From 0ced30825dc51ef4a0ed59b37950b5bf433a77c3 Mon Sep 17 00:00:00 2001
From: Levi Neely <lkn@darkstar.example.net>
Date: Sun, 15 Mar 2026 14:13:11 +0100
Subject: [PATCH] claim_bead: verify claim succeeded by reading back assignee

9p write exits 0 even when the server returns Rerror on Tclunk, so
the previous exit-code check never detected failed claims. Read back
the bead's assignee after writing and fail if it doesn't match.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 mcptools/claim_bead.sh | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/mcptools/claim_bead.sh b/mcptools/claim_bead.sh
index 2d67291..71d0aac 100755
--- a/mcptools/claim_bead.sh
+++ b/mcptools/claim_bead.sh
@@ -26,8 +26,11 @@ if [ -z "${AGENT_ID:-}" ]; then
     exit 1
 fi
 
-if ! result=$(echo "claim $BEAD_ID $AGENT_ID" | 9p write anvillm/beads/$MOUNT/ctl 2>&1); then
-    echo "error: claim failed: $result" >&2
+echo "claim $BEAD_ID $AGENT_ID" | 9p write anvillm/beads/$MOUNT/ctl
+
+assignee=$(9p read anvillm/beads/$MOUNT/$BEAD_ID/json 2>/dev/null | jq -r '.assignee // empty')
+if [ "$assignee" != "$AGENT_ID" ]; then
+    echo "error: claim failed (bead is assigned to '$assignee')" >&2
     exit 1
 fi
 echo "claimed $BEAD_ID → $AGENT_ID"