_AGENT     Optional agent name
+#   OPENCODE_EXTRA_ARGS Optional extra args inserted before the message, shell-split
+#   AUTOPILOT_MESSAGE  Message sent each iteration. Default: keep working prompt below
+#   AUTOPILOT_INTERVAL Seconds to sleep between successful iterations. Default: 10
+#   AUTOPILOT_MAX_RUNS Max iterations. 0 means forever. Default: 0
+#   AUTOPILOT_STOP_FILE Stop when this file exists. Default: .opencode-autopilot-stop
+#   AUTOPILOT_ALLOW_PERMISSIONS Automatically approve tool permissions. Default: 1
+
+OPENCODE_BIN=${OPENCODE_BIN:-opencode}
+OPENCODE_PROJECT=${OPENCODE_PROJECT:-$(pwd)}
+AUTOPILOT_INTERVAL=${AUTOPILOT_INTERVAL:-10}
+AUTOPILOT_MAX_RUNS=${AUTOPILOT_MAX_RUNS:-0}
+AUTOPILOT_STOP_FILE=${AUTOPILOT_STOP_FILE:-.opencode-autopilot-stop}
+AUTOPILOT_ALLOW_PERMISSIONS=${AUTOPILOT_ALLOW_PERMISSIONS:-1}
+AUTOPILOT_MESSAGE=${AUTOPILOT_MESSAGE:-Continue working autonomously in this configured session. Keep working on the current task list. If every task is finished, inspect the project, decide the next highest-value tasks, add or update the task list, implement them, verify them, and continue until blocked. Do not stop just because one task is complete; stop only for a real blocker that requires user input.}
+
+run_count=0
+
+while true; do
+  if [[ -e "$AUTOPILOT_STOP_FILE" ]]; then
+    printf 'stop file exists: %s\n' "$AUTOPILOT_STOP_FILE"
+    exit 0
+  fi
+
+  if [[ "$AUTOPILOT_MAX_RUNS" != "0" && "$run_count" -ge "$AUTOPILOT_MAX_RUNS" ]]; then
+    printf 'reached AUTOPILOT_MAX_RUNS=%s\n' "$AUTOPILOT_MAX_RUNS"
+    exit 0
+  fi
+
+  args=(run --dir "$OPENCODE_PROJECT")
+
+  if [[ "$AUTOPILOT_ALLOW_PERMISSIONS" != "0" ]]; then
+    args+=(--dangerously-skip-permissions)
+  fi
+
+  if [[ -n "${OPENCODE_SESSION:-}" ]]; then
+    args+=(--session "$OPENCODE_SESSION")
+  else
+    args+=(--continue)
+  fi
+
+  if [[ -n "${OPENCODE_MODEL:-}" ]]; then
+    args+=(--model "$OPENCODE_MODEL")
+  fi
+
+  if [[ -n "${OPENCODE_AGENT:-}" ]]; then
+    args+=(--agent "$OPENCODE_AGENT")
+  fi
+
+  if [[ -n "${OPENCODE_EXTRA_ARGS:-}" ]]; then
+    # shellcheck disable=SC2206
+    extra_args=($OPENCODE_EXTRA_ARGS)
+    args+=("${extra_args[@]}")
+  fi
+
+  args+=("$AUTOPILOT_MESSAGE")
+
+  run_count=$((run_count + 1))
+  printf '[%s] autopilot iteration %d\n' "$(date -Is)" "$run_count"
+  "$OPENCODE_BIN" "${args[@]}"
+
+  sleep "$AUTOPILOT_INTERVAL"
+done

scripts/compile-shaders.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+SRC="$ROOT/client/odin/shaders"
+OUT="$SRC/compiled"
+
+if ! command -v glslc >/dev/null 2>&1; then
+  printf 'error: glslc not found. Install shaderc/glslc. On Fedora: sudo dnf install glslc\n' >&2
+  exit 1
+fi
+
+mkdir -p "$OUT"
+
+glslc -fshader-stage=vert "$SRC/rect.vert.glsl" -o "$OUT/rect.vert.spv"
+glslc -fshader-stage=frag "$SRC/rect.frag.glsl" -o "$OUT/rect.frag.spv"
+glslc -fshader-stage=vert "$SRC/text.vert.glsl" -o "$OUT/text.vert.spv"
+glslc -fshader-stage=frag "$SRC/text.frag.glsl" -o "$OUT/text.frag.spv"
+
+printf 'compiled SDL3 GPU shaders to %s\n' "$OUT"