Session paths split by casing on case-insensitive macOS volumes #44014

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1. github-actions

   assigned

   neriousy

   on Aug 21, 2026
2. iBobik commented on Sep 16, 2026

   

   iBobik

   on Sep 16, 2026

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   Related end-user workaround for macOS-hosted Docker devcontainers using virtiofs:

   Until paths are canonicalized centrally, deny known wrong-case paths for every filesystem-capable tool, including glob:

   {
     "permission": {
       "read": { "*": "allow", "app/App.vue": "deny" },
       "edit": { "*": "allow", "app/App.vue": "deny" },
       "glob": { "*": "allow", "*App.vue*": "deny" },
       "bash": { "*": "allow", "*app/App.vue*": "deny" }
     }
   }

   Adapt the path to the canonical casing in your repository. Also instruct agents to use casing exactly as returned by Git.

   If the duplicate entry already exists:

   1. Stop OpenCode.
   2. Normalize the filename from the macOS host.
   3. Remove the affected OpenCode snapshot.
   4. Fully restart Docker Desktop.

   Do not run rm against the wrong-case alias inside the container. On a case-insensitive host, that may delete the real file.
3. iBobik commented on Sep 17, 2026

   

   iBobik

   on Sep 17, 2026

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   It was happening again, this seems solved it:

     "snapshot": false
   
4. opencodejr commented on Oct 28, 2026

   

   opencodejrBot

   on Oct 28, 2026

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   Thanks for the report, I was able to reproduce this.

   I didn't have macOS, so I used a case-insensitive FAT volume on Linux as a stand-in for case-insensitive APFS:

   1. Created /mnt/ci44014/Academic/Project.
   2. Created a session through POST /api/session with location.directory set to /mnt/ci44014/academic/project. It is stored with that exact casing.
   3. GET /api/session?directory=/mnt/ci44014/academic/project returned the session, but GET /api/session?directory=/mnt/ci44014/Academic/Project returned {"data":[]}.

   This happens on 2.2.0 and still happens on the latest dev (a882cf98a). The script below reproduces it.

   Related issues, most closely related first:

   • Session list misses sessions when directory case differs on Windows #49556: the same exact-match directory filter in the session list, on Windows
   • project: Windows path case sensitivity silently splits project identity (empty session list, duplicated MCP/plugin init) #52501: on Windows, opening a project with different path casing creates a second, empty project

   Reproduction script (repro.sh)

   #!/usr/bin/env bash
   # Reproduces #44014 on Linux using a case-insensitive vfat loop mount
   # (stand-in for case-insensitive APFS). Needs root (mount) + dosfstools + curl.
   # OC: command to run opencode (default: opencode from PATH).
   set -euo pipefail
   OC=${OC:-opencode}
   PORT=${PORT:-4599}
   export OPENCODE_SERVER_PASSWORD=repro
   WORK=$(mktemp -d /tmp/oc44014.XXXX)
   export HOME=$WORK/home XDG_DATA_HOME=$WORK/data XDG_CONFIG_HOME=$WORK/config XDG_STATE_HOME=$WORK/state XDG_CACHE_HOME=$WORK/cache
   mkdir -p "$HOME"
   
   MNT=/mnt/ci44014
   if ! mountpoint -q $MNT; then
     dd if=/dev/zero of=$WORK/fat.img bs=1M count=64 status=none
     mkfs.vfat $WORK/fat.img >/dev/null
     mkdir -p $MNT && mount -o loop $WORK/fat.img $MNT
   fi
   mkdir -p $MNT/Academic/Project
   echo "same inode for both spellings: $(stat -c %i $MNT/Academic/Project) $(stat -c %i $MNT/academic/project)"
   
   $OC --version
   cd $WORK
   setsid $OC serve --hostname 127.0.0.1 --port $PORT >$WORK/serve.log 2>&1 &
   SRV=$!
   trap 'kill -- -$SRV 2>/dev/null || true' EXIT
   for i in $(seq 1 60); do curl -sf -u opencode:repro "http://127.0.0.1:$PORT/api/session" >/dev/null 2>&1 && break; sleep 1; done
   URL=http://127.0.0.1:$PORT; AUTH=(-u opencode:repro)
   
   echo "== create session with $MNT/academic/project"
   curl -s "${AUTH[@]}" -X POST "$URL/api/session" -H 'content-type: application/json' \
     -d "{\"location\":{\"directory\":\"$MNT/academic/project\"},\"title\":\"lower\"}" | head -c 400
   echo
   for d in "$MNT/academic/project" "$MNT/Academic/Project"; do
     echo "== list sessions ?directory=$d"
     curl -s "${AUTH[@]}" -G "$URL/api/session" --data-urlencode "directory=$d" | head -c 200
     echo
   done

   Run it: bash repro.sh

   👍React with 👍1Reacted by Honza Pobořil
5. opencodejr

   added

   reproduced

   on Oct 28, 2026