punkcheck 0.3.1: install -overwrite/-source-checksum/-punkcheck-folder -choiceprefix 0 PUNKARGS fix

install documented -choices on -overwrite, -source-checksum and
-punkcheck-folder with -choiceprefix defaulting to true, but the manual
dict merge parser validates option names only and never normalizes choice
values. PUNKARGS now declares -choiceprefix 0 so documented behaviour
matches the implementation (exact match required).

Assisted-by: harness=opencode; primary-model=openrouter/z-ai/glm-5.2; api-location=openrouter.ai

src/modules/punkcheck-999999.0a1.0.tm

@@ -1359,6 +1359,7 @@ namespace eval punkcheck {
             -overwrite      -default no-targets\
                 -choices {no-targets newer-targets older-targets all-targets installedsourcechanged-targets synced-targets}\
                 -choicecolumns 1\
+                -choiceprefix 0\
                 -choicelabels {
                     no-targets      "only copy files that are missing at the target"
                     newer-targets   "copy files with older source timestamp over newer
@@ -1371,14 +1372,14 @@ namespace eval punkcheck {
                     synced-targets  "copy if the target doesn't exist or the source changed
                 and the target cksum is the same as the last INSTALL-RECORD -targets_cksums entry"
                 }
-            -source-checksum  -default comparestore -choicecolumns 3 -choices {compare store comparestore false true} -help\
+            -source-checksum  -default comparestore -choicecolumns 3 -choices {compare store comparestore false true} -choiceprefix 0 -help\
                 "Checksum behavior for source files.
                   compare:    checksum and compare against last record, but do not store.
                   store:      checksum and store, but do not compare against last record.
                   comparestore: checksum, compare against last record, and store.
                   false:      do not checksum (not recommended - changes cannot be detected).
                   true:       same as comparestore."
-            -punkcheck-folder -default target -choices {target source project} -choicerestricted 0 -help\
+            -punkcheck-folder -default target -choices {target source project} -choicerestricted 0 -choiceprefix 0 -help\
                 "The location of the .punkcheck file to track installations and checksums.
                   The default value 'target' is generally recommended.
                   Can also be an absolute path to a folder."

src/modules/punkcheck-buildversion.txt

@@ -1,6 +1,7 @@
-0.3.0
+0.3.1
 #First line must be a semantic version number
 #all other lines are ignored.
+#0.3.1 - PUNKARGS fix: install -overwrite, -source-checksum and -punkcheck-folder now declare -choiceprefix 0 so documented behaviour matches the manual parser (exact match required, no prefix matching)
 #0.3.0 - added installsource_add_virtual proc + installevent targetset_addsource_virtual method: 'virtual' named-value SOURCE records (-type virtual -path virtual:<id> -value <v>) compared by value, for e.g recording resolved module build versions on install/delete records
 #0.2.0 - merged -exclude-dirsegments + -antiglob_paths into unified -exclude-paths (backward-compat aliases retained)
 #0.2.0 - renamed all underscore flags to hyphenated forms (-max-depth, -source-checksum, -punkcheck-folder, etc.) with backward-compat alias pre-processing