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/proposals/.pi-map.index.md

@@ -0,0 +1,23 @@
+# openspec/proposals (index)
+dir: openspec/proposals
+
+## role
+Contains architectural design proposals for extending and improving the OpenSpec project's container tooling, configuration, and terminal performance capabilities.
+## parent
+index: openspec/.pi-map.index.md
+map: openspec/.pi-map.md
+## children
+-
+## files
+- config-profile-multi-repo-mounts.md
+- home-path-expansion.md
+- mount-specificity-ordering.md
+- streamline-tool-container-definitions.md
+- terminal-responsiveness.md
+## links
+index: openspec/proposals/.pi-map.index.md
+map: openspec/proposals/.pi-map.md
+## workflows
+-
+## dirty
+-

openspec/proposals/.pi-map.md

@@ -0,0 +1,23 @@
+# openspec/proposals
+dir: openspec/proposals
+
+index: openspec/proposals/.pi-map.index.md
+
+## role
+Contains architectural design proposals for extending and improving the OpenSpec project's container tooling, configuration, and terminal performance capabilities.
+## files
+- config-profile-multi-repo-mounts.md | Proposes a backward-compatible extension to Config Profiles' git_mounts to support multiple source/target mappings per repository clone, enabling efficient monorepo directory mounting.
+- home-path-expansion.md | Proposes expanding `~` and `$HOME` in container mount target paths to the appropriate home directory based on tool manifest user configuration during Docker Compose generation. | dep: Docker Compose, tool manifest, Dockerfile generation, git mounts
+- mount-specificity-ordering.md | Proposes sorting Docker Compose volume mounts by target path depth to prevent broader mounts from hiding more specific ones | dep: Docker Compose, manifest_compiler.py, tool_instances.py
+- streamline-tool-container-definitions.md | Proposes a declarative YAML manifest system to replace hand-written Dockerfiles and Compose files for defining tool containers, with automatic compilation into Docker/Compose artifacts and compatibility with existing ConfigProfile mounts. | dep: Docker, Docker Compose, YAML/JSON parsing, database (PostgreSQL implied by JSONB), Python (implied by syntax examples), Node.js/npm, apt, git
+- terminal-responsiveness.md | Proposes architectural improvements to reduce web terminal latency and increase rendering performance through asyncio I/O, WebGL rendering, and WebSocket optimizations. | dep: docker, asyncio, WebSocket, WebGL, PTY, Docker Engine API
+## arch
+Markdown-based RFC/proposal pattern using individual specification documents for distinct feature proposals, covering Docker Compose generation, volume mounting semantics, YAML-driven declarative container definitions, and async I/O/WebSocket optimizations.
+## tags
+mounts, proposes, docker, home, tool, compose, config, target
+## symbols
+-
+## workflows
+-
+## dirty
+-