feat(trellis): enhance bundled skills and workflow integration

- Updated bundled skills documentation to clarify the structure and usage across all platforms, ensuring consistency in skill root paths.
- Introduced a new `inject-spec-context.py` hook for path-scoped spec context injection, improving the relevance of injected specs during file interactions.
- Enhanced existing hooks to support workflow resolution, allowing for dynamic selection of workflows based on task context.
- Added a command to manage workflow selections for active tasks, enabling better task management and workflow adherence.
- Updated configuration options for spec injection, including character limits and refresh windows, to optimize performance and usability.

.codex/hooks/session-start.py

@@ -452,6 +452,25 @@ def _strip_breadcrumb_tag_blocks(content: str) -> str:
     return re.sub(r"\n{3,}", "\n\n", stripped).strip()
 
 
+def _resolve_workflow_md(root: Path, input_data: dict) -> Path:
+    """Resolve the active task's workflow file, falling back to the global one.
+
+    The per-task resolution rule lives in common.workflow_selection inside
+    .trellis/scripts. Older installed projects may not ship that module, and
+    hooks must never crash the session — ANY failure (import error, old
+    scripts tree, resolver bug) falls back to the global workflow.md.
+    """
+    try:
+        scripts_dir = root / ".trellis" / "scripts"
+        if str(scripts_dir) not in sys.path:
+            sys.path.insert(0, str(scripts_dir))
+        from common.workflow_selection import resolve_workflow_md  # type: ignore[import-not-found]
+
+        return resolve_workflow_md(root, input_data, platform="codex")
+    except Exception:
+        return root / ".trellis" / "workflow.md"
+
+
 def _build_workflow_toc(workflow_path: Path) -> str:
     """Inject only the compact Phase Index summary for SessionStart."""
     content = read_file(workflow_path)
@@ -505,7 +524,7 @@ Trellis compact SessionStart context. Use it to orient the session; load details
     output.write("\n</current-state>\n\n")
 
     output.write("<trellis-workflow>\n")
-    output.write(_build_workflow_toc(trellis_dir / "workflow.md"))
+    output.write(_build_workflow_toc(_resolve_workflow_md(project_dir, hook_input)))
     output.write("\n</trellis-workflow>\n\n")
 
     output.write("<guidelines>\n")