chore: track all project map and index files

Add generated .pi-map.md and .pi-map.index.md files across the repository
so the project navigation maps are shared and versioned. These artifacts
are maintained by project_map_init/patch/validate and must be kept in
sync with source edits.

Note: .cache/ remains ignored (added in previous commit).

openspec/specs/tool-terminal-startup-command/.pi-map.index.md

@@ -0,0 +1,19 @@
+# openspec/specs/tool-terminal-startup-command (index)
+dir: openspec/specs/tool-terminal-startup-command
+
+## role
+Defines requirements for pre-shell initialization commands in terminal tool configurations.
+## parent
+index: openspec/specs/.pi-map.index.md
+map: openspec/specs/.pi-map.md
+## children
+-
+## files
+- spec.md
+## links
+index: openspec/specs/tool-terminal-startup-command/.pi-map.index.md
+map: openspec/specs/tool-terminal-startup-command/.pi-map.md
+## workflows
+-
+## dirty
+-

openspec/specs/tool-terminal-startup-command/.pi-map.md

@@ -0,0 +1,19 @@
+# openspec/specs/tool-terminal-startup-command
+dir: openspec/specs/tool-terminal-startup-command
+
+index: openspec/specs/tool-terminal-startup-command/.pi-map.index.md
+
+## role
+Defines requirements for pre-shell initialization commands in terminal tool configurations.
+## files
+- spec.md | Specifies requirements for adding an optional `startup_command` field to terminal tool types that executes before the interactive shell in new terminal sessions. | dep: tool-types-definition, tool-terminal
+## arch
+Specification-driven design using markdown-based requirements documents with field extension patterns for tool type schemas.
+## tags
+terminal, tool, types, spec, specifies, requirements, adding, optional
+## symbols
+-
+## workflows
+-
+## dirty
+-