sessions: add filesystem primitives to open items

Author: Douglas Jones

sessions/2026-05-12.md

@@ -310,3 +310,10 @@ v2-A is done:
   wire format. The Rust binary is now self-contained and fast;
   that's the foundation the protocol work needs.
 
+
+---
+
+## Addendum — open item added at session close
+
+**Filesystem primitives for Codifide** — `fs.list(path)`, `fs.read(path)` as effectful primitives with an `fs.read` effect label. Would let Codifide programs operate on the repo itself — including rewriting `dispatch-check` in Codifide rather than Python. The dispatch-check logic (rule-based classification, cost dispatch, intent annotations) is a natural fit for the language. The missing piece is the filesystem primitive layer. Candidate for v2-B or v3. Needs a proposal.
+