Add addUserText helper; update all call sites

Conversation.addUserMessage now takes a []ContentBlock (symmetric with
addAssistantMessage). Introduce a thin addUserText wrapper in agent.zig
for the plain-text case and update every call site in agent.zig and
anthropic_messages_json.zig accordingly.

1 files changed, 63 insertions, 0 deletions

diff --git a/libpanto-lua/libpanto-lua-0.0.0-1.rockspec b/libpanto-lua/libpanto-lua-0.0.0-1.rockspec
new file mode 100644
index 0000000..c14353f
--- /dev/null
+++ b/libpanto-lua/libpanto-lua-0.0.0-1.rockspec
@@ -0,0 +1,63 @@
+-- LuaRocks rockspec for `libpanto-lua`: the native Lua 5.4 binding for
+-- libpanto, built in pure Zig.
+--
+-- Distribution model (see docs/libpanto-bindings.md): this is the *source*
+-- rock — universal, buildable on any OS/arch that has a Zig toolchain.
+-- LuaRocks prefers a matching pre-built `.PLATFORM.rock` when one is
+-- published and falls back to building this source rock otherwise (the
+-- pip "wheel-or-sdist" model). Pre-built binary rocks per platform are a
+-- later step; no rockspec change is needed to add them.
+--
+-- Build: `build.type = "command"` shells out to `zig build` (so the build
+-- dependency is Zig, declared informally below since LuaRocks can't fetch
+-- a compiler), then stages the emitted `panto.so` into `$(LIBDIR)` as the
+-- bare module name `panto` — discovered by `require('panto')` on cpath.
+
+rockspec_format = "3.0"
+package = "libpanto-lua"
+version = "0.0.0-1"
+
+source = {
+   url = "git+https://github.com/earendil-works/pantograph.git",
+   -- The module lives in the `libpanto-lua/` subdirectory of the repo.
+   dir = "pantograph/libpanto-lua",
+}
+
+description = {
+   summary = "Native Lua 5.4 bindings for libpanto (pure Zig).",
+   detailed = [[
+      A loadable Lua 5.4 C-module exposing libpanto's agent + pull-stream
+      API. require('panto') yields panto.agent{...}; an Agent runs turns
+      that stream Events, registers Lua tool handlers (driven by libuv via
+      luv), swaps provider config, manages the system prompt, and compacts.
+      Implemented entirely in Zig (no C translation units); the .so is
+      emitted by `zig build`.
+   ]],
+   homepage = "https://github.com/earendil-works/pantograph",
+   license = "MIT",
+   labels = { "ai", "llm", "agent", "libpanto" },
+}
+
+-- Lua 5.4 only (Lua has no stable ABI across minor versions; a module
+-- built for 5.4 will not load in 5.3 or 5.5). `luv` is required for tool
+-- dispatch: tool handlers run as coroutines driven by `uv.run`.
+dependencies = {
+   "lua >= 5.4, < 5.5",
+   "luv",
+}
+
+-- Zig is required at build time. LuaRocks has no notion of a Zig toolchain
+-- dependency, so this is enforced by the build_command failing loudly if
+-- `zig` is absent rather than by a declared dependency.
+
+build = {
+   type = "command",
+   -- Build the shared object. `zig build` reads ./build.zig and emits
+   -- zig-out/lib/panto.so (see build.zig: the install step renames the
+   -- artifact to the bare `panto.so` a Lua C-module requires).
+   build_command = "zig build -Doptimize=ReleaseFast",
+   -- Stage the emitted module into LuaRocks' library dir under the bare
+   -- name `panto` so `require('panto')` resolves it on cpath. $(LIBDIR)
+   -- is substituted by LuaRocks at install time.
+   install_command = "cp zig-out/lib/panto.so $(LIBDIR)/panto.so",
+}