Add claude-profile engagement mode picker with statusline and session-start integration

- claude-profile: phase 1-3 picker (profile, mode, launch) with preset support,
  dryrun, WezTerm theming, and --append-system-prompt mode body injection
- 5 mode files (chat/quick/deep/hybrid/orch) with YAML frontmatter + prose body;
  new escalates_to field drives statusline →Opus arrow for deep and hybrid
- statusline.sh reads CLAUDE_CONFIG_DIR/active-mode.env to show
  [Sonnet→Opus] deep · topic format when launched via claude-profile
- Root CLAUDE.md session-start: auto-selects project from cwd or CLAUDE_PROJECT
  in active-mode.env, skipping the interactive picker when context is clear
- Spec, tests (37 assertions, 9 test files, all passing), context docs, and
  preset example included

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

README.md

@@ -16,10 +16,47 @@ This project uses **spec-driven development** (OpenSpec) as a testbed for agent-
 |--------|---------|--------|
 | `git-status-report` | Recursive git repo status with diff stats | Done |
 | `md-to-docx` | Markdown to DOCX conversion | Done |
-| `claude-profile` | Claude Code profile management | Done |
+| `claude-profile` | Claude Code profile + engagement-mode launcher | Done |
 | `unreflected-logs` | Scan projects for unreflected session logs | Done |
 | `validate-skill` | Validate SKILL.md files against known Claude Code restrictions | Done |
 
+### Engagement modes (claude-profile)
+
+`claude-profile` launches Claude Code with both a configuration profile (selecting which `~/.claude-*` directory to use) and an **engagement mode** that bundles a driver model, subagent policy, async tolerance, and workflow stance:
+
+| Mode | Driver | For |
+|---|---|---|
+| `chat` | Haiku | No project, just conversation |
+| `quick` | Sonnet | Single small focused job, fully synchronous |
+| `deep` | Sonnet (Opus via named workflows) | Hard design or debugging, plan + spec enforced |
+| `hybrid` | Haiku (Opus/Sonnet on demand) | Long sessions, escalates only when needed |
+| `orch` | Sonnet | Decompose work and dispatch container agents |
+
+Mode definitions live in `data/claude-profile/modes/<name>.md` — YAML frontmatter (machine-parsed) plus a markdown body that becomes part of the system prompt.
+
+```bash
+claude-profile                              # interactive picker
+claude-profile oreillyit --mode deep        # explicit profile + mode
+claude-profile --preset deep-cluster        # named preset from presets.yaml
+claude-profile --dryrun [...]               # show resolved values, do not launch
+```
+
+Copy `data/claude-profile/presets.yaml.example` to `$CLAUDE_CONFIG_DIR/presets.yaml` to set up named presets.
+
+## Repository Structure
+
+```
+small-scripts/
+├── scripts/                  # Executable scripts (symlinked into ~/sbin)
+├── specs/                    # OpenSpec files, one per script
+├── tests/                    # Test scripts that exercise --dryrun
+├── data/                     # Read-only data files used by scripts
+│   └── claude-profile/
+│       ├── modes/            # Engagement mode definitions
+│       └── presets.yaml.example
+└── memory/                   # Tiered memory topic files
+```
+
 ## Quick Start
 
 ```bash