From abf5b5d5f22b701dace76e6fd7b8fa18f00b53a5 Mon Sep 17 00:00:00 2001
From: Carl Niklas Rydberg <carlniklasrydberg@gmail.com>
Date: Sun, 21 Dec 2025 23:54:42 +0100
Subject: [PATCH] Added the hash_id == 0 guard in the codec and documented the
 FS store digest length constraint in the README.

---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index 022c95f..aac455e 100644
--- a/README.md
+++ b/README.md
@@ -63,6 +63,8 @@ status and refs are printed to stderr.
   `TYPE_TAG_PEL_PROGRAM_DAG_1` (`0x00000101`).
 - `amduat-pel-run` reports `result_ref`, `trace_ref`, and `output_ref[N]`
   when not using `--output-raw`.
+- The filesystem ASL store layout expects digests at least 2 bytes long
+  (two directory levels). Experimental shorter digests need a different store.
 
 ## PEL reference