chore(skills): remove meta-mcp skills (file channel closed, canon=mappa)

- delete using-projects-meta, setup-projects-meta (repo+targets)
- delete meta-host-routing, setup-tasks, setup-wiki (targets)
- project-bootstrap: projects-meta refs → mappa (Step 8 registry, triggers, auth fallback), v3.1.0
- update-skills: drop projects-meta-mcp rebuild step, v0.3.0
- README: bootstrap delegation .wiki/.tasks → mappa registration

skills/project-bootstrap/SKILL.md

@@ -114,7 +114,7 @@ source ~/.config/projects-mcp/auth.toml 2>/dev/null || true
 Get-Content ~/.config/projects-mcp/auth.toml | Select-String "base_url|token"
 ```
 
-If auth file missing → stop and tell user: run `/setup-projects-meta` first.
+If auth file missing → stop and tell the user (нужны Gitea-креды; скил `setup-projects-meta` удалён 2026-08-25).
 
 ### Validate project name
 
@@ -398,11 +398,12 @@ recommend, don't menu
 we're on Windows
 ```
 
-The `check across all projects` line activates the `using-projects-meta` skill
-so cross-project task aggregation and the shared `projects-wiki` are available
-without an explicit verbal trigger. The skill is a no-op until the
-`projects-meta-mcp` server is registered — install via `setup-projects-meta`
-on a fresh machine if `mcp__projects-meta__*` tools are missing.
+The `check across all projects` trigger activates the **mappa** tooling
+(`mcp__mappa__*`) — cross-project boards, shared wiki and the project
+registry live in mappa. The file-based `projects-meta-mcp` and its skills
+(`using-projects-meta`, `setup-projects-meta`, `meta-host-routing`, `setup-wiki`,
+`setup-tasks`) were removed 2026-08-25; the shared `projects-wiki` files are
+stubs «не читать, не править» — канон mappa shared-scope.
 
 The `pull remote before work` line activates the `pulling-before-work` skill,
 which runs one `git pull --ff-only` at session start (and on explicit re-sync
@@ -515,7 +516,7 @@ Mismatch between template and map → silent gaps in the recommendation.
 | `talk like a caveman` | `caveman` | skill | `~/.claude/skills/caveman/SKILL.md` | `bash scripts/install.sh caveman` |
 | `use project wiki` | `using-wiki` | skill | `~/.claude/skills/using-wiki/SKILL.md` | `bash scripts/install.sh using-wiki` |
 | `use task management system` | `using-tasks` | skill | `~/.claude/skills/using-tasks/SKILL.md` | `bash scripts/install.sh using-tasks` |
-| `check across all projects` | `using-projects-meta` | skill | `~/.claude/skills/using-projects-meta/SKILL.md` | `bash scripts/install.sh using-projects-meta` |
+| `check across all projects` | mappa (`mcp__mappa__*`) | MCP | `mcpServers.mappa` in `~/.claude.json` | — |
 | `pull remote before work` | `pulling-before-work` | skill | `~/.claude/skills/pulling-before-work/SKILL.md` | `bash scripts/install.sh pulling-before-work` |
 | `session handoff: read on start, write on end` | `session-handoff` | skill | `~/.claude/skills/session-handoff/SKILL.md` | `bash scripts/install.sh session-handoff` |
 | `follow project discipline` | `project-discipline` | skill | `~/.claude/skills/project-discipline/SKILL.md` | `bash scripts/install.sh project-discipline` |
@@ -734,10 +735,10 @@ Remote: <Gitea URL>
 
 ---
 
-## Step 8 — projects-meta sync (greenfield-full mode)
+## Step 8 — mappa registry (greenfield-full mode)
 
-Only in **greenfield-full** mode. Re-sync the projects-meta cache so the new
-project becomes visible to `mcp__projects-meta__*` tools.
+Only in **greenfield-full** mode. Register the new project in mappa
+(`mcp__mappa__projects_register`) so it becomes visible in the registry.
 
 ```bash
 # POSIX: