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/changes/working-copies/.pi-map.index.md

@@ -0,0 +1,23 @@
+# openspec/changes/working-copies (index)
+dir: openspec/changes/working-copies
+
+## role
+Defines a workspace-based architecture to replace direct repository mounting/cloning with persistent, shareable git working copies for tool instances.
+## parent
+index: openspec/changes/.pi-map.index.md
+map: openspec/changes/.pi-map.md
+## children
+-
+## files
+- design.md
+- explore.md
+- proposal.md
+- spec.md
+- tasks.md
+## links
+index: openspec/changes/working-copies/.pi-map.index.md
+map: openspec/changes/working-copies/.pi-map.md
+## workflows
+-
+## dirty
+-

openspec/changes/working-copies/.pi-map.md

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+# openspec/changes/working-copies
+dir: openspec/changes/working-copies
+
+index: openspec/changes/working-copies/.pi-map.index.md
+
+## role
+Defines a workspace-based architecture to replace direct repository mounting/cloning with persistent, shareable git working copies for tool instances.
+## files
+- design.md | Design document for implementing workspace-based tool instances that replace direct repository mounting with isolated git working copies | dep: FastAPI, SQLAlchemy, Alembic, Docker Compose, Git, React/TypeScript, asyncio subprocess
+- explore.md | Design document proposing "Working Copies" (named "Workspace") as persistent writable clones of repositories to replace direct repo mounting/cloning in tool instances | dep: GitRepository, ToolInstance, Project, User, database, compose generation, filesystem mount system
+- proposal.md | Proposes a new "Workspace" entity to replace the confusing mount/clone mode dichotomy for tool instances, enabling persistent writable repository clones that multiple tools can share.
+- spec.md | Technical specification for implementing persistent workspace-based tool instances that replace mount/clone modes with explicit Git repository workspaces | dep: Git, PostgreSQL, REST API, React/TypeScript frontend, Docker containers, Python backend
+- tasks.md | A project task breakdown document defining a phased implementation plan for adding workspace-based tool instances to a full-stack application, including backend foundation, backend integration, frontend core, and frontend integration PRs with detailed tasks, acceptance criteria, and verification steps. | dep: Alembic, FastAPI, SQLAlchemy, React, TypeScript, Git, Docker Compose, pytest, ruff, ESLint, npm
+## arch
+Design-driven development with layered specification documents (exploration → proposal → design → spec → tasks) transitioning from conceptual "Workspace" entity to phased full-stack implementation across backend and frontend.
+## tags
+workspace, tool, instances, git, design, replace, document, repository
+## symbols
+-
+## workflows
+-
+## dirty
+-