docs

* note on the claude subscription provider plan that this is an
  extension, not panto core, not to be published
* archive that old "overview" doc
* new doc: pluggable session stores
* new doc: libpanto C wrappers, FFI wrappers for python and go

1 files changed, 3 insertions, 1 deletions

diff --git a/docs/anthropic-subscription-provider.md b/docs/anthropic-subscription-provider.md
index c6d44eb..941e33d 100644
--- a/docs/anthropic-subscription-provider.md
+++ b/docs/anthropic-subscription-provider.md
@@ -1,12 +1,14 @@
 # Anthropic subscription provider sketch
 
+**This is implemented as a Lua extension, not built into pantograph's core.** Everything described here — the provider, PTY management, MCP tool bridge, and hook harness — lives in a Lua extension that pantograph loads. Pantograph's core has no knowledge of Claude Code, subscription auth, or any of the mechanics below. The extension uses only the public extension/provider API surface that any third-party extension could use.
+
 Goal: expose a pantograph provider backed by an interactive Claude Code subscription session, without using Anthropic API keys, `claude -p`, or Agent SDK metering.
 
 ## Core idea
 
 Run `claude` as an interactive TUI process under a PTY, but make it behave like a minimal local model provider:
 
-- pantograph owns the outer UX and provider API.
+- pantograph (via the Lua extension) owns the outer UX and provider API.
 - Claude Code provides subscription-backed model turns.
 - Claude built-in tools are disabled.
 - pantograph tools are exposed to Claude Code through MCP.