Clean up samples index links (duplicates/broken)

Author: DavidQ

docs/dev/CODEX_COMMANDS.md

@@ -2,8 +2,7 @@ MODEL: GPT-5.4-codex
 REASONING: high
 
 COMMAND:
-Execute docs/pr/BUILD_PR_SAMPLES_73_PHASE_GROUPING_INDEX_ONLY_FIXED.md exactly.
+Execute docs/pr/BUILD_PR_SAMPLES_74_INDEX_LINK_VALIDATION_CLEANUP.md exactly.
 Modify only samples/index.html.
-Do not create or move any files or directories.
 Package to:
-<project folder>/tmp/BUILD_PR_SAMPLES_73_PHASE_GROUPING_INDEX_ONLY_FIXED_delta.zip
+<project folder>/tmp/BUILD_PR_SAMPLES_74_INDEX_LINK_VALIDATION_CLEANUP_delta.zip

docs/dev/COMMIT_COMMENT.txt

@@ -1 +1 @@
-Group existing sample links in samples/index.html by phase using current paths only.
+Clean up samples index links (duplicates/broken)

docs/dev/NEXT_COMMAND.txt

@@ -1 +1 @@
-Next: inspect exact sample file paths before issuing any folder-alignment BUILD.
+Next: identify exact sample files for phase-folder normalization

docs/dev/reports/change_summary.txt

@@ -1,3 +1 @@
-- replaced invalid folder-alignment BUILD with an index-only grouping BUILD
-- narrowed scope to existing file and existing resolving links only
-- removed all implied directory creation/move assumptions
+index cleanup

docs/dev/reports/file_tree.txt

@@ -1,8 +1 @@
-docs/pr/BUILD_PR_SAMPLES_73_PHASE_GROUPING_INDEX_ONLY_FIXED.md
-docs/dev/codex_commands.md
-docs/dev/commit_comment.txt
-docs/dev/next_command.txt
-docs/dev/reports/file_tree.txt
-docs/dev/reports/change_summary.txt
-docs/dev/reports/validation_checklist.txt
 samples/index.html

docs/dev/reports/validation_checklist.txt

@@ -1,5 +1 @@
-- single PR purpose only
-- exact target file only
-- no file or directory creation
-- no file moves or renames
-- all links still resolve
+links resolve; no duplicates

docs/pr/BUILD_PR_SAMPLES_74_INDEX_LINK_VALIDATION_CLEANUP.md

@@ -0,0 +1,23 @@
+# BUILD PR — Samples Index Link Validation Cleanup
+
+## Purpose
+Perform a safe cleanup of samples/index.html by removing or correcting any broken or duplicate links.
+
+## Exact Target Files
+- samples/index.html
+
+## Required Code Changes
+- remove duplicate links if present
+- remove or fix any links that do not resolve
+- do not add new links
+- do not change structure beyond minimal cleanup
+
+## Constraints
+- exact file only
+- no file creation
+- no file moves
+- no refactor
+
+## Acceptance Criteria
+- all links in index resolve
+- no duplicates remain