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).

.opencode/commands/.pi-map.index.md

@@ -0,0 +1,22 @@
+# .opencode/commands (index)
+dir: .opencode/commands
+
+## role
+Defines structured workflow commands and AI assistant stances for an experimental OpenSpec-based development system that guides changes through exploration, proposal, implementation, and archival phases.
+## parent
+index: .opencode/.pi-map.index.md
+map: .opencode/.pi-map.md
+## children
+-
+## files
+- opsx-apply.md
+- opsx-archive.md
+- opsx-explore.md
+- opsx-propose.md
+## links
+index: .opencode/commands/.pi-map.index.md
+map: .opencode/commands/.pi-map.md
+## workflows
+-
+## dirty
+-

.opencode/commands/.pi-map.md

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+# .opencode/commands
+dir: .opencode/commands
+
+index: .opencode/commands/.pi-map.index.md
+
+## role
+Defines structured workflow commands and AI assistant stances for an experimental OpenSpec-based development system that guides changes through exploration, proposal, implementation, and archival phases.
+## files
+- opsx-apply.md | Defines an experimental workflow skill for implementing tasks from an OpenSpec change through a structured, interactive process with CLI integration and progress tracking. | dep: openspec CLI, AskUserQuestion tool, filesystem (for reading context files)
+- opsx-archive.md | Defines a workflow for archiving completed changes in an experimental openspec-based development system | dep: openspec CLI, AskUserQuestion tool, Task tool, Skill tool, filesystem (mkdir, mv), JSON parsing
+- opsx-explore.md | Defines the "explore mode" stance for an AI assistant - a thinking/discovery mode for investigating problems and clarifying requirements without implementing code | dep: OpenSpec system
+- opsx-propose.md | Defines a workflow for proposing new changes in the openspec system by creating a change directory and generating all required artifacts (proposal.md, design.md, tasks.md) in dependency order | dep: openspec CLI, AskUserQuestion tool, TodoWrite tool, JSON parsing
+## arch
+Markdown-based declarative workflow definitions using a command pattern where each `.md` file specifies a distinct operational stance or phase (explore/propose/apply/archive) with embedded metadata, structured steps, and CLI integration points for progressive change lifecycle management.
+## tags
+opsx, defines, workflow, openspec, openspec cli, askuserquestion tool, explore, experimental
+## symbols
+-
+## workflows
+-
+## dirty
+-