Fix josh-proxy rejecting stored filter path with slash

Josh-proxy's parser treats "/" in :+ paths as a filter separator,
so :+.josh-filters/backend fails. Use flat naming at repo root:
.josh-filter-<target>.josh referenced as :+.josh-filter-<target>.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

bin/josh-sync

@@ -431,7 +431,7 @@ cmd_preflight() {
     echo "4. Exclude filter files"
 
     while IFS= read -r target_name; do
-      local filter_file=".josh-filters/${target_name}.josh"
+      local filter_file=".josh-filter-${target_name}.josh"
       if [ -f "$filter_file" ]; then
         if git ls-files --error-unmatch "$filter_file" >/dev/null 2>&1; then
           pass "${filter_file} exists and is tracked"

docs/guide.md

@@ -541,7 +541,7 @@ targets:
 
 ### How it works
 
-When `exclude` is present, josh-sync generates a `.josh-filters/<target>.josh` file containing a [josh stored filter](https://josh-project.github.io/josh/reference/filters.html) with `:exclude` clauses:
+When `exclude` is present, josh-sync generates a `.josh-filter-<target>.josh` file at the monorepo root containing a [josh stored filter](https://josh-project.github.io/josh/reference/filters.html) with `:exclude` clauses:
 
 ```
 :/services/billing:exclude[
@@ -551,6 +551,8 @@ When `exclude` is present, josh-sync generates a `.josh-filters/<target>.josh` f
 ]
 ```
 
+The file is referenced in the josh-proxy URL as `:+.josh-filter-<target>` (flat naming — josh-proxy's parser treats `/` in `:+` paths as a filter separator, so subdirectory paths don't work).
+
 Josh-proxy reads this file from the monorepo and applies the filter at the transport layer. This means:
 - **Forward sync**: the filtered clone already excludes the files
 - **Reverse sync**: pushes through josh also respect the exclusion
@@ -572,11 +574,11 @@ Josh uses `::` patterns inside `:exclude[...]`:
 ### Setup
 
 1. Add `exclude` to the target in `.josh-sync.yml`
-2. Run `josh-sync preflight` — this generates `.josh-filters/<target>.josh`
+2. Run `josh-sync preflight` — this generates `.josh-filter-<target>.josh`
-3. Commit the generated file: `git add .josh-filters/ && git commit`
+3. Commit the generated file: `git add .josh-filter-*.josh && git commit`
 4. Forward sync will now exclude the specified files
 
-If you change the `exclude` list, re-run `preflight` and commit the updated `.josh-filters/` file.
+If you change the `exclude` list, re-run `preflight` and commit the updated `.josh-filter-*.josh` file.
 
 ## Adding a New Target
 

lib/config.sh

@@ -8,9 +8,11 @@
 # Requires: lib/core.sh sourced first, yq and jq on PATH
 
 # ─── Josh Filter File Generation ──────────────────────────────────
-# Generates .josh-filters/<target>.josh for targets with exclude patterns.
+# Generates .josh-filter-<target>.josh for targets with exclude patterns.
 # These files must be committed to the monorepo — josh-proxy reads them
 # from the repo at clone time via the :+ stored filter syntax.
+# Files are at the repo root (flat naming) because josh-proxy's parser
+# treats "/" in :+ paths as a filter separator.
 
 _generate_josh_filters() {
   local has_excludes
@@ -20,8 +22,6 @@ _generate_josh_filters() {
     return
   fi
 
-  mkdir -p .josh-filters
-
   local target_name subfolder exclude_patterns filter_content
   while IFS= read -r target_name; do
     subfolder=$(echo "$JOSH_SYNC_TARGETS" | jq -r --arg n "$target_name" \
@@ -33,7 +33,7 @@ _generate_josh_filters() {
 ${exclude_patterns}
 ]"
 
-    local filter_file=".josh-filters/${target_name}.josh"
+    local filter_file=".josh-filter-${target_name}.josh"
     local existing=""
     if [ -f "$filter_file" ]; then
       existing=$(cat "$filter_file")
@@ -75,9 +75,9 @@ parse_config() {
   export JOSH_SYNC_TARGETS
   JOSH_SYNC_TARGETS=$(echo "$config_json" | jq '[.targets[] | . +
     # Auto-derive josh_filter from subfolder if not set
-    # When exclude patterns are present, use a stored josh filter (:+.josh-filters/<name>)
+    # When exclude patterns are present, use a stored josh filter (:+.josh-filter-<name>)
     (if (.exclude // [] | length) > 0 then
-      {josh_filter: (":+.josh-filters/" + .name)}
+      {josh_filter: (":+.josh-filter-" + .name)}
     elif (.josh_filter // "") == "" then
       {josh_filter: (":/" + .subfolder)}
     else {} end) +
@@ -98,7 +98,7 @@ parse_config() {
     )
   ]')
 
-  # Generate .josh-filters/*.josh for targets with exclude patterns
+  # Generate .josh-filter-*.josh for targets with exclude patterns
   _generate_josh_filters
 
   # Load .env credentials (if present, not required — CI sets these via secrets)

schema/config-schema.json

@@ -75,7 +75,7 @@
             "type": "array",
             "items": { "type": "string" },
             "default": [],
-            "description": "File/directory patterns to exclude from sync via josh :exclude filter. Josh pattern syntax: 'dir/' for directories, '*.ext' for globs, '**/dir/' for nested matches. Generates a .josh-filters/<target>.josh file that must be committed."
+            "description": "File/directory patterns to exclude from sync via josh :exclude filter. Josh pattern syntax: 'dir/' for directories, '*.ext' for globs, '**/dir/' for nested matches. Generates a .josh-filter-<target>.josh file that must be committed."
           }
         }
       }