chore: bootstrap repo with chunks 1 and 2

Establishes the global AI development config repo from scratch:

- Chunk 1: repo skeleton, install.sh, statusline, deploy manifest
- Chunk 2: core instructions (coding/git/testing), CLAUDE.md rewrite
  (always-on + content index two-tier model), docs restructure,
  6 ADRs, ROADMAP.md, .gitkeep placeholders
- Bootstrap skills in .claude/skills/ (to be catalogued and migrated
  to .agents/skills/ in Chunk 3)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docs/issues/0002-install-sh.md

@@ -0,0 +1,28 @@
+# 0002 — install.sh — deploy script ✅
+
+## What to build
+
+Write `scripts/install.sh` — an idempotent script that deploys this repo's content to `~/.claude/` and creates `~/.agents/skills/` as an empty directory. Running it once wires Claude Code to use this repo as its global config source. Running it again after pulling updates is safe.
+
+Deployment targets:
+- `providers/claude-code/CLAUDE.md` → `~/.claude/CLAUDE.md`
+- `providers/claude-code/settings.json` → `~/.claude/settings.json`
+- `core/` → `~/.claude/core/` (full directory copy)
+- Create `~/.agents/skills/` as an empty directory
+
+Always overwrites deployed files — editing deployed files directly is a usage error, not a conflict. Creates directories if they don't exist.
+
+After writing the script, run it once and perform the manual smoke test.
+
+## Acceptance criteria
+
+- [ ] `scripts/install.sh` exists and is executable
+- [ ] Running it deploys `~/.claude/CLAUDE.md`, `~/.claude/settings.json`, and `~/.claude/core/instructions/global.md`
+- [ ] Running it creates `~/.agents/skills/` on disk
+- [ ] Running it a second time completes without errors (idempotency check)
+- [ ] A new Claude Code session confirms the always-on rule is in effect (ask Claude where it looks for workflows — it references `~/.claude/core/`)
+- [ ] Bootstrap skills at `.claude/skills/` are untouched
+
+## Blocked by
+
+- 0001 — Repo skeleton: content files